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Support thread local storage

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Justine Tunney 2022-05-16 13:20:08 -07:00
parent 91ee2b19d4
commit 55de4ca6b5
197 changed files with 1483 additions and 874 deletions
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79
libc/runtime/morph.greg.c Normal file
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/*-*- 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 2022 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. │
╚─────────────────────────────────────────────────────────────────────────────*/
#define ShouldUseMsabiAttribute() 1
#include "libc/bits/asmflag.h"
#include "libc/calls/internal.h"
#include "libc/calls/sigbits.h"
#include "libc/calls/struct/sigset.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/kprintf.h"
#include "libc/nt/enum/pageflags.h"
#include "libc/nt/memory.h"
#include "libc/nt/runtime.h"
#include "libc/nt/thunk/msabi.h"
#include "libc/runtime/runtime.h"
#include "libc/sysv/consts/nr.h"
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/consts/sig.h"
__msabi extern typeof(VirtualProtect) *const __imp_VirtualProtect;
static int64_t vector;
static sigset_t oldss;
static privileged void __morph_mprotect(void *addr, size_t size, int prot,
int ntprot) {
int ax, dx;
uint32_t op;
if (!IsWindows()) {
asm volatile("syscall"
: "=a"(ax), "=d"(dx)
: "0"(__NR_mprotect), "D"(addr), "S"(size), "1"(prot)
: "rcx", "r11", "memory");
} else {
__imp_VirtualProtect(addr, size, ntprot, &op);
}
}
/**
* Begins code morphing execuatble.
*
* @return 0 on success, or -1 w/ errno
*/
privileged void __morph_begin(void) {
sigset_t ss;
if (!IsWindows()) {
sigfillset(&ss);
sys_sigprocmask(SIG_BLOCK, &ss, &oldss);
}
__morph_mprotect(_base, __privileged_addr - _base, PROT_READ | PROT_WRITE,
kNtPageWritecopy);
}
/**
* Begins code morphing execuatble.
*/
privileged void __morph_end(void) {
__morph_mprotect(_base, __privileged_addr - _base, PROT_READ | PROT_EXEC,
kNtPageExecuteRead);
if (!IsWindows()) {
sys_sigprocmask(SIG_SETMASK, &oldss, 0);
}
}