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kernel/x86: Make arch_debug_get_stack_trace handle user-only stack traces.

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Begin by getting the user iframe, and remove the logic that was
preventing any return addresses from being reported if STACK_TRACE_KERNEL
was unset.
This commit is contained in:
Augustin Cavalier
2024-07-16 20:22:09 -04:00
parent e763eb55ee
commit 6d5c99effe
1 changed files with 12 additions and 4 deletions
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src/system/kernel/arch/x86/arch_debug.cpp
+12 -4
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@@ -1142,6 +1142,15 @@ arch_debug_get_stack_trace(addr_t* returnAddresses, int32 maxCount,
addr_t bp = x86_get_stack_frame();
bool onKernelStack = true;
if ((flags & (STACK_TRACE_KERNEL | STACK_TRACE_USER)) == STACK_TRACE_USER) {
iframe* frame = x86_get_user_iframe();
if (frame == NULL)
return 0;
bp = frame->bp;
onKernelStack = false;
}
while (bp != 0 && count < maxCount) {
onKernelStack = onKernelStack
&& is_kernel_stack_address(thread, bp);
@@ -1170,11 +1179,10 @@ arch_debug_get_stack_trace(addr_t* returnAddresses, int32 maxCount,
if (ip == 0)
break;
if (skipFrames <= 0
&& ((flags & STACK_TRACE_KERNEL) != 0 || onKernelStack)) {
returnAddresses[count++] = ip;
} else
if (skipFrames > 0)
skipFrames--;
else
returnAddresses[count++] = ip;
bp = nextBp;
}