typedef uint32_t sys_closefn(ARMCPU *cpu, GuestFD *gf);
typedef uint32_t sys_writefn(ARMCPU *cpu, GuestFD *gf,
target_ulong buf, uint32_t len);
+typedef uint32_t sys_readfn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len);
static uint32_t host_closefn(ARMCPU *cpu, GuestFD *gf)
{
return len - ret;
}
+static uint32_t host_readfn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len)
+{
+ uint32_t ret;
+ CPUARMState *env = &cpu->env;
+ char *s = lock_user(VERIFY_WRITE, buf, len, 0);
+ if (!s) {
+ /* return bytes not read */
+ return len;
+ }
+ do {
+ ret = set_swi_errno(env, read(gf->hostfd, s, len));
+ } while (ret == -1 && errno == EINTR);
+ unlock_user(s, buf, len);
+ if (ret == (uint32_t)-1) {
+ ret = 0;
+ }
+ /* Return bytes not read */
+ return len - ret;
+}
+
static uint32_t gdb_closefn(ARMCPU *cpu, GuestFD *gf)
{
return arm_gdb_syscall(cpu, arm_semi_cb, "close,%x", gf->hostfd);
gf->hostfd, buf, len);
}
+static uint32_t gdb_readfn(ARMCPU *cpu, GuestFD *gf,
+ target_ulong buf, uint32_t len)
+{
+ arm_semi_syscall_len = len;
+ return arm_gdb_syscall(cpu, arm_semi_cb, "read,%x,%x,%x",
+ gf->hostfd, buf, len);
+}
+
typedef struct GuestFDFunctions {
sys_closefn *closefn;
sys_writefn *writefn;
+ sys_readfn *readfn;
} GuestFDFunctions;
static const GuestFDFunctions guestfd_fns[] = {
[GuestFDHost] = {
.closefn = host_closefn,
.writefn = host_writefn,
+ .readfn = host_readfn,
},
[GuestFDGDB] = {
.closefn = gdb_closefn,
.writefn = gdb_writefn,
+ .readfn = gdb_readfn,
},
};
return set_swi_errno(env, -1);
}
- if (use_gdb_syscalls()) {
- arm_semi_syscall_len = len;
- return arm_gdb_syscall(cpu, arm_semi_cb, "read,%x,%x,%x",
- gf->hostfd, arg1, len);
- } else {
- s = lock_user(VERIFY_WRITE, arg1, len, 0);
- if (!s) {
- /* return bytes not read */
- return len;
- }
- do {
- ret = set_swi_errno(env, read(gf->hostfd, s, len));
- } while (ret == -1 && errno == EINTR);
- unlock_user(s, arg1, len);
- if (ret == (uint32_t)-1) {
- ret = 0;
- }
- /* Return bytes not read */
- return len - ret;
- }
+ return guestfd_fns[gf->type].readfn(cpu, gf, arg1, len);
case TARGET_SYS_READC:
qemu_log_mask(LOG_UNIMP, "%s: SYS_READC not implemented", __func__);
return 0;