CRIS Linux userland emulation, part 2. By Edgar E. Iglesias.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3367 c046a42c-6fe2-441c-8c8c-71466251a162

linux-user/elfload.c

@@ -334,6 +334,26 @@ static inline void init_thread(struct target_pt_regs *regs, struct image_info *i
 
 #endif
 
+#ifdef TARGET_CRIS
+
+#define ELF_START_MMAP 0x80000000
+
+#define elf_check_arch(x) ( (x) == EM_CRIS )
+
+#define ELF_CLASS ELFCLASS32
+#define ELF_DATA  ELFDATA2LSB
+#define ELF_ARCH  EM_CRIS
+
+static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
+{
+  regs->erp = infop->entry;
+}
+
+#define USE_ELF_CORE_DUMP
+#define ELF_EXEC_PAGESIZE        8192
+
+#endif
+
 #ifdef TARGET_M68K
 
 #define ELF_START_MMAP 0x80000000

linux-user/main.c

@@ -1601,6 +1601,61 @@ void cpu_loop (CPUState *env)
 }
 #endif
 
+#ifdef TARGET_CRIS
+void cpu_loop (CPUState *env)
+{
+    int trapnr, ret;
+    target_siginfo_t info;
+    
+    while (1) {
+        trapnr = cpu_cris_exec (env);
+        switch (trapnr) {
+        case 0xaa:
+            {
+                info.si_signo = SIGSEGV;
+                info.si_errno = 0;
+                /* XXX: check env->error_code */
+                info.si_code = TARGET_SEGV_MAPERR;
+                info._sifields._sigfault._addr = env->debug1;
+                queue_signal(info.si_signo, &info);
+            }
+            break;
+        case EXCP_BREAK:
+            ret = do_syscall(env, 
+                             env->regs[9], 
+                             env->regs[10], 
+                             env->regs[11], 
+                             env->regs[12], 
+                             env->regs[13], 
+                             env->pregs[7], 
+                             env->pregs[11]);
+            env->regs[10] = ret;
+            env->pc += 2;
+            break;
+        case EXCP_DEBUG:
+            {
+                int sig;
+
+                sig = gdb_handlesig (env, TARGET_SIGTRAP);
+                if (sig)
+                  {
+                    info.si_signo = sig;
+                    info.si_errno = 0;
+                    info.si_code = TARGET_TRAP_BRKPT;
+                    queue_signal(info.si_signo, &info);
+                  }
+            }
+            break;
+        default:
+            printf ("Unhandled trap: 0x%x\n", trapnr);
+            cpu_dump_state(env, stderr, fprintf, 0);
+            exit (1);
+        }
+        process_pending_signals (env);
+    }
+}
+#endif
+
 #ifdef TARGET_M68K
 
 void cpu_loop(CPUM68KState *env)
@@ -2195,6 +2250,26 @@ int main(int argc, char **argv)
         env->pc = regs->pc;
         env->unique = regs->unique;
     }
+#elif defined(TARGET_CRIS)
+    {
+	    env->regs[0] = regs->r0;
+	    env->regs[1] = regs->r1;
+	    env->regs[2] = regs->r2;
+	    env->regs[3] = regs->r3;
+	    env->regs[4] = regs->r4;
+	    env->regs[5] = regs->r5;
+	    env->regs[6] = regs->r6;
+	    env->regs[7] = regs->r7;
+	    env->regs[8] = regs->r8;
+	    env->regs[9] = regs->r9;
+	    env->regs[10] = regs->r10;
+	    env->regs[11] = regs->r11;
+	    env->regs[12] = regs->r12;
+	    env->regs[13] = regs->r13;
+	    env->regs[14] = info->start_stack;
+	    env->regs[15] = regs->acr;	    
+	    env->pc = regs->erp;
+    }
 #else
 #error unsupported target CPU
 #endif

linux-user/syscall.c

@@ -74,7 +74,7 @@
 //#define DEBUG
 
 #if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_SPARC) \
-    || defined(TARGET_M68K) || defined(TARGET_SH4)
+    || defined(TARGET_M68K) || defined(TARGET_SH4) || defined(TARGET_CRIS)
 /* 16 bit uid wrappers emulation */
 #define USE_UID16
 #endif
@@ -2286,6 +2286,10 @@ int do_fork(CPUState *env, unsigned int flags, target_ulong newsp)
             for (i = 7; i < 30; i++)
                 new_env->ir[i] = 0;
         }
+#elif defined(TARGET_CRIS)
+	if (!newsp)
+	  newsp = env->regs[14];
+	new_env->regs[14] = newsp;
 #else
 #error unsupported target CPU
 #endif
@@ -3502,7 +3506,7 @@ target_long do_syscall(void *cpu_env, int num, target_long arg1,
 #endif
 #ifdef TARGET_NR_mmap
     case TARGET_NR_mmap:
-#if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_M68K)
+#if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_CRIS)
         {
             target_ulong *v;
             target_ulong v1, v2, v3, v4, v5, v6;

linux-user/syscall_defs.h

@@ -49,7 +49,7 @@
 #define TARGET_IOC_TYPEBITS	8
 
 #if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_SH4) \
-    || defined(TARGET_M68K) || defined(TARGET_ALPHA)
+    || defined(TARGET_M68K) || defined(TARGET_ALPHA) || defined(TARGET_CRIS)
 
 #define TARGET_IOC_SIZEBITS	14
 #define TARGET_IOC_DIRBITS	2
@@ -289,7 +289,7 @@ struct target_sigaction;
 int do_sigaction(int sig, const struct target_sigaction *act,
                  struct target_sigaction *oact);
 
-#if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_PPC) || defined(TARGET_MIPS) || defined (TARGET_SH4) || defined(TARGET_M68K) || defined(TARGET_ALPHA)
+#if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_PPC) || defined(TARGET_MIPS) || defined (TARGET_SH4) || defined(TARGET_M68K) || defined(TARGET_ALPHA) || defined(TARGET_CRIS)
 
 #if defined(TARGET_SPARC)
 #define TARGET_SA_NOCLDSTOP    8u
@@ -884,7 +884,7 @@ struct target_winsize {
 #define TARGET_MAP_NONBLOCK	0x10000		/* do not block on IO */
 #endif
 
-#if defined(TARGET_I386) || defined(TARGET_ARM)
+#if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_CRIS)
 struct target_stat {
 	unsigned short st_dev;
 	unsigned short __pad1;