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Make more code aarch64 friendly

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This commit is contained in:
Justine Tunney 2023-05-02 13:38:16 -07:00
parent ca2860947f
commit 2b73e72d59
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GPG key ID: BE714B4575D6E328
568 changed files with 2197 additions and 1061 deletions
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24
libc/intrin/directmap.c
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@ -37,6 +37,7 @@
*/
struct DirectMap sys_mmap(void *addr, size_t size, int prot, int flags, int fd,
int64_t off) {
#ifdef __x86_64__
struct DirectMap d;
if (!IsWindows() && !IsMetal()) {
d.addr = __sys_mmap(addr, size, prot, flags, fd, off, off);
@ -51,4 +52,27 @@ struct DirectMap sys_mmap(void *addr, size_t size, int prot, int flags, int fd,
DescribeProtFlags(prot), DescribeMapFlags(flags), fd, off, d.addr,
d.maphandle);
return d;
#elif defined(__aarch64__)
register long r0 asm("x0") = (long)addr;
register long r1 asm("x1") = (long)size;
register long r2 asm("x2") = (long)prot;
register long r3 asm("x3") = (long)flags;
register long r4 asm("x4") = (long)fd;
register long r5 asm("x5") = (long)off;
register long res_x0 asm("x0");
long res;
asm volatile("mov\tx8,%1\n"
"svc\t0"
: "=r"(res_x0)
: "i"(222), "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5)
: "x8", "memory");
res = res_x0;
if ((unsigned long)res >= (unsigned long)-4095) {
errno = (int)-res;
res = -1;
}
return (struct DirectMap){(void *)res, kNtInvalidHandleValue};
#else
#error "arch unsupported"
#endif
}