mirror of
https://github.com/jart/cosmopolitan.git
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117 lines
5.4 KiB
C
117 lines
5.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "ape/sections.internal.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/state.internal.h"
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#include "libc/calls/struct/sigaction.h"
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#include "libc/calls/struct/siginfo-meta.internal.h"
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#include "libc/calls/struct/siginfo-openbsd.internal.h"
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#include "libc/calls/struct/siginfo.h"
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#include "libc/calls/struct/ucontext-openbsd.internal.h"
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#include "libc/calls/ucontext.h"
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#include "libc/log/libfatal.internal.h"
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#include "libc/macros.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/sa.h"
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#ifdef __x86_64__
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privileged void __sigenter_openbsd(int sig, struct siginfo_openbsd *openbsdinfo,
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struct ucontext_openbsd *ctx) {
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int rva, flags;
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struct Goodies {
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ucontext_t uc;
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struct siginfo si;
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} g;
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rva = __sighandrvas[sig];
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if (rva >= kSigactionMinRva) {
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flags = __sighandflags[sig];
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if (~flags & SA_SIGINFO) {
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((sigaction_f)(__executable_start + rva))(sig, 0, 0);
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} else {
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__repstosb(&g.uc, 0, sizeof(g.uc));
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__siginfo2cosmo(&g.si, (void *)openbsdinfo);
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g.uc.uc_mcontext.fpregs = &g.uc.__fpustate;
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g.uc.uc_sigmask.__bits[0] = ctx->sc_mask;
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g.uc.uc_sigmask.__bits[1] = 0;
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g.uc.uc_mcontext.rdi = ctx->sc_rdi;
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g.uc.uc_mcontext.rsi = ctx->sc_rsi;
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g.uc.uc_mcontext.rdx = ctx->sc_rdx;
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g.uc.uc_mcontext.rcx = ctx->sc_rcx;
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g.uc.uc_mcontext.r8 = ctx->sc_r8;
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g.uc.uc_mcontext.r9 = ctx->sc_r9;
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g.uc.uc_mcontext.rax = ctx->sc_rax;
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g.uc.uc_mcontext.rbx = ctx->sc_rbx;
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g.uc.uc_mcontext.rbp = ctx->sc_rbp;
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g.uc.uc_mcontext.r10 = ctx->sc_r10;
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g.uc.uc_mcontext.r11 = ctx->sc_r11;
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g.uc.uc_mcontext.r12 = ctx->sc_r12;
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g.uc.uc_mcontext.r13 = ctx->sc_r13;
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g.uc.uc_mcontext.r14 = ctx->sc_r14;
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g.uc.uc_mcontext.r15 = ctx->sc_r15;
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g.uc.uc_mcontext.trapno = ctx->sc_trapno;
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g.uc.uc_mcontext.fs = ctx->sc_fs;
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g.uc.uc_mcontext.gs = ctx->sc_gs;
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g.uc.uc_mcontext.err = ctx->sc_err;
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g.uc.uc_mcontext.rip = ctx->sc_rip;
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g.uc.uc_mcontext.rsp = ctx->sc_rsp;
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if (ctx->sc_fpstate) {
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__repmovsb(g.uc.uc_mcontext.fpregs, ctx->sc_fpstate,
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sizeof(*ctx->sc_fpstate));
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}
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((sigaction_f)(__executable_start + rva))(sig, &g.si, &g.uc);
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ctx->sc_mask = g.uc.uc_sigmask.__bits[0];
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ctx->sc_rdi = g.uc.uc_mcontext.rdi;
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ctx->sc_rsi = g.uc.uc_mcontext.rsi;
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ctx->sc_rdx = g.uc.uc_mcontext.rdx;
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ctx->sc_rcx = g.uc.uc_mcontext.rcx;
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ctx->sc_r8 = g.uc.uc_mcontext.r8;
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ctx->sc_r9 = g.uc.uc_mcontext.r9;
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ctx->sc_rax = g.uc.uc_mcontext.rax;
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ctx->sc_rbx = g.uc.uc_mcontext.rbx;
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ctx->sc_rbp = g.uc.uc_mcontext.rbp;
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ctx->sc_r10 = g.uc.uc_mcontext.r10;
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ctx->sc_r11 = g.uc.uc_mcontext.r11;
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ctx->sc_r12 = g.uc.uc_mcontext.r12;
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ctx->sc_r13 = g.uc.uc_mcontext.r13;
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ctx->sc_r14 = g.uc.uc_mcontext.r14;
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ctx->sc_r15 = g.uc.uc_mcontext.r15;
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ctx->sc_trapno = g.uc.uc_mcontext.trapno;
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ctx->sc_fs = g.uc.uc_mcontext.fs;
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ctx->sc_gs = g.uc.uc_mcontext.gs;
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ctx->sc_err = g.uc.uc_mcontext.err;
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ctx->sc_rip = g.uc.uc_mcontext.rip;
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ctx->sc_rsp = g.uc.uc_mcontext.rsp;
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if (ctx->sc_fpstate) {
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__repmovsb(ctx->sc_fpstate, g.uc.uc_mcontext.fpregs,
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sizeof(*ctx->sc_fpstate));
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}
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}
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}
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/*
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* When the OpenBSD kernel invokes this signal handler it pushes a
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* trampoline on the stack which does two things: 1) it calls this
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* function, and 2) calls sys_sigreturn() once this returns.
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*/
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}
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#endif /* __x86_64__ */
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