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Make considerably more progress on AARCH64

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- Utilities like pledge.com now build
- kprintf() will no longer balk at 48-bit addresses
- There's a new aarch64-dbg build mode that should work
- gc() and defer() are mostly pacified; avoid using them on aarch64
- THIRD_PART_STB now has Arm Neon intrinsics for fast image handling
This commit is contained in:
Justine Tunney 2023-05-12 22:42:57 -07:00
parent 1bfb3aab1b
commit fd34ef732d
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GPG key ID: BE714B4575D6E328
91 changed files with 1288 additions and 1192 deletions
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39
libc/runtime/fork-sysv.c
View file

@ -19,6 +19,7 @@
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/sysv/consts/sig.h"
#include "libc/sysv/errfuns.h"
int sys_fork(void) {
#ifdef __x86_64__
@ -37,23 +38,27 @@ int sys_fork(void) {
#elif defined(__aarch64__)
int flags = 17; // SIGCHLD;
void *child_stack = 0;
void *parent_tidptr = 0;
void *newtls = 0;
void *child_tidptr = 0;
register long r0 asm("x0") = (long)flags;
register long r1 asm("x1") = (long)child_stack;
register long r2 asm("x2") = (long)parent_tidptr;
register long r3 asm("x3") = (long)newtls;
register long r4 asm("x4") = (long)child_tidptr;
register long res_x0 asm("x0");
asm volatile("mov\tx8,%1\n\t"
"svc\t0"
: "=r"(res_x0)
: "i"(220), "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4)
: "x8", "memory");
return _sysret(res_x0);
if (IsLinux()) {
int flags = 17; // SIGCHLD;
void *child_stack = 0;
void *parent_tidptr = 0;
void *newtls = 0;
void *child_tidptr = 0;
register long r0 asm("x0") = (long)flags;
register long r1 asm("x1") = (long)child_stack;
register long r2 asm("x2") = (long)parent_tidptr;
register long r3 asm("x3") = (long)newtls;
register long r4 asm("x4") = (long)child_tidptr;
register long res_x0 asm("x0");
asm volatile("mov\tx8,%1\n\t"
"svc\t0"
: "=r"(res_x0)
: "i"(220), "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4)
: "x8", "memory");
return _sysret(res_x0);
} else {
return enosys();
}
#endif
}