From: Sathvika Vasireddy <sv@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: jpoimboe@redhat.com, peterz@infradead.org,
linux-kernel@vger.kernel.org, aik@ozlabs.ru, mpe@ellerman.id.au,
mingo@redhat.com, christophe.leroy@csgroup.eu,
rostedt@goodmis.org, mbenes@suse.cz, npiggin@gmail.com,
chenzhongjin@huawei.com, naveen.n.rao@linux.vnet.ibm.com,
sv@linux.ibm.com
Subject: [PATCH v4 15/16] objtool/powerpc: Enable objtool to be built on ppc
Date: Sun, 2 Oct 2022 16:12:39 +0530 [thread overview]
Message-ID: <20221002104240.1316480-16-sv@linux.ibm.com> (raw)
In-Reply-To: <20221002104240.1316480-1-sv@linux.ibm.com>
This patch adds [stub] implementations for required functions, inorder
to enable objtool build on powerpc.
Signed-off-by: Sathvika Vasireddy <sv@linux.ibm.com>
[Christophe Leroy: powerpc: Add missing asm/asm.h for objtool,
Use local variables for type and imm in arch_decode_instruction(),
Adapt len for prefixed instructions.]
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/asm.h | 7 ++
tools/objtool/arch/powerpc/Build | 2 +
tools/objtool/arch/powerpc/decode.c | 85 +++++++++++++++++++
.../arch/powerpc/include/arch/cfi_regs.h | 11 +++
tools/objtool/arch/powerpc/include/arch/elf.h | 8 ++
.../arch/powerpc/include/arch/special.h | 21 +++++
tools/objtool/arch/powerpc/special.c | 19 +++++
8 files changed, 154 insertions(+)
create mode 100644 arch/powerpc/include/asm/asm.h
create mode 100644 tools/objtool/arch/powerpc/Build
create mode 100644 tools/objtool/arch/powerpc/decode.c
create mode 100644 tools/objtool/arch/powerpc/include/arch/cfi_regs.h
create mode 100644 tools/objtool/arch/powerpc/include/arch/elf.h
create mode 100644 tools/objtool/arch/powerpc/include/arch/special.h
create mode 100644 tools/objtool/arch/powerpc/special.c
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 4c466acdc70d..dc05cd23c233 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -237,6 +237,7 @@ config PPC
select HAVE_MOD_ARCH_SPECIFIC
select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
select HAVE_OPTPROBES
+ select HAVE_OBJTOOL if PPC32 || MPROFILE_KERNEL
select HAVE_PERF_EVENTS
select HAVE_PERF_EVENTS_NMI if PPC64
select HAVE_PERF_REGS
diff --git a/arch/powerpc/include/asm/asm.h b/arch/powerpc/include/asm/asm.h
new file mode 100644
index 000000000000..86f46b604e9a
--- /dev/null
+++ b/arch/powerpc/include/asm/asm.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_ASM_H
+#define _ASM_POWERPC_ASM_H
+
+#define _ASM_PTR " .long "
+
+#endif /* _ASM_POWERPC_ASM_H */
diff --git a/tools/objtool/arch/powerpc/Build b/tools/objtool/arch/powerpc/Build
new file mode 100644
index 000000000000..d24d5636a5b8
--- /dev/null
+++ b/tools/objtool/arch/powerpc/Build
@@ -0,0 +1,2 @@
+objtool-y += decode.o
+objtool-y += special.o
diff --git a/tools/objtool/arch/powerpc/decode.c b/tools/objtool/arch/powerpc/decode.c
new file mode 100644
index 000000000000..dcd0975cad6b
--- /dev/null
+++ b/tools/objtool/arch/powerpc/decode.c
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <objtool/check.h>
+#include <objtool/elf.h>
+#include <objtool/arch.h>
+#include <objtool/warn.h>
+#include <objtool/builtin.h>
+#include <objtool/endianness.h>
+
+unsigned long arch_dest_reloc_offset(int addend)
+{
+ return addend;
+}
+
+bool arch_callee_saved_reg(unsigned char reg)
+{
+ return false;
+}
+
+int arch_decode_hint_reg(u8 sp_reg, int *base)
+{
+ exit(-1);
+}
+
+const char *arch_nop_insn(int len)
+{
+ exit(-1);
+}
+
+const char *arch_ret_insn(int len)
+{
+ exit(-1);
+}
+
+int arch_decode_instruction(struct objtool_file *file, const struct section *sec,
+ unsigned long offset, unsigned int maxlen,
+ unsigned int *len, enum insn_type *type,
+ unsigned long *immediate,
+ struct list_head *ops_list)
+{
+ unsigned int opcode;
+ enum insn_type typ;
+ unsigned long imm;
+ u32 insn;
+
+ insn = bswap_if_needed(file->elf, *(u32 *)(sec->data->d_buf + offset));
+ opcode = insn >> 26;
+ typ = INSN_OTHER;
+ imm = 0;
+
+ if (opcode == 1)
+ *len = 8;
+ else
+ *len = 4;
+
+ *type = typ;
+ *immediate = imm;
+
+ return 0;
+}
+
+unsigned long arch_jump_destination(struct instruction *insn)
+{
+ return insn->offset + insn->immediate;
+}
+
+void arch_initial_func_cfi_state(struct cfi_init_state *state)
+{
+ int i;
+
+ for (i = 0; i < CFI_NUM_REGS; i++) {
+ state->regs[i].base = CFI_UNDEFINED;
+ state->regs[i].offset = 0;
+ }
+
+ /* initial CFA (call frame address) */
+ state->cfa.base = CFI_SP;
+ state->cfa.offset = 0;
+
+ /* initial LR (return address) */
+ state->regs[CFI_RA].base = CFI_CFA;
+ state->regs[CFI_RA].offset = 0;
+}
diff --git a/tools/objtool/arch/powerpc/include/arch/cfi_regs.h b/tools/objtool/arch/powerpc/include/arch/cfi_regs.h
new file mode 100644
index 000000000000..59638ebeafc8
--- /dev/null
+++ b/tools/objtool/arch/powerpc/include/arch/cfi_regs.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef _OBJTOOL_CFI_REGS_H
+#define _OBJTOOL_CFI_REGS_H
+
+#define CFI_BP 1
+#define CFI_SP CFI_BP
+#define CFI_RA 32
+#define CFI_NUM_REGS 33
+
+#endif
diff --git a/tools/objtool/arch/powerpc/include/arch/elf.h b/tools/objtool/arch/powerpc/include/arch/elf.h
new file mode 100644
index 000000000000..3c8ebb7d2a6b
--- /dev/null
+++ b/tools/objtool/arch/powerpc/include/arch/elf.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef _OBJTOOL_ARCH_ELF
+#define _OBJTOOL_ARCH_ELF
+
+#define R_NONE R_PPC_NONE
+
+#endif /* _OBJTOOL_ARCH_ELF */
diff --git a/tools/objtool/arch/powerpc/include/arch/special.h b/tools/objtool/arch/powerpc/include/arch/special.h
new file mode 100644
index 000000000000..ffef9ada7133
--- /dev/null
+++ b/tools/objtool/arch/powerpc/include/arch/special.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef _PPC_ARCH_SPECIAL_H
+#define _PPC_ARCH_SPECIAL_H
+
+#define EX_ENTRY_SIZE 8
+#define EX_ORIG_OFFSET 0
+#define EX_NEW_OFFSET 4
+
+#define JUMP_ENTRY_SIZE 16
+#define JUMP_ORIG_OFFSET 0
+#define JUMP_NEW_OFFSET 4
+#define JUMP_KEY_OFFSET 8
+
+#define ALT_ENTRY_SIZE 12
+#define ALT_ORIG_OFFSET 0
+#define ALT_NEW_OFFSET 4
+#define ALT_FEATURE_OFFSET 8
+#define ALT_ORIG_LEN_OFFSET 10
+#define ALT_NEW_LEN_OFFSET 11
+
+#endif /* _PPC_ARCH_SPECIAL_H */
diff --git a/tools/objtool/arch/powerpc/special.c b/tools/objtool/arch/powerpc/special.c
new file mode 100644
index 000000000000..d33868147196
--- /dev/null
+++ b/tools/objtool/arch/powerpc/special.c
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include <string.h>
+#include <stdlib.h>
+#include <objtool/special.h>
+#include <objtool/builtin.h>
+
+
+bool arch_support_alt_relocation(struct special_alt *special_alt,
+ struct instruction *insn,
+ struct reloc *reloc)
+{
+ exit(-1);
+}
+
+struct reloc *arch_find_switch_table(struct objtool_file *file,
+ struct instruction *insn)
+{
+ exit(-1);
+}
--
2.31.1
next prev parent reply other threads:[~2022-10-02 10:46 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-02 10:42 [PATCH v4 00/16] objtool: Enable and implement --mcount option on powerpc Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 01/16] powerpc: Fix __WARN_FLAGS() for use with Objtool Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 02/16] powerpc: Override __ALIGN and __ALIGN_STR macros Sathvika Vasireddy
2022-10-02 17:41 ` Christophe Leroy
2022-10-02 10:42 ` [PATCH v4 03/16] powerpc: Fix objtool unannotated intra-function call warnings Sathvika Vasireddy
2022-10-10 11:34 ` Naveen N. Rao
2022-10-02 10:42 ` [PATCH v4 04/16] powerpc: Curb objtool unannotated intra-function warnings Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 05/16] powerpc: Skip objtool from running on drivers/crypto/vmx/aesp8-ppc.o Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 06/16] powerpc: Fix objtool unannotated intra-function call warnings on PPC32 Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 07/16] powerpc: Skip objtool from running on VDSO files Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 08/16] objtool: Fix SEGFAULT Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 09/16] objtool: Use target file endianness instead of a compiled constant Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 10/16] objtool: Use target file class size " Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 11/16] objtool: Add --mnop as an option to --mcount Sathvika Vasireddy
2022-10-02 17:40 ` Christophe Leroy
2022-10-10 11:37 ` Naveen N. Rao
2022-10-11 20:33 ` Josh Poimboeuf
2022-10-12 13:47 ` Naveen N. Rao
2022-10-02 10:42 ` [PATCH v4 12/16] objtool: Read special sections with alts only when specific options are selected Sathvika Vasireddy
2022-10-02 17:42 ` Christophe Leroy
2022-10-02 10:42 ` [PATCH v4 13/16] objtool: Use macros to define arch specific reloc types Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 14/16] objtool: Add arch specific function arch_ftrace_match() Sathvika Vasireddy
2022-10-02 10:42 ` Sathvika Vasireddy [this message]
2022-10-02 10:42 ` [PATCH v4 16/16] objtool/powerpc: Add --mcount specific implementation Sathvika Vasireddy
2022-10-02 17:42 ` Christophe Leroy
2022-10-10 11:49 ` [PATCH v4 00/16] objtool: Enable and implement --mcount option on powerpc Naveen N. Rao
[not found] ` <notmuch-sha1-66fb111b87471c685a53b80a0502d959f90d07a7>
2022-10-13 0:05 ` Josh Poimboeuf
2022-10-13 3:40 ` Naveen N. Rao
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