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

Signed-off-by: Alexandre Julliard <julliard@winehq.org>

preloader: Add a fallback to the old mmap syscall just in case.
9f06a197 · Alexandre Julliard · ee3f0602 · 9f06a197
Commit 9f06a197 authored May 02, 2017 by Alexandre Julliard
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Showing with 10 additions and 3 deletions

preloader.c loader/preloader.c +10 -3

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--- 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")