mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
e75ffde09e
You can now build Cosmopolitan with Clang:
make -j8 MODE=llvm
o/llvm/examples/hello.com
The assembler and linker code is now friendly to LLVM too.
So it's not needed to configure Clang to use binutils under
the hood. If you love LLVM then you can now use pure LLVM.
76 lines
3.4 KiB
C
76 lines
3.4 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 2020 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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#define ShouldUseMsabiAttribute() 1
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#include "libc/dce.h"
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#include "libc/nt/files.h"
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#include "libc/nt/runtime.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/fileno.h"
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#include "libc/sysv/consts/nr.h"
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/* TODO(jart): DELETE */
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#define WasImported(SLOT) \
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((void *)*SLOT && *SLOT != (void *)&missingno /* see libc/crt/crt.S */)
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static void __sys_print_nt(const void *data, size_t len) {
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int64_t hand;
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char xmm[256];
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uint32_t wrote;
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savexmm(xmm + 128);
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hand = __imp_GetStdHandle(kNtStdErrorHandle);
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__imp_WriteFile(hand, data, len, &wrote, NULL);
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loadxmm(xmm + 128);
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}
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/**
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* Prints string, by any means necessary.
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*
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* This function offers a subset of write(STDERR_FILENO) functionality.
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* It's designed to work even when the runtime hasn't initialized, e.g.
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* before _init() gets called.
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*
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* @param len can be computed w/ tinystrlen()
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* @clob nothing except flags
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*/
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privileged noinline void __print(const void *data, size_t len) {
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int64_t ax, ordinal;
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if (WasImported(__imp_WriteFile)) {
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__sys_print_nt(data, len);
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} else {
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ordinal = __NR_write > 0 ? __NR_write : IsXnu() ? 0x2000004 : 4;
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asm volatile("syscall"
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: "=a"(ax)
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: "0"(ordinal), "D"(STDERR_FILENO), "S"(data), "d"(len)
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: "rcx", "r11", "memory", "cc");
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if (ax == -1 && !__hostos && !__NR_write) {
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asm volatile("syscall"
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: "=a"(ax)
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: "0"(ordinal), "D"(STDERR_FILENO), "S"(data), "d"(len)
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: "rcx", "r11", "memory", "cc");
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}
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}
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}
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void __print_string(const char *s) {
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size_t n = 0;
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while (s[n]) ++n;
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__print(s, n);
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}
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