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simplify

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don't need esp
This commit is contained in:
Glenn Maynard
2004-03-19 21:28:59 +00:00
parent 60e2a38dc7
commit 4e5d430926
3 changed files with 4 additions and 8 deletions
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stepmania/src/archutils/Unix/Backtrace.cpp
+3 -6
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@@ -160,8 +160,7 @@ void InitializeBacktrace()
/* We might have a different stack in the signal handler. Record a pointer
* that lies in the real stack, so we can look it up later. */
register void *esp __asm__ ("esp");
SavedStackPointer = esp;
SavedStackPointer = __builtin_frame_address(0);
}
/* backtrace() for x86 Linux, tested with kernel 2.4.18, glibc 2.3.1. */
@@ -172,7 +171,7 @@ static void do_backtrace( const void **buf, size_t size, const BacktraceContext
get_readable_ranges( readable_begin, readable_end, 1024 );
/* Find the stack memory blocks. */
const int stack_block1 = find_address( (void *) ctx->esp, readable_begin, readable_end );
const int stack_block1 = find_address( (void *) ctx->ebp, readable_begin, readable_end );
const int stack_block2 = find_address( SavedStackPointer, readable_begin, readable_end );
/* This matches the layout of the stack. The frame pointer makes the
@@ -214,7 +213,6 @@ static void do_backtrace( const void **buf, size_t size, const BacktraceContext
void GetSignalBacktraceContext( BacktraceContext *ctx, const ucontext_t *uc )
{
ctx->esp = (long) uc->uc_mcontext.gregs[REG_ESP];
ctx->eip = (long) uc->uc_mcontext.gregs[REG_EIP];
ctx->ebp = (long) uc->uc_mcontext.gregs[REG_EBP];
ctx->pid = GetCurrentThreadId();
@@ -229,10 +227,9 @@ void GetBacktrace( const void **buf, size_t size, const BacktraceContext *ctx )
{
ctx = &CurrentCtx;
register void *esp __asm__ ("esp");
CurrentCtx.esp = (long) esp;
CurrentCtx.eip = 0;
CurrentCtx.ebp = (long) __builtin_frame_address(0);
CurrentCtx.pid = GetCurrentThreadId();
}