X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fmman%2Fmmap.c;h=eff88d82a8fcff843247a5436f42016690daac24;hb=d4f987e4ac44e4e5ca2bcf68365b4c2b77bdf2d0;hp=b85f25ca083e8aeff9a20f645a2e4d0f4bd701b6;hpb=f08ab9e61a147630497198fe3239149275c0a3f4;p=musl

diff --git a/src/mman/mmap.c b/src/mman/mmap.c
index b85f25ca..eff88d82 100644
--- a/src/mman/mmap.c
+++ b/src/mman/mmap.c
@@ -4,16 +4,16 @@
 #include <stdint.h>
 #include <limits.h>
 #include "syscall.h"
-#include "libc.h"
 
 static void dummy(void) { }
 weak_alias(dummy, __vm_wait);
 
 #define UNIT SYSCALL_MMAP2_UNIT
-#define OFF_MASK ((-0x2000ULL << (8*sizeof(long)-1)) | (UNIT-1))
+#define OFF_MASK ((-0x2000ULL << (8*sizeof(syscall_arg_t)-1)) | (UNIT-1))
 
 void *__mmap(void *start, size_t len, int prot, int flags, int fd, off_t off)
 {
+	long ret;
 	if (off & OFF_MASK) {
 		errno = EINVAL;
 		return MAP_FAILED;
@@ -26,12 +26,16 @@ void *__mmap(void *start, size_t len, int prot, int flags, int fd, off_t off)
 		__vm_wait();
 	}
 #ifdef SYS_mmap2
-	return (void *)syscall(SYS_mmap2, start, len, prot, flags, fd, off/UNIT);
+	ret = __syscall(SYS_mmap2, start, len, prot, flags, fd, off/UNIT);
 #else
-	return (void *)syscall(SYS_mmap, start, len, prot, flags, fd, off);
+	ret = __syscall(SYS_mmap, start, len, prot, flags, fd, off);
 #endif
+	/* Fixup incorrect EPERM from kernel. */
+	if (ret == -EPERM && !start && (flags&MAP_ANON) && !(flags&MAP_FIXED))
+		ret = -ENOMEM;
+	return (void *)__syscall_ret(ret);
 }
 
 weak_alias(__mmap, mmap);
 
-LFS64(mmap);
+weak_alias(mmap, mmap64);