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authorJean Pihet <jean.pihet@linaro.org>2014-02-03 19:18:29 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2014-03-13 11:22:38 +0000
commit5f888a1d33c48900012e6b4c18296ce7c715dc6c (patch)
tree5780cbb3eb57dd931c571c5e92f8f31b26559c58 /arch/arm64/include/asm/ptrace.h
parent23c7d70d55c6d963f225744cd1b996dee68c88d1 (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/asm/ptrace.h')
-rw-r--r--arch/arm64/include/asm/ptrace.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h
index 35ff2f9de072..c7ba261dd4b3 100644
--- a/arch/arm64/include/asm/ptrace.h
+++ b/arch/arm64/include/asm/ptrace.h
@@ -133,7 +133,7 @@ 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