preloader: Add proper CFI instructions to _start functions.

Signed-off-by: Keno Fischer <keno@juliacomputing.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

preloader: Add proper CFI instructions to _start functions.
5f38bfed · Keno Fischer · Alexandre Julliard · be90480c · 5f38bfed
Commit 5f38bfed authored Aug 11, 2016 by Keno Fischer Committed by Alexandre Julliard Aug 16, 2016
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preloader.c loader/preloader.c +2 -0

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--- a/loader/preloader.c
+++ b/loader/preloader.c
@@ -212,6 +212,7 @@ struct
 void _start(void);
 extern char _end[];
 __ASM_GLOBAL_FUNC(_start,
+                  __ASM_CFI("\t.cfi_undefined %eip\n")
                  "\tmovl $243,%eax\n"        /* SYS_set_thread_area */
                  "\tmovl $thread_ldt,%ebx\n"
                  "\tint $0x80\n"             /* allocate gs segment */
@@ -363,6 +364,7 @@ void *thread_data[256];
 void _start(void);
 extern char _end[];
 __ASM_GLOBAL_FUNC(_start,
+                  __ASM_CFI(".cfi_undefined %rip\n\t")
                  "movq %rsp,%rax\n\t"
                  "leaq -144(%rsp),%rsp\n\t" /* allocate some space for extra aux values */
                  "movq %rax,(%rsp)\n\t"     /* orig stack pointer */