Keno Fischer : preloader: Add proper CFI instructions to _start functions.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 5f38bfed7cf408c1734d6bff8770c3b11edc665f
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=5f38bfed7cf408c1734d6bff87...

Author: Keno Fischer <keno(a)juliacomputing.com>
Date:   Thu Aug 11 15:04:39 2016 -0400

preloader: Add proper CFI instructions to _start functions.

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

---

 loader/preloader.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/loader/preloader.c b/loader/preloader.c
index db0e998..7cf2946 100644
--- 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 */