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bsd-user: Delete sbrk and sstk system calls.

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sbrk and sstk were an experimental system call introduced in 4.2BSD, but
with an blank implementation. They remained in subsequent 4BSD releases
doing nothing (with 4.3-Reno and later returning not supported). FreeBSD
1.x imported this. They were removed in 2023. Remove them from here
because no real, non-contrived program on FreeBSD ever had them.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
Signed-off-by: Warner Losh <imp@bsdimp.com>
This commit is contained in:
Warner Losh
2026-04-13 08:36:31 -06:00
parent 771ab9c4d8
commit 0683057447
3 changed files with 4 additions and 21 deletions
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13
bsd-user/bsd-mem.h
View File

@@ -428,17 +428,4 @@ static inline abi_long do_bsd_vadvise(void)
/* See sys_ovadvise() in vm_unix.c */
return -TARGET_EINVAL;
}
static inline abi_long do_bsd_sbrk(void)
{
/* see sys_sbrk() in vm_mmap.c */
return -TARGET_EOPNOTSUPP;
}
static inline abi_long do_bsd_sstk(void)
{
/* see sys_sstk() in vm_mmap.c */
return -TARGET_EOPNOTSUPP;
}
#endif /* BSD_USER_BSD_MEM_H */

8
bsd-user/freebsd/os-syscall.c
View File

@@ -918,14 +918,6 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
ret = do_bsd_vadvise();
break;
case TARGET_FREEBSD_NR_sbrk:
ret = do_bsd_sbrk();
break;
case TARGET_FREEBSD_NR_sstk:
ret = do_bsd_sstk();
break;
/*
* Misc
*/

4
bsd-user/freebsd/strace.list
View File

@@ -194,7 +194,9 @@
{ TARGET_FREEBSD_NR_rfork, "rfork", NULL, NULL, NULL },
{ TARGET_FREEBSD_NR_rmdir, "rmdir", NULL, NULL, NULL },
{ TARGET_FREEBSD_NR_rtprio_thread, "rtprio_thread", "%s(%d, %d, %p)", NULL, NULL },
#ifdef TARGET_FREEBSD_NR_sbrk
{ TARGET_FREEBSD_NR_sbrk, "sbrk", NULL, NULL, NULL },
#endif
{ TARGET_FREEBSD_NR_sched_get_priority_max, "sched_get_priority_max", NULL, NULL, NULL },
{ TARGET_FREEBSD_NR_sched_get_priority_min, "sched_get_priority_min", NULL, NULL, NULL },
{ TARGET_FREEBSD_NR_sched_yield, "sched_yield", NULL, NULL, NULL },
@@ -234,7 +236,9 @@
{ TARGET_FREEBSD_NR_sigsuspend, "sigsuspend", NULL, NULL, NULL },
{ TARGET_FREEBSD_NR_socket, "socket", "%s(%d,%d,%d)", NULL, NULL },
{ TARGET_FREEBSD_NR_socketpair, "socketpair", NULL, NULL, NULL },
#ifdef TARGET_FREEBSD_NR_sstk
{ TARGET_FREEBSD_NR_sstk, "sstk", NULL, NULL, NULL },
#endif
{ TARGET_FREEBSD_NR_freebsd11_stat, "freebsd11_stat", "%s(\"%s\",%p)", NULL, NULL },
{ TARGET_FREEBSD_NR_freebsd11_statfs, "freebsd11_statfs", "%s(\"%s\",%p)", NULL, NULL },
{ TARGET_FREEBSD_NR_symlink, "symlink", "%s(\"%s\",\"%s\")", NULL, NULL },