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. */
39 #include "mips-tdep.h"
41 static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR);
43 /* Size of elements in jmpbuf */
45 #define JB_ELEMENT_SIZE 4
48 * See the comment in m68k-tdep.c regarding the utility of these functions.
50 * These definitions are from the MIPS SVR4 ABI, so they may work for
51 * any MIPS SVR4 target.
55 supply_gregset (gregset_t *gregsetp)
58 greg_t *regp = &(*gregsetp)[0];
59 int gregoff = sizeof (greg_t) - mips_regsize (current_gdbarch);
60 static char zerobuf[32] = {0};
62 for (regi = 0; regi <= CTX_RA; regi++)
63 supply_register (regi, (char *) (regp + regi) + gregoff);
65 supply_register (mips_regnum (current_gdbarch)->pc,
66 (char *) (regp + CTX_EPC) + gregoff);
67 supply_register (mips_regnum (current_gdbarch)->hi,
68 (char *) (regp + CTX_MDHI) + gregoff);
69 supply_register (mips_regnum (current_gdbarch)->lo,
70 (char *) (regp + CTX_MDLO) + gregoff);
71 supply_register (mips_regnum (current_gdbarch)->cause,
72 (char *) (regp + CTX_CAUSE) + gregoff);
74 /* Fill inaccessible registers with zero. */
75 supply_register (mips_regnum (current_gdbarch)->badvaddr, zerobuf);
79 fill_gregset (gregset_t *gregsetp, int regno)
82 greg_t *regp = &(*gregsetp)[0];
84 /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32
85 executable, we have to sign extend the registers to 64 bits before
86 filling in the gregset structure. */
88 for (regi = 0; regi <= CTX_RA; regi++)
89 if ((regno == -1) || (regno == regi))
91 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)],
92 DEPRECATED_REGISTER_RAW_SIZE (regi));
94 if ((regno == -1) || (regno == PC_REGNUM))
96 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)],
97 DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->pc));
99 if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->cause))
100 *(regp + CTX_CAUSE) =
101 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->cause)],
102 DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->cause));
105 || (regno == mips_regnum (current_gdbarch)->hi))
107 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)],
108 DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->hi));
110 if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->lo))
112 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)],
113 DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->lo));
117 * Now we do the same thing for floating-point registers.
118 * We don't bother to condition on FP0_REGNUM since any
119 * reasonable MIPS configuration has an R3010 in it.
121 * Again, see the comments in m68k-tdep.c.
125 supply_fpregset (fpregset_t *fpregsetp)
128 static char zerobuf[32] = {0};
130 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
132 for (regi = 0; regi < 32; regi++)
133 supply_register (FP0_REGNUM + regi,
134 (char *) &fpregsetp->fp_r.fp_regs[regi]);
136 supply_register (mips_regnum (current_gdbarch)->fp_control_status,
137 (char *) &fpregsetp->fp_csr);
139 /* FIXME: how can we supply FCRIR? SGI doesn't tell us. */
140 supply_register (mips_regnum (current_gdbarch)->fp_implementation_revision,
145 fill_fpregset (fpregset_t *fpregsetp, int regno)
150 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
152 for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
154 if ((regno == -1) || (regno == regi))
156 from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)];
157 to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]);
158 memcpy (to, from, DEPRECATED_REGISTER_RAW_SIZE (regi));
163 || (regno == mips_regnum (current_gdbarch)->fp_control_status))
164 fpregsetp->fp_csr = *(unsigned *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)];
168 /* Figure out where the longjmp will land.
169 We expect the first arg to be a pointer to the jmp_buf structure from which
170 we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
171 This routine returns true on success. */
174 get_longjmp_target (CORE_ADDR *pc)
179 buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT);
180 jb_addr = read_register (A0_REGNUM);
182 if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
183 TARGET_PTR_BIT / TARGET_CHAR_BIT))
186 *pc = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
191 /* Provide registers to GDB from a core file.
193 CORE_REG_SECT points to an array of bytes, which were obtained from
194 a core file which BFD thinks might contain register contents.
195 CORE_REG_SIZE is its size.
197 Normally, WHICH says which register set corelow suspects this is:
198 0 --- the general-purpose register set
199 2 --- the floating-point register set
200 However, for Irix 5, WHICH isn't used.
202 REG_ADDR is also unused. */
205 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
206 int which, CORE_ADDR reg_addr)
208 if (core_reg_size == DEPRECATED_REGISTER_BYTES)
210 memcpy ((char *) deprecated_registers, core_reg_sect, core_reg_size);
212 else if (mips_regsize (current_gdbarch) == 4 &&
213 core_reg_size == (2 * mips_regsize (current_gdbarch)) * NUM_REGS)
215 /* This is a core file from a N32 executable, 64 bits are saved
216 for all registers. */
217 char *srcp = core_reg_sect;
218 char *dstp = deprecated_registers;
221 for (regno = 0; regno < NUM_REGS; regno++)
223 if (regno >= FP0_REGNUM && regno < (FP0_REGNUM + 32))
225 /* FIXME, this is wrong, N32 has 64 bit FP regs, but GDB
226 currently assumes that they are 32 bit. */
231 if (DEPRECATED_REGISTER_RAW_SIZE (regno) == 4)
233 /* copying 4 bytes from eight bytes?
234 I don't see how this can be right... */
239 /* copy all 8 bytes (sizeof(double)) */
258 warning ("wrong size gregset struct in core file");
262 deprecated_registers_fetched ();
265 /* Register that we are able to handle irix5 core file formats.
266 This really is bfd_target_unknown_flavour */
268 static struct core_fns irix5_core_fns =
270 bfd_target_unknown_flavour, /* core_flavour */
271 default_check_format, /* check_format */
272 default_core_sniffer, /* core_sniffer */
273 fetch_core_registers, /* core_read_registers */
278 _initialize_core_irix5 (void)
280 add_core_fns (&irix5_core_fns);