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authorPeter Maydell <peter.maydell@linaro.org>2019-09-16 15:15:37 +0100
committerPeter Maydell <peter.maydell@linaro.org>2019-10-15 18:09:03 +0100
commit52c8a163c165f6989238638c842895dbd767fec9 (patch)
tree64e1dc7e9ed09cec9b239eac77ed536b06f6e5be /target
parent263eb621de9dc5295c64879edf46dafe928c8b72 (diff)
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target/arm/arm-semi: Factor out implementation of SYS_WRITE
Factor out the implementation of SYS_WRITE via the new function tables. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20190916141544.17540-9-peter.maydell@linaro.org
Diffstat (limited to 'target')
-rw-r--r--target/arm/arm-semi.c51
1 files changed, 33 insertions, 18 deletions
diff --git a/target/arm/arm-semi.c b/target/arm/arm-semi.c
index e5f1e2a..c21cbb9 100644
--- a/target/arm/arm-semi.c
+++ b/target/arm/arm-semi.c
@@ -384,6 +384,8 @@ static target_ulong arm_gdb_syscall(ARMCPU *cpu, gdb_syscall_complete_cb cb,
* setting the guest errno if appropriate.
*/
typedef uint32_t sys_closefn(ARMCPU *cpu, GuestFD *gf);
+typedef uint32_t sys_writefn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len);
static uint32_t host_closefn(ARMCPU *cpu, GuestFD *gf)
{
@@ -392,21 +394,51 @@ static uint32_t host_closefn(ARMCPU *cpu, GuestFD *gf)
return set_swi_errno(env, close(gf->hostfd));
}
+static uint32_t host_writefn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len)
+{
+ uint32_t ret;
+ CPUARMState *env = &cpu->env;
+ char *s = lock_user(VERIFY_READ, buf, len, 1);
+ if (!s) {
+ /* Return bytes not written on error */
+ return len;
+ }
+ ret = set_swi_errno(env, write(gf->hostfd, s, len));
+ unlock_user(s, buf, 0);
+ if (ret == (uint32_t)-1) {
+ ret = 0;
+ }
+ /* Return bytes not written */
+ return len - ret;
+}
+
static uint32_t gdb_closefn(ARMCPU *cpu, GuestFD *gf)
{
return arm_gdb_syscall(cpu, arm_semi_cb, "close,%x", gf->hostfd);
}
+static uint32_t gdb_writefn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len)
+{
+ arm_semi_syscall_len = len;
+ return arm_gdb_syscall(cpu, arm_semi_cb, "write,%x,%x,%x",
+ gf->hostfd, buf, len);
+}
+
typedef struct GuestFDFunctions {
sys_closefn *closefn;
+ sys_writefn *writefn;
} GuestFDFunctions;
static const GuestFDFunctions guestfd_fns[] = {
[GuestFDHost] = {
.closefn = host_closefn,
+ .writefn = host_writefn,
},
[GuestFDGDB] = {
.closefn = gdb_closefn,
+ .writefn = gdb_writefn,
},
};
@@ -539,24 +571,7 @@ target_ulong do_arm_semihosting(CPUARMState *env)
return set_swi_errno(env, -1);
}
- if (use_gdb_syscalls()) {
- arm_semi_syscall_len = len;
- return arm_gdb_syscall(cpu, arm_semi_cb, "write,%x,%x,%x",
- gf->hostfd, arg1, len);
- } else {
- s = lock_user(VERIFY_READ, arg1, len, 1);
- if (!s) {
- /* Return bytes not written on error */
- return len;
- }
- ret = set_swi_errno(env, write(gf->hostfd, s, len));
- unlock_user(s, arg1, 0);
- if (ret == (uint32_t)-1) {
- ret = 0;
- }
- /* Return bytes not written */
- return len - ret;
- }
+ return guestfd_fns[gf->type].writefn(cpu, gf, arg1, len);
case TARGET_SYS_READ:
GET_ARG(0);
GET_ARG(1);