gallium/util: add 1d/2d mipmap generation support

[mesa.git] / src / gallium / auxiliary / util / u_debug_stack.c

diff --git a/src/gallium/auxiliary/util/u_debug_stack.c b/src/gallium/auxiliary/util/u_debug_stack.c
index e9891fde8a383b4c9e77c78bf2c3c1356337136f..24e039fd226aa2d5f3e6f5331808a9dc2a6f2a18 100644 (file)
--- a/src/gallium/auxiliary/util/u_debug_stack.c
+++ b/src/gallium/auxiliary/util/u_debug_stack.c
@@ -48,7 +48,10 @@ debug_backtrace_capture(struct debug_stack_frame *backtrace,
    if(!nr_frames)
       return;
 
-#if defined(PIPE_CC_GCC)
+#if defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86)
+   __asm__ __volatile__("mov (%%ebp),%0": "=r" (frame_pointer));
+   frame_pointer = (const void **)frame_pointer[0];
+#elif defined(PIPE_CC_GCC)
    frame_pointer = ((const void **)__builtin_frame_address(1));
 #elif defined(PIPE_CC_MSVC) && defined(PIPE_ARCH_X86)
    __asm {
@@ -62,6 +65,8 @@ debug_backtrace_capture(struct debug_stack_frame *backtrace,
    
 #ifdef PIPE_ARCH_X86
    while(nr_frames) {
+      const void **next_frame_pointer;
+
       if(!frame_pointer)
          break;
       
@@ -72,7 +77,14 @@ debug_backtrace_capture(struct debug_stack_frame *backtrace,
          --nr_frames;
       }
       
-      frame_pointer = (const void **)frame_pointer[0];
+      next_frame_pointer = (const void **)frame_pointer[0];
+      
+      /* Limit the stack walk to avoid referencing undefined memory */
+      if((uintptr_t)next_frame_pointer <= (uintptr_t)frame_pointer ||
+         (uintptr_t)next_frame_pointer > (uintptr_t)frame_pointer + 64*1024)
+         break;
+      
+      frame_pointer = next_frame_pointer;
    }
 #endif