* [PATCH 6/7] LoongArch: vmlinux.lds.S: Remove `.fixup` section
@ 2022-10-10 9:34 Youling Tang
0 siblings, 0 replies; only message in thread
From: Youling Tang @ 2022-10-10 9:34 UTC (permalink / raw)
To: Huacai Chen, Masahiro Yamada, Michal Marek
Cc: WANG Xuerui, Nick Desaulniers, Daniel Borkmann,
Alexei Starovoitov, loongarch, linux-kernel, linux-kbuild, bpf
After using the `.L_xxx` lable instead of `.fixup`, we no longer place
anything into a `.fixup` section, so we no longer need to place those
sections into the `.text` section in the main kernel Image.
Remove the use of `.fixup`.
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
---
Using `irp` allows you to easily define multiple lables, provide
convenience for implementing __{copy, clear}_user_fast in the future.
arch/loongarch/kernel/vmlinux.lds.S | 1 -
arch/loongarch/lib/clear_user.S | 14 +++++---------
arch/loongarch/lib/copy_user.S | 16 ++++++----------
3 files changed, 11 insertions(+), 20 deletions(-)
diff --git a/arch/loongarch/kernel/vmlinux.lds.S b/arch/loongarch/kernel/vmlinux.lds.S
index efecda0c2361..d382c88f47b2 100644
--- a/arch/loongarch/kernel/vmlinux.lds.S
+++ b/arch/loongarch/kernel/vmlinux.lds.S
@@ -48,7 +48,6 @@ SECTIONS
KPROBES_TEXT
IRQENTRY_TEXT
SOFTIRQENTRY_TEXT
- *(.fixup)
*(.gnu.warning)
} :text = 0
. = ALIGN(PECOFF_SEGMENT_ALIGN);
diff --git a/arch/loongarch/lib/clear_user.S b/arch/loongarch/lib/clear_user.S
index 7a066d6a41b8..167823b21def 100644
--- a/arch/loongarch/lib/clear_user.S
+++ b/arch/loongarch/lib/clear_user.S
@@ -9,15 +9,11 @@
#include <asm/export.h>
#include <asm/regdef.h>
-.macro fixup_ex from, to, offset, fix
-.if \fix
- .section .fixup, "ax"
-\to: addi.d a0, a1, \offset
+.irp to, 0
+.L_fixup_handle_\to\():
+ addi.d a0, a1, (\to) * (-8)
jr ra
- .previous
-.endif
- _asm_extable \from\()b, \to\()b
-.endm
+.endr
/*
* unsigned long __clear_user(void *addr, size_t size)
@@ -36,7 +32,7 @@ SYM_FUNC_START(__clear_user)
2: move a0, a1
jr ra
- fixup_ex 1, 3, 0, 1
+ _asm_extable 1, .L_fixup_handle_0
SYM_FUNC_END(__clear_user)
EXPORT_SYMBOL(__clear_user)
diff --git a/arch/loongarch/lib/copy_user.S b/arch/loongarch/lib/copy_user.S
index f8ace04586c2..5d7bfa8d53d2 100644
--- a/arch/loongarch/lib/copy_user.S
+++ b/arch/loongarch/lib/copy_user.S
@@ -9,15 +9,11 @@
#include <asm/export.h>
#include <asm/regdef.h>
-.macro fixup_ex from, to, offset, fix
-.if \fix
- .section .fixup, "ax"
-\to: addi.d a0, a2, \offset
+.irp to, 0
+.L_fixup_handle_\to\():
+ addi.d a0, a2, (\to) * (-8)
jr ra
- .previous
-.endif
- _asm_extable \from\()b, \to\()b
-.endm
+.endr
/*
* unsigned long __copy_user(void *to, const void *from, size_t n)
@@ -39,8 +35,8 @@ SYM_FUNC_START(__copy_user)
3: move a0, a2
jr ra
- fixup_ex 1, 4, 0, 1
- fixup_ex 2, 4, 0, 0
+ _asm_extable 1, .L_fixup_handle_0
+ _asm_extable 2, .L_fixup_handle_0
SYM_FUNC_END(__copy_user)
EXPORT_SYMBOL(__copy_user)
--
2.36.1
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