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Improve threading support further

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This commit is contained in:
Justine Tunney 2022-05-17 04:14:28 -07:00
parent 8bfb70ca3f
commit ce71677156
61 changed files with 882 additions and 747 deletions
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40
libc/sysv/errno.greg.c
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@ -19,7 +19,8 @@
#include "libc/bits/weaken.h"
#include "libc/calls/calls.h"
#include "libc/dce.h"
#include "libc/intrin/threaded.internal.h"
#include "libc/intrin/threaded.h"
#include "libc/nt/thread.h"
/**
* Global variable for last error.
@ -34,22 +35,29 @@
* @see __errno_location() stable abi
*/
errno_t __errno;
int __errno_index;
privileged nocallersavedregisters errno_t *(__errno_location)(void) {
char *tib;
if (!__hastls) {
return &__errno;
} else if (IsLinux() || IsFreebsd() || IsNetbsd() || IsOpenbsd()) {
asm("mov\t%%fs:0,%0" : "=a"(tib));
return (errno_t *)(tib + 0x3c);
} else if (IsXnu()) {
asm("mov\t%%gs:0x30,%0" : "=a"(tib));
return (errno_t *)(tib + 0x3c);
} else if (IsWindows()) {
asm("mov\t%%gs:0x30,%0" : "=a"(tib));
return (errno_t *)(tib + 0x1480 + __errno_index * 8);
/**
* Returns address of thread information block.
* @see __install_tls()
* @see clone()
*/
privileged nocallersavedregisters char *__get_tls(void) {
char *tib, *linear = (char *)0x30;
if (IsLinux() || IsFreebsd() || IsNetbsd() || IsOpenbsd()) {
asm("mov\t%%fs:(%1),%0" : "=a"(tib) : "r"(linear));
} else {
return &__errno;
asm("mov\t%%gs:(%1),%0" : "=a"(tib) : "r"(linear));
if (IsWindows()) tib = *(char **)(tib + 0x1480 + __tls_index * 8);
}
return tib;
}
/**
* Returns address of errno variable.
* @see __initialize_tls()
* @see __install_tls()
*/
privileged nocallersavedregisters errno_t *(__errno_location)(void) {
if (!__tls_enabled) return &__errno;
return (errno_t *)(__get_tls() + 0x3c);
}