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[PULL,38/51] bsd-user: Implement shmid_ds conversion between host and target.

Message ID 20231003233215.95557-39-imp@bsdimp.com
State New
Headers show
Series [PULL,01/51] bsd-user: define TARGET_RFSPAWN for rfork to use vfork(2) semantics, and fix RLIM_INFINITY | expand

Commit Message

Warner Losh Oct. 3, 2023, 11:32 p.m. UTC 
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>
Message-Id: <20230925182709.4834-11-kariem.taha2.7@gmail.com>
---
 bsd-user/bsd-mem.c | 47 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
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Patch

diff --git a/bsd-user/bsd-mem.c b/bsd-user/bsd-mem.c
index 46cda8eb5ce..2ab1334b700 100644
--- a/bsd-user/bsd-mem.c
+++ b/bsd-user/bsd-mem.c
@@ -43,6 +43,30 @@  void target_to_host_ipc_perm__locked(struct ipc_perm *host_ip,
     __get_user(host_ip->key,  &target_ip->key);
 }
 
+abi_long target_to_host_shmid_ds(struct shmid_ds *host_sd,
+                                 abi_ulong target_addr)
+{
+    struct target_shmid_ds *target_sd;
+
+    if (!lock_user_struct(VERIFY_READ, target_sd, target_addr, 1)) {
+        return -TARGET_EFAULT;
+    }
+
+    target_to_host_ipc_perm__locked(&(host_sd->shm_perm),
+                                    &(target_sd->shm_perm));
+
+    __get_user(host_sd->shm_segsz,  &target_sd->shm_segsz);
+    __get_user(host_sd->shm_lpid,   &target_sd->shm_lpid);
+    __get_user(host_sd->shm_cpid,   &target_sd->shm_cpid);
+    __get_user(host_sd->shm_nattch, &target_sd->shm_nattch);
+    __get_user(host_sd->shm_atime,  &target_sd->shm_atime);
+    __get_user(host_sd->shm_dtime,  &target_sd->shm_dtime);
+    __get_user(host_sd->shm_ctime,  &target_sd->shm_ctime);
+    unlock_user_struct(target_sd, target_addr, 0);
+
+    return 0;
+}
+
 void host_to_target_ipc_perm__locked(struct target_ipc_perm *target_ip,
                                      struct ipc_perm *host_ip)
 {
@@ -55,3 +79,26 @@  void host_to_target_ipc_perm__locked(struct target_ipc_perm *target_ip,
     __put_user(host_ip->key,  &target_ip->key);
 }
 
+abi_long host_to_target_shmid_ds(abi_ulong target_addr,
+                                 struct shmid_ds *host_sd)
+{
+    struct target_shmid_ds *target_sd;
+
+    if (!lock_user_struct(VERIFY_WRITE, target_sd, target_addr, 0)) {
+        return -TARGET_EFAULT;
+    }
+
+    host_to_target_ipc_perm__locked(&(target_sd->shm_perm),
+                                    &(host_sd->shm_perm));
+
+    __put_user(host_sd->shm_segsz,  &target_sd->shm_segsz);
+    __put_user(host_sd->shm_lpid,   &target_sd->shm_lpid);
+    __put_user(host_sd->shm_cpid,   &target_sd->shm_cpid);
+    __put_user(host_sd->shm_nattch, &target_sd->shm_nattch);
+    __put_user(host_sd->shm_atime,  &target_sd->shm_atime);
+    __put_user(host_sd->shm_dtime,  &target_sd->shm_dtime);
+    __put_user(host_sd->shm_ctime,  &target_sd->shm_ctime);
+    unlock_user_struct(target_sd, target_addr, 1);
+
+    return 0;
+}