mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-17 11:02:42 +00:00
68c7c9c1e0
- Use good ELF technique in cosmo_dlopen() - Make strerror() conform more to other libc impls - Introduce __clear_cache() and use it in cosmo_dlopen() - Remove libc/fmt/fmt.h header (trying to kill off LIBC_FMT)
38 lines
2.4 KiB
C
38 lines
2.4 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 2023 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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void __clear_cache2(const void *base, const void *end) {
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#ifdef __aarch64__
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int icache, dcache;
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const char *p, *pe = end;
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static unsigned int ctr_el0 = 0;
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if (!ctr_el0) asm volatile("mrs\t%0,ctr_el0" : "=r"(ctr_el0));
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icache = 4 << (ctr_el0 & 15);
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dcache = 4 << ((ctr_el0 >> 16) & 15);
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for (p = (const char *)((uintptr_t)base & -dcache); p < pe; p += dcache) {
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asm volatile("dc\tcvau,%0" : : "r"(p) : "memory");
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}
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asm volatile("dsb\tish" ::: "memory");
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for (p = (const char *)((uintptr_t)base & -icache); p < pe; p += icache) {
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asm volatile("ic\tivau,%0" : : "r"(p) : "memory");
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}
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asm volatile("dsb\tish\nisb" ::: "memory");
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#endif
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}
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