diff options
| author | Jean Pihet <jean.pihet@linaro.org> | 2014-02-03 19:18:29 +0100 |
|---|---|---|
| committer | Greg Hackmann <ghackmann@google.com> | 2014-08-29 16:49:09 -0700 |
| commit | 02273a4cd3ebada77f088ae13229813ca918af44 (patch) | |
| tree | 0d7f73aef6fc1a57f341db009adbdcd1fcc4cd17 /arch/arm64/include | |
| parent | bf485e6f51d505bbe4ab5eaafcfe7789ec83e7ee (diff) | |
ARM64: perf: support dwarf unwinding in compat mode
Add support for unwinding using the dwarf information in compat
mode. Using the correct user stack pointer allows perf to record
the frames correctly in the native and compat modes.
Note that although the dwarf frame unwinding works ok using
libunwind in native mode (on ARMv7 & ARMv8), some changes are
required to the libunwind code for the compat mode. Those changes
are posted separately on the libunwind mailing list.
Tested on ARMv8 platform with v8 and compat v7 binaries, the latter
are statically built.
Signed-off-by: Jean Pihet <jean.pihet@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/compat.h | 2 | ||||
| -rw-r--r-- | arch/arm64/include/asm/ptrace.h | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h index 899af807ef0f..7058eec269ab 100644 --- a/arch/arm64/include/asm/compat.h +++ b/arch/arm64/include/asm/compat.h @@ -214,7 +214,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr) return (u32)(unsigned long)uptr; } -#define compat_user_stack_pointer() (current_pt_regs()->compat_sp) +#define compat_user_stack_pointer() (user_stack_pointer(current_pt_regs())) static inline void __user *arch_compat_alloc_user_space(long len) { diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h index 41a71ee4c3df..c2a199727e4f 100644 --- a/arch/arm64/include/asm/ptrace.h +++ b/arch/arm64/include/asm/ptrace.h @@ -131,7 +131,7 @@ struct pt_regs { (!((regs)->pstate & PSR_F_BIT)) #define user_stack_pointer(regs) \ - ((regs)->sp) + (!compat_user_mode(regs)) ? ((regs)->sp) : ((regs)->compat_sp) /* * Are the current registers suitable for user mode? (used to maintain |