* Support debugging using native MACH primitives on hppa*-*-osf*.

[deliverable/binutils-gdb.git] / gdb / irix4-nat.c

diff --git a/gdb/irix4-nat.c b/gdb/irix4-nat.c
index 5127bc2bd7bba2b5023c2e4207e159ff0876d2d0..9501f353c90ea3b9cc61f70019dbea1571b0c82e 100644 (file)
--- a/gdb/irix4-nat.c
+++ b/gdb/irix4-nat.c
@@ -1,7 +1,9 @@
-/* Target-dependent code for the MIPS architecture, for GDB, the GNU Debugger.
-   Copyright 1988, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
+/* Native support for the SGI Iris running IRIX version 4, for GDB.
+   Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1995
+   Free Software Foundation, Inc.
    Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
    and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
+   Implemented for Irix 4.x by Garrett A. Wollman.
 
 This file is part of GDB.
 
@@ -20,13 +22,15 @@ along with this program; if not, write to the Free Software
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
 #include "defs.h"
-
-/*
- * Implemented for Irix 4.x by Garrett A. Wollman
- */
+#include "inferior.h"
 
 #include <sys/time.h>
 #include <sys/procfs.h>
+#include <setjmp.h>            /* For JB_XXX.  */
+
+/* Size of elements in jmpbuf */
+
+#define JB_ELEMENT_SIZE 4
 
 typedef unsigned int greg_t;   /* why isn't this defined? */
 
@@ -40,6 +44,7 @@ supply_gregset (gregsetp)
 {
   register int regi;
   register greg_t *regp = (greg_t *)(gregsetp->gp_regs);
+  static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
 
   /* FIXME: somewhere, there should be a #define for the meaning
      of this magic number 32; we should use that. */
@@ -49,7 +54,10 @@ supply_gregset (gregsetp)
   supply_register (PC_REGNUM, (char *)&(gregsetp->gp_pc));
   supply_register (HI_REGNUM, (char *)&(gregsetp->gp_mdhi));
   supply_register (LO_REGNUM, (char *)&(gregsetp->gp_mdlo));
-  supply_register (PS_REGNUM, (char *)&(gregsetp->gp_cause));
+  supply_register (CAUSE_REGNUM, (char *)&(gregsetp->gp_cause));
+
+  /* Fill inaccessible registers with zero.  */
+  supply_register (BADVADDR_REGNUM, zerobuf);
 }
 
 void
@@ -59,7 +67,6 @@ fill_gregset (gregsetp, regno)
 {
   int regi;
   register greg_t *regp = (greg_t *)(gregsetp->gp_regs);
-  extern char registers[];
 
   /* same FIXME as above wrt 32*/
   for (regi = 0; regi < 32; regi++)
@@ -69,8 +76,8 @@ fill_gregset (gregsetp, regno)
   if ((regno == -1) || (regno == PC_REGNUM))
     gregsetp->gp_pc = *(greg_t *) &registers[REGISTER_BYTE (PC_REGNUM)];
 
-  if ((regno == -1) || (regno == PS_REGNUM))
-    gregsetp->gp_cause = *(greg_t *) &registers[REGISTER_BYTE (PS_REGNUM)];
+  if ((regno == -1) || (regno == CAUSE_REGNUM))
+    gregsetp->gp_cause = *(greg_t *) &registers[REGISTER_BYTE (CAUSE_REGNUM)];
 
   if ((regno == -1) || (regno == HI_REGNUM))
     gregsetp->gp_mdhi = *(greg_t *) &registers[REGISTER_BYTE (HI_REGNUM)];
@@ -92,6 +99,7 @@ supply_fpregset (fpregsetp)
      fpregset_t *fpregsetp;
 {
   register int regi;
+  static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
 
   for (regi = 0; regi < 32; regi++)
     supply_register (FP0_REGNUM + regi,
@@ -100,6 +108,7 @@ supply_fpregset (fpregsetp)
   supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr);
 
   /* FIXME: how can we supply FCRIR_REGNUM?  SGI doesn't tell us. */
+  supply_register (FCRIR_REGNUM, zerobuf);
 }
 
 void
@@ -109,18 +118,57 @@ fill_fpregset (fpregsetp, regno)
 {
   int regi;
   char *from, *to;
-  extern char registers[];
 
   for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
     {
       if ((regno == -1) || (regno == regi))
        {
          from = (char *) &registers[REGISTER_BYTE (regi)];
-         to = (char *) &(fpregsetp->fp_r.fp_regs[regi]);
-         bcopy(from, to, REGISTER_RAW_SIZE (regi));
+         to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]);
+         memcpy(to, from, REGISTER_RAW_SIZE (regi));
        }
     }
 
   if ((regno == -1) || (regno == FCRCS_REGNUM))
     fpregsetp->fp_csr = *(unsigned *) &registers[REGISTER_BYTE(FCRCS_REGNUM)];
 }
+
+
+/* Figure out where the longjmp will land.
+   We expect the first arg to be a pointer to the jmp_buf structure from which
+   we extract the pc (JB_PC) that we will land at.  The pc is copied into PC.
+   This routine returns true on success. */
+
+int
+get_longjmp_target (pc)
+     CORE_ADDR *pc;
+{
+  char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
+  CORE_ADDR jb_addr;
+
+  jb_addr = read_register (A0_REGNUM);
+
+  if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
+                         TARGET_PTR_BIT / TARGET_CHAR_BIT))
+    return 0;
+
+  *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
+
+  return 1;
+}
+
+void
+fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
+     char *core_reg_sect;
+     unsigned core_reg_size;
+     int which;                        /* Unused */
+     unsigned int reg_addr;    /* Unused */
+{
+  if (core_reg_size != REGISTER_BYTES)
+    {
+      warning ("wrong size gregset struct in core file");
+      return;
+    }
+
+  memcpy ((char *)registers, core_reg_sect, core_reg_size);
+}