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-rw-r--r--libc/inet/resolv.c4
-rw-r--r--libc/misc/fnmatch/fnmatch.c8
-rw-r--r--libc/misc/regex/regex_old.c6
-rw-r--r--libc/misc/utmp/utent.c91
-rw-r--r--libc/sysdeps/linux/i386/bits/syscalls.h263
-rw-r--r--libc/unistd/confstr.c18
6 files changed, 229 insertions, 161 deletions
diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c
index 056539f6e..9459199da 100644
--- a/libc/inet/resolv.c
+++ b/libc/inet/resolv.c
@@ -1517,10 +1517,8 @@ int attribute_hidden __dns_lookup(const char *name,
memcpy(a, &ma, sizeof(ma));
if (a->atype != T_SIG && (NULL == a->buf || (type != T_A && type != T_AAAA)))
break;
- if (a->atype != type) {
- free(a->dotted);
+ if (a->atype != type)
continue;
- }
a->add_count = h.ancount - j - 1;
if ((a->rdlength + sizeof(struct in_addr*)) * a->add_count > a->buflen)
break;
diff --git a/libc/misc/fnmatch/fnmatch.c b/libc/misc/fnmatch/fnmatch.c
index d25619b34..0fa043bad 100644
--- a/libc/misc/fnmatch/fnmatch.c
+++ b/libc/misc/fnmatch/fnmatch.c
@@ -21,13 +21,7 @@
# include <config.h>
#endif
-/* include unistd.h before we undefine _LIBC
- * because smallint is defined in unistd.h based
- * on _LIBC. For architectures that dont define
- * smallint of there own and rely upon the definition
- * from unistd.h will not build this file otherwise
- */
-
+/* unistd.h must be included with _LIBC defined: we need smallint */
#include <unistd.h>
#include <features.h>
#ifdef __UCLIBC__
diff --git a/libc/misc/regex/regex_old.c b/libc/misc/regex/regex_old.c
index bc2ad6cb8..a3c30b51a 100644
--- a/libc/misc/regex/regex_old.c
+++ b/libc/misc/regex/regex_old.c
@@ -23,7 +23,8 @@
/* To exclude some unwanted junk.... */
#undef emacs
#include <features.h>
-
+/* unistd.h must be included with _LIBC defined: we need smallint */
+#include <unistd.h>
#ifdef __UCLIBC__
# undef _LIBC
# define _REGEX_RE_COMP
@@ -33,7 +34,6 @@
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
-#include <unistd.h>
#include <stdio.h>
/* AIX requires this to be the first thing in the file. */
@@ -263,7 +263,7 @@ static void
init_syntax_once (void)
{
register int c;
- static int done = 0;
+ static smallint done = 0;
if (done)
return;
diff --git a/libc/misc/utmp/utent.c b/libc/misc/utmp/utent.c
index a3f01b6e9..a678130a3 100644
--- a/libc/misc/utmp/utent.c
+++ b/libc/misc/utmp/utent.c
@@ -25,14 +25,26 @@
__UCLIBC_MUTEX_STATIC(utmplock, PTHREAD_MUTEX_INITIALIZER);
+/* Do not create extra unlocked functions if no locking is needed */
+#if defined __UCLIBC_HAS_THREADS__
+# define static_if_threaded static
+#else
+# define static_if_threaded /* nothing */
+# define __setutent setutent
+# define __getutent getutent
+# define __getutid getutid
+#endif
+
+
/* Some global crap */
static int static_fd = -1;
static struct utmp static_utmp;
static const char default_file_name[] = _PATH_UTMP;
static const char *static_ut_name = default_file_name;
+
/* This function must be called with the LOCK held */
-static void __setutent(void)
+static_if_threaded void __setutent(void)
{
if (static_fd < 0) {
static_fd = open_not_cancel_2(static_ut_name, O_RDWR | O_CLOEXEC);
@@ -50,20 +62,19 @@ static void __setutent(void)
}
lseek(static_fd, 0, SEEK_SET);
}
-
+#if defined __UCLIBC_HAS_THREADS__
void setutent(void)
{
__UCLIBC_MUTEX_LOCK(utmplock);
__setutent();
__UCLIBC_MUTEX_UNLOCK(utmplock);
}
+#endif
libc_hidden_def(setutent)
/* This function must be called with the LOCK held */
-static struct utmp *__getutent(void)
+static_if_threaded struct utmp *__getutent(void)
{
- struct utmp *ret = NULL;
-
if (static_fd < 0) {
__setutent();
if (static_fd < 0) {
@@ -72,11 +83,22 @@ static struct utmp *__getutent(void)
}
if (read_not_cancel(static_fd, &static_utmp, sizeof(static_utmp)) == sizeof(static_utmp)) {
- ret = &static_utmp;
+ return &static_utmp;
}
+ return NULL;
+}
+#if defined __UCLIBC_HAS_THREADS__
+struct utmp *getutent(void)
+{
+ struct utmp *ret;
+
+ __UCLIBC_MUTEX_LOCK(utmplock);
+ ret = __getutent();
+ __UCLIBC_MUTEX_UNLOCK(utmplock);
return ret;
}
+#endif
void endutent(void)
{
@@ -87,63 +109,52 @@ void endutent(void)
__UCLIBC_MUTEX_UNLOCK(utmplock);
}
-struct utmp *getutent(void)
-{
- struct utmp *ret = NULL;
-
- __UCLIBC_MUTEX_LOCK(utmplock);
- ret = __getutent();
- __UCLIBC_MUTEX_UNLOCK(utmplock);
- return ret;
-}
-
/* This function must be called with the LOCK held */
-static struct utmp *__getutid(const struct utmp *utmp_entry)
+static_if_threaded struct utmp *__getutid(const struct utmp *utmp_entry)
{
struct utmp *lutmp;
+ unsigned type;
+
+ /* We use the fact that constants we are interested in are: */
+ /* RUN_LVL=1, ... OLD_TIME=4; INIT_PROCESS=5, ... USER_PROCESS=8 */
+ type = utmp_entry->ut_type - 1;
+ type /= 4;
while ((lutmp = __getutent()) != NULL) {
- if ( (utmp_entry->ut_type == RUN_LVL ||
- utmp_entry->ut_type == BOOT_TIME ||
- utmp_entry->ut_type == NEW_TIME ||
- utmp_entry->ut_type == OLD_TIME) &&
- lutmp->ut_type == utmp_entry->ut_type)
- {
- return lutmp;
- }
- if ( (utmp_entry->ut_type == INIT_PROCESS ||
- utmp_entry->ut_type == DEAD_PROCESS ||
- utmp_entry->ut_type == LOGIN_PROCESS ||
- utmp_entry->ut_type == USER_PROCESS) &&
- !strncmp(lutmp->ut_id, utmp_entry->ut_id, sizeof(lutmp->ut_id)))
- {
- return lutmp;
- }
+ if (type == 0 && lutmp->ut_type == utmp_entry->ut_type) {
+ /* one of RUN_LVL, BOOT_TIME, NEW_TIME, OLD_TIME */
+ return lutmp;
+ }
+ if (type == 1 && strncmp(lutmp->ut_id, utmp_entry->ut_id, sizeof(lutmp->ut_id)) == 0) {
+ /* INIT_PROCESS, LOGIN_PROCESS, USER_PROCESS, DEAD_PROCESS */
+ return lutmp;
+ }
}
return NULL;
}
-
+#if defined __UCLIBC_HAS_THREADS__
struct utmp *getutid(const struct utmp *utmp_entry)
{
- struct utmp *ret = NULL;
+ struct utmp *ret;
__UCLIBC_MUTEX_LOCK(utmplock);
ret = __getutid(utmp_entry);
__UCLIBC_MUTEX_UNLOCK(utmplock);
return ret;
}
-libc_hidden_def(getutid)
+#endif
struct utmp *getutline(const struct utmp *utmp_entry)
{
- struct utmp *lutmp = NULL;
+ struct utmp *lutmp;
__UCLIBC_MUTEX_LOCK(utmplock);
while ((lutmp = __getutent()) != NULL) {
- if ((lutmp->ut_type == USER_PROCESS || lutmp->ut_type == LOGIN_PROCESS) &&
- !strcmp(lutmp->ut_line, utmp_entry->ut_line)) {
- break;
+ if (lutmp->ut_type == USER_PROCESS || lutmp->ut_type == LOGIN_PROCESS) {
+ if (strncmp(lutmp->ut_line, utmp_entry->ut_line, sizeof(lutmp->ut_line)) == 0) {
+ break;
+ }
}
}
__UCLIBC_MUTEX_UNLOCK(utmplock);
diff --git a/libc/sysdeps/linux/i386/bits/syscalls.h b/libc/sysdeps/linux/i386/bits/syscalls.h
index f9ea54ac7..0427d91cd 100644
--- a/libc/sysdeps/linux/i386/bits/syscalls.h
+++ b/libc/sysdeps/linux/i386/bits/syscalls.h
@@ -1,142 +1,189 @@
#ifndef _BITS_SYSCALLS_H
#define _BITS_SYSCALLS_H
+
#ifndef _SYSCALL_H
# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
#endif
/*
- Some of the sneaky macros in the code were taken from
- glibc-2.2.5/sysdeps/unix/sysv/linux/i386/sysdep.h
-*/
+ * Some of the sneaky macros in the code were taken from
+ * glibc-2.2.5/sysdeps/unix/sysv/linux/i386/sysdep.h
+ */
#ifndef __ASSEMBLER__
#include <errno.h>
-/* We need some help from the assembler to generate optimal code. We
- define some macros here which later will be used. */
+#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
+({ \
+ register unsigned int resultvar; \
+ __asm__ __volatile__ ( \
+ LOADARGS_##nr \
+ "movl %1, %%eax\n\t" \
+ "int $0x80\n\t" \
+ RESTOREARGS_##nr \
+ : "=a" (resultvar) \
+ : "i" (name) ASMFMT_##nr(args) : "memory", "cc" \
+ ); \
+ (int) resultvar; \
+})
+
-#if defined __SUPPORT_LD_DEBUG__ && defined __DOMULTI__
-#error LD debugging and DOMULTI are incompatible
-#endif
+#if 1 /* defined __PIC__ || defined __pic__ */
+/* This code avoids pushing/popping ebx as much as possible.
+ * I think the main reason was that older GCCs had problems
+ * with proper saving/restoring of ebx if "b" constraint was used,
+ * which was breaking -fPIC code really badly.
+ * At least gcc 4.2.x seems to not need these tricks anymore,
+ * but this code is still useful because it often avoids
+ * using stack for saving ebx.
+ * Keeping it unconditionally enabled for now.
+ */
+
+/* We need some help from the assembler to generate optimal code.
+ * We define some macros here which later will be used. */
+
+__asm__ (
#ifdef __DOMULTI__
-__asm__ (".L__X'%ebx = 1\n\t"
- ".L__X'%ecx = 2\n\t"
- ".L__X'%edx = 2\n\t"
- ".L__X'%eax = 3\n\t"
- ".L__X'%esi = 3\n\t"
- ".L__X'%edi = 3\n\t"
- ".L__X'%ebp = 3\n\t"
- ".L__X'%esp = 3\n\t"
- ".ifndef _BITS_SYSCALLS_ASM\n\t"
- ".set _BITS_SYSCALLS_ASM,1\n\t"
- ".macro bpushl name reg\n\t"
- ".if 1 - \\name\n\t"
- ".if 2 - \\name\n\t"
- "pushl %ebx\n\t"
- ".else\n\t"
- "xchgl \\reg, %ebx\n\t"
- ".endif\n\t"
- ".endif\n\t"
- ".endm\n\t"
- ".macro bpopl name reg\n\t"
- ".if 1 - \\name\n\t"
- ".if 2 - \\name\n\t"
- "popl %ebx\n\t"
- ".else\n\t"
- "xchgl \\reg, %ebx\n\t"
- ".endif\n\t"
- ".endif\n\t"
- ".endm\n\t"
- ".macro bmovl name reg\n\t"
- ".if 1 - \\name\n\t"
- ".if 2 - \\name\n\t"
- "movl \\reg, %ebx\n\t"
- ".endif\n\t"
- ".endif\n\t"
- ".endm\n\t"
- ".endif\n\t");
-#else
-__asm__ (".L__X'%ebx = 1\n\t"
- ".L__X'%ecx = 2\n\t"
- ".L__X'%edx = 2\n\t"
- ".L__X'%eax = 3\n\t"
- ".L__X'%esi = 3\n\t"
- ".L__X'%edi = 3\n\t"
- ".L__X'%ebp = 3\n\t"
- ".L__X'%esp = 3\n\t"
- ".macro bpushl name reg\n\t"
- ".if 1 - \\name\n\t"
- ".if 2 - \\name\n\t"
- "pushl %ebx\n\t"
- ".else\n\t"
- "xchgl \\reg, %ebx\n\t"
- ".endif\n\t"
- ".endif\n\t"
- ".endm\n\t"
- ".macro bpopl name reg\n\t"
- ".if 1 - \\name\n\t"
- ".if 2 - \\name\n\t"
- "popl %ebx\n\t"
- ".else\n\t"
- "xchgl \\reg, %ebx\n\t"
- ".endif\n\t"
- ".endif\n\t"
- ".endm\n\t"
- ".macro bmovl name reg\n\t"
- ".if 1 - \\name\n\t"
- ".if 2 - \\name\n\t"
- "movl \\reg, %ebx\n\t"
- ".endif\n\t"
- ".endif\n\t"
- ".endm\n\t");
+ /* Protect against asm macro redefinition (happens in __DOMULTI__ mode).
+ * Unfortunately, it ends up visible in .o files. */
+ ".ifndef _BITS_SYSCALLS_ASM\n\t"
+ ".set _BITS_SYSCALLS_ASM,1\n\t"
#endif
+ ".L__X'%ebx = 1\n\t"
+ ".L__X'%ecx = 2\n\t"
+ ".L__X'%edx = 2\n\t"
+ ".L__X'%eax = 3\n\t"
+ ".L__X'%esi = 3\n\t"
+ ".L__X'%edi = 3\n\t"
+ ".L__X'%ebp = 3\n\t"
+ ".L__X'%esp = 3\n\t"
-#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
- ({ \
- register unsigned int resultvar; \
- __asm__ __volatile__ ( \
- LOADARGS_##nr \
- "movl %1, %%eax\n\t" \
- "int $0x80\n\t" \
- RESTOREARGS_##nr \
- : "=a" (resultvar) \
- : "g" (name) ASMFMT_##nr(args) : "memory", "cc"); \
- (int) resultvar; })
+ /* Loading param #1 (ebx) is done by loading it into
+ * another register, and then performing bpushl+bmovl,
+ * since we must preserve ebx */
+
+ ".macro bpushl name reg\n\t"
+ ".if 1 - \\name\n\t" /* if reg!=ebx... */
+ ".if 2 - \\name\n\t" /* if reg can't be clobbered... */
+ "pushl %ebx\n\t" /* save ebx on stack */
+ ".else\n\t"
+ "xchgl \\reg, %ebx\n\t" /* else save ebx in reg, and load reg to ebx */
+ ".endif\n\t"
+ ".endif\n\t"
+ ".endm\n\t"
+
+ ".macro bmovl name reg\n\t"
+ ".if 1 - \\name\n\t"
+ ".if 2 - \\name\n\t" /* if reg can't be clobbered... */
+ "movl \\reg, %ebx\n\t" /* load reg to ebx */
+ ".endif\n\t"
+ ".endif\n\t"
+ ".endm\n\t"
+
+ ".macro bpopl name reg\n\t"
+ ".if 1 - \\name\n\t"
+ ".if 2 - \\name\n\t" /* if reg can't be clobbered... */
+ "popl %ebx\n\t" /* restore ebx from stack */
+ ".else\n\t"
+ "xchgl \\reg, %ebx\n\t" /* else restore ebx from reg */
+ ".endif\n\t"
+ ".endif\n\t"
+ ".endm\n\t"
+
+#ifdef __DOMULTI__
+ ".endif\n\t" /* _BITS_SYSCALLS_ASM */
+#endif
+);
#define LOADARGS_0
-#define LOADARGS_1 \
- "bpushl .L__X'%k2, %k2\n\t" \
- "bmovl .L__X'%k2, %k2\n\t"
-#define LOADARGS_2 LOADARGS_1
-#define LOADARGS_3 LOADARGS_1
-#define LOADARGS_4 LOADARGS_1
-#define LOADARGS_5 LOADARGS_1
-#define LOADARGS_6 LOADARGS_1 "push %%ebp ; movl %7, %%ebp\n\t"
+#define LOADARGS_1 "bpushl .L__X'%k2, %k2\n\t" "bmovl .L__X'%k2, %k2\n\t"
+#define LOADARGS_2 LOADARGS_1
+#define LOADARGS_3 LOADARGS_1
+#define LOADARGS_4 LOADARGS_1
+#define LOADARGS_5 LOADARGS_1
+#define LOADARGS_6 LOADARGS_1 "push %%ebp\n\t" "movl %7, %%ebp\n\t"
#define RESTOREARGS_0
-#define RESTOREARGS_1 \
- "bpopl .L__X'%k2, %k2\n\t"
-#define RESTOREARGS_2 RESTOREARGS_1
-#define RESTOREARGS_3 RESTOREARGS_1
-#define RESTOREARGS_4 RESTOREARGS_1
-#define RESTOREARGS_5 RESTOREARGS_1
-#define RESTOREARGS_6 "pop %%ebp\n\t" RESTOREARGS_1
+#define RESTOREARGS_1 "bpopl .L__X'%k2, %k2\n\t"
+#define RESTOREARGS_2 RESTOREARGS_1
+#define RESTOREARGS_3 RESTOREARGS_1
+#define RESTOREARGS_4 RESTOREARGS_1
+#define RESTOREARGS_5 RESTOREARGS_1
+#define RESTOREARGS_6 "pop %%ebp\n\t" RESTOREARGS_1
#define ASMFMT_0()
+/* "acdSD" constraint would work too, but "SD" would use esi/edi and cause
+ * them to be pushed/popped by compiler, "a" would use eax and cause ebx
+ * to be saved/restored on stack, not in register. Narrowing choice down
+ * to "ecx or edx" results in smaller and faster code: */
#define ASMFMT_1(arg1) \
- , "acdSD" (arg1)
+ , "cd" (arg1)
+/* Can use "adSD" constraint here: */
#define ASMFMT_2(arg1, arg2) \
- , "adSD" (arg1), "c" (arg2)
+ , "d" (arg1), "c" (arg2)
+/* Can use "aSD" constraint here: */
#define ASMFMT_3(arg1, arg2, arg3) \
- , "aSD" (arg1), "c" (arg2), "d" (arg3)
+ , "a" (arg1), "c" (arg2), "d" (arg3)
+/* Can use "aD" constraint here: */
#define ASMFMT_4(arg1, arg2, arg3, arg4) \
- , "aD" (arg1), "c" (arg2), "d" (arg3), "S" (arg4)
+ , "a" (arg1), "c" (arg2), "d" (arg3), "S" (arg4)
#define ASMFMT_5(arg1, arg2, arg3, arg4, arg5) \
, "a" (arg1), "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5)
#define ASMFMT_6(arg1, arg2, arg3, arg4, arg5, arg6) \
, "a" (arg1), "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5), "m" (arg6)
+#else /* !PIC */
+
+/* Simpler code which just uses "b" constraint to load ebx.
+ * Seems to work with gc 4.2.x, and generates slightly smaller,
+ * but slightly slower code. Example (time syscall):
+ *
+ * - 8b 4c 24 04 mov 0x4(%esp),%ecx
+ * - 87 cb xchg %ecx,%ebx
+ * + 53 push %ebx
+ * + 8b 5c 24 08 mov 0x8(%esp),%ebx
+ * b8 0d 00 00 00 mov $0xd,%eax
+ * cd 80 int $0x80
+ * - 87 cb xchg %ecx,%ebx
+ * + 5b pop %ebx
+ * c3 ret
+ *
+ * 2 bytes smaller, but uses stack via "push/pop ebx"
+ */
+
+#define LOADARGS_0
+#define LOADARGS_1
+#define LOADARGS_2
+#define LOADARGS_3
+#define LOADARGS_4
+#define LOADARGS_5
+#define LOADARGS_6 "push %%ebp\n\t" "movl %7, %%ebp\n\t"
+
+#define RESTOREARGS_0
+#define RESTOREARGS_1
+#define RESTOREARGS_2
+#define RESTOREARGS_3
+#define RESTOREARGS_4
+#define RESTOREARGS_5
+#define RESTOREARGS_6 "pop %%ebp\n\t"
+
+#define ASMFMT_0()
+#define ASMFMT_1(arg1) \
+ , "b" (arg1)
+#define ASMFMT_2(arg1, arg2) \
+ , "b" (arg1), "c" (arg2)
+#define ASMFMT_3(arg1, arg2, arg3) \
+ , "b" (arg1), "c" (arg2), "d" (arg3)
+#define ASMFMT_4(arg1, arg2, arg3, arg4) \
+ , "b" (arg1), "c" (arg2), "d" (arg3), "S" (arg4)
+#define ASMFMT_5(arg1, arg2, arg3, arg4, arg5) \
+ , "b" (arg1), "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5)
+#define ASMFMT_6(arg1, arg2, arg3, arg4, arg5, arg6) \
+ , "b" (arg1), "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5), "m" (arg6)
+
+#endif /* !PIC */
+
#endif /* __ASSEMBLER__ */
#endif /* _BITS_SYSCALLS_H */
diff --git a/libc/unistd/confstr.c b/libc/unistd/confstr.c
index 16b57bee9..957ee4d27 100644
--- a/libc/unistd/confstr.c
+++ b/libc/unistd/confstr.c
@@ -42,6 +42,24 @@ size_t confstr (int name, char *buf, size_t len)
string_len = sizeof (cs_path);
}
break;
+#ifdef __UCLIBC_HAS_THREADS__
+ case _CS_GNU_LIBPTHREAD_VERSION:
+# if defined __LINUXTHREADS_OLD__
+ string = "linuxthreads-0.01";
+ string_len = sizeof("linuxthreads-x.xx");
+# elif defined __LINUXTHREADS_NEW__
+ string = "linuxthreads-0.10";
+ string_len = sizeof("linuxthreads-x.xx");
+# elif defined __UCLIBC_HAS_THREADS_NATIVE__
+# define __NPTL_VERSION ("NPTL " \
+ #__UCLIBC_MAJOR__ "." \
+ #__UCLIBC_MINOR__ "." \
+ #__UCLIBC_SUBLEVEL__)
+ string = __NPTL_VERSION;
+ string_len = sizeof(__NPTL_VERSION);
+# endif
+ break;
+#endif
default:
__set_errno (EINVAL);
return 0;