Remove unused first argument from _mmap_js. NFC (#17011)

Author: sbc100

src/library_syscall.js

@@ -113,18 +113,14 @@ var SyscallsLibrary = {
 #endif // SYSCALLS_REQUIRE_FILESYSTEM
   },
 
-  _mmap_js__sig: 'pppiiipp',
+  _mmap_js__sig: 'ppiiipp',
   _mmap_js__deps: ['$SYSCALLS',
 #if FILESYSTEM && SYSCALLS_REQUIRE_FILESYSTEM
     '$FS',
 #endif
   ],
-  _mmap_js: function(addr, len, prot, flags, fd, off, allocated) {
+  _mmap_js: function(len, prot, flags, fd, off, allocated) {
 #if FILESYSTEM && SYSCALLS_REQUIRE_FILESYSTEM
-    if (addr !== 0) {
-      // We don't currently support location hints for the address of the mapping
-      return -{{{ cDefine('EINVAL') }}};
-    }
     var stream = FS.getStream(fd);
     if (!stream) return -{{{ cDefine('EBADF') }}};
     var res = FS.mmap(stream, len, off, prot, flags);

system/lib/libc/emscripten_mmap.c

@@ -34,7 +34,7 @@ static volatile int lock[1];
 static struct map* mappings;
 
 // JS library functions.  Used only when mapping files (not MAP_ANONYMOUS)
-intptr_t _mmap_js(intptr_t addr, size_t length, int prot, int flags, int fd, size_t offset, int* allocated);
+intptr_t _mmap_js(size_t length, int prot, int flags, int fd, size_t offset, int* allocated);
 int _munmap_js(intptr_t addr, size_t length, int prot, int flags, int fd, size_t offset);
 int _msync_js(intptr_t addr, size_t length, int flags, int fd);
 
@@ -109,8 +109,8 @@ int __syscall_msync(intptr_t addr, size_t len, int flags) {
 }
 
 intptr_t __syscall_mmap2(intptr_t addr, size_t len, int prot, int flags, int fd, size_t off) {
-  // addr argument must be page aligned if MAP_FIXED flag is set.
-  if (flags & MAP_FIXED && ((intptr_t)addr % WASM_PAGE_SIZE) != 0) {
+  if (addr != 0) {
+    // We don't currently support location hints for the address of the mapping
     return -EINVAL;
   }
 
@@ -133,7 +133,7 @@ intptr_t __syscall_mmap2(intptr_t addr, size_t len, int prot, int flags, int fd,
     new_map->allocated = true;
   } else {
     new_map = emscripten_builtin_malloc(sizeof(struct map));
-    long rtn = _mmap_js(addr, len, prot, flags, fd, off, &new_map->allocated);
+    long rtn = _mmap_js(len, prot, flags, fd, off, &new_map->allocated);
     if (rtn < 0) {
       emscripten_builtin_free(new_map);
       return rtn;

system/lib/standalone/standalone.c

@@ -69,8 +69,7 @@ const unsigned char * __map_file(const char *pathname, size_t *size) {
   return NULL;
 }
 
-intptr_t _mmap_js(intptr_t addr,
-                  size_t length,
+intptr_t _mmap_js(size_t length,
                   int prot,
                   int flags,
                   int fd,