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Improve dlopen() on Apple Silicon

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- Introduce MAP_JIT which is zero on other platforms
- Invent __jit_begin() and __jit_end() which wrap Apple's APIs
- Runtime dispatch to sys_icache_invalidate() in __clear_cache()
This commit is contained in:
Justine Tunney 2023-11-17 02:33:14 -08:00
parent 7a9e176ecf
commit 529cb4817c
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
20 changed files with 120 additions and 117 deletions
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8
libc/intrin/directmap.c
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@ -17,12 +17,14 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/describeflags.internal.h"
#include "libc/intrin/directmap.internal.h"
#include "libc/intrin/strace.internal.h"
#include "libc/nt/runtime.h"
#include "libc/runtime/memtrack.internal.h"
#include "libc/runtime/syslib.internal.h"
/**
* Obtains memory mapping directly from system.
@ -37,7 +39,11 @@
struct DirectMap sys_mmap(void *addr, size_t size, int prot, int flags, int fd,
int64_t off) {
struct DirectMap d;
if (!IsWindows() && !IsMetal()) {
if (IsXnuSilicon()) {
long p = _sysret(__syslib->__mmap(addr, size, prot, flags, fd, off));
d.maphandle = kNtInvalidHandleValue;
d.addr = (void *)p;
} else if (!IsWindows() && !IsMetal()) {
d.addr = __sys_mmap(addr, size, prot, flags, fd, off, off);
d.maphandle = kNtInvalidHandleValue;
} else if (IsMetal()) {

29
libc/intrin/mprotect-sysv.c Normal file
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@ -0,0 +1,29 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2023 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/runtime/syslib.internal.h"
int sys_mprotect(void *data, size_t size, int prot) {
if (IsXnuSilicon()) {
return _sysret(__syslib->__mprotect(data, size, prot));
} else {
return __sys_mprotect(data, size, prot);
}
}