[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v4 36/53] semihosting: Split out semihost_sys_rename
From: |
Richard Henderson |
Subject: |
[PATCH v4 36/53] semihosting: Split out semihost_sys_rename |
Date: |
Tue, 7 Jun 2022 13:45:40 -0700 |
Split out the non-ARM specific portions of SYS_RENAME to a
reusable function.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
include/semihosting/syscalls.h | 4 +++
semihosting/arm-compat-semi.c | 21 +------------
semihosting/syscalls.c | 57 ++++++++++++++++++++++++++++++++++
3 files changed, 62 insertions(+), 20 deletions(-)
diff --git a/include/semihosting/syscalls.h b/include/semihosting/syscalls.h
index 748a4b5e47..21430aa0ef 100644
--- a/include/semihosting/syscalls.h
+++ b/include/semihosting/syscalls.h
@@ -52,4 +52,8 @@ void semihost_sys_flen(CPUState *cs, gdb_syscall_complete_cb
fstat_cb,
void semihost_sys_remove(CPUState *cs, gdb_syscall_complete_cb complete,
target_ulong fname, target_ulong 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);
+
#endif /* SEMIHOSTING_SYSCALLS_H */
diff --git a/semihosting/arm-compat-semi.c b/semihosting/arm-compat-semi.c
index 6c9d50176a..da5c80b3d5 100644
--- a/semihosting/arm-compat-semi.c
+++ b/semihosting/arm-compat-semi.c
@@ -491,26 +491,7 @@ void do_common_semihosting(CPUState *cs)
GET_ARG(1);
GET_ARG(2);
GET_ARG(3);
- if (use_gdb_syscalls()) {
- gdb_do_syscall(common_semi_cb, "rename,%s,%s",
- arg0, (int)arg1 + 1, arg2, (int)arg3 + 1);
- } else {
- char *s2;
-
- s = lock_user_string(arg0);
- if (!s) {
- goto do_fault;
- }
- s2 = lock_user_string(arg2);
- if (!s2) {
- unlock_user(s, arg0, 0);
- goto do_fault;
- }
- ret = rename(s, s2);
- unlock_user(s2, arg2, 0);
- unlock_user(s, arg0, 0);
- common_semi_cb(cs, ret, ret ? errno : 0);
- }
+ semihost_sys_rename(cs, common_semi_cb, arg0, arg1 + 1, arg2, arg3 +
1);
break;
case TARGET_SYS_CLOCK:
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);
+ }
+}
--
2.34.1
- Re: [PATCH v4 29/53] semihosting: Split out semihost_sys_read, (continued)
- [PATCH v4 32/53] semihosting: Split out semihost_sys_lseek, Richard Henderson, 2022/06/07
- [PATCH v4 30/53] semihosting: Split out semihost_sys_write, Richard Henderson, 2022/06/07
- [PATCH v4 33/53] semihosting: Split out semihost_sys_isatty, Richard Henderson, 2022/06/07
- [PATCH v4 34/53] semihosting: Split out semihost_sys_flen, Richard Henderson, 2022/06/07
- [PATCH v4 36/53] semihosting: Split out semihost_sys_rename,
Richard Henderson <=
- [PATCH v4 39/53] semihosting: Create semihost_sys_gettimeofday, Richard Henderson, 2022/06/07
- [PATCH v4 41/53] semihosting: Fix docs comment for qemu_semihosting_console_inc, Richard Henderson, 2022/06/07
- [PATCH v4 45/53] semihosting: Create qemu_semihosting_console_write, Richard Henderson, 2022/06/07
- [PATCH v4 42/53] semihosting: Pass CPUState to qemu_semihosting_console_inc, Richard Henderson, 2022/06/07
- [PATCH v4 48/53] semihosting: Use console_in_gf for SYS_READC, Richard Henderson, 2022/06/07