mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-12 16:42:41 +00:00
a4b455185b
Renaming gc() to _gc() was a mistake since the better thing to do is put it behind the _COSMO_SOURCE macro. We need this change because I haven't wanted to use my amazing garbage collector ever since we renamed it. You now need to define _COSMO_SOURCE yourself when using amalgamation header and cosmocc users need to pass the -mcosmo flag to get the gc() function Some other issues relating to cancelation have been fixed along the way. We're also now putting cosmocc in a folder named `.cosmocc` so it can be more safely excluded by grep --exclude-dir=.cosmocc --exclude-dir=o etc.
49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
#ifndef COSMOPOLITAN_LIBC_THREAD_TLS2_H_
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#define COSMOPOLITAN_LIBC_THREAD_TLS2_H_
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#include "libc/dce.h"
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#include "libc/thread/tls.h"
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COSMOPOLITAN_C_START_
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#if defined(__GNUC__) && defined(__x86_64__) && !defined(__STRICT_ANSI__)
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/**
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* Returns location of thread information block.
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*
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* This should be favored over __get_tls() for .privileged code that
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* can't be self-modified by __enable_tls().
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*/
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forceinline struct CosmoTib *__get_tls_privileged(void) {
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char *tib, *lin = (char *)0x30;
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if (IsLinux() || IsFreebsd() || IsNetbsd() || IsOpenbsd() || IsMetal()) {
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if (!__tls_morphed) {
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asm("mov\t%%fs:(%1),%0" : "=a"(tib) : "r"(lin) : "memory");
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} else {
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asm("mov\t%%gs:(%1),%0" : "=a"(tib) : "r"(lin) : "memory");
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}
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} else {
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asm("mov\t%%gs:(%1),%0" : "=a"(tib) : "r"(lin) : "memory");
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if (IsWindows()) {
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tib = *(char **)(tib + 0x1480 + __tls_index * 8);
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}
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}
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return (struct CosmoTib *)tib;
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}
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forceinline struct CosmoTib *__get_tls_win32(void) {
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char *tib, *lin = (char *)0x30;
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asm("mov\t%%gs:(%1),%0" : "=a"(tib) : "r"(lin) : "memory");
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tib = *(char **)(tib + 0x1480 + __tls_index * 8);
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return (struct CosmoTib *)tib;
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}
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forceinline void __set_tls_win32(void *tls) {
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asm("mov\t%1,%%gs:%0" : "=m"(*((long *)0x1480 + __tls_index)) : "r"(tls));
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}
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#elif defined(__aarch64__)
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#define __get_tls_privileged() __get_tls()
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#define __get_tls_win32() ((struct CosmoTib *)0)
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#define __set_tls_win32(tls) (void)0
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#endif /* GNU x86-64 */
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COSMOPOLITAN_C_END_
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#endif /* COSMOPOLITAN_LIBC_THREAD_TLS2_H_ */
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