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Name the implementation of brk and sbrk sys_break().

Browse Source 
The break() system call was renamed (several times) starting in v3
AT&T UNIX when C was invented and break was a language keyword. The
last vestage of a need for it to be called something else (eg obreak)
was removed in r225617 which consistantly prefixed all syscall
implementations.

Reviewed by:	emaste, kib (older version)
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D15638
This commit is contained in:
Brooks Davis 2018-06-14 21:27:25 +00:00
parent 8d86bd564f
commit 9da5364ed9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=335177
6 changed files with 9 additions and 14 deletions
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3
sys/compat/freebsd32/syscalls.master
View File

@ -87,8 +87,7 @@
int mode, int dev); }
15 AUE_CHMOD NOPROTO { int chmod(char *path, int mode); }
16 AUE_CHOWN NOPROTO { int chown(char *path, int uid, int gid); }
17 AUE_NULL NOPROTO { caddr_t obreak(char *nsize); } break \
obreak_args int
17 AUE_NULL NOPROTO { caddr_t break(char *nsize); }
18 AUE_GETFSSTAT COMPAT4 { int freebsd32_getfsstat( \
struct statfs32 *buf, long bufsize, \
int mode); }

4
sys/compat/linux/linux_misc.c
View File

@ -231,7 +231,7 @@ linux_brk(struct thread *td, struct linux_brk_args *args)
{
struct vmspace *vm = td->td_proc->p_vmspace;
vm_offset_t new, old;
struct obreak_args /* {
struct break_args /* {
char * nsize;
} */ tmp;
@ -242,7 +242,7 @@ linux_brk(struct thread *td, struct linux_brk_args *args)
old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
new = (vm_offset_t)args->dsend;
tmp.nsize = (char *)new;
if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp))
if (((caddr_t)new > vm->vm_daddr) && !sys_break(td, &tmp))
td->td_retval[0] = (long)new;
else
td->td_retval[0] = (long)old;

2
sys/i386/ibcs2/syscalls.master
View File

@ -57,7 +57,7 @@
15 AUE_CHMOD STD { int ibcs2_chmod(char *path, int mode); }
16 AUE_CHOWN STD { int ibcs2_chown(char *path, int uid, \
int gid); }
17 AUE_NULL NOPROTO { int obreak(caddr_t nsize); }
17 AUE_NULL NOPROTO { caddr_t break(caddr_t nsize); }
18 AUE_STAT STD { int ibcs2_stat(char* path, \
struct ibcs2_stat *st); }
19 AUE_LSEEK STD { long ibcs2_lseek(int fd, long offset, \

2
sys/kern/capabilities.conf
View File

@ -438,7 +438,7 @@ oaio_write
##
## Allow simple VM operations on the current process.
##
obreak
break
##
## Allow AIO operations by file descriptor, subject to capability rights.

3
sys/kern/syscalls.master
View File

@ -118,8 +118,7 @@
15 AUE_CHMOD STD { int chmod(_In_z_ char *path, int mode); }
16 AUE_CHOWN STD { int chown(_In_z_ char *path, \
int uid, int gid); }
17 AUE_NULL STD { caddr_t obreak(_In_ char *nsize); } break \
obreak_args int
17 AUE_NULL STD { caddr_t break(_In_ char *nsize); }
18 AUE_GETFSSTAT COMPAT4 { int getfsstat( \
_Out_writes_bytes_opt_(bufsize) \
struct ostatfs *buf, \

9
sys/vm/vm_unix.c
View File

@ -61,12 +61,12 @@ __FBSDID("$FreeBSD$");
#include <vm/vm_map.h>
#ifndef _SYS_SYSPROTO_H_
struct obreak_args {
struct break_args {
char *nsize;
};
#endif
int
sys_obreak(struct thread *td, struct obreak_args *uap)
sys_break(struct thread *td, struct break_args *uap)
{
#if !defined(__aarch64__) && !defined(__riscv__)
struct vmspace *vm = td->td_proc->p_vmspace;
@ -196,11 +196,8 @@ sys_obreak(struct thread *td, struct obreak_args *uap)
*
* XXX If the pages cannot be wired, no error is returned.
*/
if ((map->flags & MAP_WIREFUTURE) == MAP_WIREFUTURE) {
if (bootverbose)
printf("obreak: MAP_WIREFUTURE set\n");
if ((map->flags & MAP_WIREFUTURE) == MAP_WIREFUTURE)
do_map_wirefuture = TRUE;
}
} else if (new < old) {
rv = vm_map_delete(map, new, old);
if (rv != KERN_SUCCESS) {