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53 lines
2.8 KiB
C
53 lines
2.8 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 2022 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.h"
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#include "libc/calls/ucontext.h"
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#include "libc/intrin/likely.h"
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#include "libc/log/libfatal.internal.h"
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#include "libc/math.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_wsl(int sig, struct siginfo *info, ucontext_t *ctx) {
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int i, rva, flags;
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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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// WSL1 doesn't set the fpregs field.
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// https://github.com/microsoft/WSL/issues/2555
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if ((flags & SA_SIGINFO) && UNLIKELY(!ctx->uc_mcontext.fpregs)) {
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ctx->uc_mcontext.fpregs = &ctx->__fpustate;
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for (i = 0; i < 8; ++i) {
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long double nan = NAN;
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__memcpy(ctx->__fpustate.st + i, &nan, 16);
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}
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}
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((sigaction_f)(__executable_start + rva))(sig, info, ctx);
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}
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}
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#endif /* __x86_64__ */
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