mirror of
https://github.com/jart/cosmopolitan.git
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daf4454a06
- Work towards improving non-optimized build support - Introduce MODE=zero which is -O0 without ASAN/UBSAN - Use system GCC when ~/.cosmo.mk has USE_SYSTEM_TOOLCHAIN=1 - Have package.com check .privileged code doesn't call non-privileged
37 lines
2.2 KiB
C
37 lines
2.2 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 "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sysv/consts/pr.h"
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bool __is_linux_2_6_23(void) {
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#ifdef __x86_64__
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int rc;
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if (!IsLinux()) return false;
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if (IsGenuineBlink()) return true;
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asm volatile("syscall"
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: "=a"(rc)
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: "0"(157), "D"(PR_GET_SECCOMP)
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: "rcx", "r11", "memory");
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return rc != -EINVAL;
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#else
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return true;
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#endif
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}
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