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bsd-user: Implement pdfork(2) system call.

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Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Karim Taha <kariem.taha2.7@gmail.com>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Message-Id: <20230925182425.3163-29-kariem.taha2.7@gmail.com>
This commit is contained in:
Stacey Son 2023-09-25 21:24:25 +03:00 • committed by Warner Losh
parent 510eecbc86
commit 6756ae283a
2 changed files with 36 additions and 0 deletions
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32
bsd-user/freebsd/os-proc.h
View file

@ -258,4 +258,36 @@ static inline abi_long do_freebsd_rfork(void *cpu_env, abi_long flags)
}
/* pdfork(2) */
static inline abi_long do_freebsd_pdfork(void *cpu_env, abi_ulong target_fdp,
abi_long flags)
{
abi_long ret;
abi_ulong child_flag;
int fd;
fork_start();
ret = pdfork(&fd, flags);
if (ret == 0) {
/* child */
child_flag = 1;
target_cpu_clone_regs(cpu_env, 0);
} else {
/* parent */
child_flag = 0;
if (put_user_s32(fd, target_fdp)) {
return -TARGET_EFAULT;
}
}
/*
* 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;
}
#endif /* BSD_USER_FREEBSD_OS_PROC_H */