msvcrt: Add call frame annotations in x86 assembly code.

dlls/msvcrt/cppexcept.c

@@ -413,14 +413,22 @@ extern DWORD CDECL __CxxFrameHandler( PEXCEPTION_RECORD rec, EXCEPTION_REGISTRAT
                                       PCONTEXT context, EXCEPTION_REGISTRATION_RECORD** dispatch );
 __ASM_GLOBAL_FUNC( __CxxFrameHandler,
                    "pushl $0\n\t"        /* nested_trylevel */
+                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
                    "pushl $0\n\t"        /* nested_frame */
+                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
                    "pushl %eax\n\t"      /* descr */
+                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
                    "pushl 28(%esp)\n\t"  /* dispatch */
+                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
                    "pushl 28(%esp)\n\t"  /* context */
+                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
                    "pushl 28(%esp)\n\t"  /* frame */
+                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
                    "pushl 28(%esp)\n\t"  /* rec */
+                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
                    "call " __ASM_NAME("cxx_frame_handler") "\n\t"
                    "add $28,%esp\n\t"
+                   __ASM_CFI(".cfi_adjust_cfa_offset -28\n\t")
                    "ret" )
 
 

dlls/msvcrt/except.c

@@ -117,14 +117,19 @@ static DWORD MSVCRT_nested_handler(PEXCEPTION_RECORD rec,
 
 /* Provided for VC++ binary compatibility only */
 __ASM_GLOBAL_FUNC(_EH_prolog,
+                  __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")  /* skip ret addr */
                   "pushl $-1\n\t"
+                  __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
                   "pushl %eax\n\t"
+                  __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
                   "pushl %fs:0\n\t"
+                  __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
                   "movl  %esp, %fs:0\n\t"
                   "movl  12(%esp), %eax\n\t"
                   "movl  %ebp, 12(%esp)\n\t"
                   "leal  12(%esp), %ebp\n\t"
                   "pushl %eax\n\t"
+                  __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
                   "ret")
 
 static void msvcrt_local_unwind2(MSVCRT_EXCEPTION_FRAME* frame, int trylevel, void *ebp)

dlls/msvcrt/misc.c

@@ -138,7 +138,10 @@ __ASM_GLOBAL_FUNC(_chkesp,
                   "jnz 1f\n\t"
                   "ret\n"
                   "1:\tpushl %ebp\n\t"
+                  __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
+                  __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
                   "movl %esp,%ebp\n\t"
+                  __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
                   "subl $12,%esp\n\t"
                   "pushl %eax\n\t"
                   "pushl %ecx\n\t"
@@ -148,6 +151,8 @@ __ASM_GLOBAL_FUNC(_chkesp,
                   "popl %ecx\n\t"
                   "popl %eax\n\t"
                   "leave\n\t"
+                  __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
+                  __ASM_CFI(".cfi_same_value %ebp\n\t")
                   "ret")
 
 void CDECL MSVCRT_chkesp_fail(void)