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Kernel: Start perf event stack capture at RBP, not EBP on x86_64

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This commit is contained in:
Andreas Kling 2021-12-18 11:13:55 +01:00
parent 3214e35535
commit 5c344f4aee
1 changed files with 8 additions and 3 deletions
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11
Kernel/PerformanceEventBuffer.cpp
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@ -23,10 +23,15 @@ PerformanceEventBuffer::PerformanceEventBuffer(NonnullOwnPtr<KBuffer> buffer)
NEVER_INLINE ErrorOr<void> PerformanceEventBuffer::append(int type, FlatPtr arg1, FlatPtr arg2, StringView arg3, Thread* current_thread) NEVER_INLINE ErrorOr<void> PerformanceEventBuffer::append(int type, FlatPtr arg1, FlatPtr arg2, StringView arg3, Thread* current_thread)
{ {
FlatPtr ebp; FlatPtr base_pointer;
#if ARCH(I386)
asm volatile("movl %%ebp, %%eax" asm volatile("movl %%ebp, %%eax"
: "=a"(ebp)); : "=a"(base_pointer));
return append_with_ip_and_bp(current_thread->pid(), current_thread->tid(), 0, ebp, type, 0, arg1, arg2, arg3); #else
asm volatile("movq %%rbp, %%rax"
: "=a"(base_pointer));
#endif
return append_with_ip_and_bp(current_thread->pid(), current_thread->tid(), 0, base_pointer, type, 0, arg1, arg2, arg3);
} }
static Vector<FlatPtr, PerformanceEvent::max_stack_frame_count> raw_backtrace(FlatPtr bp, FlatPtr ip) static Vector<FlatPtr, PerformanceEvent::max_stack_frame_count> raw_backtrace(FlatPtr bp, FlatPtr ip)