ad5527663e
* Makefile.am: Move cmath stuff into libc/sys/linux.
* Makefile.in: Regenerated.
* configure.host: Default -DMB_CAPABLE for x86-linux.
* libc/include/reent.h: Define _sbrk to take signed int argument.
* libc/include/sys/unistd.h: Ditto for _sbrk_r and sbrk.
* libc/locale/locale.c[MB_CAPABLE]: Add LC_MESSAGES support and
make locale name checking more efficient. Also allow "C-ISO-8859-1"
locale for LC_CTYPE and LC_MESSAGES.
* libc/reent/sbrkr.c: Change prototype to take ptrdiff_t.
* libc/sys/linux/brk.c: Change sbrk prototype.
* libc/sys/linux/include/time.h: Remove Cygwin stuff and
include <sys/features.h>.
(CLOCK_THREAD_CPUTIME): Renamed to CLOCK_THREAD_CPUTIME_ID.
(CLOCK_PROCESS_CPUTIME): Renamed to CLOCK_PROCESS_CPUTIME_ID.
* libc/sys/linux/sys/cdefs.h: Replace with glibc sys/cdefs.h
with a few local additions.
* libc/sys/linux/sys/features.h: New file.
* libc/sys/linux/sys/unistd.h: Change _sbrk_r and sbrk prototypes
to take signed argument.
* libc/syscalls/syssbrk.c: Change sbrk, _sbrk_r, and _sbrk
prototypes to take signed size argument.
42 lines
851 B
C
42 lines
851 B
C
/* libc/sys/linux/brk.c - Change data segment size */
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/* Written 2000 by Werner Almesberger */
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#include <stddef.h> /* for NULL */
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#include <sys/types.h>
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#include <sys/unistd.h>
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#include <machine/syscall.h>
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static char *curr_brk = NULL;
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#define __NR___brk __NR_brk /* Linux brk ain't no brk(2) */
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static _syscall1(void *,__brk,void *,end_data_segment)
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int brk(void *end_data_segment)
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{
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char *new_brk;
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new_brk = __brk(end_data_segment);
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if (new_brk != end_data_segment) return -1;
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curr_brk = new_brk;
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return 0;
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}
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void *sbrk(ptrdiff_t increment) /* SHOULD be ptrdiff_t */
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{
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char *old_brk,*new_brk;
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if (!curr_brk) curr_brk = __brk(NULL);
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new_brk = __brk(curr_brk+increment);
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if (new_brk != curr_brk+increment) return (void *) -1;
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old_brk = curr_brk;
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curr_brk = new_brk;
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return old_brk;
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}
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