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- /* Native support for the SGI Iris running IRIX version 4, for GDB.
- Copyright 1988, 1989, 1990, 1991, 1992, 1993 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.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "defs.h"
- #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? */
-
- /*
- * See the comment in m68k-tdep.c regarding the utility of these functions.
- */
-
- void
- supply_gregset (gregsetp)
- gregset_t *gregsetp;
- {
- register int regi;
- register greg_t *regp = (greg_t *)(gregsetp->gp_regs);
-
- /* FIXME: somewhere, there should be a #define for the meaning
- of this magic number 32; we should use that. */
- for(regi = 0; regi < 32; regi++)
- supply_register (regi, (char *)(regp + regi));
-
- 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));
- }
-
- void
- fill_gregset (gregsetp, regno)
- gregset_t *gregsetp;
- int regno;
- {
- int regi;
- register greg_t *regp = (greg_t *)(gregsetp->gp_regs);
-
- /* same FIXME as above wrt 32*/
- for (regi = 0; regi < 32; regi++)
- if ((regno == -1) || (regno == regi))
- *(regp + regi) = *(greg_t *) ®isters[REGISTER_BYTE (regi)];
-
- if ((regno == -1) || (regno == PC_REGNUM))
- gregsetp->gp_pc = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)];
-
- if ((regno == -1) || (regno == PS_REGNUM))
- gregsetp->gp_cause = *(greg_t *) ®isters[REGISTER_BYTE (PS_REGNUM)];
-
- if ((regno == -1) || (regno == HI_REGNUM))
- gregsetp->gp_mdhi = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)];
-
- if ((regno == -1) || (regno == LO_REGNUM))
- gregsetp->gp_mdlo = *(greg_t *) ®isters[REGISTER_BYTE (LO_REGNUM)];
- }
-
- /*
- * Now we do the same thing for floating-point registers.
- * We don't bother to condition on FP0_REGNUM since any
- * reasonable MIPS configuration has an R3010 in it.
- *
- * Again, see the comments in m68k-tdep.c.
- */
-
- void
- supply_fpregset (fpregsetp)
- fpregset_t *fpregsetp;
- {
- register int regi;
-
- for (regi = 0; regi < 32; regi++)
- supply_register (FP0_REGNUM + regi,
- (char *)&fpregsetp->fp_r.fp_regs[regi]);
-
- supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr);
-
- /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */
- }
-
- void
- fill_fpregset (fpregsetp, regno)
- fpregset_t *fpregsetp;
- int regno;
- {
- int regi;
- char *from, *to;
-
- for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
- {
- if ((regno == -1) || (regno == regi))
- {
- from = (char *) ®isters[REGISTER_BYTE (regi)];
- to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]);
- bcopy(from, to, REGISTER_RAW_SIZE (regi));
- }
- }
-
- if ((regno == -1) || (regno == FCRCS_REGNUM))
- fpregsetp->fp_csr = *(unsigned *) ®isters[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;
- {
- CORE_ADDR jb_addr;
-
- jb_addr = read_register(A0_REGNUM);
-
- if (target_read_memory(jb_addr + JB_PC * JB_ELEMENT_SIZE, pc,
- sizeof(CORE_ADDR)))
- return 0;
-
- SWAP_TARGET_AND_HOST(pc, sizeof(CORE_ADDR));
-
- 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);
- }
-