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-rw-r--r--gdb/irix5-nat.c272
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diff --git a/gdb/irix5-nat.c b/gdb/irix5-nat.c
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--- a/gdb/irix5-nat.c
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-/* Native support for the SGI Iris running IRIX version 5, for GDB.
- Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998,
- 1999, 2000, 2001, 2002 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.
- Modified for Irix 5.x by Ian Lance Taylor.
-
- 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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#include "defs.h"
-#include "inferior.h"
-#include "gdbcore.h"
-#include "target.h"
-#include "regcache.h"
-
-#include "gdb_string.h"
-#include <sys/time.h>
-#include <sys/procfs.h>
-#include <setjmp.h> /* For JB_XXX. */
-
-/* Prototypes for supply_gregset etc. */
-#include "gregset.h"
-
-static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR);
-
-/* 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)
-{
- register int regi;
- register greg_t *regp = &(*gregsetp)[0];
- int gregoff = sizeof (greg_t) - MIPS_REGSIZE;
- static char zerobuf[32] = {0};
-
- for (regi = 0; regi <= CTX_RA; regi++)
- supply_register (regi, (char *) (regp + regi) + gregoff);
-
- supply_register (PC_REGNUM, (char *) (regp + CTX_EPC) + gregoff);
- supply_register (HI_REGNUM, (char *) (regp + CTX_MDHI) + gregoff);
- supply_register (LO_REGNUM, (char *) (regp + CTX_MDLO) + gregoff);
- supply_register (CAUSE_REGNUM, (char *) (regp + CTX_CAUSE) + gregoff);
-
- /* Fill inaccessible registers with zero. */
- supply_register (BADVADDR_REGNUM, zerobuf);
-}
-
-void
-fill_gregset (gregset_t *gregsetp, int regno)
-{
- int regi;
- register greg_t *regp = &(*gregsetp)[0];
-
- /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32
- executable, we have to sign extend the registers to 64 bits before
- filling in the gregset structure. */
-
- for (regi = 0; regi <= CTX_RA; regi++)
- if ((regno == -1) || (regno == regi))
- *(regp + regi) =
- extract_signed_integer (&registers[REGISTER_BYTE (regi)],
- REGISTER_RAW_SIZE (regi));
-
- if ((regno == -1) || (regno == PC_REGNUM))
- *(regp + CTX_EPC) =
- extract_signed_integer (&registers[REGISTER_BYTE (PC_REGNUM)],
- REGISTER_RAW_SIZE (PC_REGNUM));
-
- if ((regno == -1) || (regno == CAUSE_REGNUM))
- *(regp + CTX_CAUSE) =
- extract_signed_integer (&registers[REGISTER_BYTE (CAUSE_REGNUM)],
- REGISTER_RAW_SIZE (CAUSE_REGNUM));
-
- if ((regno == -1) || (regno == HI_REGNUM))
- *(regp + CTX_MDHI) =
- extract_signed_integer (&registers[REGISTER_BYTE (HI_REGNUM)],
- REGISTER_RAW_SIZE (HI_REGNUM));
-
- if ((regno == -1) || (regno == LO_REGNUM))
- *(regp + CTX_MDLO) =
- extract_signed_integer (&registers[REGISTER_BYTE (LO_REGNUM)],
- REGISTER_RAW_SIZE (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 (fpregset_t *fpregsetp)
-{
- register int regi;
- static char zerobuf[32] = {0};
-
- /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
-
- 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. */
- supply_register (FCRIR_REGNUM, zerobuf);
-}
-
-void
-fill_fpregset (fpregset_t *fpregsetp, int regno)
-{
- int regi;
- char *from, *to;
-
- /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
-
- 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 - 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 (CORE_ADDR *pc)
-{
- char *buf;
- CORE_ADDR jb_addr;
-
- buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT);
- 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;
-}
-
-/* Provide registers to GDB from a core file.
-
- CORE_REG_SECT points to an array of bytes, which were obtained from
- a core file which BFD thinks might contain register contents.
- CORE_REG_SIZE is its size.
-
- Normally, WHICH says which register set corelow suspects this is:
- 0 --- the general-purpose register set
- 2 --- the floating-point register set
- However, for Irix 5, WHICH isn't used.
-
- REG_ADDR is also unused. */
-
-static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
- int which, CORE_ADDR reg_addr)
-{
- if (core_reg_size == REGISTER_BYTES)
- {
- memcpy ((char *) registers, core_reg_sect, core_reg_size);
- }
- else if (MIPS_REGSIZE == 4 &&
- core_reg_size == (2 * MIPS_REGSIZE) * NUM_REGS)
- {
- /* This is a core file from a N32 executable, 64 bits are saved
- for all registers. */
- char *srcp = core_reg_sect;
- char *dstp = registers;
- int regno;
-
- for (regno = 0; regno < NUM_REGS; regno++)
- {
- if (regno >= FP0_REGNUM && regno < (FP0_REGNUM + 32))
- {
- /* FIXME, this is wrong, N32 has 64 bit FP regs, but GDB
- currently assumes that they are 32 bit. */
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- if (REGISTER_RAW_SIZE (regno) == 4)
- {
- /* copying 4 bytes from eight bytes?
- I don't see how this can be right... */
- srcp += 4;
- }
- else
- {
- /* copy all 8 bytes (sizeof(double)) */
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- }
- }
- else
- {
- srcp += 4;
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- }
- }
- }
- else
- {
- warning ("wrong size gregset struct in core file");
- return;
- }
-
- registers_fetched ();
-}
-
-/* Register that we are able to handle irix5 core file formats.
- This really is bfd_target_unknown_flavour */
-
-static struct core_fns irix5_core_fns =
-{
- bfd_target_unknown_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_core_registers, /* core_read_registers */
- NULL /* next */
-};
-
-void
-_initialize_core_irix5 (void)
-{
- add_core_fns (&irix5_core_fns);
-}
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