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[PULL 26/51] bsd-user: Implement fork(2) and vfork(2) system calls.
From: |
Warner Losh |
Subject: |
[PULL 26/51] bsd-user: Implement fork(2) and vfork(2) system calls. |
Date: |
Tue, 3 Oct 2023 17:31:50 -0600 |
From: Stacey Son <sson@FreeBSD.org>
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>
---
bsd-user/freebsd/os-proc.h | 34 ++++++++++++++++++++++++++++++++++
bsd-user/freebsd/os-syscall.c | 8 ++++++++
2 files changed, 42 insertions(+)
diff --git a/bsd-user/freebsd/os-proc.h b/bsd-user/freebsd/os-proc.h
index 42bdd61904b..7b2e6a9f796 100644
--- a/bsd-user/freebsd/os-proc.h
+++ b/bsd-user/freebsd/os-proc.h
@@ -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 */
diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c
index 99af0f6b156..cb9425c9bab 100644
--- a/bsd-user/freebsd/os-syscall.c
+++ b/bsd-user/freebsd/os-syscall.c
@@ -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;
--
2.41.0
- [PULL 14/51] bsd-user: Implement getrlimit(2) and setrlimit(2), (continued)
- [PULL 14/51] bsd-user: Implement getrlimit(2) and setrlimit(2), Warner Losh, 2023/10/03
- [PULL 15/51] bsd-user: Implement several get/set system calls:, Warner Losh, 2023/10/03
- [PULL 17/51] bsd-user: Add stubs for profil(2), ktrace(2), utrace(2) and ptrace(2)., Warner Losh, 2023/10/03
- [PULL 18/51] bsd-user: Implement getpriority(2) and setpriority(2)., Warner Losh, 2023/10/03
- [PULL 16/51] bsd-user: Implement get/set[resuid/resgid/sid] and issetugid., Warner Losh, 2023/10/03
- [PULL 20/51] bsd-user: Implement freebsd_exec_common, used in implementing execve/fexecve., Warner Losh, 2023/10/03
- [PULL 19/51] bsd-user: Implement get_filename_from_fd., Warner Losh, 2023/10/03
- [PULL 23/51] bsd-user: Implement wait4(2) and wait6(2) system calls., Warner Losh, 2023/10/03
- [PULL 25/51] bsd-user: Implement pdgetpid(2) and the undocumented setugid., Warner Losh, 2023/10/03
- [PULL 24/51] bsd-user: Implement setloginclass(2) and getloginclass(2) system calls., Warner Losh, 2023/10/03
- [PULL 26/51] bsd-user: Implement fork(2) and vfork(2) system calls.,
Warner Losh <=
- [PULL 27/51] bsd-user: Implement rfork(2) system call., Warner Losh, 2023/10/03
- [PULL 29/51] bsd-user: Implement struct target_ipc_perm, Warner Losh, 2023/10/03
- [PULL 22/51] bsd-user: Implement execve(2) and fexecve(2) system calls., Warner Losh, 2023/10/03
- [PULL 28/51] bsd-user: Implement pdfork(2) system call., Warner Losh, 2023/10/03
- [PULL 30/51] bsd-user: Implement struct target_shmid_ds, Warner Losh, 2023/10/03
- [PULL 31/51] bsd-user: Declarations for ipc_perm and shmid_ds conversion functions, Warner Losh, 2023/10/03
- [PULL 33/51] bsd-user: Implement shm_open2(2) system call, Warner Losh, 2023/10/03
- [PULL 21/51] bsd-user: Implement procctl(2) along with necessary conversion functions., Warner Losh, 2023/10/03
- [PULL 36/51] bsd-user: Implement target_set_brk function in bsd-mem.c instead of os-syscall.c, Warner Losh, 2023/10/03
- [PULL 34/51] bsd-user: Implement shm_rename(2) system call, Warner Losh, 2023/10/03