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Incorporate more small improvements

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Justine Tunney 2023-07-23 10:57:18 -07:00
parent 1d4eb08fa1
commit f83eb440f7
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GPG key ID: BE714B4575D6E328
20 changed files with 121 additions and 256 deletions
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12
libc/sysv/errno.c
View file

@ -17,6 +17,7 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/errno.h"
#include "libc/thread/tls.h"
/**
* Global variable for last error.
@ -31,3 +32,14 @@
* @see __errno_location() stable abi
*/
errno_t __errno;
/**
* Returns address of `errno` variable.
*/
errno_t *__errno_location(void) {
if (__tls_enabled) {
return &__get_tls()->tib_errno;
} else {
return &__errno;
}
}

29
libc/sysv/errno_location.greg.c
View file

@ -1,29 +0,0 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/thread/tls2.h"
extern errno_t __errno;
/**
* Returns address of errno variable.
*/
nocallersavedregisters errno_t *(__errno_location)(void) {
if (!__tls_enabled) return &__errno;
return &__get_tls_privileged()->tib_errno;
}

1
libc/sysv/sysv.mk
View file

@ -40,7 +40,6 @@ LIBC_SYSV_A_FILES := \
libc/sysv/restorert.S \
libc/sysv/syscall.S \
libc/sysv/systemfive.S \
libc/sysv/errno_location.greg.c \
libc/sysv/sysret.c \
libc/sysv/errno.c \
libc/sysv/errfun.S \