mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
125 lines
6.6 KiB
C
125 lines
6.6 KiB
C
/*-*- 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 2021 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/calls.h"
|
|
#include "libc/calls/internal.h"
|
|
#include "libc/calls/state.internal.h"
|
|
#include "libc/calls/struct/sigaction-freebsd.internal.h"
|
|
#include "libc/calls/struct/sigaction.h"
|
|
#include "libc/calls/struct/siginfo-freebsd.internal.h"
|
|
#include "libc/calls/struct/siginfo.h"
|
|
#include "libc/calls/struct/ucontext-freebsd.internal.h"
|
|
#include "libc/calls/ucontext.h"
|
|
#include "libc/log/libfatal.internal.h"
|
|
#include "libc/macros.internal.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/sysv/consts/sa.h"
|
|
|
|
privileged void __sigenter_freebsd(int sig, struct siginfo_freebsd *freebsdinfo,
|
|
struct ucontext_freebsd *ctx) {
|
|
int rva, flags;
|
|
struct Goodies {
|
|
ucontext_t uc;
|
|
siginfo_t si;
|
|
} g;
|
|
rva = __sighandrvas[sig & (NSIG - 1)];
|
|
if (rva >= kSigactionMinRva) {
|
|
flags = __sighandflags[sig & (NSIG - 1)];
|
|
if (~flags & SA_SIGINFO) {
|
|
((sigaction_f)(_base + rva))(sig, 0, 0);
|
|
} else {
|
|
__repstosb(&g, 0, sizeof(g));
|
|
g.uc.uc_mcontext.fpregs = &g.uc.__fpustate;
|
|
g.uc.uc_stack.ss_sp = ctx->uc_stack.ss_sp;
|
|
g.uc.uc_stack.ss_size = ctx->uc_stack.ss_size;
|
|
g.uc.uc_stack.ss_flags = ctx->uc_stack.ss_flags;
|
|
g.uc.uc_flags = ctx->uc_flags;
|
|
__repmovsb(&g.uc.uc_sigmask, &ctx->uc_sigmask,
|
|
MIN(sizeof(g.uc.uc_sigmask), sizeof(ctx->uc_sigmask)));
|
|
g.uc.uc_mcontext.r8 = ctx->uc_mcontext.mc_r8;
|
|
g.uc.uc_mcontext.r9 = ctx->uc_mcontext.mc_r9;
|
|
g.uc.uc_mcontext.r10 = ctx->uc_mcontext.mc_r10;
|
|
g.uc.uc_mcontext.r11 = ctx->uc_mcontext.mc_r11;
|
|
g.uc.uc_mcontext.r12 = ctx->uc_mcontext.mc_r12;
|
|
g.uc.uc_mcontext.r13 = ctx->uc_mcontext.mc_r13;
|
|
g.uc.uc_mcontext.r14 = ctx->uc_mcontext.mc_r14;
|
|
g.uc.uc_mcontext.r15 = ctx->uc_mcontext.mc_r15;
|
|
g.uc.uc_mcontext.rdi = ctx->uc_mcontext.mc_rdi;
|
|
g.uc.uc_mcontext.rsi = ctx->uc_mcontext.mc_rsi;
|
|
g.uc.uc_mcontext.rbp = ctx->uc_mcontext.mc_rbp;
|
|
g.uc.uc_mcontext.rbx = ctx->uc_mcontext.mc_rbx;
|
|
g.uc.uc_mcontext.rdx = ctx->uc_mcontext.mc_rdx;
|
|
g.uc.uc_mcontext.rax = ctx->uc_mcontext.mc_rax;
|
|
g.uc.uc_mcontext.rcx = ctx->uc_mcontext.mc_rcx;
|
|
g.uc.uc_mcontext.rsp = ctx->uc_mcontext.mc_rsp;
|
|
g.uc.uc_mcontext.rip = ctx->uc_mcontext.mc_rip;
|
|
g.uc.uc_mcontext.eflags = ctx->uc_mcontext.mc_flags;
|
|
g.uc.uc_mcontext.fs = ctx->uc_mcontext.mc_fs;
|
|
g.uc.uc_mcontext.gs = ctx->uc_mcontext.mc_gs;
|
|
g.uc.uc_mcontext.err = ctx->uc_mcontext.mc_err;
|
|
g.uc.uc_mcontext.trapno = ctx->uc_mcontext.mc_trapno;
|
|
__repmovsb(&g.uc.__fpustate, &ctx->uc_mcontext.mc_fpstate, 512);
|
|
g.si.si_signo = freebsdinfo->si_signo;
|
|
g.si.si_errno = freebsdinfo->si_errno;
|
|
g.si.si_code = freebsdinfo->si_code;
|
|
if (freebsdinfo->si_pid) {
|
|
g.si.si_pid = freebsdinfo->si_pid;
|
|
g.si.si_uid = freebsdinfo->si_uid;
|
|
} else {
|
|
g.si.si_addr = (void *)freebsdinfo->si_addr;
|
|
}
|
|
g.si.si_value = freebsdinfo->si_value;
|
|
((sigaction_f)(_base + rva))(sig, &g.si, &g.uc);
|
|
ctx->uc_stack.ss_sp = g.uc.uc_stack.ss_sp;
|
|
ctx->uc_stack.ss_size = g.uc.uc_stack.ss_size;
|
|
ctx->uc_stack.ss_flags = g.uc.uc_stack.ss_flags;
|
|
ctx->uc_flags = g.uc.uc_flags;
|
|
__repmovsb(&ctx->uc_sigmask, &g.uc.uc_sigmask,
|
|
MIN(sizeof(g.uc.uc_sigmask), sizeof(ctx->uc_sigmask)));
|
|
ctx->uc_mcontext.mc_rdi = g.uc.uc_mcontext.rdi;
|
|
ctx->uc_mcontext.mc_rsi = g.uc.uc_mcontext.rsi;
|
|
ctx->uc_mcontext.mc_rdx = g.uc.uc_mcontext.rdx;
|
|
ctx->uc_mcontext.mc_rcx = g.uc.uc_mcontext.rcx;
|
|
ctx->uc_mcontext.mc_r8 = g.uc.uc_mcontext.r8;
|
|
ctx->uc_mcontext.mc_r9 = g.uc.uc_mcontext.r9;
|
|
ctx->uc_mcontext.mc_rax = g.uc.uc_mcontext.rax;
|
|
ctx->uc_mcontext.mc_rbx = g.uc.uc_mcontext.rbx;
|
|
ctx->uc_mcontext.mc_rbp = g.uc.uc_mcontext.rbp;
|
|
ctx->uc_mcontext.mc_r10 = g.uc.uc_mcontext.r10;
|
|
ctx->uc_mcontext.mc_r11 = g.uc.uc_mcontext.r11;
|
|
ctx->uc_mcontext.mc_r12 = g.uc.uc_mcontext.r12;
|
|
ctx->uc_mcontext.mc_r13 = g.uc.uc_mcontext.r13;
|
|
ctx->uc_mcontext.mc_r14 = g.uc.uc_mcontext.r14;
|
|
ctx->uc_mcontext.mc_r15 = g.uc.uc_mcontext.r15;
|
|
ctx->uc_mcontext.mc_trapno = g.uc.uc_mcontext.trapno;
|
|
ctx->uc_mcontext.mc_fs = g.uc.uc_mcontext.fs;
|
|
ctx->uc_mcontext.mc_gs = g.uc.uc_mcontext.gs;
|
|
ctx->uc_mcontext.mc_flags = g.uc.uc_mcontext.eflags;
|
|
ctx->uc_mcontext.mc_err = g.uc.uc_mcontext.err;
|
|
ctx->uc_mcontext.mc_rip = g.uc.uc_mcontext.rip;
|
|
ctx->uc_mcontext.mc_rsp = g.uc.uc_mcontext.rsp;
|
|
__repmovsb(&ctx->uc_mcontext.mc_fpstate, &g.uc.__fpustate, 512);
|
|
}
|
|
}
|
|
/*
|
|
* When the FreeBSD kernel invokes this signal handler it pushes a
|
|
* trampoline on the stack which does two things: 1) it calls this
|
|
* function, and 2) calls sys_sigreturn() once this returns.
|
|
*/
|
|
}
|