[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v2 22/74] semihosting: Split out semihost_sys_close
From: |
Richard Henderson |
Subject: |
[PATCH v2 22/74] semihosting: Split out semihost_sys_close |
Date: |
Tue, 3 May 2022 12:47:51 -0700 |
Split out the non-ARM specific portions of SYS_CLOSE to a
reusable function. This handles all GuestFD.
Note that gdb_do_syscall %x reads target_ulong, not int.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
include/semihosting/syscalls.h | 3 +++
semihosting/arm-compat-semi.c | 41 +----------------------------
semihosting/guestfd.c | 7 ++++-
semihosting/syscalls.c | 47 ++++++++++++++++++++++++++++++++++
4 files changed, 57 insertions(+), 41 deletions(-)
diff --git a/include/semihosting/syscalls.h b/include/semihosting/syscalls.h
index 991658bf79..00e718f11d 100644
--- a/include/semihosting/syscalls.h
+++ b/include/semihosting/syscalls.h
@@ -22,4 +22,7 @@ void semihost_sys_open(CPUState *cs, gdb_syscall_complete_cb
complete,
target_ulong fname, target_ulong fname_len,
int gdb_flags, int mode);
+void semihost_sys_close(CPUState *cs, gdb_syscall_complete_cb complete,
+ int fd);
+
#endif /* SEMIHOSTING_SYSCALLS_H */
diff --git a/semihosting/arm-compat-semi.c b/semihosting/arm-compat-semi.c
index 4a2f0c9202..8ebe3aad55 100644
--- a/semihosting/arm-compat-semi.c
+++ b/semihosting/arm-compat-semi.c
@@ -277,7 +277,6 @@ common_semi_flen_cb(CPUState *cs, target_ulong ret,
target_ulong err)
* do the work and return the required return value to the guest
* via common_semi_cb.
*/
-typedef void sys_closefn(CPUState *cs, GuestFD *gf);
typedef void sys_writefn(CPUState *cs, GuestFD *gf,
target_ulong buf, uint32_t len);
typedef void sys_readfn(CPUState *cs, GuestFD *gf,
@@ -286,23 +285,6 @@ typedef void sys_isattyfn(CPUState *cs, GuestFD *gf);
typedef void sys_seekfn(CPUState *cs, GuestFD *gf, target_ulong offset);
typedef void sys_flenfn(CPUState *cs, GuestFD *gf);
-static void host_closefn(CPUState *cs, GuestFD *gf)
-{
- int ret;
- /*
- * Only close the underlying host fd if it's one we opened on behalf
- * of the guest in SYS_OPEN.
- */
- if (gf->hostfd == STDIN_FILENO ||
- gf->hostfd == STDOUT_FILENO ||
- gf->hostfd == STDERR_FILENO) {
- ret = 0;
- } else {
- ret = close(gf->hostfd);
- }
- common_semi_cb(cs, ret, ret ? errno : 0);
-}
-
static void host_writefn(CPUState *cs, GuestFD *gf,
target_ulong buf, uint32_t len)
{
@@ -363,11 +345,6 @@ static void host_flenfn(CPUState *cs, GuestFD *gf)
}
}
-static void gdb_closefn(CPUState *cs, GuestFD *gf)
-{
- gdb_do_syscall(common_semi_cb, "close,%x", gf->hostfd);
-}
-
static void gdb_writefn(CPUState *cs, GuestFD *gf,
target_ulong buf, uint32_t len)
{
@@ -415,12 +392,6 @@ static const uint8_t featurefile_data[] = {
SH_EXT_EXIT_EXTENDED | SH_EXT_STDOUT_STDERR, /* Feature byte 0 */
};
-static void staticfile_closefn(CPUState *cs, GuestFD *gf)
-{
- /* Nothing to do */
- common_semi_cb(cs, 0, 0);
-}
-
static void staticfile_writefn(CPUState *cs, GuestFD *gf,
target_ulong buf, uint32_t len)
{
@@ -469,7 +440,6 @@ static void staticfile_flenfn(CPUState *cs, GuestFD *gf)
}
typedef struct GuestFDFunctions {
- sys_closefn *closefn;
sys_writefn *writefn;
sys_readfn *readfn;
sys_isattyfn *isattyfn;
@@ -479,7 +449,6 @@ typedef struct GuestFDFunctions {
static const GuestFDFunctions guestfd_fns[] = {
[GuestFDHost] = {
- .closefn = host_closefn,
.writefn = host_writefn,
.readfn = host_readfn,
.isattyfn = host_isattyfn,
@@ -487,7 +456,6 @@ static const GuestFDFunctions guestfd_fns[] = {
.flenfn = host_flenfn,
},
[GuestFDGDB] = {
- .closefn = gdb_closefn,
.writefn = gdb_writefn,
.readfn = gdb_readfn,
.isattyfn = gdb_isattyfn,
@@ -495,7 +463,6 @@ static const GuestFDFunctions guestfd_fns[] = {
.flenfn = gdb_flenfn,
},
[GuestFDStatic] = {
- .closefn = staticfile_closefn,
.writefn = staticfile_writefn,
.readfn = staticfile_readfn,
.isattyfn = staticfile_isattyfn,
@@ -586,13 +553,7 @@ void do_common_semihosting(CPUState *cs)
case TARGET_SYS_CLOSE:
GET_ARG(0);
-
- gf = get_guestfd(arg0);
- if (!gf) {
- goto do_badf;
- }
- guestfd_fns[gf->type].closefn(cs, gf);
- dealloc_guestfd(arg0);
+ semihost_sys_close(cs, common_semi_cb, arg0);
break;
case TARGET_SYS_WRITEC:
diff --git a/semihosting/guestfd.c b/semihosting/guestfd.c
index 7ac2e147a8..e3122ebba9 100644
--- a/semihosting/guestfd.c
+++ b/semihosting/guestfd.c
@@ -49,6 +49,11 @@ int alloc_guestfd(void)
return i;
}
+static void do_dealloc_guestfd(GuestFD *gf)
+{
+ gf->type = GuestFDUnused;
+}
+
/*
* Look up the guestfd in the data structure; return NULL
* for out of bounds, but don't check whether the slot is unused.
@@ -119,5 +124,5 @@ void dealloc_guestfd(int guestfd)
GuestFD *gf = do_get_guestfd(guestfd);
assert(gf);
- gf->type = GuestFDUnused;
+ do_dealloc_guestfd(gf);
}
diff --git a/semihosting/syscalls.c b/semihosting/syscalls.c
index a44d5cbae2..9c4b635317 100644
--- a/semihosting/syscalls.c
+++ b/semihosting/syscalls.c
@@ -124,6 +124,12 @@ static void gdb_open(CPUState *cs, gdb_syscall_complete_cb
complete,
fname, len, (target_ulong)gdb_flags, (target_ulong)mode);
}
+static void gdb_close(CPUState *cs, gdb_syscall_complete_cb complete,
+ GuestFD *gf)
+{
+ gdb_do_syscall(complete, "close,%x", (target_ulong)gf->hostfd);
+}
+
/*
* Host semihosting syscall implementations.
*/
@@ -170,6 +176,23 @@ static void host_open(CPUState *cs,
gdb_syscall_complete_cb complete,
unlock_user(p, fname, 0);
}
+static void host_close(CPUState *cs, gdb_syscall_complete_cb complete,
+ GuestFD *gf)
+{
+ /*
+ * Only close the underlying host fd if it's one we opened on behalf
+ * of the guest in SYS_OPEN.
+ */
+ if (gf->hostfd != STDIN_FILENO &&
+ gf->hostfd != STDOUT_FILENO &&
+ gf->hostfd != STDERR_FILENO &&
+ close(gf->hostfd) < 0) {
+ complete(cs, -1, errno_for_gdb());
+ } else {
+ complete(cs, 0, 0);
+ }
+}
+
/*
* Syscall entry points.
*/
@@ -184,3 +207,27 @@ void semihost_sys_open(CPUState *cs,
gdb_syscall_complete_cb complete,
host_open(cs, complete, fname, fname_len, gdb_flags, mode);
}
}
+
+void semihost_sys_close(CPUState *cs, gdb_syscall_complete_cb complete, int fd)
+{
+ GuestFD *gf = get_guestfd(fd);
+
+ if (!gf) {
+ complete(cs, -1, GDB_EBADF);
+ return;
+ }
+ switch (gf->type) {
+ case GuestFDGDB:
+ gdb_close(cs, complete, gf);
+ break;
+ case GuestFDHost:
+ host_close(cs, complete, gf);
+ break;
+ case GuestFDStatic:
+ complete(cs, 0, 0);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+ dealloc_guestfd(fd);
+}
--
2.34.1
- [PATCH v2 13/74] include/exec: Move gdb_stat and gdb_timeval to gdbstub.h, (continued)
- [PATCH v2 13/74] include/exec: Move gdb_stat and gdb_timeval to gdbstub.h, Richard Henderson, 2022/05/03
- [PATCH v2 10/74] semihosting: Adjust error checking in common_semi_cb, Richard Henderson, 2022/05/03
- [PATCH v2 12/74] include/exec: Move gdb open flags to gdbstub.h, Richard Henderson, 2022/05/03
- [PATCH v2 14/74] include/exec: Define errno values in gdbstub.h, Richard Henderson, 2022/05/03
- [PATCH v2 15/74] semihosting: Use struct gdb_stat in common_semi_flen_cb, Richard Henderson, 2022/05/03
- [PATCH v2 17/74] semihosting: Split common_semi_flen_buf per target, Richard Henderson, 2022/05/03
- [PATCH v2 16/74] semihosting: Split is_64bit_semihosting per target, Richard Henderson, 2022/05/03
- [PATCH v2 19/74] semihosting: Use env more often in do_common_semihosting, Richard Henderson, 2022/05/03
- [PATCH v2 22/74] semihosting: Split out semihost_sys_close,
Richard Henderson <=
- [PATCH v2 21/74] semihosting: Split out semihost_sys_open, Richard Henderson, 2022/05/03
- [PATCH v2 20/74] semihosting: Move GET_ARG/SET_ARG earlier in the file, Richard Henderson, 2022/05/03
- [PATCH v2 23/74] semihosting: Split out semihost_sys_read, Richard Henderson, 2022/05/03
- [PATCH v2 27/74] semihosting: Split out semihost_sys_isatty, Richard Henderson, 2022/05/03
- [PATCH v2 18/74] semihosting: Split out common_semi_has_synccache, Richard Henderson, 2022/05/03
- [PATCH v2 11/74] semihosting: Move common-semi.h to include/semihosting/, Richard Henderson, 2022/05/03
- [PATCH v2 26/74] semihosting: Split out semihost_sys_lseek, Richard Henderson, 2022/05/03
- [PATCH v2 31/74] semihosting: Split out semihost_sys_system, Richard Henderson, 2022/05/03
- [PATCH v2 24/74] semihosting: Split out semihost_sys_write, Richard Henderson, 2022/05/03