mirror of
https://github.com/jart/cosmopolitan.git
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1422e96b4e
There's a new program named ape/ape-m1.c which will be used to build an embeddable binary that can load ape and elf executables. The support is mostly working so far, but still chasing down ABI issues.
114 lines
5.3 KiB
C
114 lines
5.3 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 & (NSIG - 1)];
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if (rva >= kSigactionMinRva) {
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flags = __sighandflags[sig & (NSIG - 1)];
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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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*g.uc.uc_mcontext.fpregs = *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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*ctx->sc_fpstate = *g.uc.uc_mcontext.fpregs;
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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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