+++ /dev/null
-/* Native support for MIPS running SVR4, for GDB.
- Copyright (C) 1994, 1995, 2000, 2001 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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
-
-#include "defs.h"
-#include "inferior.h"
-#include "gdbcore.h"
-#include "target.h"
-#include "regcache.h"
-
-#include <sys/time.h>
-#include <sys/procfs.h>
-#include <setjmp.h> /* For JB_XXX. */
-
-/* Prototypes for supply_gregset etc. */
-#include "gregset.h"
-
-/* 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 (gregset_t *gregsetp)
-{
- int regi;
- greg_t *regp = &(*gregsetp)[0];
- char zerobuf[MAX_REGISTER_SIZE];
- memset (zerobuf, 0, MAX_REGISTER_SIZE);
-
- for (regi = 0; regi <= CXT_RA; regi++)
- regcache_raw_supply (current_regcache, regi, (char *) (regp + regi));
-
- regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->pc,
- (char *) (regp + CXT_EPC));
- regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->hi,
- (char *) (regp + CXT_MDHI));
- regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->lo,
- (char *) (regp + CXT_MDLO));
- regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->cause,
- (char *) (regp + CXT_CAUSE));
-
- /* Fill inaccessible registers with zero. */
- regcache_raw_supply (current_regcache, MIPS_PS_REGNUM, zerobuf);
- regcache_raw_supply (current_regcache,
- mips_regnum (current_gdbarch)->badvaddr,
- zerobuf);
- regcache_raw_supply (current_regcache, DEPRECATED_FP_REGNUM, zerobuf);
- regcache_raw_supply (current_regcache, MIPS_UNUSED_REGNUM, zerobuf);
- for (regi = MIPS_FIRST_EMBED_REGNUM; regi <= MIPS_LAST_EMBED_REGNUM; regi++)
- regcache_raw_supply (current_regcache, regi, zerobuf);
-}
-
-void
-fill_gregset (gregset_t *gregsetp, int regno)
-{
- int regi;
- greg_t *regp = &(*gregsetp)[0];
-
- for (regi = 0; regi <= 32; regi++)
- if ((regno == -1) || (regno == regi))
- *(regp + regi) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)];
-
- if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->pc))
- *(regp + CXT_EPC) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)];
-
- if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->cause))
- *(regp + CXT_CAUSE) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->cause)];
-
- if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->hi))
- *(regp + CXT_MDHI) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)];
-
- if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->lo))
- *(regp + CXT_MDLO) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)];
-}
-
-/*
- * 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 (fpregset_t *fpregsetp)
-{
- int regi;
- char zerobuf[MAX_REGISTER_SIZE];
- memset (zerobuf, 0, MAX_REGISTER_SIZE);
-
- for (regi = 0; regi < 32; regi++)
- regcache_raw_supply (current_regcache,
- mips_regnum (current_gdbarch)->fp0 + regi,
- (char *) &fpregsetp->fp_r.fp_regs[regi]);
-
- regcache_raw_supply (current_regcache,
- mips_regnum (current_gdbarch)->fp_control_status,
- (char *) &fpregsetp->fp_csr);
-
- /* FIXME: how can we supply FCRIR? The ABI doesn't tell us. */
- regcache_raw_supply (current_regcache,
- mips_regnum (current_gdbarch)->fp_implementation_revision,
- zerobuf);
-}
-
-void
-fill_fpregset (fpregset_t *fpregsetp, int regno)
-{
- int regi;
- char *from, *to;
-
- for (regi = mips_regnum (current_gdbarch)->fp0;
- regi < mips_regnum (current_gdbarch)->fp0 + 32; regi++)
- {
- if ((regno == -1) || (regno == regi))
- {
- from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)];
- to = (char *) &(fpregsetp->fp_r.fp_regs[regi - mips_regnum (current_gdbarch)->fp0]);
- memcpy (to, from, register_size (current_gdbarch, regi));
- }
- }
-
- if ((regno == -1)
- || (regno == mips_regnum (current_gdbarch)->fp_control_status))
- fpregsetp->fp_csr = *(unsigned *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)];
-}
-
-
-/* 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 (CORE_ADDR *pc)
-{
- char *buf;
- CORE_ADDR jb_addr;
-
- buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT);
- jb_addr = read_register (MIPS_A0_REGNUM);
-
- if (target_read_memory (jb_addr + _JB_PC * JB_ELEMENT_SIZE, buf,
- TARGET_PTR_BIT / TARGET_CHAR_BIT))
- return 0;
-
- *pc = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
-
- return 1;
-}
projects / external / binutils.git / commitdiff