1 /* Native support for the SGI Iris running IRIX version 5, for GDB.
2 Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998,
3 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
4 Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
5 and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
6 Implemented for Irix 4.x by Garrett A. Wollman.
7 Modified for Irix 5.x by Ian Lance Taylor.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 59 Temple Place - Suite 330,
24 Boston, MA 02111-1307, USA. */
32 #include "gdb_string.h"
34 #include <sys/procfs.h>
35 #include <setjmp.h> /* For JB_XXX. */
37 /* Prototypes for supply_gregset etc. */
40 static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR);
42 /* Size of elements in jmpbuf */
44 #define JB_ELEMENT_SIZE 4
47 * See the comment in m68k-tdep.c regarding the utility of these functions.
49 * These definitions are from the MIPS SVR4 ABI, so they may work for
50 * any MIPS SVR4 target.
54 supply_gregset (gregset_t *gregsetp)
57 greg_t *regp = &(*gregsetp)[0];
58 int gregoff = sizeof (greg_t) - mips_regsize (current_gdbarch);
59 static char zerobuf[32] = {0};
61 for (regi = 0; regi <= CTX_RA; regi++)
62 supply_register (regi, (char *) (regp + regi) + gregoff);
64 supply_register (mips_regnum (current_gdbarch)->pc,
65 (char *) (regp + CTX_EPC) + gregoff);
66 supply_register (mips_regnum (current_gdbarch)->hi,
67 (char *) (regp + CTX_MDHI) + gregoff);
68 supply_register (mips_regnum (current_gdbarch)->lo,
69 (char *) (regp + CTX_MDLO) + gregoff);
70 supply_register (mips_regnum (current_gdbarch)->cause,
71 (char *) (regp + CTX_CAUSE) + gregoff);
73 /* Fill inaccessible registers with zero. */
74 supply_register (mips_regnum (current_gdbarch)->badvaddr, zerobuf);
78 fill_gregset (gregset_t *gregsetp, int regno)
81 greg_t *regp = &(*gregsetp)[0];
83 /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32
84 executable, we have to sign extend the registers to 64 bits before
85 filling in the gregset structure. */
87 for (regi = 0; regi <= CTX_RA; regi++)
88 if ((regno == -1) || (regno == regi))
90 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)],
91 DEPRECATED_REGISTER_RAW_SIZE (regi));
93 if ((regno == -1) || (regno == PC_REGNUM))
95 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)],
96 DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->pc));
98 if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->cause))
100 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->cause)],
101 DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->cause));
104 || (regno == mips_regnum (current_gdbarch)->hi))
106 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)],
107 DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->hi));
109 if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->lo))
111 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)],
112 DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->lo));
116 * Now we do the same thing for floating-point registers.
117 * We don't bother to condition on FP0_REGNUM since any
118 * reasonable MIPS configuration has an R3010 in it.
120 * Again, see the comments in m68k-tdep.c.
124 supply_fpregset (fpregset_t *fpregsetp)
127 static char zerobuf[32] = {0};
129 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
131 for (regi = 0; regi < 32; regi++)
132 supply_register (FP0_REGNUM + regi,
133 (char *) &fpregsetp->fp_r.fp_regs[regi]);
135 supply_register (mips_regnum (current_gdbarch)->fp_control_status,
136 (char *) &fpregsetp->fp_csr);
138 /* FIXME: how can we supply FCRIR? SGI doesn't tell us. */
139 supply_register (mips_regnum (current_gdbarch)->fp_implementation_revision,
144 fill_fpregset (fpregset_t *fpregsetp, int regno)
149 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
151 for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
153 if ((regno == -1) || (regno == regi))
155 from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)];
156 to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]);
157 memcpy (to, from, DEPRECATED_REGISTER_RAW_SIZE (regi));
162 || (regno == mips_regnum (current_gdbarch)->fp_control_status))
163 fpregsetp->fp_csr = *(unsigned *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)];
167 /* Figure out where the longjmp will land.
168 We expect the first arg to be a pointer to the jmp_buf structure from which
169 we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
170 This routine returns true on success. */
173 get_longjmp_target (CORE_ADDR *pc)
178 buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT);
179 jb_addr = read_register (A0_REGNUM);
181 if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
182 TARGET_PTR_BIT / TARGET_CHAR_BIT))
185 *pc = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
190 /* Provide registers to GDB from a core file.
192 CORE_REG_SECT points to an array of bytes, which were obtained from
193 a core file which BFD thinks might contain register contents.
194 CORE_REG_SIZE is its size.
196 Normally, WHICH says which register set corelow suspects this is:
197 0 --- the general-purpose register set
198 2 --- the floating-point register set
199 However, for Irix 5, WHICH isn't used.
201 REG_ADDR is also unused. */
204 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
205 int which, CORE_ADDR reg_addr)
207 if (core_reg_size == DEPRECATED_REGISTER_BYTES)
209 memcpy ((char *) deprecated_registers, core_reg_sect, core_reg_size);
211 else if (mips_regsize (current_gdbarch) == 4 &&
212 core_reg_size == (2 * mips_regsize (current_gdbarch)) * NUM_REGS)
214 /* This is a core file from a N32 executable, 64 bits are saved
215 for all registers. */
216 char *srcp = core_reg_sect;
217 char *dstp = deprecated_registers;
220 for (regno = 0; regno < NUM_REGS; regno++)
222 if (regno >= FP0_REGNUM && regno < (FP0_REGNUM + 32))
224 /* FIXME, this is wrong, N32 has 64 bit FP regs, but GDB
225 currently assumes that they are 32 bit. */
230 if (DEPRECATED_REGISTER_RAW_SIZE (regno) == 4)
232 /* copying 4 bytes from eight bytes?
233 I don't see how this can be right... */
238 /* copy all 8 bytes (sizeof(double)) */
257 warning ("wrong size gregset struct in core file");
261 deprecated_registers_fetched ();
264 /* Register that we are able to handle irix5 core file formats.
265 This really is bfd_target_unknown_flavour */
267 static struct core_fns irix5_core_fns =
269 bfd_target_unknown_flavour, /* core_flavour */
270 default_check_format, /* check_format */
271 default_core_sniffer, /* core_sniffer */
272 fetch_core_registers, /* core_read_registers */
277 _initialize_core_irix5 (void)
279 add_core_fns (&irix5_core_fns);