Alexandre Julliard : preloader: Add a fallback to the old mmap syscall just in case.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 9f06a197c8c156acf21d8d809ce80cdcde9b6f68
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=9f06a197c8c156acf21d8d809c...

Author: Alexandre Julliard 
Date:   Tue May  2 20:06:25 2017 +0200

preloader: Add a fallback to the old mmap syscall just in case.

Signed-off-by: Alexandre Julliard

---

loader/preloader.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/loader/preloader.c b/loader/preloader.c
index a21efc9..5e6add7 100644
--- a/loader/preloader.c
+++ b/loader/preloader.c
@@ -311,9 +311,16 @@ __ASM_GLOBAL_FUNC(wld_mmap,
                   "\tshrl $12,%ebp\n"
                   "\tint $0x80\n"
                   "\tcmpl $-4096,%eax\n"
-                  "\tjbe 1f\n"
-                  "\tmovl $-1,%eax\n"
-                  "1:\tpopl %edi\n"
+                  "\tjbe 2f\n"
+                  "\tcmpl $-38,%eax\n"      /* ENOSYS */
+                  "\tjne 1f\n"
+                  "\tmovl $90,%eax\n"       /* SYS_mmap */
+                  "\tleal 20(%esp),%ebx\n"
+                  "\tint $0x80\n"
+                  "\tcmpl $-4096,%eax\n"
+                  "\tjbe 2f\n"
+                  "1:\tmovl $-1,%eax\n"
+                  "2:\tpopl %edi\n"
                   __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
                   "\tpopl %esi\n"
                   __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")