gdbstub: Change syscall callback argument to CPUState

Callback implementations were specific to arm and m68k, so can easily
cast to ARMCPU and M68kCPU respectively.

Prepares for changing GDBState::c_cpu to CPUState.

Signed-off-by: Andreas Färber <afaerber@suse.de>

gdbstub.c

@@ -2205,7 +2205,7 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
                 p++;
             type = *p;
             if (s->current_syscall_cb) {
-                s->current_syscall_cb(s->c_cpu, ret, err);
+                s->current_syscall_cb(ENV_GET_CPU(s->c_cpu), ret, err);
                 s->current_syscall_cb = NULL;
             }
             if (type == 'C') {

include/exec/gdbstub.h

@@ -11,7 +11,7 @@
 #define GDB_WATCHPOINT_ACCESS    4
 
 #ifdef NEED_CPU_H
-typedef void (*gdb_syscall_complete_cb)(CPUArchState *env,
+typedef void (*gdb_syscall_complete_cb)(CPUState *cpu,
                                         target_ulong ret, target_ulong err);
 
 void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...);

target-arm/arm-semi.c

@@ -122,8 +122,10 @@ static target_ulong arm_semi_syscall_len;
 static target_ulong syscall_err;
 #endif
 
-static void arm_semi_cb(CPUARMState *env, target_ulong ret, target_ulong err)
+static void arm_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
 {
+    ARMCPU *cpu = ARM_CPU(cs);
+    CPUARMState *env = &cpu->env;
 #ifdef CONFIG_USER_ONLY
     TaskState *ts = env->opaque;
 #endif
@@ -152,8 +154,10 @@ static void arm_semi_cb(CPUARMState *env, target_ulong ret, target_ulong err)
     }
 }
 
-static void arm_semi_flen_cb(CPUARMState *env, target_ulong ret, target_ulong err)
+static void arm_semi_flen_cb(CPUState *cs, target_ulong ret, target_ulong err)
 {
+    ARMCPU *cpu = ARM_CPU(cs);
+    CPUARMState *env = &cpu->env;
     /* The size is always stored in big-endian order, extract
        the value. We assume the size always fit in 32 bits.  */
     uint32_t size;

target-m68k/m68k-semi.c

@@ -161,8 +161,11 @@ static void m68k_semi_return_u64(CPUM68KState *env, uint64_t ret, uint32_t err)
 
 static int m68k_semi_is_fseek;
 
-static void m68k_semi_cb(CPUM68KState *env, target_ulong ret, target_ulong err)
+static void m68k_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
 {
+    M68kCPU *cpu = M68K_CPU(cs);
+    CPUM68KState *env = &cpu->env;
+
     if (m68k_semi_is_fseek) {
         /* FIXME: We've already lost the high bits of the fseek
            return value.  */