1*c9945492SAndroid Build Coastguard Worker #include <unistd.h>
2*c9945492SAndroid Build Coastguard Worker #include <sys/mman.h>
3*c9945492SAndroid Build Coastguard Worker #include <errno.h>
4*c9945492SAndroid Build Coastguard Worker #include <stdint.h>
5*c9945492SAndroid Build Coastguard Worker #include <limits.h>
6*c9945492SAndroid Build Coastguard Worker #include "syscall.h"
7*c9945492SAndroid Build Coastguard Worker
dummy(void)8*c9945492SAndroid Build Coastguard Worker static void dummy(void) { }
9*c9945492SAndroid Build Coastguard Worker weak_alias(dummy, __vm_wait);
10*c9945492SAndroid Build Coastguard Worker
11*c9945492SAndroid Build Coastguard Worker #define UNIT SYSCALL_MMAP2_UNIT
12*c9945492SAndroid Build Coastguard Worker #define OFF_MASK ((-0x2000ULL << (8*sizeof(syscall_arg_t)-1)) | (UNIT-1))
13*c9945492SAndroid Build Coastguard Worker
__mmap(void * start,size_t len,int prot,int flags,int fd,off_t off)14*c9945492SAndroid Build Coastguard Worker void *__mmap(void *start, size_t len, int prot, int flags, int fd, off_t off)
15*c9945492SAndroid Build Coastguard Worker {
16*c9945492SAndroid Build Coastguard Worker long ret;
17*c9945492SAndroid Build Coastguard Worker if (off & OFF_MASK) {
18*c9945492SAndroid Build Coastguard Worker errno = EINVAL;
19*c9945492SAndroid Build Coastguard Worker return MAP_FAILED;
20*c9945492SAndroid Build Coastguard Worker }
21*c9945492SAndroid Build Coastguard Worker if (len >= PTRDIFF_MAX) {
22*c9945492SAndroid Build Coastguard Worker errno = ENOMEM;
23*c9945492SAndroid Build Coastguard Worker return MAP_FAILED;
24*c9945492SAndroid Build Coastguard Worker }
25*c9945492SAndroid Build Coastguard Worker if (flags & MAP_FIXED) {
26*c9945492SAndroid Build Coastguard Worker __vm_wait();
27*c9945492SAndroid Build Coastguard Worker }
28*c9945492SAndroid Build Coastguard Worker #ifdef SYS_mmap2
29*c9945492SAndroid Build Coastguard Worker ret = __syscall(SYS_mmap2, start, len, prot, flags, fd, off/UNIT);
30*c9945492SAndroid Build Coastguard Worker #else
31*c9945492SAndroid Build Coastguard Worker ret = __syscall(SYS_mmap, start, len, prot, flags, fd, off);
32*c9945492SAndroid Build Coastguard Worker #endif
33*c9945492SAndroid Build Coastguard Worker /* Fixup incorrect EPERM from kernel. */
34*c9945492SAndroid Build Coastguard Worker if (ret == -EPERM && !start && (flags&MAP_ANON) && !(flags&MAP_FIXED))
35*c9945492SAndroid Build Coastguard Worker ret = -ENOMEM;
36*c9945492SAndroid Build Coastguard Worker return (void *)__syscall_ret(ret);
37*c9945492SAndroid Build Coastguard Worker }
38*c9945492SAndroid Build Coastguard Worker
39*c9945492SAndroid Build Coastguard Worker weak_alias(__mmap, mmap);
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