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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-14 10:13:37 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-14 10:13:37 -0700 |
commit | 6873139ed078bfe0341d4cbb69e5af1b323bf532 (patch) | |
tree | 234f7acaf1b8db767868dff4ad4b6af73b247ee7 /tools/objtool/arch/x86/decode.c | |
parent | d5660df4a555a98154da850fb61f118269d0a283 (diff) | |
parent | ab0a40ea88204e1291b56da8128e2845fec8ee88 (diff) |
Merge tag 'objtool-core-2020-10-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool updates from Ingo Molnar:
"Most of the changes are cleanups and reorganization to make the
objtool code more arch-agnostic. This is in preparation for non-x86
support.
Other changes:
- KASAN fixes
- Handle unreachable trap after call to noreturn functions better
- Ignore unreachable fake jumps
- Misc smaller fixes & cleanups"
* tag 'objtool-core-2020-10-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
perf build: Allow nested externs to enable BUILD_BUG() usage
objtool: Allow nested externs to enable BUILD_BUG()
objtool: Permit __kasan_check_{read,write} under UACCESS
objtool: Ignore unreachable trap after call to noreturn functions
objtool: Handle calling non-function symbols in other sections
objtool: Ignore unreachable fake jumps
objtool: Remove useless tests before save_reg()
objtool: Decode unwind hint register depending on architecture
objtool: Make unwind hint definitions available to other architectures
objtool: Only include valid definitions depending on source file type
objtool: Rename frame.h -> objtool.h
objtool: Refactor jump table code to support other architectures
objtool: Make relocation in alternative handling arch dependent
objtool: Abstract alternative special case handling
objtool: Move macros describing structures to arch-dependent code
objtool: Make sync-check consider the target architecture
objtool: Group headers to check in a single list
objtool: Define 'struct orc_entry' only when needed
objtool: Skip ORC entry creation for non-text sections
objtool: Move ORC logic out of check()
...
Diffstat (limited to 'tools/objtool/arch/x86/decode.c')
-rw-r--r-- | tools/objtool/arch/x86/decode.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c index 1967370440b3..cde9c36e40ae 100644 --- a/tools/objtool/arch/x86/decode.c +++ b/tools/objtool/arch/x86/decode.c @@ -15,6 +15,7 @@ #include "../../elf.h" #include "../../arch.h" #include "../../warn.h" +#include <asm/orc_types.h> static unsigned char op_to_cfi_reg[][2] = { {CFI_AX, CFI_R8}, @@ -583,3 +584,39 @@ const char *arch_nop_insn(int len) return nops[len-1]; } + +int arch_decode_hint_reg(struct instruction *insn, u8 sp_reg) +{ + struct cfi_reg *cfa = &insn->cfi.cfa; + + switch (sp_reg) { + case ORC_REG_UNDEFINED: + cfa->base = CFI_UNDEFINED; + break; + case ORC_REG_SP: + cfa->base = CFI_SP; + break; + case ORC_REG_BP: + cfa->base = CFI_BP; + break; + case ORC_REG_SP_INDIRECT: + cfa->base = CFI_SP_INDIRECT; + break; + case ORC_REG_R10: + cfa->base = CFI_R10; + break; + case ORC_REG_R13: + cfa->base = CFI_R13; + break; + case ORC_REG_DI: + cfa->base = CFI_DI; + break; + case ORC_REG_DX: + cfa->base = CFI_DX; + break; + default: + return -1; + } + + return 0; +} |