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- /* Native support for MIPS running SVR4, for GDB.
- Copyright 1994 Free Software Foundation, Inc.
-
- 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 "gdbcore.h"
- #include "target.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
-
- /*
- * See the comment in m68k-tdep.c regarding the utility of these functions.
- *
- * These definitions are from the MIPS SVR4 ABI, so they may work for
- * any MIPS SVR4 target.
- */
-
- void
- supply_gregset (gregsetp)
- gregset_t *gregsetp;
- {
- register int regi;
- register greg_t *regp = &(*gregsetp)[0];
-
- for(regi = 0; regi <= CXT_RA; regi++)
- supply_register (regi, (char *)(regp + regi));
-
- supply_register (PC_REGNUM, (char *)(regp + CXT_EPC));
- supply_register (HI_REGNUM, (char *)(regp + CXT_MDHI));
- supply_register (LO_REGNUM, (char *)(regp + CXT_MDLO));
- supply_register (CAUSE_REGNUM, (char *)(regp + CXT_CAUSE));
- }
-
- void
- fill_gregset (gregsetp, regno)
- gregset_t *gregsetp;
- int regno;
- {
- int regi;
- register greg_t *regp = &(*gregsetp)[0];
-
- 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))
- *(regp + CXT_EPC) = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)];
-
- if ((regno == -1) || (regno == CAUSE_REGNUM))
- *(regp + CXT_CAUSE) = *(greg_t *) ®isters[REGISTER_BYTE (PS_REGNUM)];
-
- if ((regno == -1) || (regno == HI_REGNUM))
- *(regp + CXT_MDHI) = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)];
-
- if ((regno == -1) || (regno == LO_REGNUM))
- *(regp + CXT_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? The ABI 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]);
- memcpy(to, from, 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;
- {
- 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;
- }
-