* [PATCH net-next 1/2] sparc: Split BPF JIT into 32-bit and 64-bit.
@ 2017-04-18 18:58 ` David Miller
0 siblings, 0 replies; 6+ messages in thread
From: David Miller @ 2017-04-18 18:58 UTC (permalink / raw)
To: sparclinux; +Cc: netdev, ast, daniel
This is in preparation for adding the 64-bit eBPF JIT.
Signed-off-by: David S. Miller <davem@davemloft.net>
---
arch/sparc/net/Makefile | 2 +-
arch/sparc/net/bpf_jit.h | 68 ----
arch/sparc/net/bpf_jit_32.h | 68 ++++
arch/sparc/net/bpf_jit_asm.S | 208 ----------
arch/sparc/net/bpf_jit_asm_32.S | 208 ++++++++++
arch/sparc/net/bpf_jit_asm_64.S | 1 +
arch/sparc/net/bpf_jit_comp.c | 815 ---------------------------------------
arch/sparc/net/bpf_jit_comp_32.c | 815 +++++++++++++++++++++++++++++++++++++++
arch/sparc/net/bpf_jit_comp_64.c | 1 +
9 files changed, 1094 insertions(+), 1092 deletions(-)
delete mode 100644 arch/sparc/net/bpf_jit.h
create mode 100644 arch/sparc/net/bpf_jit_32.h
delete mode 100644 arch/sparc/net/bpf_jit_asm.S
create mode 100644 arch/sparc/net/bpf_jit_asm_32.S
create mode 100644 arch/sparc/net/bpf_jit_asm_64.S
delete mode 100644 arch/sparc/net/bpf_jit_comp.c
create mode 100644 arch/sparc/net/bpf_jit_comp_32.c
create mode 100644 arch/sparc/net/bpf_jit_comp_64.c
diff --git a/arch/sparc/net/Makefile b/arch/sparc/net/Makefile
index 1306a58..76fa8e9 100644
--- a/arch/sparc/net/Makefile
+++ b/arch/sparc/net/Makefile
@@ -1,4 +1,4 @@
#
# Arch-specific network modules
#
-obj-$(CONFIG_BPF_JIT) += bpf_jit_asm.o bpf_jit_comp.o
+obj-$(CONFIG_BPF_JIT) += bpf_jit_asm_$(BITS).o bpf_jit_comp_$(BITS).o
diff --git a/arch/sparc/net/bpf_jit.h b/arch/sparc/net/bpf_jit.h
deleted file mode 100644
index 33d6b37..0000000
--- a/arch/sparc/net/bpf_jit.h
+++ /dev/null
@@ -1,68 +0,0 @@
-#ifndef _BPF_JIT_H
-#define _BPF_JIT_H
-
-/* Conventions:
- * %g1 : temporary
- * %g2 : Secondary temporary used by SKB data helper stubs.
- * %g3 : packet offset passed into SKB data helper stubs.
- * %o0 : pointer to skb (first argument given to JIT function)
- * %o1 : BPF A accumulator
- * %o2 : BPF X accumulator
- * %o3 : Holds saved %o7 so we can call helper functions without needing
- * to allocate a register window.
- * %o4 : skb->len - skb->data_len
- * %o5 : skb->data
- */
-
-#ifndef __ASSEMBLER__
-#define G0 0x00
-#define G1 0x01
-#define G3 0x03
-#define G6 0x06
-#define O0 0x08
-#define O1 0x09
-#define O2 0x0a
-#define O3 0x0b
-#define O4 0x0c
-#define O5 0x0d
-#define SP 0x0e
-#define O7 0x0f
-#define FP 0x1e
-
-#define r_SKB O0
-#define r_A O1
-#define r_X O2
-#define r_saved_O7 O3
-#define r_HEADLEN O4
-#define r_SKB_DATA O5
-#define r_TMP G1
-#define r_TMP2 G2
-#define r_OFF G3
-
-/* assembly code in arch/sparc/net/bpf_jit_asm.S */
-extern u32 bpf_jit_load_word[];
-extern u32 bpf_jit_load_half[];
-extern u32 bpf_jit_load_byte[];
-extern u32 bpf_jit_load_byte_msh[];
-extern u32 bpf_jit_load_word_positive_offset[];
-extern u32 bpf_jit_load_half_positive_offset[];
-extern u32 bpf_jit_load_byte_positive_offset[];
-extern u32 bpf_jit_load_byte_msh_positive_offset[];
-extern u32 bpf_jit_load_word_negative_offset[];
-extern u32 bpf_jit_load_half_negative_offset[];
-extern u32 bpf_jit_load_byte_negative_offset[];
-extern u32 bpf_jit_load_byte_msh_negative_offset[];
-
-#else
-#define r_SKB %o0
-#define r_A %o1
-#define r_X %o2
-#define r_saved_O7 %o3
-#define r_HEADLEN %o4
-#define r_SKB_DATA %o5
-#define r_TMP %g1
-#define r_TMP2 %g2
-#define r_OFF %g3
-#endif
-
-#endif /* _BPF_JIT_H */
diff --git a/arch/sparc/net/bpf_jit_32.h b/arch/sparc/net/bpf_jit_32.h
new file mode 100644
index 0000000..33d6b37
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_32.h
@@ -0,0 +1,68 @@
+#ifndef _BPF_JIT_H
+#define _BPF_JIT_H
+
+/* Conventions:
+ * %g1 : temporary
+ * %g2 : Secondary temporary used by SKB data helper stubs.
+ * %g3 : packet offset passed into SKB data helper stubs.
+ * %o0 : pointer to skb (first argument given to JIT function)
+ * %o1 : BPF A accumulator
+ * %o2 : BPF X accumulator
+ * %o3 : Holds saved %o7 so we can call helper functions without needing
+ * to allocate a register window.
+ * %o4 : skb->len - skb->data_len
+ * %o5 : skb->data
+ */
+
+#ifndef __ASSEMBLER__
+#define G0 0x00
+#define G1 0x01
+#define G3 0x03
+#define G6 0x06
+#define O0 0x08
+#define O1 0x09
+#define O2 0x0a
+#define O3 0x0b
+#define O4 0x0c
+#define O5 0x0d
+#define SP 0x0e
+#define O7 0x0f
+#define FP 0x1e
+
+#define r_SKB O0
+#define r_A O1
+#define r_X O2
+#define r_saved_O7 O3
+#define r_HEADLEN O4
+#define r_SKB_DATA O5
+#define r_TMP G1
+#define r_TMP2 G2
+#define r_OFF G3
+
+/* assembly code in arch/sparc/net/bpf_jit_asm.S */
+extern u32 bpf_jit_load_word[];
+extern u32 bpf_jit_load_half[];
+extern u32 bpf_jit_load_byte[];
+extern u32 bpf_jit_load_byte_msh[];
+extern u32 bpf_jit_load_word_positive_offset[];
+extern u32 bpf_jit_load_half_positive_offset[];
+extern u32 bpf_jit_load_byte_positive_offset[];
+extern u32 bpf_jit_load_byte_msh_positive_offset[];
+extern u32 bpf_jit_load_word_negative_offset[];
+extern u32 bpf_jit_load_half_negative_offset[];
+extern u32 bpf_jit_load_byte_negative_offset[];
+extern u32 bpf_jit_load_byte_msh_negative_offset[];
+
+#else
+#define r_SKB %o0
+#define r_A %o1
+#define r_X %o2
+#define r_saved_O7 %o3
+#define r_HEADLEN %o4
+#define r_SKB_DATA %o5
+#define r_TMP %g1
+#define r_TMP2 %g2
+#define r_OFF %g3
+#endif
+
+#endif /* _BPF_JIT_H */
diff --git a/arch/sparc/net/bpf_jit_asm.S b/arch/sparc/net/bpf_jit_asm.S
deleted file mode 100644
index 8c83f4b..0000000
--- a/arch/sparc/net/bpf_jit_asm.S
+++ /dev/null
@@ -1,208 +0,0 @@
-#include <asm/ptrace.h>
-
-#include "bpf_jit.h"
-
-#ifdef CONFIG_SPARC64
-#define SAVE_SZ 176
-#define SCRATCH_OFF STACK_BIAS + 128
-#define BE_PTR(label) be,pn %xcc, label
-#define SIGN_EXTEND(reg) sra reg, 0, reg
-#else
-#define SAVE_SZ 96
-#define SCRATCH_OFF 72
-#define BE_PTR(label) be label
-#define SIGN_EXTEND(reg)
-#endif
-
-#define SKF_MAX_NEG_OFF (-0x200000) /* SKF_LL_OFF from filter.h */
-
- .text
- .globl bpf_jit_load_word
-bpf_jit_load_word:
- cmp r_OFF, 0
- bl bpf_slow_path_word_neg
- nop
- .globl bpf_jit_load_word_positive_offset
-bpf_jit_load_word_positive_offset:
- sub r_HEADLEN, r_OFF, r_TMP
- cmp r_TMP, 3
- ble bpf_slow_path_word
- add r_SKB_DATA, r_OFF, r_TMP
- andcc r_TMP, 3, %g0
- bne load_word_unaligned
- nop
- retl
- ld [r_TMP], r_A
-load_word_unaligned:
- ldub [r_TMP + 0x0], r_OFF
- ldub [r_TMP + 0x1], r_TMP2
- sll r_OFF, 8, r_OFF
- or r_OFF, r_TMP2, r_OFF
- ldub [r_TMP + 0x2], r_TMP2
- sll r_OFF, 8, r_OFF
- or r_OFF, r_TMP2, r_OFF
- ldub [r_TMP + 0x3], r_TMP2
- sll r_OFF, 8, r_OFF
- retl
- or r_OFF, r_TMP2, r_A
-
- .globl bpf_jit_load_half
-bpf_jit_load_half:
- cmp r_OFF, 0
- bl bpf_slow_path_half_neg
- nop
- .globl bpf_jit_load_half_positive_offset
-bpf_jit_load_half_positive_offset:
- sub r_HEADLEN, r_OFF, r_TMP
- cmp r_TMP, 1
- ble bpf_slow_path_half
- add r_SKB_DATA, r_OFF, r_TMP
- andcc r_TMP, 1, %g0
- bne load_half_unaligned
- nop
- retl
- lduh [r_TMP], r_A
-load_half_unaligned:
- ldub [r_TMP + 0x0], r_OFF
- ldub [r_TMP + 0x1], r_TMP2
- sll r_OFF, 8, r_OFF
- retl
- or r_OFF, r_TMP2, r_A
-
- .globl bpf_jit_load_byte
-bpf_jit_load_byte:
- cmp r_OFF, 0
- bl bpf_slow_path_byte_neg
- nop
- .globl bpf_jit_load_byte_positive_offset
-bpf_jit_load_byte_positive_offset:
- cmp r_OFF, r_HEADLEN
- bge bpf_slow_path_byte
- nop
- retl
- ldub [r_SKB_DATA + r_OFF], r_A
-
- .globl bpf_jit_load_byte_msh
-bpf_jit_load_byte_msh:
- cmp r_OFF, 0
- bl bpf_slow_path_byte_msh_neg
- nop
- .globl bpf_jit_load_byte_msh_positive_offset
-bpf_jit_load_byte_msh_positive_offset:
- cmp r_OFF, r_HEADLEN
- bge bpf_slow_path_byte_msh
- nop
- ldub [r_SKB_DATA + r_OFF], r_OFF
- and r_OFF, 0xf, r_OFF
- retl
- sll r_OFF, 2, r_X
-
-#define bpf_slow_path_common(LEN) \
- save %sp, -SAVE_SZ, %sp; \
- mov %i0, %o0; \
- mov r_OFF, %o1; \
- add %fp, SCRATCH_OFF, %o2; \
- call skb_copy_bits; \
- mov (LEN), %o3; \
- cmp %o0, 0; \
- restore;
-
-bpf_slow_path_word:
- bpf_slow_path_common(4)
- bl bpf_error
- ld [%sp + SCRATCH_OFF], r_A
- retl
- nop
-bpf_slow_path_half:
- bpf_slow_path_common(2)
- bl bpf_error
- lduh [%sp + SCRATCH_OFF], r_A
- retl
- nop
-bpf_slow_path_byte:
- bpf_slow_path_common(1)
- bl bpf_error
- ldub [%sp + SCRATCH_OFF], r_A
- retl
- nop
-bpf_slow_path_byte_msh:
- bpf_slow_path_common(1)
- bl bpf_error
- ldub [%sp + SCRATCH_OFF], r_A
- and r_OFF, 0xf, r_OFF
- retl
- sll r_OFF, 2, r_X
-
-#define bpf_negative_common(LEN) \
- save %sp, -SAVE_SZ, %sp; \
- mov %i0, %o0; \
- mov r_OFF, %o1; \
- SIGN_EXTEND(%o1); \
- call bpf_internal_load_pointer_neg_helper; \
- mov (LEN), %o2; \
- mov %o0, r_TMP; \
- cmp %o0, 0; \
- BE_PTR(bpf_error); \
- restore;
-
-bpf_slow_path_word_neg:
- sethi %hi(SKF_MAX_NEG_OFF), r_TMP
- cmp r_OFF, r_TMP
- bl bpf_error
- nop
- .globl bpf_jit_load_word_negative_offset
-bpf_jit_load_word_negative_offset:
- bpf_negative_common(4)
- andcc r_TMP, 3, %g0
- bne load_word_unaligned
- nop
- retl
- ld [r_TMP], r_A
-
-bpf_slow_path_half_neg:
- sethi %hi(SKF_MAX_NEG_OFF), r_TMP
- cmp r_OFF, r_TMP
- bl bpf_error
- nop
- .globl bpf_jit_load_half_negative_offset
-bpf_jit_load_half_negative_offset:
- bpf_negative_common(2)
- andcc r_TMP, 1, %g0
- bne load_half_unaligned
- nop
- retl
- lduh [r_TMP], r_A
-
-bpf_slow_path_byte_neg:
- sethi %hi(SKF_MAX_NEG_OFF), r_TMP
- cmp r_OFF, r_TMP
- bl bpf_error
- nop
- .globl bpf_jit_load_byte_negative_offset
-bpf_jit_load_byte_negative_offset:
- bpf_negative_common(1)
- retl
- ldub [r_TMP], r_A
-
-bpf_slow_path_byte_msh_neg:
- sethi %hi(SKF_MAX_NEG_OFF), r_TMP
- cmp r_OFF, r_TMP
- bl bpf_error
- nop
- .globl bpf_jit_load_byte_msh_negative_offset
-bpf_jit_load_byte_msh_negative_offset:
- bpf_negative_common(1)
- ldub [r_TMP], r_OFF
- and r_OFF, 0xf, r_OFF
- retl
- sll r_OFF, 2, r_X
-
-bpf_error:
- /* Make the JIT program return zero. The JIT epilogue
- * stores away the original %o7 into r_saved_O7. The
- * normal leaf function return is to use "retl" which
- * would evalute to "jmpl %o7 + 8, %g0" but we want to
- * use the saved value thus the sequence you see here.
- */
- jmpl r_saved_O7 + 8, %g0
- clr %o0
diff --git a/arch/sparc/net/bpf_jit_asm_32.S b/arch/sparc/net/bpf_jit_asm_32.S
new file mode 100644
index 0000000..5632cdc
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_asm_32.S
@@ -0,0 +1,208 @@
+#include <asm/ptrace.h>
+
+#include "bpf_jit_32.h"
+
+#ifdef CONFIG_SPARC64
+#define SAVE_SZ 176
+#define SCRATCH_OFF STACK_BIAS + 128
+#define BE_PTR(label) be,pn %xcc, label
+#define SIGN_EXTEND(reg) sra reg, 0, reg
+#else
+#define SAVE_SZ 96
+#define SCRATCH_OFF 72
+#define BE_PTR(label) be label
+#define SIGN_EXTEND(reg)
+#endif
+
+#define SKF_MAX_NEG_OFF (-0x200000) /* SKF_LL_OFF from filter.h */
+
+ .text
+ .globl bpf_jit_load_word
+bpf_jit_load_word:
+ cmp r_OFF, 0
+ bl bpf_slow_path_word_neg
+ nop
+ .globl bpf_jit_load_word_positive_offset
+bpf_jit_load_word_positive_offset:
+ sub r_HEADLEN, r_OFF, r_TMP
+ cmp r_TMP, 3
+ ble bpf_slow_path_word
+ add r_SKB_DATA, r_OFF, r_TMP
+ andcc r_TMP, 3, %g0
+ bne load_word_unaligned
+ nop
+ retl
+ ld [r_TMP], r_A
+load_word_unaligned:
+ ldub [r_TMP + 0x0], r_OFF
+ ldub [r_TMP + 0x1], r_TMP2
+ sll r_OFF, 8, r_OFF
+ or r_OFF, r_TMP2, r_OFF
+ ldub [r_TMP + 0x2], r_TMP2
+ sll r_OFF, 8, r_OFF
+ or r_OFF, r_TMP2, r_OFF
+ ldub [r_TMP + 0x3], r_TMP2
+ sll r_OFF, 8, r_OFF
+ retl
+ or r_OFF, r_TMP2, r_A
+
+ .globl bpf_jit_load_half
+bpf_jit_load_half:
+ cmp r_OFF, 0
+ bl bpf_slow_path_half_neg
+ nop
+ .globl bpf_jit_load_half_positive_offset
+bpf_jit_load_half_positive_offset:
+ sub r_HEADLEN, r_OFF, r_TMP
+ cmp r_TMP, 1
+ ble bpf_slow_path_half
+ add r_SKB_DATA, r_OFF, r_TMP
+ andcc r_TMP, 1, %g0
+ bne load_half_unaligned
+ nop
+ retl
+ lduh [r_TMP], r_A
+load_half_unaligned:
+ ldub [r_TMP + 0x0], r_OFF
+ ldub [r_TMP + 0x1], r_TMP2
+ sll r_OFF, 8, r_OFF
+ retl
+ or r_OFF, r_TMP2, r_A
+
+ .globl bpf_jit_load_byte
+bpf_jit_load_byte:
+ cmp r_OFF, 0
+ bl bpf_slow_path_byte_neg
+ nop
+ .globl bpf_jit_load_byte_positive_offset
+bpf_jit_load_byte_positive_offset:
+ cmp r_OFF, r_HEADLEN
+ bge bpf_slow_path_byte
+ nop
+ retl
+ ldub [r_SKB_DATA + r_OFF], r_A
+
+ .globl bpf_jit_load_byte_msh
+bpf_jit_load_byte_msh:
+ cmp r_OFF, 0
+ bl bpf_slow_path_byte_msh_neg
+ nop
+ .globl bpf_jit_load_byte_msh_positive_offset
+bpf_jit_load_byte_msh_positive_offset:
+ cmp r_OFF, r_HEADLEN
+ bge bpf_slow_path_byte_msh
+ nop
+ ldub [r_SKB_DATA + r_OFF], r_OFF
+ and r_OFF, 0xf, r_OFF
+ retl
+ sll r_OFF, 2, r_X
+
+#define bpf_slow_path_common(LEN) \
+ save %sp, -SAVE_SZ, %sp; \
+ mov %i0, %o0; \
+ mov r_OFF, %o1; \
+ add %fp, SCRATCH_OFF, %o2; \
+ call skb_copy_bits; \
+ mov (LEN), %o3; \
+ cmp %o0, 0; \
+ restore;
+
+bpf_slow_path_word:
+ bpf_slow_path_common(4)
+ bl bpf_error
+ ld [%sp + SCRATCH_OFF], r_A
+ retl
+ nop
+bpf_slow_path_half:
+ bpf_slow_path_common(2)
+ bl bpf_error
+ lduh [%sp + SCRATCH_OFF], r_A
+ retl
+ nop
+bpf_slow_path_byte:
+ bpf_slow_path_common(1)
+ bl bpf_error
+ ldub [%sp + SCRATCH_OFF], r_A
+ retl
+ nop
+bpf_slow_path_byte_msh:
+ bpf_slow_path_common(1)
+ bl bpf_error
+ ldub [%sp + SCRATCH_OFF], r_A
+ and r_OFF, 0xf, r_OFF
+ retl
+ sll r_OFF, 2, r_X
+
+#define bpf_negative_common(LEN) \
+ save %sp, -SAVE_SZ, %sp; \
+ mov %i0, %o0; \
+ mov r_OFF, %o1; \
+ SIGN_EXTEND(%o1); \
+ call bpf_internal_load_pointer_neg_helper; \
+ mov (LEN), %o2; \
+ mov %o0, r_TMP; \
+ cmp %o0, 0; \
+ BE_PTR(bpf_error); \
+ restore;
+
+bpf_slow_path_word_neg:
+ sethi %hi(SKF_MAX_NEG_OFF), r_TMP
+ cmp r_OFF, r_TMP
+ bl bpf_error
+ nop
+ .globl bpf_jit_load_word_negative_offset
+bpf_jit_load_word_negative_offset:
+ bpf_negative_common(4)
+ andcc r_TMP, 3, %g0
+ bne load_word_unaligned
+ nop
+ retl
+ ld [r_TMP], r_A
+
+bpf_slow_path_half_neg:
+ sethi %hi(SKF_MAX_NEG_OFF), r_TMP
+ cmp r_OFF, r_TMP
+ bl bpf_error
+ nop
+ .globl bpf_jit_load_half_negative_offset
+bpf_jit_load_half_negative_offset:
+ bpf_negative_common(2)
+ andcc r_TMP, 1, %g0
+ bne load_half_unaligned
+ nop
+ retl
+ lduh [r_TMP], r_A
+
+bpf_slow_path_byte_neg:
+ sethi %hi(SKF_MAX_NEG_OFF), r_TMP
+ cmp r_OFF, r_TMP
+ bl bpf_error
+ nop
+ .globl bpf_jit_load_byte_negative_offset
+bpf_jit_load_byte_negative_offset:
+ bpf_negative_common(1)
+ retl
+ ldub [r_TMP], r_A
+
+bpf_slow_path_byte_msh_neg:
+ sethi %hi(SKF_MAX_NEG_OFF), r_TMP
+ cmp r_OFF, r_TMP
+ bl bpf_error
+ nop
+ .globl bpf_jit_load_byte_msh_negative_offset
+bpf_jit_load_byte_msh_negative_offset:
+ bpf_negative_common(1)
+ ldub [r_TMP], r_OFF
+ and r_OFF, 0xf, r_OFF
+ retl
+ sll r_OFF, 2, r_X
+
+bpf_error:
+ /* Make the JIT program return zero. The JIT epilogue
+ * stores away the original %o7 into r_saved_O7. The
+ * normal leaf function return is to use "retl" which
+ * would evalute to "jmpl %o7 + 8, %g0" but we want to
+ * use the saved value thus the sequence you see here.
+ */
+ jmpl r_saved_O7 + 8, %g0
+ clr %o0
diff --git a/arch/sparc/net/bpf_jit_asm_64.S b/arch/sparc/net/bpf_jit_asm_64.S
new file mode 100644
index 0000000..6fb023f
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_asm_64.S
@@ -0,0 +1 @@
+#include "bpf_jit_asm_32.S"
diff --git a/arch/sparc/net/bpf_jit_comp.c b/arch/sparc/net/bpf_jit_comp.c
deleted file mode 100644
index a6d9204..0000000
--- a/arch/sparc/net/bpf_jit_comp.c
+++ /dev/null
@@ -1,815 +0,0 @@
-#include <linux/moduleloader.h>
-#include <linux/workqueue.h>
-#include <linux/netdevice.h>
-#include <linux/filter.h>
-#include <linux/cache.h>
-#include <linux/if_vlan.h>
-
-#include <asm/cacheflush.h>
-#include <asm/ptrace.h>
-
-#include "bpf_jit.h"
-
-int bpf_jit_enable __read_mostly;
-
-static inline bool is_simm13(unsigned int value)
-{
- return value + 0x1000 < 0x2000;
-}
-
-static void bpf_flush_icache(void *start_, void *end_)
-{
-#ifdef CONFIG_SPARC64
- /* Cheetah's I-cache is fully coherent. */
- if (tlb_type == spitfire) {
- unsigned long start = (unsigned long) start_;
- unsigned long end = (unsigned long) end_;
-
- start &= ~7UL;
- end = (end + 7UL) & ~7UL;
- while (start < end) {
- flushi(start);
- start += 32;
- }
- }
-#endif
-}
-
-#define SEEN_DATAREF 1 /* might call external helpers */
-#define SEEN_XREG 2 /* ebx is used */
-#define SEEN_MEM 4 /* use mem[] for temporary storage */
-
-#define S13(X) ((X) & 0x1fff)
-#define IMMED 0x00002000
-#define RD(X) ((X) << 25)
-#define RS1(X) ((X) << 14)
-#define RS2(X) ((X))
-#define OP(X) ((X) << 30)
-#define OP2(X) ((X) << 22)
-#define OP3(X) ((X) << 19)
-#define COND(X) ((X) << 25)
-#define F1(X) OP(X)
-#define F2(X, Y) (OP(X) | OP2(Y))
-#define F3(X, Y) (OP(X) | OP3(Y))
-
-#define CONDN COND(0x0)
-#define CONDE COND(0x1)
-#define CONDLE COND(0x2)
-#define CONDL COND(0x3)
-#define CONDLEU COND(0x4)
-#define CONDCS COND(0x5)
-#define CONDNEG COND(0x6)
-#define CONDVC COND(0x7)
-#define CONDA COND(0x8)
-#define CONDNE COND(0x9)
-#define CONDG COND(0xa)
-#define CONDGE COND(0xb)
-#define CONDGU COND(0xc)
-#define CONDCC COND(0xd)
-#define CONDPOS COND(0xe)
-#define CONDVS COND(0xf)
-
-#define CONDGEU CONDCC
-#define CONDLU CONDCS
-
-#define WDISP22(X) (((X) >> 2) & 0x3fffff)
-
-#define BA (F2(0, 2) | CONDA)
-#define BGU (F2(0, 2) | CONDGU)
-#define BLEU (F2(0, 2) | CONDLEU)
-#define BGEU (F2(0, 2) | CONDGEU)
-#define BLU (F2(0, 2) | CONDLU)
-#define BE (F2(0, 2) | CONDE)
-#define BNE (F2(0, 2) | CONDNE)
-
-#ifdef CONFIG_SPARC64
-#define BE_PTR (F2(0, 1) | CONDE | (2 << 20))
-#else
-#define BE_PTR BE
-#endif
-
-#define SETHI(K, REG) \
- (F2(0, 0x4) | RD(REG) | (((K) >> 10) & 0x3fffff))
-#define OR_LO(K, REG) \
- (F3(2, 0x02) | IMMED | RS1(REG) | ((K) & 0x3ff) | RD(REG))
-
-#define ADD F3(2, 0x00)
-#define AND F3(2, 0x01)
-#define ANDCC F3(2, 0x11)
-#define OR F3(2, 0x02)
-#define XOR F3(2, 0x03)
-#define SUB F3(2, 0x04)
-#define SUBCC F3(2, 0x14)
-#define MUL F3(2, 0x0a) /* umul */
-#define DIV F3(2, 0x0e) /* udiv */
-#define SLL F3(2, 0x25)
-#define SRL F3(2, 0x26)
-#define JMPL F3(2, 0x38)
-#define CALL F1(1)
-#define BR F2(0, 0x01)
-#define RD_Y F3(2, 0x28)
-#define WR_Y F3(2, 0x30)
-
-#define LD32 F3(3, 0x00)
-#define LD8 F3(3, 0x01)
-#define LD16 F3(3, 0x02)
-#define LD64 F3(3, 0x0b)
-#define ST32 F3(3, 0x04)
-
-#ifdef CONFIG_SPARC64
-#define LDPTR LD64
-#define BASE_STACKFRAME 176
-#else
-#define LDPTR LD32
-#define BASE_STACKFRAME 96
-#endif
-
-#define LD32I (LD32 | IMMED)
-#define LD8I (LD8 | IMMED)
-#define LD16I (LD16 | IMMED)
-#define LD64I (LD64 | IMMED)
-#define LDPTRI (LDPTR | IMMED)
-#define ST32I (ST32 | IMMED)
-
-#define emit_nop() \
-do { \
- *prog++ = SETHI(0, G0); \
-} while (0)
-
-#define emit_neg() \
-do { /* sub %g0, r_A, r_A */ \
- *prog++ = SUB | RS1(G0) | RS2(r_A) | RD(r_A); \
-} while (0)
-
-#define emit_reg_move(FROM, TO) \
-do { /* or %g0, FROM, TO */ \
- *prog++ = OR | RS1(G0) | RS2(FROM) | RD(TO); \
-} while (0)
-
-#define emit_clear(REG) \
-do { /* or %g0, %g0, REG */ \
- *prog++ = OR | RS1(G0) | RS2(G0) | RD(REG); \
-} while (0)
-
-#define emit_set_const(K, REG) \
-do { /* sethi %hi(K), REG */ \
- *prog++ = SETHI(K, REG); \
- /* or REG, %lo(K), REG */ \
- *prog++ = OR_LO(K, REG); \
-} while (0)
-
- /* Emit
- *
- * OP r_A, r_X, r_A
- */
-#define emit_alu_X(OPCODE) \
-do { \
- seen |= SEEN_XREG; \
- *prog++ = OPCODE | RS1(r_A) | RS2(r_X) | RD(r_A); \
-} while (0)
-
- /* Emit either:
- *
- * OP r_A, K, r_A
- *
- * or
- *
- * sethi %hi(K), r_TMP
- * or r_TMP, %lo(K), r_TMP
- * OP r_A, r_TMP, r_A
- *
- * depending upon whether K fits in a signed 13-bit
- * immediate instruction field. Emit nothing if K
- * is zero.
- */
-#define emit_alu_K(OPCODE, K) \
-do { \
- if (K || OPCODE == AND || OPCODE == MUL) { \
- unsigned int _insn = OPCODE; \
- _insn |= RS1(r_A) | RD(r_A); \
- if (is_simm13(K)) { \
- *prog++ = _insn | IMMED | S13(K); \
- } else { \
- emit_set_const(K, r_TMP); \
- *prog++ = _insn | RS2(r_TMP); \
- } \
- } \
-} while (0)
-
-#define emit_loadimm(K, DEST) \
-do { \
- if (is_simm13(K)) { \
- /* or %g0, K, DEST */ \
- *prog++ = OR | IMMED | RS1(G0) | S13(K) | RD(DEST); \
- } else { \
- emit_set_const(K, DEST); \
- } \
-} while (0)
-
-#define emit_loadptr(BASE, STRUCT, FIELD, DEST) \
-do { unsigned int _off = offsetof(STRUCT, FIELD); \
- BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(void *)); \
- *prog++ = LDPTRI | RS1(BASE) | S13(_off) | RD(DEST); \
-} while (0)
-
-#define emit_load32(BASE, STRUCT, FIELD, DEST) \
-do { unsigned int _off = offsetof(STRUCT, FIELD); \
- BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(u32)); \
- *prog++ = LD32I | RS1(BASE) | S13(_off) | RD(DEST); \
-} while (0)
-
-#define emit_load16(BASE, STRUCT, FIELD, DEST) \
-do { unsigned int _off = offsetof(STRUCT, FIELD); \
- BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(u16)); \
- *prog++ = LD16I | RS1(BASE) | S13(_off) | RD(DEST); \
-} while (0)
-
-#define __emit_load8(BASE, STRUCT, FIELD, DEST) \
-do { unsigned int _off = offsetof(STRUCT, FIELD); \
- *prog++ = LD8I | RS1(BASE) | S13(_off) | RD(DEST); \
-} while (0)
-
-#define emit_load8(BASE, STRUCT, FIELD, DEST) \
-do { BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(u8)); \
- __emit_load8(BASE, STRUCT, FIELD, DEST); \
-} while (0)
-
-#ifdef CONFIG_SPARC64
-#define BIAS (STACK_BIAS - 4)
-#else
-#define BIAS (-4)
-#endif
-
-#define emit_ldmem(OFF, DEST) \
-do { *prog++ = LD32I | RS1(SP) | S13(BIAS - (OFF)) | RD(DEST); \
-} while (0)
-
-#define emit_stmem(OFF, SRC) \
-do { *prog++ = ST32I | RS1(SP) | S13(BIAS - (OFF)) | RD(SRC); \
-} while (0)
-
-#ifdef CONFIG_SMP
-#ifdef CONFIG_SPARC64
-#define emit_load_cpu(REG) \
- emit_load16(G6, struct thread_info, cpu, REG)
-#else
-#define emit_load_cpu(REG) \
- emit_load32(G6, struct thread_info, cpu, REG)
-#endif
-#else
-#define emit_load_cpu(REG) emit_clear(REG)
-#endif
-
-#define emit_skb_loadptr(FIELD, DEST) \
- emit_loadptr(r_SKB, struct sk_buff, FIELD, DEST)
-#define emit_skb_load32(FIELD, DEST) \
- emit_load32(r_SKB, struct sk_buff, FIELD, DEST)
-#define emit_skb_load16(FIELD, DEST) \
- emit_load16(r_SKB, struct sk_buff, FIELD, DEST)
-#define __emit_skb_load8(FIELD, DEST) \
- __emit_load8(r_SKB, struct sk_buff, FIELD, DEST)
-#define emit_skb_load8(FIELD, DEST) \
- emit_load8(r_SKB, struct sk_buff, FIELD, DEST)
-
-#define emit_jmpl(BASE, IMM_OFF, LREG) \
- *prog++ = (JMPL | IMMED | RS1(BASE) | S13(IMM_OFF) | RD(LREG))
-
-#define emit_call(FUNC) \
-do { void *_here = image + addrs[i] - 8; \
- unsigned int _off = (void *)(FUNC) - _here; \
- *prog++ = CALL | (((_off) >> 2) & 0x3fffffff); \
- emit_nop(); \
-} while (0)
-
-#define emit_branch(BR_OPC, DEST) \
-do { unsigned int _here = addrs[i] - 8; \
- *prog++ = BR_OPC | WDISP22((DEST) - _here); \
-} while (0)
-
-#define emit_branch_off(BR_OPC, OFF) \
-do { *prog++ = BR_OPC | WDISP22(OFF); \
-} while (0)
-
-#define emit_jump(DEST) emit_branch(BA, DEST)
-
-#define emit_read_y(REG) *prog++ = RD_Y | RD(REG)
-#define emit_write_y(REG) *prog++ = WR_Y | IMMED | RS1(REG) | S13(0)
-
-#define emit_cmp(R1, R2) \
- *prog++ = (SUBCC | RS1(R1) | RS2(R2) | RD(G0))
-
-#define emit_cmpi(R1, IMM) \
- *prog++ = (SUBCC | IMMED | RS1(R1) | S13(IMM) | RD(G0));
-
-#define emit_btst(R1, R2) \
- *prog++ = (ANDCC | RS1(R1) | RS2(R2) | RD(G0))
-
-#define emit_btsti(R1, IMM) \
- *prog++ = (ANDCC | IMMED | RS1(R1) | S13(IMM) | RD(G0));
-
-#define emit_sub(R1, R2, R3) \
- *prog++ = (SUB | RS1(R1) | RS2(R2) | RD(R3))
-
-#define emit_subi(R1, IMM, R3) \
- *prog++ = (SUB | IMMED | RS1(R1) | S13(IMM) | RD(R3))
-
-#define emit_add(R1, R2, R3) \
- *prog++ = (ADD | RS1(R1) | RS2(R2) | RD(R3))
-
-#define emit_addi(R1, IMM, R3) \
- *prog++ = (ADD | IMMED | RS1(R1) | S13(IMM) | RD(R3))
-
-#define emit_and(R1, R2, R3) \
- *prog++ = (AND | RS1(R1) | RS2(R2) | RD(R3))
-
-#define emit_andi(R1, IMM, R3) \
- *prog++ = (AND | IMMED | RS1(R1) | S13(IMM) | RD(R3))
-
-#define emit_alloc_stack(SZ) \
- *prog++ = (SUB | IMMED | RS1(SP) | S13(SZ) | RD(SP))
-
-#define emit_release_stack(SZ) \
- *prog++ = (ADD | IMMED | RS1(SP) | S13(SZ) | RD(SP))
-
-/* A note about branch offset calculations. The addrs[] array,
- * indexed by BPF instruction, records the address after all the
- * sparc instructions emitted for that BPF instruction.
- *
- * The most common case is to emit a branch at the end of such
- * a code sequence. So this would be two instructions, the
- * branch and it's delay slot.
- *
- * Therefore by default the branch emitters calculate the branch
- * offset field as:
- *
- * destination - (addrs[i] - 8)
- *
- * This "addrs[i] - 8" is the address of the branch itself or
- * what "." would be in assembler notation. The "8" part is
- * how we take into consideration the branch and it's delay
- * slot mentioned above.
- *
- * Sometimes we need to emit a branch earlier in the code
- * sequence. And in these situations we adjust "destination"
- * to accommodate this difference. For example, if we needed
- * to emit a branch (and it's delay slot) right before the
- * final instruction emitted for a BPF opcode, we'd use
- * "destination + 4" instead of just plain "destination" above.
- *
- * This is why you see all of these funny emit_branch() and
- * emit_jump() calls with adjusted offsets.
- */
-
-void bpf_jit_compile(struct bpf_prog *fp)
-{
- unsigned int cleanup_addr, proglen, oldproglen = 0;
- u32 temp[8], *prog, *func, seen = 0, pass;
- const struct sock_filter *filter = fp->insns;
- int i, flen = fp->len, pc_ret0 = -1;
- unsigned int *addrs;
- void *image;
-
- if (!bpf_jit_enable)
- return;
-
- addrs = kmalloc(flen * sizeof(*addrs), GFP_KERNEL);
- if (addrs == NULL)
- return;
-
- /* Before first pass, make a rough estimation of addrs[]
- * each bpf instruction is translated to less than 64 bytes
- */
- for (proglen = 0, i = 0; i < flen; i++) {
- proglen += 64;
- addrs[i] = proglen;
- }
- cleanup_addr = proglen; /* epilogue address */
- image = NULL;
- for (pass = 0; pass < 10; pass++) {
- u8 seen_or_pass0 = (pass == 0) ? (SEEN_XREG | SEEN_DATAREF | SEEN_MEM) : seen;
-
- /* no prologue/epilogue for trivial filters (RET something) */
- proglen = 0;
- prog = temp;
-
- /* Prologue */
- if (seen_or_pass0) {
- if (seen_or_pass0 & SEEN_MEM) {
- unsigned int sz = BASE_STACKFRAME;
- sz += BPF_MEMWORDS * sizeof(u32);
- emit_alloc_stack(sz);
- }
-
- /* Make sure we dont leek kernel memory. */
- if (seen_or_pass0 & SEEN_XREG)
- emit_clear(r_X);
-
- /* If this filter needs to access skb data,
- * load %o4 and %o5 with:
- * %o4 = skb->len - skb->data_len
- * %o5 = skb->data
- * And also back up %o7 into r_saved_O7 so we can
- * invoke the stubs using 'call'.
- */
- if (seen_or_pass0 & SEEN_DATAREF) {
- emit_load32(r_SKB, struct sk_buff, len, r_HEADLEN);
- emit_load32(r_SKB, struct sk_buff, data_len, r_TMP);
- emit_sub(r_HEADLEN, r_TMP, r_HEADLEN);
- emit_loadptr(r_SKB, struct sk_buff, data, r_SKB_DATA);
- }
- }
- emit_reg_move(O7, r_saved_O7);
-
- /* Make sure we dont leak kernel information to the user. */
- if (bpf_needs_clear_a(&filter[0]))
- emit_clear(r_A); /* A = 0 */
-
- for (i = 0; i < flen; i++) {
- unsigned int K = filter[i].k;
- unsigned int t_offset;
- unsigned int f_offset;
- u32 t_op, f_op;
- u16 code = bpf_anc_helper(&filter[i]);
- int ilen;
-
- switch (code) {
- case BPF_ALU | BPF_ADD | BPF_X: /* A += X; */
- emit_alu_X(ADD);
- break;
- case BPF_ALU | BPF_ADD | BPF_K: /* A += K; */
- emit_alu_K(ADD, K);
- break;
- case BPF_ALU | BPF_SUB | BPF_X: /* A -= X; */
- emit_alu_X(SUB);
- break;
- case BPF_ALU | BPF_SUB | BPF_K: /* A -= K */
- emit_alu_K(SUB, K);
- break;
- case BPF_ALU | BPF_AND | BPF_X: /* A &= X */
- emit_alu_X(AND);
- break;
- case BPF_ALU | BPF_AND | BPF_K: /* A &= K */
- emit_alu_K(AND, K);
- break;
- case BPF_ALU | BPF_OR | BPF_X: /* A |= X */
- emit_alu_X(OR);
- break;
- case BPF_ALU | BPF_OR | BPF_K: /* A |= K */
- emit_alu_K(OR, K);
- break;
- case BPF_ANC | SKF_AD_ALU_XOR_X: /* A ^= X; */
- case BPF_ALU | BPF_XOR | BPF_X:
- emit_alu_X(XOR);
- break;
- case BPF_ALU | BPF_XOR | BPF_K: /* A ^= K */
- emit_alu_K(XOR, K);
- break;
- case BPF_ALU | BPF_LSH | BPF_X: /* A <<= X */
- emit_alu_X(SLL);
- break;
- case BPF_ALU | BPF_LSH | BPF_K: /* A <<= K */
- emit_alu_K(SLL, K);
- break;
- case BPF_ALU | BPF_RSH | BPF_X: /* A >>= X */
- emit_alu_X(SRL);
- break;
- case BPF_ALU | BPF_RSH | BPF_K: /* A >>= K */
- emit_alu_K(SRL, K);
- break;
- case BPF_ALU | BPF_MUL | BPF_X: /* A *= X; */
- emit_alu_X(MUL);
- break;
- case BPF_ALU | BPF_MUL | BPF_K: /* A *= K */
- emit_alu_K(MUL, K);
- break;
- case BPF_ALU | BPF_DIV | BPF_K: /* A /= K with K != 0*/
- if (K == 1)
- break;
- emit_write_y(G0);
-#ifdef CONFIG_SPARC32
- /* The Sparc v8 architecture requires
- * three instructions between a %y
- * register write and the first use.
- */
- emit_nop();
- emit_nop();
- emit_nop();
-#endif
- emit_alu_K(DIV, K);
- break;
- case BPF_ALU | BPF_DIV | BPF_X: /* A /= X; */
- emit_cmpi(r_X, 0);
- if (pc_ret0 > 0) {
- t_offset = addrs[pc_ret0 - 1];
-#ifdef CONFIG_SPARC32
- emit_branch(BE, t_offset + 20);
-#else
- emit_branch(BE, t_offset + 8);
-#endif
- emit_nop(); /* delay slot */
- } else {
- emit_branch_off(BNE, 16);
- emit_nop();
-#ifdef CONFIG_SPARC32
- emit_jump(cleanup_addr + 20);
-#else
- emit_jump(cleanup_addr + 8);
-#endif
- emit_clear(r_A);
- }
- emit_write_y(G0);
-#ifdef CONFIG_SPARC32
- /* The Sparc v8 architecture requires
- * three instructions between a %y
- * register write and the first use.
- */
- emit_nop();
- emit_nop();
- emit_nop();
-#endif
- emit_alu_X(DIV);
- break;
- case BPF_ALU | BPF_NEG:
- emit_neg();
- break;
- case BPF_RET | BPF_K:
- if (!K) {
- if (pc_ret0 == -1)
- pc_ret0 = i;
- emit_clear(r_A);
- } else {
- emit_loadimm(K, r_A);
- }
- /* Fallthrough */
- case BPF_RET | BPF_A:
- if (seen_or_pass0) {
- if (i != flen - 1) {
- emit_jump(cleanup_addr);
- emit_nop();
- break;
- }
- if (seen_or_pass0 & SEEN_MEM) {
- unsigned int sz = BASE_STACKFRAME;
- sz += BPF_MEMWORDS * sizeof(u32);
- emit_release_stack(sz);
- }
- }
- /* jmpl %r_saved_O7 + 8, %g0 */
- emit_jmpl(r_saved_O7, 8, G0);
- emit_reg_move(r_A, O0); /* delay slot */
- break;
- case BPF_MISC | BPF_TAX:
- seen |= SEEN_XREG;
- emit_reg_move(r_A, r_X);
- break;
- case BPF_MISC | BPF_TXA:
- seen |= SEEN_XREG;
- emit_reg_move(r_X, r_A);
- break;
- case BPF_ANC | SKF_AD_CPU:
- emit_load_cpu(r_A);
- break;
- case BPF_ANC | SKF_AD_PROTOCOL:
- emit_skb_load16(protocol, r_A);
- break;
- case BPF_ANC | SKF_AD_PKTTYPE:
- __emit_skb_load8(__pkt_type_offset, r_A);
- emit_andi(r_A, PKT_TYPE_MAX, r_A);
- emit_alu_K(SRL, 5);
- break;
- case BPF_ANC | SKF_AD_IFINDEX:
- emit_skb_loadptr(dev, r_A);
- emit_cmpi(r_A, 0);
- emit_branch(BE_PTR, cleanup_addr + 4);
- emit_nop();
- emit_load32(r_A, struct net_device, ifindex, r_A);
- break;
- case BPF_ANC | SKF_AD_MARK:
- emit_skb_load32(mark, r_A);
- break;
- case BPF_ANC | SKF_AD_QUEUE:
- emit_skb_load16(queue_mapping, r_A);
- break;
- case BPF_ANC | SKF_AD_HATYPE:
- emit_skb_loadptr(dev, r_A);
- emit_cmpi(r_A, 0);
- emit_branch(BE_PTR, cleanup_addr + 4);
- emit_nop();
- emit_load16(r_A, struct net_device, type, r_A);
- break;
- case BPF_ANC | SKF_AD_RXHASH:
- emit_skb_load32(hash, r_A);
- break;
- case BPF_ANC | SKF_AD_VLAN_TAG:
- case BPF_ANC | SKF_AD_VLAN_TAG_PRESENT:
- emit_skb_load16(vlan_tci, r_A);
- if (code != (BPF_ANC | SKF_AD_VLAN_TAG)) {
- emit_alu_K(SRL, 12);
- emit_andi(r_A, 1, r_A);
- } else {
- emit_loadimm(~VLAN_TAG_PRESENT, r_TMP);
- emit_and(r_A, r_TMP, r_A);
- }
- break;
- case BPF_LD | BPF_W | BPF_LEN:
- emit_skb_load32(len, r_A);
- break;
- case BPF_LDX | BPF_W | BPF_LEN:
- emit_skb_load32(len, r_X);
- break;
- case BPF_LD | BPF_IMM:
- emit_loadimm(K, r_A);
- break;
- case BPF_LDX | BPF_IMM:
- emit_loadimm(K, r_X);
- break;
- case BPF_LD | BPF_MEM:
- seen |= SEEN_MEM;
- emit_ldmem(K * 4, r_A);
- break;
- case BPF_LDX | BPF_MEM:
- seen |= SEEN_MEM | SEEN_XREG;
- emit_ldmem(K * 4, r_X);
- break;
- case BPF_ST:
- seen |= SEEN_MEM;
- emit_stmem(K * 4, r_A);
- break;
- case BPF_STX:
- seen |= SEEN_MEM | SEEN_XREG;
- emit_stmem(K * 4, r_X);
- break;
-
-#define CHOOSE_LOAD_FUNC(K, func) \
- ((int)K < 0 ? ((int)K >= SKF_LL_OFF ? func##_negative_offset : func) : func##_positive_offset)
-
- case BPF_LD | BPF_W | BPF_ABS:
- func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_word);
-common_load: seen |= SEEN_DATAREF;
- emit_loadimm(K, r_OFF);
- emit_call(func);
- break;
- case BPF_LD | BPF_H | BPF_ABS:
- func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_half);
- goto common_load;
- case BPF_LD | BPF_B | BPF_ABS:
- func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_byte);
- goto common_load;
- case BPF_LDX | BPF_B | BPF_MSH:
- func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_byte_msh);
- goto common_load;
- case BPF_LD | BPF_W | BPF_IND:
- func = bpf_jit_load_word;
-common_load_ind: seen |= SEEN_DATAREF | SEEN_XREG;
- if (K) {
- if (is_simm13(K)) {
- emit_addi(r_X, K, r_OFF);
- } else {
- emit_loadimm(K, r_TMP);
- emit_add(r_X, r_TMP, r_OFF);
- }
- } else {
- emit_reg_move(r_X, r_OFF);
- }
- emit_call(func);
- break;
- case BPF_LD | BPF_H | BPF_IND:
- func = bpf_jit_load_half;
- goto common_load_ind;
- case BPF_LD | BPF_B | BPF_IND:
- func = bpf_jit_load_byte;
- goto common_load_ind;
- case BPF_JMP | BPF_JA:
- emit_jump(addrs[i + K]);
- emit_nop();
- break;
-
-#define COND_SEL(CODE, TOP, FOP) \
- case CODE: \
- t_op = TOP; \
- f_op = FOP; \
- goto cond_branch
-
- COND_SEL(BPF_JMP | BPF_JGT | BPF_K, BGU, BLEU);
- COND_SEL(BPF_JMP | BPF_JGE | BPF_K, BGEU, BLU);
- COND_SEL(BPF_JMP | BPF_JEQ | BPF_K, BE, BNE);
- COND_SEL(BPF_JMP | BPF_JSET | BPF_K, BNE, BE);
- COND_SEL(BPF_JMP | BPF_JGT | BPF_X, BGU, BLEU);
- COND_SEL(BPF_JMP | BPF_JGE | BPF_X, BGEU, BLU);
- COND_SEL(BPF_JMP | BPF_JEQ | BPF_X, BE, BNE);
- COND_SEL(BPF_JMP | BPF_JSET | BPF_X, BNE, BE);
-
-cond_branch: f_offset = addrs[i + filter[i].jf];
- t_offset = addrs[i + filter[i].jt];
-
- /* same targets, can avoid doing the test :) */
- if (filter[i].jt == filter[i].jf) {
- emit_jump(t_offset);
- emit_nop();
- break;
- }
-
- switch (code) {
- case BPF_JMP | BPF_JGT | BPF_X:
- case BPF_JMP | BPF_JGE | BPF_X:
- case BPF_JMP | BPF_JEQ | BPF_X:
- seen |= SEEN_XREG;
- emit_cmp(r_A, r_X);
- break;
- case BPF_JMP | BPF_JSET | BPF_X:
- seen |= SEEN_XREG;
- emit_btst(r_A, r_X);
- break;
- case BPF_JMP | BPF_JEQ | BPF_K:
- case BPF_JMP | BPF_JGT | BPF_K:
- case BPF_JMP | BPF_JGE | BPF_K:
- if (is_simm13(K)) {
- emit_cmpi(r_A, K);
- } else {
- emit_loadimm(K, r_TMP);
- emit_cmp(r_A, r_TMP);
- }
- break;
- case BPF_JMP | BPF_JSET | BPF_K:
- if (is_simm13(K)) {
- emit_btsti(r_A, K);
- } else {
- emit_loadimm(K, r_TMP);
- emit_btst(r_A, r_TMP);
- }
- break;
- }
- if (filter[i].jt != 0) {
- if (filter[i].jf)
- t_offset += 8;
- emit_branch(t_op, t_offset);
- emit_nop(); /* delay slot */
- if (filter[i].jf) {
- emit_jump(f_offset);
- emit_nop();
- }
- break;
- }
- emit_branch(f_op, f_offset);
- emit_nop(); /* delay slot */
- break;
-
- default:
- /* hmm, too complex filter, give up with jit compiler */
- goto out;
- }
- ilen = (void *) prog - (void *) temp;
- if (image) {
- if (unlikely(proglen + ilen > oldproglen)) {
- pr_err("bpb_jit_compile fatal error\n");
- kfree(addrs);
- module_memfree(image);
- return;
- }
- memcpy(image + proglen, temp, ilen);
- }
- proglen += ilen;
- addrs[i] = proglen;
- prog = temp;
- }
- /* last bpf instruction is always a RET :
- * use it to give the cleanup instruction(s) addr
- */
- cleanup_addr = proglen - 8; /* jmpl; mov r_A,%o0; */
- if (seen_or_pass0 & SEEN_MEM)
- cleanup_addr -= 4; /* add %sp, X, %sp; */
-
- if (image) {
- if (proglen != oldproglen)
- pr_err("bpb_jit_compile proglen=%u != oldproglen=%u\n",
- proglen, oldproglen);
- break;
- }
- if (proglen == oldproglen) {
- image = module_alloc(proglen);
- if (!image)
- goto out;
- }
- oldproglen = proglen;
- }
-
- if (bpf_jit_enable > 1)
- bpf_jit_dump(flen, proglen, pass + 1, image);
-
- if (image) {
- bpf_flush_icache(image, image + proglen);
- fp->bpf_func = (void *)image;
- fp->jited = 1;
- }
-out:
- kfree(addrs);
- return;
-}
-
-void bpf_jit_free(struct bpf_prog *fp)
-{
- if (fp->jited)
- module_memfree(fp->bpf_func);
-
- bpf_prog_unlock_free(fp);
-}
diff --git a/arch/sparc/net/bpf_jit_comp_32.c b/arch/sparc/net/bpf_jit_comp_32.c
new file mode 100644
index 0000000..83fc41d
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_comp_32.c
@@ -0,0 +1,815 @@
+#include <linux/moduleloader.h>
+#include <linux/workqueue.h>
+#include <linux/netdevice.h>
+#include <linux/filter.h>
+#include <linux/cache.h>
+#include <linux/if_vlan.h>
+
+#include <asm/cacheflush.h>
+#include <asm/ptrace.h>
+
+#include "bpf_jit_32.h"
+
+int bpf_jit_enable __read_mostly;
+
+static inline bool is_simm13(unsigned int value)
+{
+ return value + 0x1000 < 0x2000;
+}
+
+static void bpf_flush_icache(void *start_, void *end_)
+{
+#ifdef CONFIG_SPARC64
+ /* Cheetah's I-cache is fully coherent. */
+ if (tlb_type == spitfire) {
+ unsigned long start = (unsigned long) start_;
+ unsigned long end = (unsigned long) end_;
+
+ start &= ~7UL;
+ end = (end + 7UL) & ~7UL;
+ while (start < end) {
+ flushi(start);
+ start += 32;
+ }
+ }
+#endif
+}
+
+#define SEEN_DATAREF 1 /* might call external helpers */
+#define SEEN_XREG 2 /* ebx is used */
+#define SEEN_MEM 4 /* use mem[] for temporary storage */
+
+#define S13(X) ((X) & 0x1fff)
+#define IMMED 0x00002000
+#define RD(X) ((X) << 25)
+#define RS1(X) ((X) << 14)
+#define RS2(X) ((X))
+#define OP(X) ((X) << 30)
+#define OP2(X) ((X) << 22)
+#define OP3(X) ((X) << 19)
+#define COND(X) ((X) << 25)
+#define F1(X) OP(X)
+#define F2(X, Y) (OP(X) | OP2(Y))
+#define F3(X, Y) (OP(X) | OP3(Y))
+
+#define CONDN COND(0x0)
+#define CONDE COND(0x1)
+#define CONDLE COND(0x2)
+#define CONDL COND(0x3)
+#define CONDLEU COND(0x4)
+#define CONDCS COND(0x5)
+#define CONDNEG COND(0x6)
+#define CONDVC COND(0x7)
+#define CONDA COND(0x8)
+#define CONDNE COND(0x9)
+#define CONDG COND(0xa)
+#define CONDGE COND(0xb)
+#define CONDGU COND(0xc)
+#define CONDCC COND(0xd)
+#define CONDPOS COND(0xe)
+#define CONDVS COND(0xf)
+
+#define CONDGEU CONDCC
+#define CONDLU CONDCS
+
+#define WDISP22(X) (((X) >> 2) & 0x3fffff)
+
+#define BA (F2(0, 2) | CONDA)
+#define BGU (F2(0, 2) | CONDGU)
+#define BLEU (F2(0, 2) | CONDLEU)
+#define BGEU (F2(0, 2) | CONDGEU)
+#define BLU (F2(0, 2) | CONDLU)
+#define BE (F2(0, 2) | CONDE)
+#define BNE (F2(0, 2) | CONDNE)
+
+#ifdef CONFIG_SPARC64
+#define BE_PTR (F2(0, 1) | CONDE | (2 << 20))
+#else
+#define BE_PTR BE
+#endif
+
+#define SETHI(K, REG) \
+ (F2(0, 0x4) | RD(REG) | (((K) >> 10) & 0x3fffff))
+#define OR_LO(K, REG) \
+ (F3(2, 0x02) | IMMED | RS1(REG) | ((K) & 0x3ff) | RD(REG))
+
+#define ADD F3(2, 0x00)
+#define AND F3(2, 0x01)
+#define ANDCC F3(2, 0x11)
+#define OR F3(2, 0x02)
+#define XOR F3(2, 0x03)
+#define SUB F3(2, 0x04)
+#define SUBCC F3(2, 0x14)
+#define MUL F3(2, 0x0a) /* umul */
+#define DIV F3(2, 0x0e) /* udiv */
+#define SLL F3(2, 0x25)
+#define SRL F3(2, 0x26)
+#define JMPL F3(2, 0x38)
+#define CALL F1(1)
+#define BR F2(0, 0x01)
+#define RD_Y F3(2, 0x28)
+#define WR_Y F3(2, 0x30)
+
+#define LD32 F3(3, 0x00)
+#define LD8 F3(3, 0x01)
+#define LD16 F3(3, 0x02)
+#define LD64 F3(3, 0x0b)
+#define ST32 F3(3, 0x04)
+
+#ifdef CONFIG_SPARC64
+#define LDPTR LD64
+#define BASE_STACKFRAME 176
+#else
+#define LDPTR LD32
+#define BASE_STACKFRAME 96
+#endif
+
+#define LD32I (LD32 | IMMED)
+#define LD8I (LD8 | IMMED)
+#define LD16I (LD16 | IMMED)
+#define LD64I (LD64 | IMMED)
+#define LDPTRI (LDPTR | IMMED)
+#define ST32I (ST32 | IMMED)
+
+#define emit_nop() \
+do { \
+ *prog++ = SETHI(0, G0); \
+} while (0)
+
+#define emit_neg() \
+do { /* sub %g0, r_A, r_A */ \
+ *prog++ = SUB | RS1(G0) | RS2(r_A) | RD(r_A); \
+} while (0)
+
+#define emit_reg_move(FROM, TO) \
+do { /* or %g0, FROM, TO */ \
+ *prog++ = OR | RS1(G0) | RS2(FROM) | RD(TO); \
+} while (0)
+
+#define emit_clear(REG) \
+do { /* or %g0, %g0, REG */ \
+ *prog++ = OR | RS1(G0) | RS2(G0) | RD(REG); \
+} while (0)
+
+#define emit_set_const(K, REG) \
+do { /* sethi %hi(K), REG */ \
+ *prog++ = SETHI(K, REG); \
+ /* or REG, %lo(K), REG */ \
+ *prog++ = OR_LO(K, REG); \
+} while (0)
+
+ /* Emit
+ *
+ * OP r_A, r_X, r_A
+ */
+#define emit_alu_X(OPCODE) \
+do { \
+ seen |= SEEN_XREG; \
+ *prog++ = OPCODE | RS1(r_A) | RS2(r_X) | RD(r_A); \
+} while (0)
+
+ /* Emit either:
+ *
+ * OP r_A, K, r_A
+ *
+ * or
+ *
+ * sethi %hi(K), r_TMP
+ * or r_TMP, %lo(K), r_TMP
+ * OP r_A, r_TMP, r_A
+ *
+ * depending upon whether K fits in a signed 13-bit
+ * immediate instruction field. Emit nothing if K
+ * is zero.
+ */
+#define emit_alu_K(OPCODE, K) \
+do { \
+ if (K || OPCODE == AND || OPCODE == MUL) { \
+ unsigned int _insn = OPCODE; \
+ _insn |= RS1(r_A) | RD(r_A); \
+ if (is_simm13(K)) { \
+ *prog++ = _insn | IMMED | S13(K); \
+ } else { \
+ emit_set_const(K, r_TMP); \
+ *prog++ = _insn | RS2(r_TMP); \
+ } \
+ } \
+} while (0)
+
+#define emit_loadimm(K, DEST) \
+do { \
+ if (is_simm13(K)) { \
+ /* or %g0, K, DEST */ \
+ *prog++ = OR | IMMED | RS1(G0) | S13(K) | RD(DEST); \
+ } else { \
+ emit_set_const(K, DEST); \
+ } \
+} while (0)
+
+#define emit_loadptr(BASE, STRUCT, FIELD, DEST) \
+do { unsigned int _off = offsetof(STRUCT, FIELD); \
+ BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(void *)); \
+ *prog++ = LDPTRI | RS1(BASE) | S13(_off) | RD(DEST); \
+} while (0)
+
+#define emit_load32(BASE, STRUCT, FIELD, DEST) \
+do { unsigned int _off = offsetof(STRUCT, FIELD); \
+ BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(u32)); \
+ *prog++ = LD32I | RS1(BASE) | S13(_off) | RD(DEST); \
+} while (0)
+
+#define emit_load16(BASE, STRUCT, FIELD, DEST) \
+do { unsigned int _off = offsetof(STRUCT, FIELD); \
+ BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(u16)); \
+ *prog++ = LD16I | RS1(BASE) | S13(_off) | RD(DEST); \
+} while (0)
+
+#define __emit_load8(BASE, STRUCT, FIELD, DEST) \
+do { unsigned int _off = offsetof(STRUCT, FIELD); \
+ *prog++ = LD8I | RS1(BASE) | S13(_off) | RD(DEST); \
+} while (0)
+
+#define emit_load8(BASE, STRUCT, FIELD, DEST) \
+do { BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(u8)); \
+ __emit_load8(BASE, STRUCT, FIELD, DEST); \
+} while (0)
+
+#ifdef CONFIG_SPARC64
+#define BIAS (STACK_BIAS - 4)
+#else
+#define BIAS (-4)
+#endif
+
+#define emit_ldmem(OFF, DEST) \
+do { *prog++ = LD32I | RS1(SP) | S13(BIAS - (OFF)) | RD(DEST); \
+} while (0)
+
+#define emit_stmem(OFF, SRC) \
+do { *prog++ = ST32I | RS1(SP) | S13(BIAS - (OFF)) | RD(SRC); \
+} while (0)
+
+#ifdef CONFIG_SMP
+#ifdef CONFIG_SPARC64
+#define emit_load_cpu(REG) \
+ emit_load16(G6, struct thread_info, cpu, REG)
+#else
+#define emit_load_cpu(REG) \
+ emit_load32(G6, struct thread_info, cpu, REG)
+#endif
+#else
+#define emit_load_cpu(REG) emit_clear(REG)
+#endif
+
+#define emit_skb_loadptr(FIELD, DEST) \
+ emit_loadptr(r_SKB, struct sk_buff, FIELD, DEST)
+#define emit_skb_load32(FIELD, DEST) \
+ emit_load32(r_SKB, struct sk_buff, FIELD, DEST)
+#define emit_skb_load16(FIELD, DEST) \
+ emit_load16(r_SKB, struct sk_buff, FIELD, DEST)
+#define __emit_skb_load8(FIELD, DEST) \
+ __emit_load8(r_SKB, struct sk_buff, FIELD, DEST)
+#define emit_skb_load8(FIELD, DEST) \
+ emit_load8(r_SKB, struct sk_buff, FIELD, DEST)
+
+#define emit_jmpl(BASE, IMM_OFF, LREG) \
+ *prog++ = (JMPL | IMMED | RS1(BASE) | S13(IMM_OFF) | RD(LREG))
+
+#define emit_call(FUNC) \
+do { void *_here = image + addrs[i] - 8; \
+ unsigned int _off = (void *)(FUNC) - _here; \
+ *prog++ = CALL | (((_off) >> 2) & 0x3fffffff); \
+ emit_nop(); \
+} while (0)
+
+#define emit_branch(BR_OPC, DEST) \
+do { unsigned int _here = addrs[i] - 8; \
+ *prog++ = BR_OPC | WDISP22((DEST) - _here); \
+} while (0)
+
+#define emit_branch_off(BR_OPC, OFF) \
+do { *prog++ = BR_OPC | WDISP22(OFF); \
+} while (0)
+
+#define emit_jump(DEST) emit_branch(BA, DEST)
+
+#define emit_read_y(REG) *prog++ = RD_Y | RD(REG)
+#define emit_write_y(REG) *prog++ = WR_Y | IMMED | RS1(REG) | S13(0)
+
+#define emit_cmp(R1, R2) \
+ *prog++ = (SUBCC | RS1(R1) | RS2(R2) | RD(G0))
+
+#define emit_cmpi(R1, IMM) \
+ *prog++ = (SUBCC | IMMED | RS1(R1) | S13(IMM) | RD(G0));
+
+#define emit_btst(R1, R2) \
+ *prog++ = (ANDCC | RS1(R1) | RS2(R2) | RD(G0))
+
+#define emit_btsti(R1, IMM) \
+ *prog++ = (ANDCC | IMMED | RS1(R1) | S13(IMM) | RD(G0));
+
+#define emit_sub(R1, R2, R3) \
+ *prog++ = (SUB | RS1(R1) | RS2(R2) | RD(R3))
+
+#define emit_subi(R1, IMM, R3) \
+ *prog++ = (SUB | IMMED | RS1(R1) | S13(IMM) | RD(R3))
+
+#define emit_add(R1, R2, R3) \
+ *prog++ = (ADD | RS1(R1) | RS2(R2) | RD(R3))
+
+#define emit_addi(R1, IMM, R3) \
+ *prog++ = (ADD | IMMED | RS1(R1) | S13(IMM) | RD(R3))
+
+#define emit_and(R1, R2, R3) \
+ *prog++ = (AND | RS1(R1) | RS2(R2) | RD(R3))
+
+#define emit_andi(R1, IMM, R3) \
+ *prog++ = (AND | IMMED | RS1(R1) | S13(IMM) | RD(R3))
+
+#define emit_alloc_stack(SZ) \
+ *prog++ = (SUB | IMMED | RS1(SP) | S13(SZ) | RD(SP))
+
+#define emit_release_stack(SZ) \
+ *prog++ = (ADD | IMMED | RS1(SP) | S13(SZ) | RD(SP))
+
+/* A note about branch offset calculations. The addrs[] array,
+ * indexed by BPF instruction, records the address after all the
+ * sparc instructions emitted for that BPF instruction.
+ *
+ * The most common case is to emit a branch at the end of such
+ * a code sequence. So this would be two instructions, the
+ * branch and it's delay slot.
+ *
+ * Therefore by default the branch emitters calculate the branch
+ * offset field as:
+ *
+ * destination - (addrs[i] - 8)
+ *
+ * This "addrs[i] - 8" is the address of the branch itself or
+ * what "." would be in assembler notation. The "8" part is
+ * how we take into consideration the branch and it's delay
+ * slot mentioned above.
+ *
+ * Sometimes we need to emit a branch earlier in the code
+ * sequence. And in these situations we adjust "destination"
+ * to accommodate this difference. For example, if we needed
+ * to emit a branch (and it's delay slot) right before the
+ * final instruction emitted for a BPF opcode, we'd use
+ * "destination + 4" instead of just plain "destination" above.
+ *
+ * This is why you see all of these funny emit_branch() and
+ * emit_jump() calls with adjusted offsets.
+ */
+
+void bpf_jit_compile(struct bpf_prog *fp)
+{
+ unsigned int cleanup_addr, proglen, oldproglen = 0;
+ u32 temp[8], *prog, *func, seen = 0, pass;
+ const struct sock_filter *filter = fp->insns;
+ int i, flen = fp->len, pc_ret0 = -1;
+ unsigned int *addrs;
+ void *image;
+
+ if (!bpf_jit_enable)
+ return;
+
+ addrs = kmalloc(flen * sizeof(*addrs), GFP_KERNEL);
+ if (addrs == NULL)
+ return;
+
+ /* Before first pass, make a rough estimation of addrs[]
+ * each bpf instruction is translated to less than 64 bytes
+ */
+ for (proglen = 0, i = 0; i < flen; i++) {
+ proglen += 64;
+ addrs[i] = proglen;
+ }
+ cleanup_addr = proglen; /* epilogue address */
+ image = NULL;
+ for (pass = 0; pass < 10; pass++) {
+ u8 seen_or_pass0 = (pass == 0) ? (SEEN_XREG | SEEN_DATAREF | SEEN_MEM) : seen;
+
+ /* no prologue/epilogue for trivial filters (RET something) */
+ proglen = 0;
+ prog = temp;
+
+ /* Prologue */
+ if (seen_or_pass0) {
+ if (seen_or_pass0 & SEEN_MEM) {
+ unsigned int sz = BASE_STACKFRAME;
+ sz += BPF_MEMWORDS * sizeof(u32);
+ emit_alloc_stack(sz);
+ }
+
+ /* Make sure we dont leek kernel memory. */
+ if (seen_or_pass0 & SEEN_XREG)
+ emit_clear(r_X);
+
+ /* If this filter needs to access skb data,
+ * load %o4 and %o5 with:
+ * %o4 = skb->len - skb->data_len
+ * %o5 = skb->data
+ * And also back up %o7 into r_saved_O7 so we can
+ * invoke the stubs using 'call'.
+ */
+ if (seen_or_pass0 & SEEN_DATAREF) {
+ emit_load32(r_SKB, struct sk_buff, len, r_HEADLEN);
+ emit_load32(r_SKB, struct sk_buff, data_len, r_TMP);
+ emit_sub(r_HEADLEN, r_TMP, r_HEADLEN);
+ emit_loadptr(r_SKB, struct sk_buff, data, r_SKB_DATA);
+ }
+ }
+ emit_reg_move(O7, r_saved_O7);
+
+ /* Make sure we dont leak kernel information to the user. */
+ if (bpf_needs_clear_a(&filter[0]))
+ emit_clear(r_A); /* A = 0 */
+
+ for (i = 0; i < flen; i++) {
+ unsigned int K = filter[i].k;
+ unsigned int t_offset;
+ unsigned int f_offset;
+ u32 t_op, f_op;
+ u16 code = bpf_anc_helper(&filter[i]);
+ int ilen;
+
+ switch (code) {
+ case BPF_ALU | BPF_ADD | BPF_X: /* A += X; */
+ emit_alu_X(ADD);
+ break;
+ case BPF_ALU | BPF_ADD | BPF_K: /* A += K; */
+ emit_alu_K(ADD, K);
+ break;
+ case BPF_ALU | BPF_SUB | BPF_X: /* A -= X; */
+ emit_alu_X(SUB);
+ break;
+ case BPF_ALU | BPF_SUB | BPF_K: /* A -= K */
+ emit_alu_K(SUB, K);
+ break;
+ case BPF_ALU | BPF_AND | BPF_X: /* A &= X */
+ emit_alu_X(AND);
+ break;
+ case BPF_ALU | BPF_AND | BPF_K: /* A &= K */
+ emit_alu_K(AND, K);
+ break;
+ case BPF_ALU | BPF_OR | BPF_X: /* A |= X */
+ emit_alu_X(OR);
+ break;
+ case BPF_ALU | BPF_OR | BPF_K: /* A |= K */
+ emit_alu_K(OR, K);
+ break;
+ case BPF_ANC | SKF_AD_ALU_XOR_X: /* A ^= X; */
+ case BPF_ALU | BPF_XOR | BPF_X:
+ emit_alu_X(XOR);
+ break;
+ case BPF_ALU | BPF_XOR | BPF_K: /* A ^= K */
+ emit_alu_K(XOR, K);
+ break;
+ case BPF_ALU | BPF_LSH | BPF_X: /* A <<= X */
+ emit_alu_X(SLL);
+ break;
+ case BPF_ALU | BPF_LSH | BPF_K: /* A <<= K */
+ emit_alu_K(SLL, K);
+ break;
+ case BPF_ALU | BPF_RSH | BPF_X: /* A >>= X */
+ emit_alu_X(SRL);
+ break;
+ case BPF_ALU | BPF_RSH | BPF_K: /* A >>= K */
+ emit_alu_K(SRL, K);
+ break;
+ case BPF_ALU | BPF_MUL | BPF_X: /* A *= X; */
+ emit_alu_X(MUL);
+ break;
+ case BPF_ALU | BPF_MUL | BPF_K: /* A *= K */
+ emit_alu_K(MUL, K);
+ break;
+ case BPF_ALU | BPF_DIV | BPF_K: /* A /= K with K != 0*/
+ if (K == 1)
+ break;
+ emit_write_y(G0);
+#ifdef CONFIG_SPARC32
+ /* The Sparc v8 architecture requires
+ * three instructions between a %y
+ * register write and the first use.
+ */
+ emit_nop();
+ emit_nop();
+ emit_nop();
+#endif
+ emit_alu_K(DIV, K);
+ break;
+ case BPF_ALU | BPF_DIV | BPF_X: /* A /= X; */
+ emit_cmpi(r_X, 0);
+ if (pc_ret0 > 0) {
+ t_offset = addrs[pc_ret0 - 1];
+#ifdef CONFIG_SPARC32
+ emit_branch(BE, t_offset + 20);
+#else
+ emit_branch(BE, t_offset + 8);
+#endif
+ emit_nop(); /* delay slot */
+ } else {
+ emit_branch_off(BNE, 16);
+ emit_nop();
+#ifdef CONFIG_SPARC32
+ emit_jump(cleanup_addr + 20);
+#else
+ emit_jump(cleanup_addr + 8);
+#endif
+ emit_clear(r_A);
+ }
+ emit_write_y(G0);
+#ifdef CONFIG_SPARC32
+ /* The Sparc v8 architecture requires
+ * three instructions between a %y
+ * register write and the first use.
+ */
+ emit_nop();
+ emit_nop();
+ emit_nop();
+#endif
+ emit_alu_X(DIV);
+ break;
+ case BPF_ALU | BPF_NEG:
+ emit_neg();
+ break;
+ case BPF_RET | BPF_K:
+ if (!K) {
+ if (pc_ret0 == -1)
+ pc_ret0 = i;
+ emit_clear(r_A);
+ } else {
+ emit_loadimm(K, r_A);
+ }
+ /* Fallthrough */
+ case BPF_RET | BPF_A:
+ if (seen_or_pass0) {
+ if (i != flen - 1) {
+ emit_jump(cleanup_addr);
+ emit_nop();
+ break;
+ }
+ if (seen_or_pass0 & SEEN_MEM) {
+ unsigned int sz = BASE_STACKFRAME;
+ sz += BPF_MEMWORDS * sizeof(u32);
+ emit_release_stack(sz);
+ }
+ }
+ /* jmpl %r_saved_O7 + 8, %g0 */
+ emit_jmpl(r_saved_O7, 8, G0);
+ emit_reg_move(r_A, O0); /* delay slot */
+ break;
+ case BPF_MISC | BPF_TAX:
+ seen |= SEEN_XREG;
+ emit_reg_move(r_A, r_X);
+ break;
+ case BPF_MISC | BPF_TXA:
+ seen |= SEEN_XREG;
+ emit_reg_move(r_X, r_A);
+ break;
+ case BPF_ANC | SKF_AD_CPU:
+ emit_load_cpu(r_A);
+ break;
+ case BPF_ANC | SKF_AD_PROTOCOL:
+ emit_skb_load16(protocol, r_A);
+ break;
+ case BPF_ANC | SKF_AD_PKTTYPE:
+ __emit_skb_load8(__pkt_type_offset, r_A);
+ emit_andi(r_A, PKT_TYPE_MAX, r_A);
+ emit_alu_K(SRL, 5);
+ break;
+ case BPF_ANC | SKF_AD_IFINDEX:
+ emit_skb_loadptr(dev, r_A);
+ emit_cmpi(r_A, 0);
+ emit_branch(BE_PTR, cleanup_addr + 4);
+ emit_nop();
+ emit_load32(r_A, struct net_device, ifindex, r_A);
+ break;
+ case BPF_ANC | SKF_AD_MARK:
+ emit_skb_load32(mark, r_A);
+ break;
+ case BPF_ANC | SKF_AD_QUEUE:
+ emit_skb_load16(queue_mapping, r_A);
+ break;
+ case BPF_ANC | SKF_AD_HATYPE:
+ emit_skb_loadptr(dev, r_A);
+ emit_cmpi(r_A, 0);
+ emit_branch(BE_PTR, cleanup_addr + 4);
+ emit_nop();
+ emit_load16(r_A, struct net_device, type, r_A);
+ break;
+ case BPF_ANC | SKF_AD_RXHASH:
+ emit_skb_load32(hash, r_A);
+ break;
+ case BPF_ANC | SKF_AD_VLAN_TAG:
+ case BPF_ANC | SKF_AD_VLAN_TAG_PRESENT:
+ emit_skb_load16(vlan_tci, r_A);
+ if (code != (BPF_ANC | SKF_AD_VLAN_TAG)) {
+ emit_alu_K(SRL, 12);
+ emit_andi(r_A, 1, r_A);
+ } else {
+ emit_loadimm(~VLAN_TAG_PRESENT, r_TMP);
+ emit_and(r_A, r_TMP, r_A);
+ }
+ break;
+ case BPF_LD | BPF_W | BPF_LEN:
+ emit_skb_load32(len, r_A);
+ break;
+ case BPF_LDX | BPF_W | BPF_LEN:
+ emit_skb_load32(len, r_X);
+ break;
+ case BPF_LD | BPF_IMM:
+ emit_loadimm(K, r_A);
+ break;
+ case BPF_LDX | BPF_IMM:
+ emit_loadimm(K, r_X);
+ break;
+ case BPF_LD | BPF_MEM:
+ seen |= SEEN_MEM;
+ emit_ldmem(K * 4, r_A);
+ break;
+ case BPF_LDX | BPF_MEM:
+ seen |= SEEN_MEM | SEEN_XREG;
+ emit_ldmem(K * 4, r_X);
+ break;
+ case BPF_ST:
+ seen |= SEEN_MEM;
+ emit_stmem(K * 4, r_A);
+ break;
+ case BPF_STX:
+ seen |= SEEN_MEM | SEEN_XREG;
+ emit_stmem(K * 4, r_X);
+ break;
+
+#define CHOOSE_LOAD_FUNC(K, func) \
+ ((int)K < 0 ? ((int)K >= SKF_LL_OFF ? func##_negative_offset : func) : func##_positive_offset)
+
+ case BPF_LD | BPF_W | BPF_ABS:
+ func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_word);
+common_load: seen |= SEEN_DATAREF;
+ emit_loadimm(K, r_OFF);
+ emit_call(func);
+ break;
+ case BPF_LD | BPF_H | BPF_ABS:
+ func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_half);
+ goto common_load;
+ case BPF_LD | BPF_B | BPF_ABS:
+ func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_byte);
+ goto common_load;
+ case BPF_LDX | BPF_B | BPF_MSH:
+ func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_byte_msh);
+ goto common_load;
+ case BPF_LD | BPF_W | BPF_IND:
+ func = bpf_jit_load_word;
+common_load_ind: seen |= SEEN_DATAREF | SEEN_XREG;
+ if (K) {
+ if (is_simm13(K)) {
+ emit_addi(r_X, K, r_OFF);
+ } else {
+ emit_loadimm(K, r_TMP);
+ emit_add(r_X, r_TMP, r_OFF);
+ }
+ } else {
+ emit_reg_move(r_X, r_OFF);
+ }
+ emit_call(func);
+ break;
+ case BPF_LD | BPF_H | BPF_IND:
+ func = bpf_jit_load_half;
+ goto common_load_ind;
+ case BPF_LD | BPF_B | BPF_IND:
+ func = bpf_jit_load_byte;
+ goto common_load_ind;
+ case BPF_JMP | BPF_JA:
+ emit_jump(addrs[i + K]);
+ emit_nop();
+ break;
+
+#define COND_SEL(CODE, TOP, FOP) \
+ case CODE: \
+ t_op = TOP; \
+ f_op = FOP; \
+ goto cond_branch
+
+ COND_SEL(BPF_JMP | BPF_JGT | BPF_K, BGU, BLEU);
+ COND_SEL(BPF_JMP | BPF_JGE | BPF_K, BGEU, BLU);
+ COND_SEL(BPF_JMP | BPF_JEQ | BPF_K, BE, BNE);
+ COND_SEL(BPF_JMP | BPF_JSET | BPF_K, BNE, BE);
+ COND_SEL(BPF_JMP | BPF_JGT | BPF_X, BGU, BLEU);
+ COND_SEL(BPF_JMP | BPF_JGE | BPF_X, BGEU, BLU);
+ COND_SEL(BPF_JMP | BPF_JEQ | BPF_X, BE, BNE);
+ COND_SEL(BPF_JMP | BPF_JSET | BPF_X, BNE, BE);
+
+cond_branch: f_offset = addrs[i + filter[i].jf];
+ t_offset = addrs[i + filter[i].jt];
+
+ /* same targets, can avoid doing the test :) */
+ if (filter[i].jt == filter[i].jf) {
+ emit_jump(t_offset);
+ emit_nop();
+ break;
+ }
+
+ switch (code) {
+ case BPF_JMP | BPF_JGT | BPF_X:
+ case BPF_JMP | BPF_JGE | BPF_X:
+ case BPF_JMP | BPF_JEQ | BPF_X:
+ seen |= SEEN_XREG;
+ emit_cmp(r_A, r_X);
+ break;
+ case BPF_JMP | BPF_JSET | BPF_X:
+ seen |= SEEN_XREG;
+ emit_btst(r_A, r_X);
+ break;
+ case BPF_JMP | BPF_JEQ | BPF_K:
+ case BPF_JMP | BPF_JGT | BPF_K:
+ case BPF_JMP | BPF_JGE | BPF_K:
+ if (is_simm13(K)) {
+ emit_cmpi(r_A, K);
+ } else {
+ emit_loadimm(K, r_TMP);
+ emit_cmp(r_A, r_TMP);
+ }
+ break;
+ case BPF_JMP | BPF_JSET | BPF_K:
+ if (is_simm13(K)) {
+ emit_btsti(r_A, K);
+ } else {
+ emit_loadimm(K, r_TMP);
+ emit_btst(r_A, r_TMP);
+ }
+ break;
+ }
+ if (filter[i].jt != 0) {
+ if (filter[i].jf)
+ t_offset += 8;
+ emit_branch(t_op, t_offset);
+ emit_nop(); /* delay slot */
+ if (filter[i].jf) {
+ emit_jump(f_offset);
+ emit_nop();
+ }
+ break;
+ }
+ emit_branch(f_op, f_offset);
+ emit_nop(); /* delay slot */
+ break;
+
+ default:
+ /* hmm, too complex filter, give up with jit compiler */
+ goto out;
+ }
+ ilen = (void *) prog - (void *) temp;
+ if (image) {
+ if (unlikely(proglen + ilen > oldproglen)) {
+ pr_err("bpb_jit_compile fatal error\n");
+ kfree(addrs);
+ module_memfree(image);
+ return;
+ }
+ memcpy(image + proglen, temp, ilen);
+ }
+ proglen += ilen;
+ addrs[i] = proglen;
+ prog = temp;
+ }
+ /* last bpf instruction is always a RET :
+ * use it to give the cleanup instruction(s) addr
+ */
+ cleanup_addr = proglen - 8; /* jmpl; mov r_A,%o0; */
+ if (seen_or_pass0 & SEEN_MEM)
+ cleanup_addr -= 4; /* add %sp, X, %sp; */
+
+ if (image) {
+ if (proglen != oldproglen)
+ pr_err("bpb_jit_compile proglen=%u != oldproglen=%u\n",
+ proglen, oldproglen);
+ break;
+ }
+ if (proglen == oldproglen) {
+ image = module_alloc(proglen);
+ if (!image)
+ goto out;
+ }
+ oldproglen = proglen;
+ }
+
+ if (bpf_jit_enable > 1)
+ bpf_jit_dump(flen, proglen, pass + 1, image);
+
+ if (image) {
+ bpf_flush_icache(image, image + proglen);
+ fp->bpf_func = (void *)image;
+ fp->jited = 1;
+ }
+out:
+ kfree(addrs);
+ return;
+}
+
+void bpf_jit_free(struct bpf_prog *fp)
+{
+ if (fp->jited)
+ module_memfree(fp->bpf_func);
+
+ bpf_prog_unlock_free(fp);
+}
diff --git a/arch/sparc/net/bpf_jit_comp_64.c b/arch/sparc/net/bpf_jit_comp_64.c
new file mode 100644
index 0000000..49b5f65
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_comp_64.c
@@ -0,0 +1 @@
+#include "bpf_jit_comp_32.c"
--
2.1.2.532.g19b5d50
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH net-next 1/2] sparc: Split BPF JIT into 32-bit and 64-bit.
@ 2017-04-18 18:58 ` David Miller
0 siblings, 0 replies; 6+ messages in thread
From: David Miller @ 2017-04-18 18:58 UTC (permalink / raw)
To: sparclinux; +Cc: netdev, ast, daniel
This is in preparation for adding the 64-bit eBPF JIT.
Signed-off-by: David S. Miller <davem@davemloft.net>
---
arch/sparc/net/Makefile | 2 +-
arch/sparc/net/bpf_jit.h | 68 ----
arch/sparc/net/bpf_jit_32.h | 68 ++++
arch/sparc/net/bpf_jit_asm.S | 208 ----------
arch/sparc/net/bpf_jit_asm_32.S | 208 ++++++++++
arch/sparc/net/bpf_jit_asm_64.S | 1 +
arch/sparc/net/bpf_jit_comp.c | 815 ---------------------------------------
arch/sparc/net/bpf_jit_comp_32.c | 815 +++++++++++++++++++++++++++++++++++++++
arch/sparc/net/bpf_jit_comp_64.c | 1 +
9 files changed, 1094 insertions(+), 1092 deletions(-)
delete mode 100644 arch/sparc/net/bpf_jit.h
create mode 100644 arch/sparc/net/bpf_jit_32.h
delete mode 100644 arch/sparc/net/bpf_jit_asm.S
create mode 100644 arch/sparc/net/bpf_jit_asm_32.S
create mode 100644 arch/sparc/net/bpf_jit_asm_64.S
delete mode 100644 arch/sparc/net/bpf_jit_comp.c
create mode 100644 arch/sparc/net/bpf_jit_comp_32.c
create mode 100644 arch/sparc/net/bpf_jit_comp_64.c
diff --git a/arch/sparc/net/Makefile b/arch/sparc/net/Makefile
index 1306a58..76fa8e9 100644
--- a/arch/sparc/net/Makefile
+++ b/arch/sparc/net/Makefile
@@ -1,4 +1,4 @@
#
# Arch-specific network modules
#
-obj-$(CONFIG_BPF_JIT) += bpf_jit_asm.o bpf_jit_comp.o
+obj-$(CONFIG_BPF_JIT) += bpf_jit_asm_$(BITS).o bpf_jit_comp_$(BITS).o
diff --git a/arch/sparc/net/bpf_jit.h b/arch/sparc/net/bpf_jit.h
deleted file mode 100644
index 33d6b37..0000000
--- a/arch/sparc/net/bpf_jit.h
+++ /dev/null
@@ -1,68 +0,0 @@
-#ifndef _BPF_JIT_H
-#define _BPF_JIT_H
-
-/* Conventions:
- * %g1 : temporary
- * %g2 : Secondary temporary used by SKB data helper stubs.
- * %g3 : packet offset passed into SKB data helper stubs.
- * %o0 : pointer to skb (first argument given to JIT function)
- * %o1 : BPF A accumulator
- * %o2 : BPF X accumulator
- * %o3 : Holds saved %o7 so we can call helper functions without needing
- * to allocate a register window.
- * %o4 : skb->len - skb->data_len
- * %o5 : skb->data
- */
-
-#ifndef __ASSEMBLER__
-#define G0 0x00
-#define G1 0x01
-#define G3 0x03
-#define G6 0x06
-#define O0 0x08
-#define O1 0x09
-#define O2 0x0a
-#define O3 0x0b
-#define O4 0x0c
-#define O5 0x0d
-#define SP 0x0e
-#define O7 0x0f
-#define FP 0x1e
-
-#define r_SKB O0
-#define r_A O1
-#define r_X O2
-#define r_saved_O7 O3
-#define r_HEADLEN O4
-#define r_SKB_DATA O5
-#define r_TMP G1
-#define r_TMP2 G2
-#define r_OFF G3
-
-/* assembly code in arch/sparc/net/bpf_jit_asm.S */
-extern u32 bpf_jit_load_word[];
-extern u32 bpf_jit_load_half[];
-extern u32 bpf_jit_load_byte[];
-extern u32 bpf_jit_load_byte_msh[];
-extern u32 bpf_jit_load_word_positive_offset[];
-extern u32 bpf_jit_load_half_positive_offset[];
-extern u32 bpf_jit_load_byte_positive_offset[];
-extern u32 bpf_jit_load_byte_msh_positive_offset[];
-extern u32 bpf_jit_load_word_negative_offset[];
-extern u32 bpf_jit_load_half_negative_offset[];
-extern u32 bpf_jit_load_byte_negative_offset[];
-extern u32 bpf_jit_load_byte_msh_negative_offset[];
-
-#else
-#define r_SKB %o0
-#define r_A %o1
-#define r_X %o2
-#define r_saved_O7 %o3
-#define r_HEADLEN %o4
-#define r_SKB_DATA %o5
-#define r_TMP %g1
-#define r_TMP2 %g2
-#define r_OFF %g3
-#endif
-
-#endif /* _BPF_JIT_H */
diff --git a/arch/sparc/net/bpf_jit_32.h b/arch/sparc/net/bpf_jit_32.h
new file mode 100644
index 0000000..33d6b37
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_32.h
@@ -0,0 +1,68 @@
+#ifndef _BPF_JIT_H
+#define _BPF_JIT_H
+
+/* Conventions:
+ * %g1 : temporary
+ * %g2 : Secondary temporary used by SKB data helper stubs.
+ * %g3 : packet offset passed into SKB data helper stubs.
+ * %o0 : pointer to skb (first argument given to JIT function)
+ * %o1 : BPF A accumulator
+ * %o2 : BPF X accumulator
+ * %o3 : Holds saved %o7 so we can call helper functions without needing
+ * to allocate a register window.
+ * %o4 : skb->len - skb->data_len
+ * %o5 : skb->data
+ */
+
+#ifndef __ASSEMBLER__
+#define G0 0x00
+#define G1 0x01
+#define G3 0x03
+#define G6 0x06
+#define O0 0x08
+#define O1 0x09
+#define O2 0x0a
+#define O3 0x0b
+#define O4 0x0c
+#define O5 0x0d
+#define SP 0x0e
+#define O7 0x0f
+#define FP 0x1e
+
+#define r_SKB O0
+#define r_A O1
+#define r_X O2
+#define r_saved_O7 O3
+#define r_HEADLEN O4
+#define r_SKB_DATA O5
+#define r_TMP G1
+#define r_TMP2 G2
+#define r_OFF G3
+
+/* assembly code in arch/sparc/net/bpf_jit_asm.S */
+extern u32 bpf_jit_load_word[];
+extern u32 bpf_jit_load_half[];
+extern u32 bpf_jit_load_byte[];
+extern u32 bpf_jit_load_byte_msh[];
+extern u32 bpf_jit_load_word_positive_offset[];
+extern u32 bpf_jit_load_half_positive_offset[];
+extern u32 bpf_jit_load_byte_positive_offset[];
+extern u32 bpf_jit_load_byte_msh_positive_offset[];
+extern u32 bpf_jit_load_word_negative_offset[];
+extern u32 bpf_jit_load_half_negative_offset[];
+extern u32 bpf_jit_load_byte_negative_offset[];
+extern u32 bpf_jit_load_byte_msh_negative_offset[];
+
+#else
+#define r_SKB %o0
+#define r_A %o1
+#define r_X %o2
+#define r_saved_O7 %o3
+#define r_HEADLEN %o4
+#define r_SKB_DATA %o5
+#define r_TMP %g1
+#define r_TMP2 %g2
+#define r_OFF %g3
+#endif
+
+#endif /* _BPF_JIT_H */
diff --git a/arch/sparc/net/bpf_jit_asm.S b/arch/sparc/net/bpf_jit_asm.S
deleted file mode 100644
index 8c83f4b..0000000
--- a/arch/sparc/net/bpf_jit_asm.S
+++ /dev/null
@@ -1,208 +0,0 @@
-#include <asm/ptrace.h>
-
-#include "bpf_jit.h"
-
-#ifdef CONFIG_SPARC64
-#define SAVE_SZ 176
-#define SCRATCH_OFF STACK_BIAS + 128
-#define BE_PTR(label) be,pn %xcc, label
-#define SIGN_EXTEND(reg) sra reg, 0, reg
-#else
-#define SAVE_SZ 96
-#define SCRATCH_OFF 72
-#define BE_PTR(label) be label
-#define SIGN_EXTEND(reg)
-#endif
-
-#define SKF_MAX_NEG_OFF (-0x200000) /* SKF_LL_OFF from filter.h */
-
- .text
- .globl bpf_jit_load_word
-bpf_jit_load_word:
- cmp r_OFF, 0
- bl bpf_slow_path_word_neg
- nop
- .globl bpf_jit_load_word_positive_offset
-bpf_jit_load_word_positive_offset:
- sub r_HEADLEN, r_OFF, r_TMP
- cmp r_TMP, 3
- ble bpf_slow_path_word
- add r_SKB_DATA, r_OFF, r_TMP
- andcc r_TMP, 3, %g0
- bne load_word_unaligned
- nop
- retl
- ld [r_TMP], r_A
-load_word_unaligned:
- ldub [r_TMP + 0x0], r_OFF
- ldub [r_TMP + 0x1], r_TMP2
- sll r_OFF, 8, r_OFF
- or r_OFF, r_TMP2, r_OFF
- ldub [r_TMP + 0x2], r_TMP2
- sll r_OFF, 8, r_OFF
- or r_OFF, r_TMP2, r_OFF
- ldub [r_TMP + 0x3], r_TMP2
- sll r_OFF, 8, r_OFF
- retl
- or r_OFF, r_TMP2, r_A
-
- .globl bpf_jit_load_half
-bpf_jit_load_half:
- cmp r_OFF, 0
- bl bpf_slow_path_half_neg
- nop
- .globl bpf_jit_load_half_positive_offset
-bpf_jit_load_half_positive_offset:
- sub r_HEADLEN, r_OFF, r_TMP
- cmp r_TMP, 1
- ble bpf_slow_path_half
- add r_SKB_DATA, r_OFF, r_TMP
- andcc r_TMP, 1, %g0
- bne load_half_unaligned
- nop
- retl
- lduh [r_TMP], r_A
-load_half_unaligned:
- ldub [r_TMP + 0x0], r_OFF
- ldub [r_TMP + 0x1], r_TMP2
- sll r_OFF, 8, r_OFF
- retl
- or r_OFF, r_TMP2, r_A
-
- .globl bpf_jit_load_byte
-bpf_jit_load_byte:
- cmp r_OFF, 0
- bl bpf_slow_path_byte_neg
- nop
- .globl bpf_jit_load_byte_positive_offset
-bpf_jit_load_byte_positive_offset:
- cmp r_OFF, r_HEADLEN
- bge bpf_slow_path_byte
- nop
- retl
- ldub [r_SKB_DATA + r_OFF], r_A
-
- .globl bpf_jit_load_byte_msh
-bpf_jit_load_byte_msh:
- cmp r_OFF, 0
- bl bpf_slow_path_byte_msh_neg
- nop
- .globl bpf_jit_load_byte_msh_positive_offset
-bpf_jit_load_byte_msh_positive_offset:
- cmp r_OFF, r_HEADLEN
- bge bpf_slow_path_byte_msh
- nop
- ldub [r_SKB_DATA + r_OFF], r_OFF
- and r_OFF, 0xf, r_OFF
- retl
- sll r_OFF, 2, r_X
-
-#define bpf_slow_path_common(LEN) \
- save %sp, -SAVE_SZ, %sp; \
- mov %i0, %o0; \
- mov r_OFF, %o1; \
- add %fp, SCRATCH_OFF, %o2; \
- call skb_copy_bits; \
- mov (LEN), %o3; \
- cmp %o0, 0; \
- restore;
-
-bpf_slow_path_word:
- bpf_slow_path_common(4)
- bl bpf_error
- ld [%sp + SCRATCH_OFF], r_A
- retl
- nop
-bpf_slow_path_half:
- bpf_slow_path_common(2)
- bl bpf_error
- lduh [%sp + SCRATCH_OFF], r_A
- retl
- nop
-bpf_slow_path_byte:
- bpf_slow_path_common(1)
- bl bpf_error
- ldub [%sp + SCRATCH_OFF], r_A
- retl
- nop
-bpf_slow_path_byte_msh:
- bpf_slow_path_common(1)
- bl bpf_error
- ldub [%sp + SCRATCH_OFF], r_A
- and r_OFF, 0xf, r_OFF
- retl
- sll r_OFF, 2, r_X
-
-#define bpf_negative_common(LEN) \
- save %sp, -SAVE_SZ, %sp; \
- mov %i0, %o0; \
- mov r_OFF, %o1; \
- SIGN_EXTEND(%o1); \
- call bpf_internal_load_pointer_neg_helper; \
- mov (LEN), %o2; \
- mov %o0, r_TMP; \
- cmp %o0, 0; \
- BE_PTR(bpf_error); \
- restore;
-
-bpf_slow_path_word_neg:
- sethi %hi(SKF_MAX_NEG_OFF), r_TMP
- cmp r_OFF, r_TMP
- bl bpf_error
- nop
- .globl bpf_jit_load_word_negative_offset
-bpf_jit_load_word_negative_offset:
- bpf_negative_common(4)
- andcc r_TMP, 3, %g0
- bne load_word_unaligned
- nop
- retl
- ld [r_TMP], r_A
-
-bpf_slow_path_half_neg:
- sethi %hi(SKF_MAX_NEG_OFF), r_TMP
- cmp r_OFF, r_TMP
- bl bpf_error
- nop
- .globl bpf_jit_load_half_negative_offset
-bpf_jit_load_half_negative_offset:
- bpf_negative_common(2)
- andcc r_TMP, 1, %g0
- bne load_half_unaligned
- nop
- retl
- lduh [r_TMP], r_A
-
-bpf_slow_path_byte_neg:
- sethi %hi(SKF_MAX_NEG_OFF), r_TMP
- cmp r_OFF, r_TMP
- bl bpf_error
- nop
- .globl bpf_jit_load_byte_negative_offset
-bpf_jit_load_byte_negative_offset:
- bpf_negative_common(1)
- retl
- ldub [r_TMP], r_A
-
-bpf_slow_path_byte_msh_neg:
- sethi %hi(SKF_MAX_NEG_OFF), r_TMP
- cmp r_OFF, r_TMP
- bl bpf_error
- nop
- .globl bpf_jit_load_byte_msh_negative_offset
-bpf_jit_load_byte_msh_negative_offset:
- bpf_negative_common(1)
- ldub [r_TMP], r_OFF
- and r_OFF, 0xf, r_OFF
- retl
- sll r_OFF, 2, r_X
-
-bpf_error:
- /* Make the JIT program return zero. The JIT epilogue
- * stores away the original %o7 into r_saved_O7. The
- * normal leaf function return is to use "retl" which
- * would evalute to "jmpl %o7 + 8, %g0" but we want to
- * use the saved value thus the sequence you see here.
- */
- jmpl r_saved_O7 + 8, %g0
- clr %o0
diff --git a/arch/sparc/net/bpf_jit_asm_32.S b/arch/sparc/net/bpf_jit_asm_32.S
new file mode 100644
index 0000000..5632cdc
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_asm_32.S
@@ -0,0 +1,208 @@
+#include <asm/ptrace.h>
+
+#include "bpf_jit_32.h"
+
+#ifdef CONFIG_SPARC64
+#define SAVE_SZ 176
+#define SCRATCH_OFF STACK_BIAS + 128
+#define BE_PTR(label) be,pn %xcc, label
+#define SIGN_EXTEND(reg) sra reg, 0, reg
+#else
+#define SAVE_SZ 96
+#define SCRATCH_OFF 72
+#define BE_PTR(label) be label
+#define SIGN_EXTEND(reg)
+#endif
+
+#define SKF_MAX_NEG_OFF (-0x200000) /* SKF_LL_OFF from filter.h */
+
+ .text
+ .globl bpf_jit_load_word
+bpf_jit_load_word:
+ cmp r_OFF, 0
+ bl bpf_slow_path_word_neg
+ nop
+ .globl bpf_jit_load_word_positive_offset
+bpf_jit_load_word_positive_offset:
+ sub r_HEADLEN, r_OFF, r_TMP
+ cmp r_TMP, 3
+ ble bpf_slow_path_word
+ add r_SKB_DATA, r_OFF, r_TMP
+ andcc r_TMP, 3, %g0
+ bne load_word_unaligned
+ nop
+ retl
+ ld [r_TMP], r_A
+load_word_unaligned:
+ ldub [r_TMP + 0x0], r_OFF
+ ldub [r_TMP + 0x1], r_TMP2
+ sll r_OFF, 8, r_OFF
+ or r_OFF, r_TMP2, r_OFF
+ ldub [r_TMP + 0x2], r_TMP2
+ sll r_OFF, 8, r_OFF
+ or r_OFF, r_TMP2, r_OFF
+ ldub [r_TMP + 0x3], r_TMP2
+ sll r_OFF, 8, r_OFF
+ retl
+ or r_OFF, r_TMP2, r_A
+
+ .globl bpf_jit_load_half
+bpf_jit_load_half:
+ cmp r_OFF, 0
+ bl bpf_slow_path_half_neg
+ nop
+ .globl bpf_jit_load_half_positive_offset
+bpf_jit_load_half_positive_offset:
+ sub r_HEADLEN, r_OFF, r_TMP
+ cmp r_TMP, 1
+ ble bpf_slow_path_half
+ add r_SKB_DATA, r_OFF, r_TMP
+ andcc r_TMP, 1, %g0
+ bne load_half_unaligned
+ nop
+ retl
+ lduh [r_TMP], r_A
+load_half_unaligned:
+ ldub [r_TMP + 0x0], r_OFF
+ ldub [r_TMP + 0x1], r_TMP2
+ sll r_OFF, 8, r_OFF
+ retl
+ or r_OFF, r_TMP2, r_A
+
+ .globl bpf_jit_load_byte
+bpf_jit_load_byte:
+ cmp r_OFF, 0
+ bl bpf_slow_path_byte_neg
+ nop
+ .globl bpf_jit_load_byte_positive_offset
+bpf_jit_load_byte_positive_offset:
+ cmp r_OFF, r_HEADLEN
+ bge bpf_slow_path_byte
+ nop
+ retl
+ ldub [r_SKB_DATA + r_OFF], r_A
+
+ .globl bpf_jit_load_byte_msh
+bpf_jit_load_byte_msh:
+ cmp r_OFF, 0
+ bl bpf_slow_path_byte_msh_neg
+ nop
+ .globl bpf_jit_load_byte_msh_positive_offset
+bpf_jit_load_byte_msh_positive_offset:
+ cmp r_OFF, r_HEADLEN
+ bge bpf_slow_path_byte_msh
+ nop
+ ldub [r_SKB_DATA + r_OFF], r_OFF
+ and r_OFF, 0xf, r_OFF
+ retl
+ sll r_OFF, 2, r_X
+
+#define bpf_slow_path_common(LEN) \
+ save %sp, -SAVE_SZ, %sp; \
+ mov %i0, %o0; \
+ mov r_OFF, %o1; \
+ add %fp, SCRATCH_OFF, %o2; \
+ call skb_copy_bits; \
+ mov (LEN), %o3; \
+ cmp %o0, 0; \
+ restore;
+
+bpf_slow_path_word:
+ bpf_slow_path_common(4)
+ bl bpf_error
+ ld [%sp + SCRATCH_OFF], r_A
+ retl
+ nop
+bpf_slow_path_half:
+ bpf_slow_path_common(2)
+ bl bpf_error
+ lduh [%sp + SCRATCH_OFF], r_A
+ retl
+ nop
+bpf_slow_path_byte:
+ bpf_slow_path_common(1)
+ bl bpf_error
+ ldub [%sp + SCRATCH_OFF], r_A
+ retl
+ nop
+bpf_slow_path_byte_msh:
+ bpf_slow_path_common(1)
+ bl bpf_error
+ ldub [%sp + SCRATCH_OFF], r_A
+ and r_OFF, 0xf, r_OFF
+ retl
+ sll r_OFF, 2, r_X
+
+#define bpf_negative_common(LEN) \
+ save %sp, -SAVE_SZ, %sp; \
+ mov %i0, %o0; \
+ mov r_OFF, %o1; \
+ SIGN_EXTEND(%o1); \
+ call bpf_internal_load_pointer_neg_helper; \
+ mov (LEN), %o2; \
+ mov %o0, r_TMP; \
+ cmp %o0, 0; \
+ BE_PTR(bpf_error); \
+ restore;
+
+bpf_slow_path_word_neg:
+ sethi %hi(SKF_MAX_NEG_OFF), r_TMP
+ cmp r_OFF, r_TMP
+ bl bpf_error
+ nop
+ .globl bpf_jit_load_word_negative_offset
+bpf_jit_load_word_negative_offset:
+ bpf_negative_common(4)
+ andcc r_TMP, 3, %g0
+ bne load_word_unaligned
+ nop
+ retl
+ ld [r_TMP], r_A
+
+bpf_slow_path_half_neg:
+ sethi %hi(SKF_MAX_NEG_OFF), r_TMP
+ cmp r_OFF, r_TMP
+ bl bpf_error
+ nop
+ .globl bpf_jit_load_half_negative_offset
+bpf_jit_load_half_negative_offset:
+ bpf_negative_common(2)
+ andcc r_TMP, 1, %g0
+ bne load_half_unaligned
+ nop
+ retl
+ lduh [r_TMP], r_A
+
+bpf_slow_path_byte_neg:
+ sethi %hi(SKF_MAX_NEG_OFF), r_TMP
+ cmp r_OFF, r_TMP
+ bl bpf_error
+ nop
+ .globl bpf_jit_load_byte_negative_offset
+bpf_jit_load_byte_negative_offset:
+ bpf_negative_common(1)
+ retl
+ ldub [r_TMP], r_A
+
+bpf_slow_path_byte_msh_neg:
+ sethi %hi(SKF_MAX_NEG_OFF), r_TMP
+ cmp r_OFF, r_TMP
+ bl bpf_error
+ nop
+ .globl bpf_jit_load_byte_msh_negative_offset
+bpf_jit_load_byte_msh_negative_offset:
+ bpf_negative_common(1)
+ ldub [r_TMP], r_OFF
+ and r_OFF, 0xf, r_OFF
+ retl
+ sll r_OFF, 2, r_X
+
+bpf_error:
+ /* Make the JIT program return zero. The JIT epilogue
+ * stores away the original %o7 into r_saved_O7. The
+ * normal leaf function return is to use "retl" which
+ * would evalute to "jmpl %o7 + 8, %g0" but we want to
+ * use the saved value thus the sequence you see here.
+ */
+ jmpl r_saved_O7 + 8, %g0
+ clr %o0
diff --git a/arch/sparc/net/bpf_jit_asm_64.S b/arch/sparc/net/bpf_jit_asm_64.S
new file mode 100644
index 0000000..6fb023f
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_asm_64.S
@@ -0,0 +1 @@
+#include "bpf_jit_asm_32.S"
diff --git a/arch/sparc/net/bpf_jit_comp.c b/arch/sparc/net/bpf_jit_comp.c
deleted file mode 100644
index a6d9204..0000000
--- a/arch/sparc/net/bpf_jit_comp.c
+++ /dev/null
@@ -1,815 +0,0 @@
-#include <linux/moduleloader.h>
-#include <linux/workqueue.h>
-#include <linux/netdevice.h>
-#include <linux/filter.h>
-#include <linux/cache.h>
-#include <linux/if_vlan.h>
-
-#include <asm/cacheflush.h>
-#include <asm/ptrace.h>
-
-#include "bpf_jit.h"
-
-int bpf_jit_enable __read_mostly;
-
-static inline bool is_simm13(unsigned int value)
-{
- return value + 0x1000 < 0x2000;
-}
-
-static void bpf_flush_icache(void *start_, void *end_)
-{
-#ifdef CONFIG_SPARC64
- /* Cheetah's I-cache is fully coherent. */
- if (tlb_type = spitfire) {
- unsigned long start = (unsigned long) start_;
- unsigned long end = (unsigned long) end_;
-
- start &= ~7UL;
- end = (end + 7UL) & ~7UL;
- while (start < end) {
- flushi(start);
- start += 32;
- }
- }
-#endif
-}
-
-#define SEEN_DATAREF 1 /* might call external helpers */
-#define SEEN_XREG 2 /* ebx is used */
-#define SEEN_MEM 4 /* use mem[] for temporary storage */
-
-#define S13(X) ((X) & 0x1fff)
-#define IMMED 0x00002000
-#define RD(X) ((X) << 25)
-#define RS1(X) ((X) << 14)
-#define RS2(X) ((X))
-#define OP(X) ((X) << 30)
-#define OP2(X) ((X) << 22)
-#define OP3(X) ((X) << 19)
-#define COND(X) ((X) << 25)
-#define F1(X) OP(X)
-#define F2(X, Y) (OP(X) | OP2(Y))
-#define F3(X, Y) (OP(X) | OP3(Y))
-
-#define CONDN COND(0x0)
-#define CONDE COND(0x1)
-#define CONDLE COND(0x2)
-#define CONDL COND(0x3)
-#define CONDLEU COND(0x4)
-#define CONDCS COND(0x5)
-#define CONDNEG COND(0x6)
-#define CONDVC COND(0x7)
-#define CONDA COND(0x8)
-#define CONDNE COND(0x9)
-#define CONDG COND(0xa)
-#define CONDGE COND(0xb)
-#define CONDGU COND(0xc)
-#define CONDCC COND(0xd)
-#define CONDPOS COND(0xe)
-#define CONDVS COND(0xf)
-
-#define CONDGEU CONDCC
-#define CONDLU CONDCS
-
-#define WDISP22(X) (((X) >> 2) & 0x3fffff)
-
-#define BA (F2(0, 2) | CONDA)
-#define BGU (F2(0, 2) | CONDGU)
-#define BLEU (F2(0, 2) | CONDLEU)
-#define BGEU (F2(0, 2) | CONDGEU)
-#define BLU (F2(0, 2) | CONDLU)
-#define BE (F2(0, 2) | CONDE)
-#define BNE (F2(0, 2) | CONDNE)
-
-#ifdef CONFIG_SPARC64
-#define BE_PTR (F2(0, 1) | CONDE | (2 << 20))
-#else
-#define BE_PTR BE
-#endif
-
-#define SETHI(K, REG) \
- (F2(0, 0x4) | RD(REG) | (((K) >> 10) & 0x3fffff))
-#define OR_LO(K, REG) \
- (F3(2, 0x02) | IMMED | RS1(REG) | ((K) & 0x3ff) | RD(REG))
-
-#define ADD F3(2, 0x00)
-#define AND F3(2, 0x01)
-#define ANDCC F3(2, 0x11)
-#define OR F3(2, 0x02)
-#define XOR F3(2, 0x03)
-#define SUB F3(2, 0x04)
-#define SUBCC F3(2, 0x14)
-#define MUL F3(2, 0x0a) /* umul */
-#define DIV F3(2, 0x0e) /* udiv */
-#define SLL F3(2, 0x25)
-#define SRL F3(2, 0x26)
-#define JMPL F3(2, 0x38)
-#define CALL F1(1)
-#define BR F2(0, 0x01)
-#define RD_Y F3(2, 0x28)
-#define WR_Y F3(2, 0x30)
-
-#define LD32 F3(3, 0x00)
-#define LD8 F3(3, 0x01)
-#define LD16 F3(3, 0x02)
-#define LD64 F3(3, 0x0b)
-#define ST32 F3(3, 0x04)
-
-#ifdef CONFIG_SPARC64
-#define LDPTR LD64
-#define BASE_STACKFRAME 176
-#else
-#define LDPTR LD32
-#define BASE_STACKFRAME 96
-#endif
-
-#define LD32I (LD32 | IMMED)
-#define LD8I (LD8 | IMMED)
-#define LD16I (LD16 | IMMED)
-#define LD64I (LD64 | IMMED)
-#define LDPTRI (LDPTR | IMMED)
-#define ST32I (ST32 | IMMED)
-
-#define emit_nop() \
-do { \
- *prog++ = SETHI(0, G0); \
-} while (0)
-
-#define emit_neg() \
-do { /* sub %g0, r_A, r_A */ \
- *prog++ = SUB | RS1(G0) | RS2(r_A) | RD(r_A); \
-} while (0)
-
-#define emit_reg_move(FROM, TO) \
-do { /* or %g0, FROM, TO */ \
- *prog++ = OR | RS1(G0) | RS2(FROM) | RD(TO); \
-} while (0)
-
-#define emit_clear(REG) \
-do { /* or %g0, %g0, REG */ \
- *prog++ = OR | RS1(G0) | RS2(G0) | RD(REG); \
-} while (0)
-
-#define emit_set_const(K, REG) \
-do { /* sethi %hi(K), REG */ \
- *prog++ = SETHI(K, REG); \
- /* or REG, %lo(K), REG */ \
- *prog++ = OR_LO(K, REG); \
-} while (0)
-
- /* Emit
- *
- * OP r_A, r_X, r_A
- */
-#define emit_alu_X(OPCODE) \
-do { \
- seen |= SEEN_XREG; \
- *prog++ = OPCODE | RS1(r_A) | RS2(r_X) | RD(r_A); \
-} while (0)
-
- /* Emit either:
- *
- * OP r_A, K, r_A
- *
- * or
- *
- * sethi %hi(K), r_TMP
- * or r_TMP, %lo(K), r_TMP
- * OP r_A, r_TMP, r_A
- *
- * depending upon whether K fits in a signed 13-bit
- * immediate instruction field. Emit nothing if K
- * is zero.
- */
-#define emit_alu_K(OPCODE, K) \
-do { \
- if (K || OPCODE = AND || OPCODE = MUL) { \
- unsigned int _insn = OPCODE; \
- _insn |= RS1(r_A) | RD(r_A); \
- if (is_simm13(K)) { \
- *prog++ = _insn | IMMED | S13(K); \
- } else { \
- emit_set_const(K, r_TMP); \
- *prog++ = _insn | RS2(r_TMP); \
- } \
- } \
-} while (0)
-
-#define emit_loadimm(K, DEST) \
-do { \
- if (is_simm13(K)) { \
- /* or %g0, K, DEST */ \
- *prog++ = OR | IMMED | RS1(G0) | S13(K) | RD(DEST); \
- } else { \
- emit_set_const(K, DEST); \
- } \
-} while (0)
-
-#define emit_loadptr(BASE, STRUCT, FIELD, DEST) \
-do { unsigned int _off = offsetof(STRUCT, FIELD); \
- BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(void *)); \
- *prog++ = LDPTRI | RS1(BASE) | S13(_off) | RD(DEST); \
-} while (0)
-
-#define emit_load32(BASE, STRUCT, FIELD, DEST) \
-do { unsigned int _off = offsetof(STRUCT, FIELD); \
- BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(u32)); \
- *prog++ = LD32I | RS1(BASE) | S13(_off) | RD(DEST); \
-} while (0)
-
-#define emit_load16(BASE, STRUCT, FIELD, DEST) \
-do { unsigned int _off = offsetof(STRUCT, FIELD); \
- BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(u16)); \
- *prog++ = LD16I | RS1(BASE) | S13(_off) | RD(DEST); \
-} while (0)
-
-#define __emit_load8(BASE, STRUCT, FIELD, DEST) \
-do { unsigned int _off = offsetof(STRUCT, FIELD); \
- *prog++ = LD8I | RS1(BASE) | S13(_off) | RD(DEST); \
-} while (0)
-
-#define emit_load8(BASE, STRUCT, FIELD, DEST) \
-do { BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(u8)); \
- __emit_load8(BASE, STRUCT, FIELD, DEST); \
-} while (0)
-
-#ifdef CONFIG_SPARC64
-#define BIAS (STACK_BIAS - 4)
-#else
-#define BIAS (-4)
-#endif
-
-#define emit_ldmem(OFF, DEST) \
-do { *prog++ = LD32I | RS1(SP) | S13(BIAS - (OFF)) | RD(DEST); \
-} while (0)
-
-#define emit_stmem(OFF, SRC) \
-do { *prog++ = ST32I | RS1(SP) | S13(BIAS - (OFF)) | RD(SRC); \
-} while (0)
-
-#ifdef CONFIG_SMP
-#ifdef CONFIG_SPARC64
-#define emit_load_cpu(REG) \
- emit_load16(G6, struct thread_info, cpu, REG)
-#else
-#define emit_load_cpu(REG) \
- emit_load32(G6, struct thread_info, cpu, REG)
-#endif
-#else
-#define emit_load_cpu(REG) emit_clear(REG)
-#endif
-
-#define emit_skb_loadptr(FIELD, DEST) \
- emit_loadptr(r_SKB, struct sk_buff, FIELD, DEST)
-#define emit_skb_load32(FIELD, DEST) \
- emit_load32(r_SKB, struct sk_buff, FIELD, DEST)
-#define emit_skb_load16(FIELD, DEST) \
- emit_load16(r_SKB, struct sk_buff, FIELD, DEST)
-#define __emit_skb_load8(FIELD, DEST) \
- __emit_load8(r_SKB, struct sk_buff, FIELD, DEST)
-#define emit_skb_load8(FIELD, DEST) \
- emit_load8(r_SKB, struct sk_buff, FIELD, DEST)
-
-#define emit_jmpl(BASE, IMM_OFF, LREG) \
- *prog++ = (JMPL | IMMED | RS1(BASE) | S13(IMM_OFF) | RD(LREG))
-
-#define emit_call(FUNC) \
-do { void *_here = image + addrs[i] - 8; \
- unsigned int _off = (void *)(FUNC) - _here; \
- *prog++ = CALL | (((_off) >> 2) & 0x3fffffff); \
- emit_nop(); \
-} while (0)
-
-#define emit_branch(BR_OPC, DEST) \
-do { unsigned int _here = addrs[i] - 8; \
- *prog++ = BR_OPC | WDISP22((DEST) - _here); \
-} while (0)
-
-#define emit_branch_off(BR_OPC, OFF) \
-do { *prog++ = BR_OPC | WDISP22(OFF); \
-} while (0)
-
-#define emit_jump(DEST) emit_branch(BA, DEST)
-
-#define emit_read_y(REG) *prog++ = RD_Y | RD(REG)
-#define emit_write_y(REG) *prog++ = WR_Y | IMMED | RS1(REG) | S13(0)
-
-#define emit_cmp(R1, R2) \
- *prog++ = (SUBCC | RS1(R1) | RS2(R2) | RD(G0))
-
-#define emit_cmpi(R1, IMM) \
- *prog++ = (SUBCC | IMMED | RS1(R1) | S13(IMM) | RD(G0));
-
-#define emit_btst(R1, R2) \
- *prog++ = (ANDCC | RS1(R1) | RS2(R2) | RD(G0))
-
-#define emit_btsti(R1, IMM) \
- *prog++ = (ANDCC | IMMED | RS1(R1) | S13(IMM) | RD(G0));
-
-#define emit_sub(R1, R2, R3) \
- *prog++ = (SUB | RS1(R1) | RS2(R2) | RD(R3))
-
-#define emit_subi(R1, IMM, R3) \
- *prog++ = (SUB | IMMED | RS1(R1) | S13(IMM) | RD(R3))
-
-#define emit_add(R1, R2, R3) \
- *prog++ = (ADD | RS1(R1) | RS2(R2) | RD(R3))
-
-#define emit_addi(R1, IMM, R3) \
- *prog++ = (ADD | IMMED | RS1(R1) | S13(IMM) | RD(R3))
-
-#define emit_and(R1, R2, R3) \
- *prog++ = (AND | RS1(R1) | RS2(R2) | RD(R3))
-
-#define emit_andi(R1, IMM, R3) \
- *prog++ = (AND | IMMED | RS1(R1) | S13(IMM) | RD(R3))
-
-#define emit_alloc_stack(SZ) \
- *prog++ = (SUB | IMMED | RS1(SP) | S13(SZ) | RD(SP))
-
-#define emit_release_stack(SZ) \
- *prog++ = (ADD | IMMED | RS1(SP) | S13(SZ) | RD(SP))
-
-/* A note about branch offset calculations. The addrs[] array,
- * indexed by BPF instruction, records the address after all the
- * sparc instructions emitted for that BPF instruction.
- *
- * The most common case is to emit a branch at the end of such
- * a code sequence. So this would be two instructions, the
- * branch and it's delay slot.
- *
- * Therefore by default the branch emitters calculate the branch
- * offset field as:
- *
- * destination - (addrs[i] - 8)
- *
- * This "addrs[i] - 8" is the address of the branch itself or
- * what "." would be in assembler notation. The "8" part is
- * how we take into consideration the branch and it's delay
- * slot mentioned above.
- *
- * Sometimes we need to emit a branch earlier in the code
- * sequence. And in these situations we adjust "destination"
- * to accommodate this difference. For example, if we needed
- * to emit a branch (and it's delay slot) right before the
- * final instruction emitted for a BPF opcode, we'd use
- * "destination + 4" instead of just plain "destination" above.
- *
- * This is why you see all of these funny emit_branch() and
- * emit_jump() calls with adjusted offsets.
- */
-
-void bpf_jit_compile(struct bpf_prog *fp)
-{
- unsigned int cleanup_addr, proglen, oldproglen = 0;
- u32 temp[8], *prog, *func, seen = 0, pass;
- const struct sock_filter *filter = fp->insns;
- int i, flen = fp->len, pc_ret0 = -1;
- unsigned int *addrs;
- void *image;
-
- if (!bpf_jit_enable)
- return;
-
- addrs = kmalloc(flen * sizeof(*addrs), GFP_KERNEL);
- if (addrs = NULL)
- return;
-
- /* Before first pass, make a rough estimation of addrs[]
- * each bpf instruction is translated to less than 64 bytes
- */
- for (proglen = 0, i = 0; i < flen; i++) {
- proglen += 64;
- addrs[i] = proglen;
- }
- cleanup_addr = proglen; /* epilogue address */
- image = NULL;
- for (pass = 0; pass < 10; pass++) {
- u8 seen_or_pass0 = (pass = 0) ? (SEEN_XREG | SEEN_DATAREF | SEEN_MEM) : seen;
-
- /* no prologue/epilogue for trivial filters (RET something) */
- proglen = 0;
- prog = temp;
-
- /* Prologue */
- if (seen_or_pass0) {
- if (seen_or_pass0 & SEEN_MEM) {
- unsigned int sz = BASE_STACKFRAME;
- sz += BPF_MEMWORDS * sizeof(u32);
- emit_alloc_stack(sz);
- }
-
- /* Make sure we dont leek kernel memory. */
- if (seen_or_pass0 & SEEN_XREG)
- emit_clear(r_X);
-
- /* If this filter needs to access skb data,
- * load %o4 and %o5 with:
- * %o4 = skb->len - skb->data_len
- * %o5 = skb->data
- * And also back up %o7 into r_saved_O7 so we can
- * invoke the stubs using 'call'.
- */
- if (seen_or_pass0 & SEEN_DATAREF) {
- emit_load32(r_SKB, struct sk_buff, len, r_HEADLEN);
- emit_load32(r_SKB, struct sk_buff, data_len, r_TMP);
- emit_sub(r_HEADLEN, r_TMP, r_HEADLEN);
- emit_loadptr(r_SKB, struct sk_buff, data, r_SKB_DATA);
- }
- }
- emit_reg_move(O7, r_saved_O7);
-
- /* Make sure we dont leak kernel information to the user. */
- if (bpf_needs_clear_a(&filter[0]))
- emit_clear(r_A); /* A = 0 */
-
- for (i = 0; i < flen; i++) {
- unsigned int K = filter[i].k;
- unsigned int t_offset;
- unsigned int f_offset;
- u32 t_op, f_op;
- u16 code = bpf_anc_helper(&filter[i]);
- int ilen;
-
- switch (code) {
- case BPF_ALU | BPF_ADD | BPF_X: /* A += X; */
- emit_alu_X(ADD);
- break;
- case BPF_ALU | BPF_ADD | BPF_K: /* A += K; */
- emit_alu_K(ADD, K);
- break;
- case BPF_ALU | BPF_SUB | BPF_X: /* A -= X; */
- emit_alu_X(SUB);
- break;
- case BPF_ALU | BPF_SUB | BPF_K: /* A -= K */
- emit_alu_K(SUB, K);
- break;
- case BPF_ALU | BPF_AND | BPF_X: /* A &= X */
- emit_alu_X(AND);
- break;
- case BPF_ALU | BPF_AND | BPF_K: /* A &= K */
- emit_alu_K(AND, K);
- break;
- case BPF_ALU | BPF_OR | BPF_X: /* A |= X */
- emit_alu_X(OR);
- break;
- case BPF_ALU | BPF_OR | BPF_K: /* A |= K */
- emit_alu_K(OR, K);
- break;
- case BPF_ANC | SKF_AD_ALU_XOR_X: /* A ^= X; */
- case BPF_ALU | BPF_XOR | BPF_X:
- emit_alu_X(XOR);
- break;
- case BPF_ALU | BPF_XOR | BPF_K: /* A ^= K */
- emit_alu_K(XOR, K);
- break;
- case BPF_ALU | BPF_LSH | BPF_X: /* A <<= X */
- emit_alu_X(SLL);
- break;
- case BPF_ALU | BPF_LSH | BPF_K: /* A <<= K */
- emit_alu_K(SLL, K);
- break;
- case BPF_ALU | BPF_RSH | BPF_X: /* A >>= X */
- emit_alu_X(SRL);
- break;
- case BPF_ALU | BPF_RSH | BPF_K: /* A >>= K */
- emit_alu_K(SRL, K);
- break;
- case BPF_ALU | BPF_MUL | BPF_X: /* A *= X; */
- emit_alu_X(MUL);
- break;
- case BPF_ALU | BPF_MUL | BPF_K: /* A *= K */
- emit_alu_K(MUL, K);
- break;
- case BPF_ALU | BPF_DIV | BPF_K: /* A /= K with K != 0*/
- if (K = 1)
- break;
- emit_write_y(G0);
-#ifdef CONFIG_SPARC32
- /* The Sparc v8 architecture requires
- * three instructions between a %y
- * register write and the first use.
- */
- emit_nop();
- emit_nop();
- emit_nop();
-#endif
- emit_alu_K(DIV, K);
- break;
- case BPF_ALU | BPF_DIV | BPF_X: /* A /= X; */
- emit_cmpi(r_X, 0);
- if (pc_ret0 > 0) {
- t_offset = addrs[pc_ret0 - 1];
-#ifdef CONFIG_SPARC32
- emit_branch(BE, t_offset + 20);
-#else
- emit_branch(BE, t_offset + 8);
-#endif
- emit_nop(); /* delay slot */
- } else {
- emit_branch_off(BNE, 16);
- emit_nop();
-#ifdef CONFIG_SPARC32
- emit_jump(cleanup_addr + 20);
-#else
- emit_jump(cleanup_addr + 8);
-#endif
- emit_clear(r_A);
- }
- emit_write_y(G0);
-#ifdef CONFIG_SPARC32
- /* The Sparc v8 architecture requires
- * three instructions between a %y
- * register write and the first use.
- */
- emit_nop();
- emit_nop();
- emit_nop();
-#endif
- emit_alu_X(DIV);
- break;
- case BPF_ALU | BPF_NEG:
- emit_neg();
- break;
- case BPF_RET | BPF_K:
- if (!K) {
- if (pc_ret0 = -1)
- pc_ret0 = i;
- emit_clear(r_A);
- } else {
- emit_loadimm(K, r_A);
- }
- /* Fallthrough */
- case BPF_RET | BPF_A:
- if (seen_or_pass0) {
- if (i != flen - 1) {
- emit_jump(cleanup_addr);
- emit_nop();
- break;
- }
- if (seen_or_pass0 & SEEN_MEM) {
- unsigned int sz = BASE_STACKFRAME;
- sz += BPF_MEMWORDS * sizeof(u32);
- emit_release_stack(sz);
- }
- }
- /* jmpl %r_saved_O7 + 8, %g0 */
- emit_jmpl(r_saved_O7, 8, G0);
- emit_reg_move(r_A, O0); /* delay slot */
- break;
- case BPF_MISC | BPF_TAX:
- seen |= SEEN_XREG;
- emit_reg_move(r_A, r_X);
- break;
- case BPF_MISC | BPF_TXA:
- seen |= SEEN_XREG;
- emit_reg_move(r_X, r_A);
- break;
- case BPF_ANC | SKF_AD_CPU:
- emit_load_cpu(r_A);
- break;
- case BPF_ANC | SKF_AD_PROTOCOL:
- emit_skb_load16(protocol, r_A);
- break;
- case BPF_ANC | SKF_AD_PKTTYPE:
- __emit_skb_load8(__pkt_type_offset, r_A);
- emit_andi(r_A, PKT_TYPE_MAX, r_A);
- emit_alu_K(SRL, 5);
- break;
- case BPF_ANC | SKF_AD_IFINDEX:
- emit_skb_loadptr(dev, r_A);
- emit_cmpi(r_A, 0);
- emit_branch(BE_PTR, cleanup_addr + 4);
- emit_nop();
- emit_load32(r_A, struct net_device, ifindex, r_A);
- break;
- case BPF_ANC | SKF_AD_MARK:
- emit_skb_load32(mark, r_A);
- break;
- case BPF_ANC | SKF_AD_QUEUE:
- emit_skb_load16(queue_mapping, r_A);
- break;
- case BPF_ANC | SKF_AD_HATYPE:
- emit_skb_loadptr(dev, r_A);
- emit_cmpi(r_A, 0);
- emit_branch(BE_PTR, cleanup_addr + 4);
- emit_nop();
- emit_load16(r_A, struct net_device, type, r_A);
- break;
- case BPF_ANC | SKF_AD_RXHASH:
- emit_skb_load32(hash, r_A);
- break;
- case BPF_ANC | SKF_AD_VLAN_TAG:
- case BPF_ANC | SKF_AD_VLAN_TAG_PRESENT:
- emit_skb_load16(vlan_tci, r_A);
- if (code != (BPF_ANC | SKF_AD_VLAN_TAG)) {
- emit_alu_K(SRL, 12);
- emit_andi(r_A, 1, r_A);
- } else {
- emit_loadimm(~VLAN_TAG_PRESENT, r_TMP);
- emit_and(r_A, r_TMP, r_A);
- }
- break;
- case BPF_LD | BPF_W | BPF_LEN:
- emit_skb_load32(len, r_A);
- break;
- case BPF_LDX | BPF_W | BPF_LEN:
- emit_skb_load32(len, r_X);
- break;
- case BPF_LD | BPF_IMM:
- emit_loadimm(K, r_A);
- break;
- case BPF_LDX | BPF_IMM:
- emit_loadimm(K, r_X);
- break;
- case BPF_LD | BPF_MEM:
- seen |= SEEN_MEM;
- emit_ldmem(K * 4, r_A);
- break;
- case BPF_LDX | BPF_MEM:
- seen |= SEEN_MEM | SEEN_XREG;
- emit_ldmem(K * 4, r_X);
- break;
- case BPF_ST:
- seen |= SEEN_MEM;
- emit_stmem(K * 4, r_A);
- break;
- case BPF_STX:
- seen |= SEEN_MEM | SEEN_XREG;
- emit_stmem(K * 4, r_X);
- break;
-
-#define CHOOSE_LOAD_FUNC(K, func) \
- ((int)K < 0 ? ((int)K >= SKF_LL_OFF ? func##_negative_offset : func) : func##_positive_offset)
-
- case BPF_LD | BPF_W | BPF_ABS:
- func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_word);
-common_load: seen |= SEEN_DATAREF;
- emit_loadimm(K, r_OFF);
- emit_call(func);
- break;
- case BPF_LD | BPF_H | BPF_ABS:
- func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_half);
- goto common_load;
- case BPF_LD | BPF_B | BPF_ABS:
- func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_byte);
- goto common_load;
- case BPF_LDX | BPF_B | BPF_MSH:
- func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_byte_msh);
- goto common_load;
- case BPF_LD | BPF_W | BPF_IND:
- func = bpf_jit_load_word;
-common_load_ind: seen |= SEEN_DATAREF | SEEN_XREG;
- if (K) {
- if (is_simm13(K)) {
- emit_addi(r_X, K, r_OFF);
- } else {
- emit_loadimm(K, r_TMP);
- emit_add(r_X, r_TMP, r_OFF);
- }
- } else {
- emit_reg_move(r_X, r_OFF);
- }
- emit_call(func);
- break;
- case BPF_LD | BPF_H | BPF_IND:
- func = bpf_jit_load_half;
- goto common_load_ind;
- case BPF_LD | BPF_B | BPF_IND:
- func = bpf_jit_load_byte;
- goto common_load_ind;
- case BPF_JMP | BPF_JA:
- emit_jump(addrs[i + K]);
- emit_nop();
- break;
-
-#define COND_SEL(CODE, TOP, FOP) \
- case CODE: \
- t_op = TOP; \
- f_op = FOP; \
- goto cond_branch
-
- COND_SEL(BPF_JMP | BPF_JGT | BPF_K, BGU, BLEU);
- COND_SEL(BPF_JMP | BPF_JGE | BPF_K, BGEU, BLU);
- COND_SEL(BPF_JMP | BPF_JEQ | BPF_K, BE, BNE);
- COND_SEL(BPF_JMP | BPF_JSET | BPF_K, BNE, BE);
- COND_SEL(BPF_JMP | BPF_JGT | BPF_X, BGU, BLEU);
- COND_SEL(BPF_JMP | BPF_JGE | BPF_X, BGEU, BLU);
- COND_SEL(BPF_JMP | BPF_JEQ | BPF_X, BE, BNE);
- COND_SEL(BPF_JMP | BPF_JSET | BPF_X, BNE, BE);
-
-cond_branch: f_offset = addrs[i + filter[i].jf];
- t_offset = addrs[i + filter[i].jt];
-
- /* same targets, can avoid doing the test :) */
- if (filter[i].jt = filter[i].jf) {
- emit_jump(t_offset);
- emit_nop();
- break;
- }
-
- switch (code) {
- case BPF_JMP | BPF_JGT | BPF_X:
- case BPF_JMP | BPF_JGE | BPF_X:
- case BPF_JMP | BPF_JEQ | BPF_X:
- seen |= SEEN_XREG;
- emit_cmp(r_A, r_X);
- break;
- case BPF_JMP | BPF_JSET | BPF_X:
- seen |= SEEN_XREG;
- emit_btst(r_A, r_X);
- break;
- case BPF_JMP | BPF_JEQ | BPF_K:
- case BPF_JMP | BPF_JGT | BPF_K:
- case BPF_JMP | BPF_JGE | BPF_K:
- if (is_simm13(K)) {
- emit_cmpi(r_A, K);
- } else {
- emit_loadimm(K, r_TMP);
- emit_cmp(r_A, r_TMP);
- }
- break;
- case BPF_JMP | BPF_JSET | BPF_K:
- if (is_simm13(K)) {
- emit_btsti(r_A, K);
- } else {
- emit_loadimm(K, r_TMP);
- emit_btst(r_A, r_TMP);
- }
- break;
- }
- if (filter[i].jt != 0) {
- if (filter[i].jf)
- t_offset += 8;
- emit_branch(t_op, t_offset);
- emit_nop(); /* delay slot */
- if (filter[i].jf) {
- emit_jump(f_offset);
- emit_nop();
- }
- break;
- }
- emit_branch(f_op, f_offset);
- emit_nop(); /* delay slot */
- break;
-
- default:
- /* hmm, too complex filter, give up with jit compiler */
- goto out;
- }
- ilen = (void *) prog - (void *) temp;
- if (image) {
- if (unlikely(proglen + ilen > oldproglen)) {
- pr_err("bpb_jit_compile fatal error\n");
- kfree(addrs);
- module_memfree(image);
- return;
- }
- memcpy(image + proglen, temp, ilen);
- }
- proglen += ilen;
- addrs[i] = proglen;
- prog = temp;
- }
- /* last bpf instruction is always a RET :
- * use it to give the cleanup instruction(s) addr
- */
- cleanup_addr = proglen - 8; /* jmpl; mov r_A,%o0; */
- if (seen_or_pass0 & SEEN_MEM)
- cleanup_addr -= 4; /* add %sp, X, %sp; */
-
- if (image) {
- if (proglen != oldproglen)
- pr_err("bpb_jit_compile proglen=%u != oldproglen=%u\n",
- proglen, oldproglen);
- break;
- }
- if (proglen = oldproglen) {
- image = module_alloc(proglen);
- if (!image)
- goto out;
- }
- oldproglen = proglen;
- }
-
- if (bpf_jit_enable > 1)
- bpf_jit_dump(flen, proglen, pass + 1, image);
-
- if (image) {
- bpf_flush_icache(image, image + proglen);
- fp->bpf_func = (void *)image;
- fp->jited = 1;
- }
-out:
- kfree(addrs);
- return;
-}
-
-void bpf_jit_free(struct bpf_prog *fp)
-{
- if (fp->jited)
- module_memfree(fp->bpf_func);
-
- bpf_prog_unlock_free(fp);
-}
diff --git a/arch/sparc/net/bpf_jit_comp_32.c b/arch/sparc/net/bpf_jit_comp_32.c
new file mode 100644
index 0000000..83fc41d
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_comp_32.c
@@ -0,0 +1,815 @@
+#include <linux/moduleloader.h>
+#include <linux/workqueue.h>
+#include <linux/netdevice.h>
+#include <linux/filter.h>
+#include <linux/cache.h>
+#include <linux/if_vlan.h>
+
+#include <asm/cacheflush.h>
+#include <asm/ptrace.h>
+
+#include "bpf_jit_32.h"
+
+int bpf_jit_enable __read_mostly;
+
+static inline bool is_simm13(unsigned int value)
+{
+ return value + 0x1000 < 0x2000;
+}
+
+static void bpf_flush_icache(void *start_, void *end_)
+{
+#ifdef CONFIG_SPARC64
+ /* Cheetah's I-cache is fully coherent. */
+ if (tlb_type = spitfire) {
+ unsigned long start = (unsigned long) start_;
+ unsigned long end = (unsigned long) end_;
+
+ start &= ~7UL;
+ end = (end + 7UL) & ~7UL;
+ while (start < end) {
+ flushi(start);
+ start += 32;
+ }
+ }
+#endif
+}
+
+#define SEEN_DATAREF 1 /* might call external helpers */
+#define SEEN_XREG 2 /* ebx is used */
+#define SEEN_MEM 4 /* use mem[] for temporary storage */
+
+#define S13(X) ((X) & 0x1fff)
+#define IMMED 0x00002000
+#define RD(X) ((X) << 25)
+#define RS1(X) ((X) << 14)
+#define RS2(X) ((X))
+#define OP(X) ((X) << 30)
+#define OP2(X) ((X) << 22)
+#define OP3(X) ((X) << 19)
+#define COND(X) ((X) << 25)
+#define F1(X) OP(X)
+#define F2(X, Y) (OP(X) | OP2(Y))
+#define F3(X, Y) (OP(X) | OP3(Y))
+
+#define CONDN COND(0x0)
+#define CONDE COND(0x1)
+#define CONDLE COND(0x2)
+#define CONDL COND(0x3)
+#define CONDLEU COND(0x4)
+#define CONDCS COND(0x5)
+#define CONDNEG COND(0x6)
+#define CONDVC COND(0x7)
+#define CONDA COND(0x8)
+#define CONDNE COND(0x9)
+#define CONDG COND(0xa)
+#define CONDGE COND(0xb)
+#define CONDGU COND(0xc)
+#define CONDCC COND(0xd)
+#define CONDPOS COND(0xe)
+#define CONDVS COND(0xf)
+
+#define CONDGEU CONDCC
+#define CONDLU CONDCS
+
+#define WDISP22(X) (((X) >> 2) & 0x3fffff)
+
+#define BA (F2(0, 2) | CONDA)
+#define BGU (F2(0, 2) | CONDGU)
+#define BLEU (F2(0, 2) | CONDLEU)
+#define BGEU (F2(0, 2) | CONDGEU)
+#define BLU (F2(0, 2) | CONDLU)
+#define BE (F2(0, 2) | CONDE)
+#define BNE (F2(0, 2) | CONDNE)
+
+#ifdef CONFIG_SPARC64
+#define BE_PTR (F2(0, 1) | CONDE | (2 << 20))
+#else
+#define BE_PTR BE
+#endif
+
+#define SETHI(K, REG) \
+ (F2(0, 0x4) | RD(REG) | (((K) >> 10) & 0x3fffff))
+#define OR_LO(K, REG) \
+ (F3(2, 0x02) | IMMED | RS1(REG) | ((K) & 0x3ff) | RD(REG))
+
+#define ADD F3(2, 0x00)
+#define AND F3(2, 0x01)
+#define ANDCC F3(2, 0x11)
+#define OR F3(2, 0x02)
+#define XOR F3(2, 0x03)
+#define SUB F3(2, 0x04)
+#define SUBCC F3(2, 0x14)
+#define MUL F3(2, 0x0a) /* umul */
+#define DIV F3(2, 0x0e) /* udiv */
+#define SLL F3(2, 0x25)
+#define SRL F3(2, 0x26)
+#define JMPL F3(2, 0x38)
+#define CALL F1(1)
+#define BR F2(0, 0x01)
+#define RD_Y F3(2, 0x28)
+#define WR_Y F3(2, 0x30)
+
+#define LD32 F3(3, 0x00)
+#define LD8 F3(3, 0x01)
+#define LD16 F3(3, 0x02)
+#define LD64 F3(3, 0x0b)
+#define ST32 F3(3, 0x04)
+
+#ifdef CONFIG_SPARC64
+#define LDPTR LD64
+#define BASE_STACKFRAME 176
+#else
+#define LDPTR LD32
+#define BASE_STACKFRAME 96
+#endif
+
+#define LD32I (LD32 | IMMED)
+#define LD8I (LD8 | IMMED)
+#define LD16I (LD16 | IMMED)
+#define LD64I (LD64 | IMMED)
+#define LDPTRI (LDPTR | IMMED)
+#define ST32I (ST32 | IMMED)
+
+#define emit_nop() \
+do { \
+ *prog++ = SETHI(0, G0); \
+} while (0)
+
+#define emit_neg() \
+do { /* sub %g0, r_A, r_A */ \
+ *prog++ = SUB | RS1(G0) | RS2(r_A) | RD(r_A); \
+} while (0)
+
+#define emit_reg_move(FROM, TO) \
+do { /* or %g0, FROM, TO */ \
+ *prog++ = OR | RS1(G0) | RS2(FROM) | RD(TO); \
+} while (0)
+
+#define emit_clear(REG) \
+do { /* or %g0, %g0, REG */ \
+ *prog++ = OR | RS1(G0) | RS2(G0) | RD(REG); \
+} while (0)
+
+#define emit_set_const(K, REG) \
+do { /* sethi %hi(K), REG */ \
+ *prog++ = SETHI(K, REG); \
+ /* or REG, %lo(K), REG */ \
+ *prog++ = OR_LO(K, REG); \
+} while (0)
+
+ /* Emit
+ *
+ * OP r_A, r_X, r_A
+ */
+#define emit_alu_X(OPCODE) \
+do { \
+ seen |= SEEN_XREG; \
+ *prog++ = OPCODE | RS1(r_A) | RS2(r_X) | RD(r_A); \
+} while (0)
+
+ /* Emit either:
+ *
+ * OP r_A, K, r_A
+ *
+ * or
+ *
+ * sethi %hi(K), r_TMP
+ * or r_TMP, %lo(K), r_TMP
+ * OP r_A, r_TMP, r_A
+ *
+ * depending upon whether K fits in a signed 13-bit
+ * immediate instruction field. Emit nothing if K
+ * is zero.
+ */
+#define emit_alu_K(OPCODE, K) \
+do { \
+ if (K || OPCODE = AND || OPCODE = MUL) { \
+ unsigned int _insn = OPCODE; \
+ _insn |= RS1(r_A) | RD(r_A); \
+ if (is_simm13(K)) { \
+ *prog++ = _insn | IMMED | S13(K); \
+ } else { \
+ emit_set_const(K, r_TMP); \
+ *prog++ = _insn | RS2(r_TMP); \
+ } \
+ } \
+} while (0)
+
+#define emit_loadimm(K, DEST) \
+do { \
+ if (is_simm13(K)) { \
+ /* or %g0, K, DEST */ \
+ *prog++ = OR | IMMED | RS1(G0) | S13(K) | RD(DEST); \
+ } else { \
+ emit_set_const(K, DEST); \
+ } \
+} while (0)
+
+#define emit_loadptr(BASE, STRUCT, FIELD, DEST) \
+do { unsigned int _off = offsetof(STRUCT, FIELD); \
+ BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(void *)); \
+ *prog++ = LDPTRI | RS1(BASE) | S13(_off) | RD(DEST); \
+} while (0)
+
+#define emit_load32(BASE, STRUCT, FIELD, DEST) \
+do { unsigned int _off = offsetof(STRUCT, FIELD); \
+ BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(u32)); \
+ *prog++ = LD32I | RS1(BASE) | S13(_off) | RD(DEST); \
+} while (0)
+
+#define emit_load16(BASE, STRUCT, FIELD, DEST) \
+do { unsigned int _off = offsetof(STRUCT, FIELD); \
+ BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(u16)); \
+ *prog++ = LD16I | RS1(BASE) | S13(_off) | RD(DEST); \
+} while (0)
+
+#define __emit_load8(BASE, STRUCT, FIELD, DEST) \
+do { unsigned int _off = offsetof(STRUCT, FIELD); \
+ *prog++ = LD8I | RS1(BASE) | S13(_off) | RD(DEST); \
+} while (0)
+
+#define emit_load8(BASE, STRUCT, FIELD, DEST) \
+do { BUILD_BUG_ON(FIELD_SIZEOF(STRUCT, FIELD) != sizeof(u8)); \
+ __emit_load8(BASE, STRUCT, FIELD, DEST); \
+} while (0)
+
+#ifdef CONFIG_SPARC64
+#define BIAS (STACK_BIAS - 4)
+#else
+#define BIAS (-4)
+#endif
+
+#define emit_ldmem(OFF, DEST) \
+do { *prog++ = LD32I | RS1(SP) | S13(BIAS - (OFF)) | RD(DEST); \
+} while (0)
+
+#define emit_stmem(OFF, SRC) \
+do { *prog++ = ST32I | RS1(SP) | S13(BIAS - (OFF)) | RD(SRC); \
+} while (0)
+
+#ifdef CONFIG_SMP
+#ifdef CONFIG_SPARC64
+#define emit_load_cpu(REG) \
+ emit_load16(G6, struct thread_info, cpu, REG)
+#else
+#define emit_load_cpu(REG) \
+ emit_load32(G6, struct thread_info, cpu, REG)
+#endif
+#else
+#define emit_load_cpu(REG) emit_clear(REG)
+#endif
+
+#define emit_skb_loadptr(FIELD, DEST) \
+ emit_loadptr(r_SKB, struct sk_buff, FIELD, DEST)
+#define emit_skb_load32(FIELD, DEST) \
+ emit_load32(r_SKB, struct sk_buff, FIELD, DEST)
+#define emit_skb_load16(FIELD, DEST) \
+ emit_load16(r_SKB, struct sk_buff, FIELD, DEST)
+#define __emit_skb_load8(FIELD, DEST) \
+ __emit_load8(r_SKB, struct sk_buff, FIELD, DEST)
+#define emit_skb_load8(FIELD, DEST) \
+ emit_load8(r_SKB, struct sk_buff, FIELD, DEST)
+
+#define emit_jmpl(BASE, IMM_OFF, LREG) \
+ *prog++ = (JMPL | IMMED | RS1(BASE) | S13(IMM_OFF) | RD(LREG))
+
+#define emit_call(FUNC) \
+do { void *_here = image + addrs[i] - 8; \
+ unsigned int _off = (void *)(FUNC) - _here; \
+ *prog++ = CALL | (((_off) >> 2) & 0x3fffffff); \
+ emit_nop(); \
+} while (0)
+
+#define emit_branch(BR_OPC, DEST) \
+do { unsigned int _here = addrs[i] - 8; \
+ *prog++ = BR_OPC | WDISP22((DEST) - _here); \
+} while (0)
+
+#define emit_branch_off(BR_OPC, OFF) \
+do { *prog++ = BR_OPC | WDISP22(OFF); \
+} while (0)
+
+#define emit_jump(DEST) emit_branch(BA, DEST)
+
+#define emit_read_y(REG) *prog++ = RD_Y | RD(REG)
+#define emit_write_y(REG) *prog++ = WR_Y | IMMED | RS1(REG) | S13(0)
+
+#define emit_cmp(R1, R2) \
+ *prog++ = (SUBCC | RS1(R1) | RS2(R2) | RD(G0))
+
+#define emit_cmpi(R1, IMM) \
+ *prog++ = (SUBCC | IMMED | RS1(R1) | S13(IMM) | RD(G0));
+
+#define emit_btst(R1, R2) \
+ *prog++ = (ANDCC | RS1(R1) | RS2(R2) | RD(G0))
+
+#define emit_btsti(R1, IMM) \
+ *prog++ = (ANDCC | IMMED | RS1(R1) | S13(IMM) | RD(G0));
+
+#define emit_sub(R1, R2, R3) \
+ *prog++ = (SUB | RS1(R1) | RS2(R2) | RD(R3))
+
+#define emit_subi(R1, IMM, R3) \
+ *prog++ = (SUB | IMMED | RS1(R1) | S13(IMM) | RD(R3))
+
+#define emit_add(R1, R2, R3) \
+ *prog++ = (ADD | RS1(R1) | RS2(R2) | RD(R3))
+
+#define emit_addi(R1, IMM, R3) \
+ *prog++ = (ADD | IMMED | RS1(R1) | S13(IMM) | RD(R3))
+
+#define emit_and(R1, R2, R3) \
+ *prog++ = (AND | RS1(R1) | RS2(R2) | RD(R3))
+
+#define emit_andi(R1, IMM, R3) \
+ *prog++ = (AND | IMMED | RS1(R1) | S13(IMM) | RD(R3))
+
+#define emit_alloc_stack(SZ) \
+ *prog++ = (SUB | IMMED | RS1(SP) | S13(SZ) | RD(SP))
+
+#define emit_release_stack(SZ) \
+ *prog++ = (ADD | IMMED | RS1(SP) | S13(SZ) | RD(SP))
+
+/* A note about branch offset calculations. The addrs[] array,
+ * indexed by BPF instruction, records the address after all the
+ * sparc instructions emitted for that BPF instruction.
+ *
+ * The most common case is to emit a branch at the end of such
+ * a code sequence. So this would be two instructions, the
+ * branch and it's delay slot.
+ *
+ * Therefore by default the branch emitters calculate the branch
+ * offset field as:
+ *
+ * destination - (addrs[i] - 8)
+ *
+ * This "addrs[i] - 8" is the address of the branch itself or
+ * what "." would be in assembler notation. The "8" part is
+ * how we take into consideration the branch and it's delay
+ * slot mentioned above.
+ *
+ * Sometimes we need to emit a branch earlier in the code
+ * sequence. And in these situations we adjust "destination"
+ * to accommodate this difference. For example, if we needed
+ * to emit a branch (and it's delay slot) right before the
+ * final instruction emitted for a BPF opcode, we'd use
+ * "destination + 4" instead of just plain "destination" above.
+ *
+ * This is why you see all of these funny emit_branch() and
+ * emit_jump() calls with adjusted offsets.
+ */
+
+void bpf_jit_compile(struct bpf_prog *fp)
+{
+ unsigned int cleanup_addr, proglen, oldproglen = 0;
+ u32 temp[8], *prog, *func, seen = 0, pass;
+ const struct sock_filter *filter = fp->insns;
+ int i, flen = fp->len, pc_ret0 = -1;
+ unsigned int *addrs;
+ void *image;
+
+ if (!bpf_jit_enable)
+ return;
+
+ addrs = kmalloc(flen * sizeof(*addrs), GFP_KERNEL);
+ if (addrs = NULL)
+ return;
+
+ /* Before first pass, make a rough estimation of addrs[]
+ * each bpf instruction is translated to less than 64 bytes
+ */
+ for (proglen = 0, i = 0; i < flen; i++) {
+ proglen += 64;
+ addrs[i] = proglen;
+ }
+ cleanup_addr = proglen; /* epilogue address */
+ image = NULL;
+ for (pass = 0; pass < 10; pass++) {
+ u8 seen_or_pass0 = (pass = 0) ? (SEEN_XREG | SEEN_DATAREF | SEEN_MEM) : seen;
+
+ /* no prologue/epilogue for trivial filters (RET something) */
+ proglen = 0;
+ prog = temp;
+
+ /* Prologue */
+ if (seen_or_pass0) {
+ if (seen_or_pass0 & SEEN_MEM) {
+ unsigned int sz = BASE_STACKFRAME;
+ sz += BPF_MEMWORDS * sizeof(u32);
+ emit_alloc_stack(sz);
+ }
+
+ /* Make sure we dont leek kernel memory. */
+ if (seen_or_pass0 & SEEN_XREG)
+ emit_clear(r_X);
+
+ /* If this filter needs to access skb data,
+ * load %o4 and %o5 with:
+ * %o4 = skb->len - skb->data_len
+ * %o5 = skb->data
+ * And also back up %o7 into r_saved_O7 so we can
+ * invoke the stubs using 'call'.
+ */
+ if (seen_or_pass0 & SEEN_DATAREF) {
+ emit_load32(r_SKB, struct sk_buff, len, r_HEADLEN);
+ emit_load32(r_SKB, struct sk_buff, data_len, r_TMP);
+ emit_sub(r_HEADLEN, r_TMP, r_HEADLEN);
+ emit_loadptr(r_SKB, struct sk_buff, data, r_SKB_DATA);
+ }
+ }
+ emit_reg_move(O7, r_saved_O7);
+
+ /* Make sure we dont leak kernel information to the user. */
+ if (bpf_needs_clear_a(&filter[0]))
+ emit_clear(r_A); /* A = 0 */
+
+ for (i = 0; i < flen; i++) {
+ unsigned int K = filter[i].k;
+ unsigned int t_offset;
+ unsigned int f_offset;
+ u32 t_op, f_op;
+ u16 code = bpf_anc_helper(&filter[i]);
+ int ilen;
+
+ switch (code) {
+ case BPF_ALU | BPF_ADD | BPF_X: /* A += X; */
+ emit_alu_X(ADD);
+ break;
+ case BPF_ALU | BPF_ADD | BPF_K: /* A += K; */
+ emit_alu_K(ADD, K);
+ break;
+ case BPF_ALU | BPF_SUB | BPF_X: /* A -= X; */
+ emit_alu_X(SUB);
+ break;
+ case BPF_ALU | BPF_SUB | BPF_K: /* A -= K */
+ emit_alu_K(SUB, K);
+ break;
+ case BPF_ALU | BPF_AND | BPF_X: /* A &= X */
+ emit_alu_X(AND);
+ break;
+ case BPF_ALU | BPF_AND | BPF_K: /* A &= K */
+ emit_alu_K(AND, K);
+ break;
+ case BPF_ALU | BPF_OR | BPF_X: /* A |= X */
+ emit_alu_X(OR);
+ break;
+ case BPF_ALU | BPF_OR | BPF_K: /* A |= K */
+ emit_alu_K(OR, K);
+ break;
+ case BPF_ANC | SKF_AD_ALU_XOR_X: /* A ^= X; */
+ case BPF_ALU | BPF_XOR | BPF_X:
+ emit_alu_X(XOR);
+ break;
+ case BPF_ALU | BPF_XOR | BPF_K: /* A ^= K */
+ emit_alu_K(XOR, K);
+ break;
+ case BPF_ALU | BPF_LSH | BPF_X: /* A <<= X */
+ emit_alu_X(SLL);
+ break;
+ case BPF_ALU | BPF_LSH | BPF_K: /* A <<= K */
+ emit_alu_K(SLL, K);
+ break;
+ case BPF_ALU | BPF_RSH | BPF_X: /* A >>= X */
+ emit_alu_X(SRL);
+ break;
+ case BPF_ALU | BPF_RSH | BPF_K: /* A >>= K */
+ emit_alu_K(SRL, K);
+ break;
+ case BPF_ALU | BPF_MUL | BPF_X: /* A *= X; */
+ emit_alu_X(MUL);
+ break;
+ case BPF_ALU | BPF_MUL | BPF_K: /* A *= K */
+ emit_alu_K(MUL, K);
+ break;
+ case BPF_ALU | BPF_DIV | BPF_K: /* A /= K with K != 0*/
+ if (K = 1)
+ break;
+ emit_write_y(G0);
+#ifdef CONFIG_SPARC32
+ /* The Sparc v8 architecture requires
+ * three instructions between a %y
+ * register write and the first use.
+ */
+ emit_nop();
+ emit_nop();
+ emit_nop();
+#endif
+ emit_alu_K(DIV, K);
+ break;
+ case BPF_ALU | BPF_DIV | BPF_X: /* A /= X; */
+ emit_cmpi(r_X, 0);
+ if (pc_ret0 > 0) {
+ t_offset = addrs[pc_ret0 - 1];
+#ifdef CONFIG_SPARC32
+ emit_branch(BE, t_offset + 20);
+#else
+ emit_branch(BE, t_offset + 8);
+#endif
+ emit_nop(); /* delay slot */
+ } else {
+ emit_branch_off(BNE, 16);
+ emit_nop();
+#ifdef CONFIG_SPARC32
+ emit_jump(cleanup_addr + 20);
+#else
+ emit_jump(cleanup_addr + 8);
+#endif
+ emit_clear(r_A);
+ }
+ emit_write_y(G0);
+#ifdef CONFIG_SPARC32
+ /* The Sparc v8 architecture requires
+ * three instructions between a %y
+ * register write and the first use.
+ */
+ emit_nop();
+ emit_nop();
+ emit_nop();
+#endif
+ emit_alu_X(DIV);
+ break;
+ case BPF_ALU | BPF_NEG:
+ emit_neg();
+ break;
+ case BPF_RET | BPF_K:
+ if (!K) {
+ if (pc_ret0 = -1)
+ pc_ret0 = i;
+ emit_clear(r_A);
+ } else {
+ emit_loadimm(K, r_A);
+ }
+ /* Fallthrough */
+ case BPF_RET | BPF_A:
+ if (seen_or_pass0) {
+ if (i != flen - 1) {
+ emit_jump(cleanup_addr);
+ emit_nop();
+ break;
+ }
+ if (seen_or_pass0 & SEEN_MEM) {
+ unsigned int sz = BASE_STACKFRAME;
+ sz += BPF_MEMWORDS * sizeof(u32);
+ emit_release_stack(sz);
+ }
+ }
+ /* jmpl %r_saved_O7 + 8, %g0 */
+ emit_jmpl(r_saved_O7, 8, G0);
+ emit_reg_move(r_A, O0); /* delay slot */
+ break;
+ case BPF_MISC | BPF_TAX:
+ seen |= SEEN_XREG;
+ emit_reg_move(r_A, r_X);
+ break;
+ case BPF_MISC | BPF_TXA:
+ seen |= SEEN_XREG;
+ emit_reg_move(r_X, r_A);
+ break;
+ case BPF_ANC | SKF_AD_CPU:
+ emit_load_cpu(r_A);
+ break;
+ case BPF_ANC | SKF_AD_PROTOCOL:
+ emit_skb_load16(protocol, r_A);
+ break;
+ case BPF_ANC | SKF_AD_PKTTYPE:
+ __emit_skb_load8(__pkt_type_offset, r_A);
+ emit_andi(r_A, PKT_TYPE_MAX, r_A);
+ emit_alu_K(SRL, 5);
+ break;
+ case BPF_ANC | SKF_AD_IFINDEX:
+ emit_skb_loadptr(dev, r_A);
+ emit_cmpi(r_A, 0);
+ emit_branch(BE_PTR, cleanup_addr + 4);
+ emit_nop();
+ emit_load32(r_A, struct net_device, ifindex, r_A);
+ break;
+ case BPF_ANC | SKF_AD_MARK:
+ emit_skb_load32(mark, r_A);
+ break;
+ case BPF_ANC | SKF_AD_QUEUE:
+ emit_skb_load16(queue_mapping, r_A);
+ break;
+ case BPF_ANC | SKF_AD_HATYPE:
+ emit_skb_loadptr(dev, r_A);
+ emit_cmpi(r_A, 0);
+ emit_branch(BE_PTR, cleanup_addr + 4);
+ emit_nop();
+ emit_load16(r_A, struct net_device, type, r_A);
+ break;
+ case BPF_ANC | SKF_AD_RXHASH:
+ emit_skb_load32(hash, r_A);
+ break;
+ case BPF_ANC | SKF_AD_VLAN_TAG:
+ case BPF_ANC | SKF_AD_VLAN_TAG_PRESENT:
+ emit_skb_load16(vlan_tci, r_A);
+ if (code != (BPF_ANC | SKF_AD_VLAN_TAG)) {
+ emit_alu_K(SRL, 12);
+ emit_andi(r_A, 1, r_A);
+ } else {
+ emit_loadimm(~VLAN_TAG_PRESENT, r_TMP);
+ emit_and(r_A, r_TMP, r_A);
+ }
+ break;
+ case BPF_LD | BPF_W | BPF_LEN:
+ emit_skb_load32(len, r_A);
+ break;
+ case BPF_LDX | BPF_W | BPF_LEN:
+ emit_skb_load32(len, r_X);
+ break;
+ case BPF_LD | BPF_IMM:
+ emit_loadimm(K, r_A);
+ break;
+ case BPF_LDX | BPF_IMM:
+ emit_loadimm(K, r_X);
+ break;
+ case BPF_LD | BPF_MEM:
+ seen |= SEEN_MEM;
+ emit_ldmem(K * 4, r_A);
+ break;
+ case BPF_LDX | BPF_MEM:
+ seen |= SEEN_MEM | SEEN_XREG;
+ emit_ldmem(K * 4, r_X);
+ break;
+ case BPF_ST:
+ seen |= SEEN_MEM;
+ emit_stmem(K * 4, r_A);
+ break;
+ case BPF_STX:
+ seen |= SEEN_MEM | SEEN_XREG;
+ emit_stmem(K * 4, r_X);
+ break;
+
+#define CHOOSE_LOAD_FUNC(K, func) \
+ ((int)K < 0 ? ((int)K >= SKF_LL_OFF ? func##_negative_offset : func) : func##_positive_offset)
+
+ case BPF_LD | BPF_W | BPF_ABS:
+ func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_word);
+common_load: seen |= SEEN_DATAREF;
+ emit_loadimm(K, r_OFF);
+ emit_call(func);
+ break;
+ case BPF_LD | BPF_H | BPF_ABS:
+ func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_half);
+ goto common_load;
+ case BPF_LD | BPF_B | BPF_ABS:
+ func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_byte);
+ goto common_load;
+ case BPF_LDX | BPF_B | BPF_MSH:
+ func = CHOOSE_LOAD_FUNC(K, bpf_jit_load_byte_msh);
+ goto common_load;
+ case BPF_LD | BPF_W | BPF_IND:
+ func = bpf_jit_load_word;
+common_load_ind: seen |= SEEN_DATAREF | SEEN_XREG;
+ if (K) {
+ if (is_simm13(K)) {
+ emit_addi(r_X, K, r_OFF);
+ } else {
+ emit_loadimm(K, r_TMP);
+ emit_add(r_X, r_TMP, r_OFF);
+ }
+ } else {
+ emit_reg_move(r_X, r_OFF);
+ }
+ emit_call(func);
+ break;
+ case BPF_LD | BPF_H | BPF_IND:
+ func = bpf_jit_load_half;
+ goto common_load_ind;
+ case BPF_LD | BPF_B | BPF_IND:
+ func = bpf_jit_load_byte;
+ goto common_load_ind;
+ case BPF_JMP | BPF_JA:
+ emit_jump(addrs[i + K]);
+ emit_nop();
+ break;
+
+#define COND_SEL(CODE, TOP, FOP) \
+ case CODE: \
+ t_op = TOP; \
+ f_op = FOP; \
+ goto cond_branch
+
+ COND_SEL(BPF_JMP | BPF_JGT | BPF_K, BGU, BLEU);
+ COND_SEL(BPF_JMP | BPF_JGE | BPF_K, BGEU, BLU);
+ COND_SEL(BPF_JMP | BPF_JEQ | BPF_K, BE, BNE);
+ COND_SEL(BPF_JMP | BPF_JSET | BPF_K, BNE, BE);
+ COND_SEL(BPF_JMP | BPF_JGT | BPF_X, BGU, BLEU);
+ COND_SEL(BPF_JMP | BPF_JGE | BPF_X, BGEU, BLU);
+ COND_SEL(BPF_JMP | BPF_JEQ | BPF_X, BE, BNE);
+ COND_SEL(BPF_JMP | BPF_JSET | BPF_X, BNE, BE);
+
+cond_branch: f_offset = addrs[i + filter[i].jf];
+ t_offset = addrs[i + filter[i].jt];
+
+ /* same targets, can avoid doing the test :) */
+ if (filter[i].jt = filter[i].jf) {
+ emit_jump(t_offset);
+ emit_nop();
+ break;
+ }
+
+ switch (code) {
+ case BPF_JMP | BPF_JGT | BPF_X:
+ case BPF_JMP | BPF_JGE | BPF_X:
+ case BPF_JMP | BPF_JEQ | BPF_X:
+ seen |= SEEN_XREG;
+ emit_cmp(r_A, r_X);
+ break;
+ case BPF_JMP | BPF_JSET | BPF_X:
+ seen |= SEEN_XREG;
+ emit_btst(r_A, r_X);
+ break;
+ case BPF_JMP | BPF_JEQ | BPF_K:
+ case BPF_JMP | BPF_JGT | BPF_K:
+ case BPF_JMP | BPF_JGE | BPF_K:
+ if (is_simm13(K)) {
+ emit_cmpi(r_A, K);
+ } else {
+ emit_loadimm(K, r_TMP);
+ emit_cmp(r_A, r_TMP);
+ }
+ break;
+ case BPF_JMP | BPF_JSET | BPF_K:
+ if (is_simm13(K)) {
+ emit_btsti(r_A, K);
+ } else {
+ emit_loadimm(K, r_TMP);
+ emit_btst(r_A, r_TMP);
+ }
+ break;
+ }
+ if (filter[i].jt != 0) {
+ if (filter[i].jf)
+ t_offset += 8;
+ emit_branch(t_op, t_offset);
+ emit_nop(); /* delay slot */
+ if (filter[i].jf) {
+ emit_jump(f_offset);
+ emit_nop();
+ }
+ break;
+ }
+ emit_branch(f_op, f_offset);
+ emit_nop(); /* delay slot */
+ break;
+
+ default:
+ /* hmm, too complex filter, give up with jit compiler */
+ goto out;
+ }
+ ilen = (void *) prog - (void *) temp;
+ if (image) {
+ if (unlikely(proglen + ilen > oldproglen)) {
+ pr_err("bpb_jit_compile fatal error\n");
+ kfree(addrs);
+ module_memfree(image);
+ return;
+ }
+ memcpy(image + proglen, temp, ilen);
+ }
+ proglen += ilen;
+ addrs[i] = proglen;
+ prog = temp;
+ }
+ /* last bpf instruction is always a RET :
+ * use it to give the cleanup instruction(s) addr
+ */
+ cleanup_addr = proglen - 8; /* jmpl; mov r_A,%o0; */
+ if (seen_or_pass0 & SEEN_MEM)
+ cleanup_addr -= 4; /* add %sp, X, %sp; */
+
+ if (image) {
+ if (proglen != oldproglen)
+ pr_err("bpb_jit_compile proglen=%u != oldproglen=%u\n",
+ proglen, oldproglen);
+ break;
+ }
+ if (proglen = oldproglen) {
+ image = module_alloc(proglen);
+ if (!image)
+ goto out;
+ }
+ oldproglen = proglen;
+ }
+
+ if (bpf_jit_enable > 1)
+ bpf_jit_dump(flen, proglen, pass + 1, image);
+
+ if (image) {
+ bpf_flush_icache(image, image + proglen);
+ fp->bpf_func = (void *)image;
+ fp->jited = 1;
+ }
+out:
+ kfree(addrs);
+ return;
+}
+
+void bpf_jit_free(struct bpf_prog *fp)
+{
+ if (fp->jited)
+ module_memfree(fp->bpf_func);
+
+ bpf_prog_unlock_free(fp);
+}
diff --git a/arch/sparc/net/bpf_jit_comp_64.c b/arch/sparc/net/bpf_jit_comp_64.c
new file mode 100644
index 0000000..49b5f65
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_comp_64.c
@@ -0,0 +1 @@
+#include "bpf_jit_comp_32.c"
--
2.1.2.532.g19b5d50
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH net-next 1/2] sparc: Split BPF JIT into 32-bit and 64-bit.
2017-04-18 18:58 ` David Miller
@ 2017-04-18 19:31 ` Sam Ravnborg
-1 siblings, 0 replies; 6+ messages in thread
From: Sam Ravnborg @ 2017-04-18 19:31 UTC (permalink / raw)
To: David Miller; +Cc: sparclinux, netdev, ast, daniel
On Tue, Apr 18, 2017 at 02:58:06PM -0400, David Miller wrote:
>
> This is in preparation for adding the 64-bit eBPF JIT.
>
> Signed-off-by: David S. Miller <davem@davemloft.net>
> ---
> arch/sparc/net/Makefile | 2 +-
> arch/sparc/net/bpf_jit.h | 68 ----
> arch/sparc/net/bpf_jit_32.h | 68 ++++
> arch/sparc/net/bpf_jit_asm.S | 208 ----------
> arch/sparc/net/bpf_jit_asm_32.S | 208 ++++++++++
> arch/sparc/net/bpf_jit_asm_64.S | 1 +
> arch/sparc/net/bpf_jit_comp.c | 815 ---------------------------------------
> arch/sparc/net/bpf_jit_comp_32.c | 815 +++++++++++++++++++++++++++++++++++++++
> arch/sparc/net/bpf_jit_comp_64.c | 1 +
> 9 files changed, 1094 insertions(+), 1092 deletions(-)
> delete mode 100644 arch/sparc/net/bpf_jit.h
> create mode 100644 arch/sparc/net/bpf_jit_32.h
> delete mode 100644 arch/sparc/net/bpf_jit_asm.S
> create mode 100644 arch/sparc/net/bpf_jit_asm_32.S
> create mode 100644 arch/sparc/net/bpf_jit_asm_64.S
> delete mode 100644 arch/sparc/net/bpf_jit_comp.c
> create mode 100644 arch/sparc/net/bpf_jit_comp_32.c
> create mode 100644 arch/sparc/net/bpf_jit_comp_64.c
Adding options "-M -C" to git format-patch would have helped readability
of this patch.
As it is now we cannot see what changes were made to the varoious files
when they were renamed.
(I trust you have made no irrelevant but wanted to mention it anyway)
Sam
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH net-next 1/2] sparc: Split BPF JIT into 32-bit and 64-bit.
@ 2017-04-18 19:31 ` Sam Ravnborg
0 siblings, 0 replies; 6+ messages in thread
From: Sam Ravnborg @ 2017-04-18 19:31 UTC (permalink / raw)
To: David Miller; +Cc: sparclinux, netdev, ast, daniel
On Tue, Apr 18, 2017 at 02:58:06PM -0400, David Miller wrote:
>
> This is in preparation for adding the 64-bit eBPF JIT.
>
> Signed-off-by: David S. Miller <davem@davemloft.net>
> ---
> arch/sparc/net/Makefile | 2 +-
> arch/sparc/net/bpf_jit.h | 68 ----
> arch/sparc/net/bpf_jit_32.h | 68 ++++
> arch/sparc/net/bpf_jit_asm.S | 208 ----------
> arch/sparc/net/bpf_jit_asm_32.S | 208 ++++++++++
> arch/sparc/net/bpf_jit_asm_64.S | 1 +
> arch/sparc/net/bpf_jit_comp.c | 815 ---------------------------------------
> arch/sparc/net/bpf_jit_comp_32.c | 815 +++++++++++++++++++++++++++++++++++++++
> arch/sparc/net/bpf_jit_comp_64.c | 1 +
> 9 files changed, 1094 insertions(+), 1092 deletions(-)
> delete mode 100644 arch/sparc/net/bpf_jit.h
> create mode 100644 arch/sparc/net/bpf_jit_32.h
> delete mode 100644 arch/sparc/net/bpf_jit_asm.S
> create mode 100644 arch/sparc/net/bpf_jit_asm_32.S
> create mode 100644 arch/sparc/net/bpf_jit_asm_64.S
> delete mode 100644 arch/sparc/net/bpf_jit_comp.c
> create mode 100644 arch/sparc/net/bpf_jit_comp_32.c
> create mode 100644 arch/sparc/net/bpf_jit_comp_64.c
Adding options "-M -C" to git format-patch would have helped readability
of this patch.
As it is now we cannot see what changes were made to the varoious files
when they were renamed.
(I trust you have made no irrelevant but wanted to mention it anyway)
Sam
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH net-next 1/2] sparc: Split BPF JIT into 32-bit and 64-bit.
2017-04-18 19:31 ` Sam Ravnborg
@ 2017-04-18 19:35 ` David Miller
-1 siblings, 0 replies; 6+ messages in thread
From: David Miller @ 2017-04-18 19:35 UTC (permalink / raw)
To: sam; +Cc: sparclinux, netdev, ast, daniel
From: Sam Ravnborg <sam@ravnborg.org>
Date: Tue, 18 Apr 2017 21:31:57 +0200
> On Tue, Apr 18, 2017 at 02:58:06PM -0400, David Miller wrote:
>>
>> This is in preparation for adding the 64-bit eBPF JIT.
>>
>> Signed-off-by: David S. Miller <davem@davemloft.net>
>> ---
>> arch/sparc/net/Makefile | 2 +-
>> arch/sparc/net/bpf_jit.h | 68 ----
>> arch/sparc/net/bpf_jit_32.h | 68 ++++
>> arch/sparc/net/bpf_jit_asm.S | 208 ----------
>> arch/sparc/net/bpf_jit_asm_32.S | 208 ++++++++++
>> arch/sparc/net/bpf_jit_asm_64.S | 1 +
>> arch/sparc/net/bpf_jit_comp.c | 815 ---------------------------------------
>> arch/sparc/net/bpf_jit_comp_32.c | 815 +++++++++++++++++++++++++++++++++++++++
>> arch/sparc/net/bpf_jit_comp_64.c | 1 +
>> 9 files changed, 1094 insertions(+), 1092 deletions(-)
>> delete mode 100644 arch/sparc/net/bpf_jit.h
>> create mode 100644 arch/sparc/net/bpf_jit_32.h
>> delete mode 100644 arch/sparc/net/bpf_jit_asm.S
>> create mode 100644 arch/sparc/net/bpf_jit_asm_32.S
>> create mode 100644 arch/sparc/net/bpf_jit_asm_64.S
>> delete mode 100644 arch/sparc/net/bpf_jit_comp.c
>> create mode 100644 arch/sparc/net/bpf_jit_comp_32.c
>> create mode 100644 arch/sparc/net/bpf_jit_comp_64.c
>
> Adding options "-M -C" to git format-patch would have helped readability
> of this patch.
> As it is now we cannot see what changes were made to the varoious files
> when they were renamed.
>
> (I trust you have made no irrelevant but wanted to mention it anyway)
My bad, I'll remember to do this next time:
Since it's so small, here it is for reference:
====================
>From c651a5d37afed8461adc3f2824cae1d7facd2e7a Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Mon, 17 Apr 2017 18:25:07 -0700
Subject: [PATCH 1/2] sparc: Split BPF JIT into 32-bit and 64-bit.
This is in preparation for adding the 64-bit eBPF JIT.
Signed-off-by: David S. Miller <davem@davemloft.net>
---
arch/sparc/net/Makefile | 2 +-
arch/sparc/net/{bpf_jit.h => bpf_jit_32.h} | 0
arch/sparc/net/{bpf_jit_asm.S => bpf_jit_asm_32.S} | 2 +-
arch/sparc/net/bpf_jit_asm_64.S | 1 +
arch/sparc/net/{bpf_jit_comp.c => bpf_jit_comp_32.c} | 2 +-
arch/sparc/net/bpf_jit_comp_64.c | 1 +
6 files changed, 5 insertions(+), 3 deletions(-)
rename arch/sparc/net/{bpf_jit.h => bpf_jit_32.h} (100%)
rename arch/sparc/net/{bpf_jit_asm.S => bpf_jit_asm_32.S} (99%)
create mode 100644 arch/sparc/net/bpf_jit_asm_64.S
rename arch/sparc/net/{bpf_jit_comp.c => bpf_jit_comp_32.c} (99%)
create mode 100644 arch/sparc/net/bpf_jit_comp_64.c
diff --git a/arch/sparc/net/Makefile b/arch/sparc/net/Makefile
index 1306a58..76fa8e9 100644
--- a/arch/sparc/net/Makefile
+++ b/arch/sparc/net/Makefile
@@ -1,4 +1,4 @@
#
# Arch-specific network modules
#
-obj-$(CONFIG_BPF_JIT) += bpf_jit_asm.o bpf_jit_comp.o
+obj-$(CONFIG_BPF_JIT) += bpf_jit_asm_$(BITS).o bpf_jit_comp_$(BITS).o
diff --git a/arch/sparc/net/bpf_jit.h b/arch/sparc/net/bpf_jit_32.h
similarity index 100%
rename from arch/sparc/net/bpf_jit.h
rename to arch/sparc/net/bpf_jit_32.h
diff --git a/arch/sparc/net/bpf_jit_asm.S b/arch/sparc/net/bpf_jit_asm_32.S
similarity index 99%
rename from arch/sparc/net/bpf_jit_asm.S
rename to arch/sparc/net/bpf_jit_asm_32.S
index 8c83f4b..5632cdc 100644
--- a/arch/sparc/net/bpf_jit_asm.S
+++ b/arch/sparc/net/bpf_jit_asm_32.S
@@ -1,6 +1,6 @@
#include <asm/ptrace.h>
-#include "bpf_jit.h"
+#include "bpf_jit_32.h"
#ifdef CONFIG_SPARC64
#define SAVE_SZ 176
diff --git a/arch/sparc/net/bpf_jit_asm_64.S b/arch/sparc/net/bpf_jit_asm_64.S
new file mode 100644
index 0000000..6fb023f
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_asm_64.S
@@ -0,0 +1 @@
+#include "bpf_jit_asm_32.S"
diff --git a/arch/sparc/net/bpf_jit_comp.c b/arch/sparc/net/bpf_jit_comp_32.c
similarity index 99%
rename from arch/sparc/net/bpf_jit_comp.c
rename to arch/sparc/net/bpf_jit_comp_32.c
index a6d9204..83fc41d 100644
--- a/arch/sparc/net/bpf_jit_comp.c
+++ b/arch/sparc/net/bpf_jit_comp_32.c
@@ -8,7 +8,7 @@
#include <asm/cacheflush.h>
#include <asm/ptrace.h>
-#include "bpf_jit.h"
+#include "bpf_jit_32.h"
int bpf_jit_enable __read_mostly;
diff --git a/arch/sparc/net/bpf_jit_comp_64.c b/arch/sparc/net/bpf_jit_comp_64.c
new file mode 100644
index 0000000..49b5f65
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_comp_64.c
@@ -0,0 +1 @@
+#include "bpf_jit_comp_32.c"
--
2.1.2.532.g19b5d50
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH net-next 1/2] sparc: Split BPF JIT into 32-bit and 64-bit.
@ 2017-04-18 19:35 ` David Miller
0 siblings, 0 replies; 6+ messages in thread
From: David Miller @ 2017-04-18 19:35 UTC (permalink / raw)
To: sam; +Cc: sparclinux, netdev, ast, daniel
From: Sam Ravnborg <sam@ravnborg.org>
Date: Tue, 18 Apr 2017 21:31:57 +0200
> On Tue, Apr 18, 2017 at 02:58:06PM -0400, David Miller wrote:
>>
>> This is in preparation for adding the 64-bit eBPF JIT.
>>
>> Signed-off-by: David S. Miller <davem@davemloft.net>
>> ---
>> arch/sparc/net/Makefile | 2 +-
>> arch/sparc/net/bpf_jit.h | 68 ----
>> arch/sparc/net/bpf_jit_32.h | 68 ++++
>> arch/sparc/net/bpf_jit_asm.S | 208 ----------
>> arch/sparc/net/bpf_jit_asm_32.S | 208 ++++++++++
>> arch/sparc/net/bpf_jit_asm_64.S | 1 +
>> arch/sparc/net/bpf_jit_comp.c | 815 ---------------------------------------
>> arch/sparc/net/bpf_jit_comp_32.c | 815 +++++++++++++++++++++++++++++++++++++++
>> arch/sparc/net/bpf_jit_comp_64.c | 1 +
>> 9 files changed, 1094 insertions(+), 1092 deletions(-)
>> delete mode 100644 arch/sparc/net/bpf_jit.h
>> create mode 100644 arch/sparc/net/bpf_jit_32.h
>> delete mode 100644 arch/sparc/net/bpf_jit_asm.S
>> create mode 100644 arch/sparc/net/bpf_jit_asm_32.S
>> create mode 100644 arch/sparc/net/bpf_jit_asm_64.S
>> delete mode 100644 arch/sparc/net/bpf_jit_comp.c
>> create mode 100644 arch/sparc/net/bpf_jit_comp_32.c
>> create mode 100644 arch/sparc/net/bpf_jit_comp_64.c
>
> Adding options "-M -C" to git format-patch would have helped readability
> of this patch.
> As it is now we cannot see what changes were made to the varoious files
> when they were renamed.
>
> (I trust you have made no irrelevant but wanted to mention it anyway)
My bad, I'll remember to do this next time:
Since it's so small, here it is for reference:
==========
From c651a5d37afed8461adc3f2824cae1d7facd2e7a Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Mon, 17 Apr 2017 18:25:07 -0700
Subject: [PATCH 1/2] sparc: Split BPF JIT into 32-bit and 64-bit.
This is in preparation for adding the 64-bit eBPF JIT.
Signed-off-by: David S. Miller <davem@davemloft.net>
---
arch/sparc/net/Makefile | 2 +-
arch/sparc/net/{bpf_jit.h => bpf_jit_32.h} | 0
arch/sparc/net/{bpf_jit_asm.S => bpf_jit_asm_32.S} | 2 +-
arch/sparc/net/bpf_jit_asm_64.S | 1 +
arch/sparc/net/{bpf_jit_comp.c => bpf_jit_comp_32.c} | 2 +-
arch/sparc/net/bpf_jit_comp_64.c | 1 +
6 files changed, 5 insertions(+), 3 deletions(-)
rename arch/sparc/net/{bpf_jit.h => bpf_jit_32.h} (100%)
rename arch/sparc/net/{bpf_jit_asm.S => bpf_jit_asm_32.S} (99%)
create mode 100644 arch/sparc/net/bpf_jit_asm_64.S
rename arch/sparc/net/{bpf_jit_comp.c => bpf_jit_comp_32.c} (99%)
create mode 100644 arch/sparc/net/bpf_jit_comp_64.c
diff --git a/arch/sparc/net/Makefile b/arch/sparc/net/Makefile
index 1306a58..76fa8e9 100644
--- a/arch/sparc/net/Makefile
+++ b/arch/sparc/net/Makefile
@@ -1,4 +1,4 @@
#
# Arch-specific network modules
#
-obj-$(CONFIG_BPF_JIT) += bpf_jit_asm.o bpf_jit_comp.o
+obj-$(CONFIG_BPF_JIT) += bpf_jit_asm_$(BITS).o bpf_jit_comp_$(BITS).o
diff --git a/arch/sparc/net/bpf_jit.h b/arch/sparc/net/bpf_jit_32.h
similarity index 100%
rename from arch/sparc/net/bpf_jit.h
rename to arch/sparc/net/bpf_jit_32.h
diff --git a/arch/sparc/net/bpf_jit_asm.S b/arch/sparc/net/bpf_jit_asm_32.S
similarity index 99%
rename from arch/sparc/net/bpf_jit_asm.S
rename to arch/sparc/net/bpf_jit_asm_32.S
index 8c83f4b..5632cdc 100644
--- a/arch/sparc/net/bpf_jit_asm.S
+++ b/arch/sparc/net/bpf_jit_asm_32.S
@@ -1,6 +1,6 @@
#include <asm/ptrace.h>
-#include "bpf_jit.h"
+#include "bpf_jit_32.h"
#ifdef CONFIG_SPARC64
#define SAVE_SZ 176
diff --git a/arch/sparc/net/bpf_jit_asm_64.S b/arch/sparc/net/bpf_jit_asm_64.S
new file mode 100644
index 0000000..6fb023f
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_asm_64.S
@@ -0,0 +1 @@
+#include "bpf_jit_asm_32.S"
diff --git a/arch/sparc/net/bpf_jit_comp.c b/arch/sparc/net/bpf_jit_comp_32.c
similarity index 99%
rename from arch/sparc/net/bpf_jit_comp.c
rename to arch/sparc/net/bpf_jit_comp_32.c
index a6d9204..83fc41d 100644
--- a/arch/sparc/net/bpf_jit_comp.c
+++ b/arch/sparc/net/bpf_jit_comp_32.c
@@ -8,7 +8,7 @@
#include <asm/cacheflush.h>
#include <asm/ptrace.h>
-#include "bpf_jit.h"
+#include "bpf_jit_32.h"
int bpf_jit_enable __read_mostly;
diff --git a/arch/sparc/net/bpf_jit_comp_64.c b/arch/sparc/net/bpf_jit_comp_64.c
new file mode 100644
index 0000000..49b5f65
--- /dev/null
+++ b/arch/sparc/net/bpf_jit_comp_64.c
@@ -0,0 +1 @@
+#include "bpf_jit_comp_32.c"
--
2.1.2.532.g19b5d50
^ permalink raw reply related [flat|nested] 6+ messages in thread
end of thread, other threads:[~2017-04-18 19:35 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-04-18 18:58 [PATCH net-next 1/2] sparc: Split BPF JIT into 32-bit and 64-bit David Miller
2017-04-18 18:58 ` David Miller
2017-04-18 19:31 ` Sam Ravnborg
2017-04-18 19:31 ` Sam Ravnborg
2017-04-18 19:35 ` David Miller
2017-04-18 19:35 ` David Miller
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.