linux-user: Bump do_syscall() up to 8 syscall arguments

On 32 bit MIPS a few syscalls have 7 arguments, and so to call
them via NR_syscall the guest needs to be able to pass 8 arguments
to do_syscall(). Raise the number of arguments do_syscall() takes
accordingly.

This fixes some gcc 4.6 compiler warnings about arg7 and arg8
variables being set and never used.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>

linux-user/main.c

@@ -319,7 +319,8 @@ void cpu_loop(CPUX86State *env)
                                           env->regs[R_EDX],
                                           env->regs[R_ESI],
                                           env->regs[R_EDI],
-                                          env->regs[R_EBP]);
+                                          env->regs[R_EBP],
+                                          0, 0);
             break;
 #ifndef TARGET_ABI32
         case EXCP_SYSCALL:
@@ -331,7 +332,8 @@ void cpu_loop(CPUX86State *env)
                                           env->regs[R_EDX],
                                           env->regs[10],
                                           env->regs[8],
-                                          env->regs[9]);
+                                          env->regs[9],
+                                          0, 0);
             env->eip = env->exception_next_eip;
             break;
 #endif
@@ -735,7 +737,8 @@ void cpu_loop(CPUARMState *env)
                                                   env->regs[2],
                                                   env->regs[3],
                                                   env->regs[4],
-                                                  env->regs[5]);
+                                                  env->regs[5],
+                                                  0, 0);
                     }
                 } else {
                     goto error;
@@ -831,7 +834,8 @@ void cpu_loop(CPUState *env)
                                                   env->regs[2],
                                                   env->regs[3],
                                                   env->regs[4],
-                                                  env->regs[5]);
+                                                  env->regs[5],
+                                                  0, 0);
                     }
                 } else {
                     goto error;
@@ -1018,7 +1022,8 @@ void cpu_loop (CPUSPARCState *env)
             ret = do_syscall (env, env->gregs[1],
                               env->regwptr[0], env->regwptr[1],
                               env->regwptr[2], env->regwptr[3],
-                              env->regwptr[4], env->regwptr[5]);
+                              env->regwptr[4], env->regwptr[5],
+                              0, 0);
             if ((abi_ulong)ret >= (abi_ulong)(-515)) {
 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
                 env->xcc |= PSR_CARRY;
@@ -1611,7 +1616,7 @@ void cpu_loop(CPUPPCState *env)
             env->crf[0] &= ~0x1;
             ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
                              env->gpr[5], env->gpr[6], env->gpr[7],
-                             env->gpr[8]);
+                             env->gpr[8], 0, 0);
             if (ret == (uint32_t)(-TARGET_QEMU_ESIGRETURN)) {
                 /* Returning from a successful sigreturn syscall.
                    Avoid corrupting register state.  */
@@ -2072,7 +2077,7 @@ void cpu_loop(CPUMIPSState *env)
                                  env->active_tc.gpr[5],
                                  env->active_tc.gpr[6],
                                  env->active_tc.gpr[7],
-                                 arg5, arg6/*, arg7, arg8*/);
+                                 arg5, arg6, arg7, arg8);
             }
             if (ret == -TARGET_QEMU_ESIGRETURN) {
                 /* Returning from a successful sigreturn syscall.
@@ -2160,7 +2165,8 @@ void cpu_loop (CPUState *env)
                              env->gregs[6],
                              env->gregs[7],
                              env->gregs[0],
-                             env->gregs[1]);
+                             env->gregs[1],
+                             0, 0);
             env->gregs[0] = ret;
             break;
         case EXCP_INTERRUPT:
@@ -2229,7 +2235,8 @@ void cpu_loop (CPUState *env)
                              env->regs[12], 
                              env->regs[13], 
                              env->pregs[7], 
-                             env->pregs[11]);
+                             env->pregs[11],
+                             0, 0);
             env->regs[10] = ret;
             break;
         case EXCP_DEBUG:
@@ -2288,7 +2295,8 @@ void cpu_loop (CPUState *env)
                              env->regs[7], 
                              env->regs[8], 
                              env->regs[9], 
-                             env->regs[10]);
+                             env->regs[10],
+                             0, 0);
             env->regs[3] = ret;
             env->sregs[SR_PC] = env->regs[14];
             break;
@@ -2398,7 +2406,8 @@ void cpu_loop(CPUM68KState *env)
                                           env->dregs[3],
                                           env->dregs[4],
                                           env->dregs[5],
-                                          env->aregs[0]);
+                                          env->aregs[0],
+                                          0, 0);
             }
             break;
         case EXCP_INTERRUPT:
@@ -2576,7 +2585,8 @@ void cpu_loop (CPUState *env)
                 sysret = do_syscall(env, trapnr,
                                     env->ir[IR_A0], env->ir[IR_A1],
                                     env->ir[IR_A2], env->ir[IR_A3],
-                                    env->ir[IR_A4], env->ir[IR_A5]);
+                                    env->ir[IR_A4], env->ir[IR_A5],
+                                    0, 0);
                 if (trapnr == TARGET_NR_sigreturn
                     || trapnr == TARGET_NR_rt_sigreturn) {
                     break;
@@ -2707,7 +2717,8 @@ void cpu_loop(CPUS390XState *env)
                            env->regs[4],
                            env->regs[5],
                            env->regs[6],
-                           env->regs[7]);
+                           env->regs[7],
+                           0, 0);
             }
             break;
         case EXCP_ADDR:

linux-user/qemu.h

@@ -192,7 +192,8 @@ abi_long do_brk(abi_ulong new_brk);
 void syscall_init(void);
 abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
                     abi_long arg2, abi_long arg3, abi_long arg4,
-                    abi_long arg5, abi_long arg6);
+                    abi_long arg5, abi_long arg6, abi_long arg7,
+                    abi_long arg8);
 void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
 extern THREAD CPUState *thread_env;
 void cpu_loop(CPUState *env);

linux-user/syscall.c

@@ -4532,7 +4532,8 @@ int get_osversion(void)
    All errnos that do_syscall() returns must be -TARGET_<errcode>. */
 abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
                     abi_long arg2, abi_long arg3, abi_long arg4,
-                    abi_long arg5, abi_long arg6)
+                    abi_long arg5, abi_long arg6, abi_long arg7,
+                    abi_long arg8)
 {
     abi_long ret;
     struct stat st;
@@ -6172,8 +6173,9 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
 #endif
 #ifdef TARGET_NR_syscall
     case TARGET_NR_syscall:
-    	ret = do_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0);
-    	break;
+        ret = do_syscall(cpu_env, arg1 & 0xffff, arg2, arg3, arg4, arg5,
+                         arg6, arg7, arg8, 0);
+        break;
 #endif
     case TARGET_NR_wait4:
         {