Support the RedBoot SWI in ARM mode and some of its system calls.

diff --git a/sim/arm/ChangeLog b/sim/arm/ChangeLog
index 04c7e28087161648ebe68e61ae1c4d1cd0b967f6..e10ef891d140968fc01fd07a09ab62b535ce311d 100644 (file)
--- a/sim/arm/ChangeLog
+++ b/sim/arm/ChangeLog
@@ -1,3 +1,8 @@
+2002-05-09  Nick Clifton  <nickc@cambridge.redhat.com>
+
+       * armos.c (ARMul_OSHandleSWI): Support the RedBoot SWI in ARM
+       mode and some of its system calls.
+
 2002-03-17  Anthony Green  <green@redhat.com>
 
        * wrapper.c (mem_size): Increase the default target memory to 8MB.

diff --git a/sim/arm/armos.c b/sim/arm/armos.c
index 3b0db22b34d71f1d43f8d737cb8c1f39ddbdc1db..bdc53d4e6c381770c82e27cb705fc3e68f5c6a29 100644 (file)
--- a/sim/arm/armos.c
+++ b/sim/arm/armos.c
@@ -48,7 +48,7 @@
 #endif
 
 #ifdef HAVE_UNISTD_H
-#include <unistd.h>            /* For SEEK_SET etc */
+#include <unistd.h>            /* For SEEK_SET etc.  */
 #endif
 
 #ifdef __riscos
@@ -86,13 +86,12 @@ extern int _fisatty (FILE *);
 #include "callback.h"
 extern host_callback *sim_callback;
 
-extern unsigned ARMul_OSInit (ARMul_State * state);
-extern void ARMul_OSExit (ARMul_State * state);
-extern unsigned ARMul_OSHandleSWI (ARMul_State * state, ARMword number);
-extern unsigned ARMul_OSException (ARMul_State * state, ARMword vector,
-                                  ARMword pc);
-extern ARMword ARMul_OSLastErrorP (ARMul_State * state);
-extern ARMword ARMul_Debug (ARMul_State * state, ARMword pc, ARMword instr);
+extern unsigned ARMul_OSInit       (ARMul_State *);
+extern void     ARMul_OSExit       (ARMul_State *);
+extern unsigned ARMul_OSHandleSWI  (ARMul_State *, ARMword);
+extern unsigned ARMul_OSException  (ARMul_State *, ARMword, ARMword);
+extern ARMword  ARMul_OSLastErrorP (ARMul_State *);
+extern ARMword  ARMul_Debug        (ARMul_State *, ARMword, ARMword);
 
 #define BUFFERSIZE 4096
 #ifndef FOPEN_MAX
@@ -164,15 +163,15 @@ ARMul_OSInit (ARMul_State * state)
   
   OSptr = (struct OSblock *) state->OSptr;
   OSptr->ErrorP = 0;
-  state->Reg[13] = ADDRSUPERSTACK;     /* set up a stack for the current mode */
-  ARMul_SetReg (state, SVC32MODE, 13, ADDRSUPERSTACK); /* and for supervisor mode */
-  ARMul_SetReg (state, ABORT32MODE, 13, ADDRSUPERSTACK);       /* and for abort 32 mode */
-  ARMul_SetReg (state, UNDEF32MODE, 13, ADDRSUPERSTACK);       /* and for undef 32 mode */
-  ARMul_SetReg (state, SYSTEMMODE, 13, ADDRSUPERSTACK);        /* and for system mode */
-  instr = 0xe59ff000 | (ADDRSOFTVECTORS - 8);  /* load pc from soft vector */
+  state->Reg[13] = ADDRSUPERSTACK;                     /* Set up a stack for the current mode...  */
+  ARMul_SetReg (state, SVC32MODE,   13, ADDRSUPERSTACK);/* ...and for supervisor mode...  */
+  ARMul_SetReg (state, ABORT32MODE, 13, ADDRSUPERSTACK);/* ...and for abort 32 mode...  */
+  ARMul_SetReg (state, UNDEF32MODE, 13, ADDRSUPERSTACK);/* ...and for undef 32 mode...  */
+  ARMul_SetReg (state, SYSTEMMODE,  13, ADDRSUPERSTACK);/* ...and for system mode.  */
+  instr = 0xe59ff000 | (ADDRSOFTVECTORS - 8);          /* Load pc from soft vector */
   
   for (i = ARMul_ResetV; i <= ARMFIQV; i += 4)
-    ARMul_WriteWord (state, i, instr); /* write hardware vectors */
+    ARMul_WriteWord (state, i, instr); /* Write hardware vectors.  */
   
   SWI_vector_installed = 0;
 
@@ -196,16 +195,19 @@ ARMul_OSInit (ARMul_State * state)
 
 /* #ifndef ASIM */
 
-  /* install fpe */
-  for (i = 0; i < fpesize; i += 4)     /* copy the code */
+  /* Install FPE.  */
+  for (i = 0; i < fpesize; i += 4)
+    /* Copy the code.  */
     ARMul_WriteWord (state, FPESTART + i, fpecode[i >> 2]);
 
   for (i = FPESTART + fpesize;; i -= 4)
-    {                          /* reverse the error strings */
+    {
+      /* Reverse the error strings.  */
       if ((j = ARMul_ReadWord (state, i)) == 0xffffffff)
        break;
       if (state->bigendSig && j < 0x80000000)
-       {                       /* it's part of the string so swap it */
+       {
+         /* It's part of the string so swap it.  */
          j = ((j >> 0x18) & 0x000000ff) |
            ((j >> 0x08) & 0x0000ff00) |
            ((j << 0x08) & 0x00ff0000) | ((j << 0x18) & 0xff000000);
@@ -213,8 +215,10 @@ ARMul_OSInit (ARMul_State * state)
        }
     }
 
-  ARMul_WriteWord (state, FPEOLDVECT, ARMul_ReadWord (state, 4));      /* copy old illegal instr vector */
-  ARMul_WriteWord (state, 4, FPENEWVECT (ARMul_ReadWord (state, i - 4)));      /* install new vector */
+  /* Copy old illegal instr vector.  */
+  ARMul_WriteWord (state, FPEOLDVECT, ARMul_ReadWord (state, 4));
+  /* Install new vector.  */
+  ARMul_WriteWord (state, 4, FPENEWVECT (ARMul_ReadWord (state, i - 4)));
   ARMul_ConsolePrint (state, ", FPE");
 
 /* #endif  ASIM */
@@ -321,8 +325,10 @@ SWIread (ARMul_State * state, ARMword f, ARMword ptr, ARMword len)
 
   if (local == NULL)
     {
-      sim_callback->printf_filtered (sim_callback, "sim: Unable to read 0x%ulx bytes - out of memory\n",
-              len);
+      sim_callback->printf_filtered
+       (sim_callback,
+        "sim: Unable to read 0x%ulx bytes - out of memory\n",
+        len);
       return;
     }
 
@@ -346,8 +352,10 @@ SWIwrite (ARMul_State * state, ARMword f, ARMword ptr, ARMword len)
 
   if (local == NULL)
     {
-      sim_callback->printf_filtered (sim_callback, "sim: Unable to write 0x%lx bytes - out of memory\n",
-              (long) len);
+      sim_callback->printf_filtered
+       (sim_callback,
+        "sim: Unable to write 0x%lx bytes - out of memory\n",
+        (long) len);
       return;
     }
 
@@ -580,10 +588,10 @@ ARMul_OSHandleSWI (ARMul_State * state, ARMword number)
          else
            temp = ADDRUSERSTACK;
 
-         ARMul_WriteWord (state, addr, 0);     /* Heap base */
-         ARMul_WriteWord (state, addr + 4, temp);      /* Heap limit */
-         ARMul_WriteWord (state, addr + 8, temp);      /* Stack base */
-         ARMul_WriteWord (state, addr + 12, temp);     /* Stack limit */
+         ARMul_WriteWord (state, addr, 0);             /* Heap base.  */
+         ARMul_WriteWord (state, addr + 4, temp);      /* Heap limit.  */
+         ARMul_WriteWord (state, addr + 8, temp);      /* Stack base.  */
+         ARMul_WriteWord (state, addr + 12, temp);     /* Stack limit.  */
          break;
 
        case AngelSWI_Reason_ReportException:
@@ -635,6 +643,69 @@ ARMul_OSHandleSWI (ARMul_State * state, ARMword number)
       /* These are used by the FPE code.  */
       break;
       
+    case 0x180001: /* RedBoot's Syscall SWI in ARM mode.  */
+      switch (state->Reg[0])
+       {
+         /* These numbers are defined in libgloss/syscall.h
+            but the simulator should not be dependend upon
+            libgloss being installed.  */
+       case 1:  /* Exit.  */
+         state->Emulate = FALSE;
+         return TRUE;
+
+       case 2:  /* Open.  */
+         SWIopen (state, state->Reg[1], state->Reg[2]);
+         return TRUE;
+
+       case 3:  /* Close.  */
+         state->Reg[0] = close (state->Reg[1]);
+         OSptr->ErrorNo = errno;
+         return TRUE;
+
+       case 4:  /* Read.  */
+         SWIread (state, state->Reg[1], state->Reg[2], state->Reg[3]);
+         return TRUE;
+
+       case 5:  /* Write.  */
+         SWIwrite (state, state->Reg[1], state->Reg[2], state->Reg[3]);
+         return TRUE;
+
+       case 6:  /* Lseek.  */
+         state->Reg[0] = lseek (state->Reg[1], state->Reg[2], state->Reg[3]);
+         OSptr->ErrorNo = errno;
+         return TRUE;
+
+       case 17: /* Utime.  */
+         state->Reg[0] = (ARMword) time (state->Reg[1]);
+         OSptr->ErrorNo = errno;
+         return (TRUE);
+
+       case 7:  /* Unlink.  */
+       case 8:  /* Getpid.  */
+       case 9:  /* Kill.  */
+       case 10: /* Fstat.  */
+       case 11: /* Sbrk.  */
+       case 12: /* Argvlen.  */
+       case 13: /* Argv.  */
+       case 14: /* ChDir.  */
+       case 15: /* Stat.  */
+       case 16: /* Chmod.  */
+       case 18: /* Time.  */
+         sim_callback->printf_filtered
+           (sim_callback,
+            "sim: unhandled RedBoot syscall '%d' encountered - ignoring\n",
+            state->Reg[0]);
+         return FALSE;
+
+       default:
+         sim_callback->printf_filtered
+           (sim_callback,
+            "sim: unknown RedBoot syscall '%d' encountered - ignoring\n",
+            state->Reg[0]);
+         return FALSE;
+       }
+      return TRUE;
+      
     default:
       /* If there is a SWI vector installed use it.  */
       if (state->is_XScale && saved_number != -1)
@@ -661,7 +732,10 @@ ARMul_OSHandleSWI (ARMul_State * state, ARMword number)
        }
       else
        {
-         sim_callback->printf_filtered (sim_callback, "sim: unknown SWI encountered - %x - ignoring\n", number);
+         sim_callback->printf_filtered
+           (sim_callback,
+            "sim: unknown SWI encountered - %x - ignoring\n",
+            number);
          return FALSE;
        }
     }