[compiler-rt] r266295 - [sanitizer] [SystemZ] Implement internal_mmap.

[Marcin Koscielnicki via llvm-commits]

Author: koriakin
Date: Thu Apr 14 07:51:45 2016
New Revision: 266295

URL: http://llvm.org/viewvc/llvm-project?rev=266295&view=rev
Log:
[sanitizer] [SystemZ] Implement internal_mmap.

mmap on s390 is quite a special snowflake: since it has too many
parameters to pass them in registers, it passes a pointer to a struct
with all the parameters instead.

Differential Revision: http://reviews.llvm.org/D18889

Modified:
    compiler-rt/trunk/lib/sanitizer_common/sanitizer_linux.cc

Modified: compiler-rt/trunk/lib/sanitizer_common/sanitizer_linux.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/sanitizer_common/sanitizer_linux.cc?rev=266295&r1=266294&r2=266295&view=diff
==============================================================================
--- compiler-rt/trunk/lib/sanitizer_common/sanitizer_linux.cc (original)
+++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_linux.cc Thu Apr 14 07:51:45 2016
@@ -112,7 +112,32 @@ namespace __sanitizer {
 // --------------- sanitizer_libc.h
 uptr internal_mmap(void *addr, uptr length, int prot, int flags, int fd,
                    OFF_T offset) {
-#if SANITIZER_FREEBSD || SANITIZER_LINUX_USES_64BIT_SYSCALLS
+#ifdef __s390__
+  struct s390_mmap_params {
+    unsigned long addr;
+    unsigned long length;
+    unsigned long prot;
+    unsigned long flags;
+    unsigned long fd;
+    unsigned long offset;
+  } params = {
+    (unsigned long)addr,
+    (unsigned long)length,
+    (unsigned long)prot,
+    (unsigned long)flags,
+    (unsigned long)fd,
+# ifdef __s390x__
+    (unsigned long)offset,
+# else
+    (unsigned long)(offset / 4096),
+# endif
+  };
+# ifdef __s390x__
+  return internal_syscall(SYSCALL(mmap), &params);
+# else
+  return internal_syscall(SYSCALL(mmap2), &params);
+# endif
+#elif SANITIZER_FREEBSD || SANITIZER_LINUX_USES_64BIT_SYSCALLS
   return internal_syscall(SYSCALL(mmap), (uptr)addr, length, prot, flags, fd,
                           offset);
 #else