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https://github.com/jart/cosmopolitan.git
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7e0a09feec
This change ports APE Loader to Linux AARCH64, so that Raspberry Pi users can run programs like redbean, without the executable needing to modify itself. Progress has also slipped into this change on the issue of making progress better conforming to user expectations and industry standards regarding which symbols we're allowed to declare
46 lines
1.5 KiB
C
46 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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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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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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privileged static inline 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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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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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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static dontasan inline 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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static dontasan inline 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 /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_THREAD_TLS2_H_ */
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