semihosting: Split out semihost_sys_rename

Split out the non-ARM specific portions of SYS_RENAME to a
reusable function.

Reviewed-by: Luc Michel <lmichel@kalray.eu>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 57 insertions, 0 deletions

diff --git a/semihosting/syscalls.c b/semihosting/syscalls.c
index 5ec4e8f827..223916b110 100644
--- a/semihosting/syscalls.c
+++ b/semihosting/syscalls.c
@@ -145,6 +145,26 @@ static void gdb_remove(CPUState *cs, gdb_syscall_complete_cb complete,
     gdb_do_syscall(complete, "unlink,%s", fname, len);
 }
 
+static void gdb_rename(CPUState *cs, gdb_syscall_complete_cb complete,
+                       target_ulong oname, target_ulong oname_len,
+                       target_ulong nname, target_ulong nname_len)
+{
+    int olen, nlen;
+
+    olen = validate_strlen(cs, oname, oname_len);
+    if (olen < 0) {
+        complete(cs, -1, -olen);
+        return;
+    }
+    nlen = validate_strlen(cs, nname, nname_len);
+    if (nlen < 0) {
+        complete(cs, -1, -nlen);
+        return;
+    }
+
+    gdb_do_syscall(complete, "rename,%s,%s", oname, olen, nname, nlen);
+}
+
 /*
  * Host semihosting syscall implementations.
  */
@@ -307,6 +327,32 @@ static void host_remove(CPUState *cs, gdb_syscall_complete_cb complete,
     unlock_user(p, fname, 0);
 }
 
+static void host_rename(CPUState *cs, gdb_syscall_complete_cb complete,
+                        target_ulong oname, target_ulong oname_len,
+                        target_ulong nname, target_ulong nname_len)
+{
+    CPUArchState *env G_GNUC_UNUSED = cs->env_ptr;
+    char *ostr, *nstr;
+    int ret;
+
+    ret = validate_lock_user_string(&ostr, cs, oname, oname_len);
+    if (ret < 0) {
+        complete(cs, -1, -ret);
+        return;
+    }
+    ret = validate_lock_user_string(&nstr, cs, nname, nname_len);
+    if (ret < 0) {
+        unlock_user(ostr, oname, 0);
+        complete(cs, -1, -ret);
+        return;
+    }
+
+    ret = rename(ostr, nstr);
+    complete(cs, ret, ret ? errno : 0);
+    unlock_user(ostr, oname, 0);
+    unlock_user(nstr, nname, 0);
+}
+
 /*
  * Static file semihosting syscall implementations.
  */
@@ -562,3 +608,14 @@ void semihost_sys_remove(CPUState *cs, gdb_syscall_complete_cb complete,
         host_remove(cs, complete, fname, fname_len);
     }
 }
+
+void semihost_sys_rename(CPUState *cs, gdb_syscall_complete_cb complete,
+                         target_ulong oname, target_ulong oname_len,
+                         target_ulong nname, target_ulong nname_len)
+{
+    if (use_gdb_syscalls()) {
+        gdb_rename(cs, complete, oname, oname_len, nname, nname_len);
+    } else {
+        host_rename(cs, complete, oname, oname_len, nname, nname_len);
+    }
+}