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bsd-user: Implement fork(2) and vfork(2) system calls. 

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Karim Taha <kariem.taha2.7@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Message-Id: <20230925182425.3163-27-kariem.taha2.7@gmail.com>
master
Stacey Son 2023-09-25 21:24:23 +03:00 committed by Warner Losh
parent 0571e3f5e2
commit 831a5a7fcb
2 changed files with 42 additions and 0 deletions
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34
bsd-user/freebsd/os-proc.h
View File

@ -185,4 +185,38 @@ static inline abi_long do_freebsd___setugid(abi_long arg1)
return -TARGET_ENOSYS;
}
/* fork(2) */
static inline abi_long do_freebsd_fork(void *cpu_env)
{
abi_long ret;
abi_ulong child_flag;
fork_start();
ret = fork();
if (ret == 0) {
/* child */
child_flag = 1;
target_cpu_clone_regs(cpu_env, 0);
} else {
/* parent */
child_flag = 0;
}
/*
* The fork system call sets a child flag in the second return
* value: 0 for parent process, 1 for child process.
*/
set_second_rval(cpu_env, child_flag);
fork_end(child_flag);
return ret;
}
/* vfork(2) */
static inline abi_long do_freebsd_vfork(void *cpu_env)
{
return do_freebsd_fork(cpu_env);
}
#endif /* BSD_USER_FREEBSD_OS_PROC_H */

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

@ -226,6 +226,14 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
/*
* process system calls
*/
case TARGET_FREEBSD_NR_fork: /* fork(2) */
ret = do_freebsd_fork(cpu_env);
break;
case TARGET_FREEBSD_NR_vfork: /* vfork(2) */
ret = do_freebsd_vfork(cpu_env);
break;
case TARGET_FREEBSD_NR_execve: /* execve(2) */
ret = do_freebsd_execve(arg1, arg2, arg3);
break;