1 /* Native support for the SGI Iris running IRIX version 5, for GDB.
3 Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
4 1998, 1999, 2000, 2001, 2002, 2004 Free Software Foundation, Inc.
6 Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
7 and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
8 Implemented for Irix 4.x by Garrett A. Wollman.
9 Modified for Irix 5.x by Ian Lance Taylor.
11 This file is part of GDB.
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 59 Temple Place - Suite 330,
26 Boston, MA 02111-1307, USA. */
34 #include "gdb_string.h"
36 #include <sys/procfs.h>
37 #include <setjmp.h> /* For JB_XXX. */
39 /* Prototypes for supply_gregset etc. */
41 #include "mips-tdep.h"
43 static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR);
45 /* Size of elements in jmpbuf */
47 #define JB_ELEMENT_SIZE 4
50 * See the comment in m68k-tdep.c regarding the utility of these functions.
52 * These definitions are from the MIPS SVR4 ABI, so they may work for
53 * any MIPS SVR4 target.
57 supply_gregset (gregset_t *gregsetp)
60 greg_t *regp = &(*gregsetp)[0];
61 int gregoff = sizeof (greg_t) - mips_isa_regsize (current_gdbarch);
62 static char zerobuf[32] = {0};
64 for (regi = 0; regi <= CTX_RA; regi++)
65 regcache_raw_supply (current_regcache, regi,
66 (char *) (regp + regi) + gregoff);
68 regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->pc,
69 (char *) (regp + CTX_EPC) + gregoff);
70 regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->hi,
71 (char *) (regp + CTX_MDHI) + gregoff);
72 regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->lo,
73 (char *) (regp + CTX_MDLO) + gregoff);
74 regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->cause,
75 (char *) (regp + CTX_CAUSE) + gregoff);
77 /* Fill inaccessible registers with zero. */
78 regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->badvaddr, zerobuf);
82 fill_gregset (gregset_t *gregsetp, int regno)
85 greg_t *regp = &(*gregsetp)[0];
87 /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32
88 executable, we have to sign extend the registers to 64 bits before
89 filling in the gregset structure. */
91 for (regi = 0; regi <= CTX_RA; regi++)
92 if ((regno == -1) || (regno == regi))
94 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)],
95 register_size (current_gdbarch, regi));
97 if ((regno == -1) || (regno == PC_REGNUM))
99 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)],
100 register_size (current_gdbarch, mips_regnum (current_gdbarch)->pc));
102 if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->cause))
103 *(regp + CTX_CAUSE) =
104 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->cause)],
105 register_size (current_gdbarch, mips_regnum (current_gdbarch)->cause));
108 || (regno == mips_regnum (current_gdbarch)->hi))
110 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)],
111 register_size (current_gdbarch, mips_regnum (current_gdbarch)->hi));
113 if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->lo))
115 extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)],
116 register_size (current_gdbarch, mips_regnum (current_gdbarch)->lo));
120 * Now we do the same thing for floating-point registers.
121 * We don't bother to condition on FP0_REGNUM since any
122 * reasonable MIPS configuration has an R3010 in it.
124 * Again, see the comments in m68k-tdep.c.
128 supply_fpregset (fpregset_t *fpregsetp)
131 static char zerobuf[32] = {0};
133 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
135 for (regi = 0; regi < 32; regi++)
136 regcache_raw_supply (current_regcache, FP0_REGNUM + regi,
137 (char *) &fpregsetp->fp_r.fp_regs[regi]);
139 regcache_raw_supply (current_regcache,
140 mips_regnum (current_gdbarch)->fp_control_status,
141 (char *) &fpregsetp->fp_csr);
143 /* FIXME: how can we supply FCRIR? SGI doesn't tell us. */
144 regcache_raw_supply (current_regcache,
145 mips_regnum (current_gdbarch)->fp_implementation_revision,
150 fill_fpregset (fpregset_t *fpregsetp, int regno)
155 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
157 for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
159 if ((regno == -1) || (regno == regi))
161 from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)];
162 to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]);
163 memcpy (to, from, register_size (current_gdbarch, regi));
168 || (regno == mips_regnum (current_gdbarch)->fp_control_status))
169 fpregsetp->fp_csr = *(unsigned *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)];
173 /* Figure out where the longjmp will land.
174 We expect the first arg to be a pointer to the jmp_buf structure from which
175 we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
176 This routine returns true on success. */
179 get_longjmp_target (CORE_ADDR *pc)
184 buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT);
185 jb_addr = read_register (A0_REGNUM);
187 if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
188 TARGET_PTR_BIT / TARGET_CHAR_BIT))
191 *pc = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
196 /* Provide registers to GDB from a core file.
198 CORE_REG_SECT points to an array of bytes, which were obtained from
199 a core file which BFD thinks might contain register contents.
200 CORE_REG_SIZE is its size.
202 Normally, WHICH says which register set corelow suspects this is:
203 0 --- the general-purpose register set
204 2 --- the floating-point register set
205 However, for Irix 5, WHICH isn't used.
207 REG_ADDR is also unused. */
210 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
211 int which, CORE_ADDR reg_addr)
213 if (core_reg_size == deprecated_register_bytes ())
215 memcpy ((char *) deprecated_registers, core_reg_sect, core_reg_size);
217 else if (mips_isa_regsize (current_gdbarch) == 4 &&
218 core_reg_size == (2 * mips_isa_regsize (current_gdbarch)) * NUM_REGS)
220 /* This is a core file from a N32 executable, 64 bits are saved
221 for all registers. */
222 char *srcp = core_reg_sect;
223 char *dstp = deprecated_registers;
226 for (regno = 0; regno < NUM_REGS; regno++)
228 if (regno >= FP0_REGNUM && regno < (FP0_REGNUM + 32))
230 /* FIXME, this is wrong, N32 has 64 bit FP regs, but GDB
231 currently assumes that they are 32 bit. */
236 if (register_size (current_gdbarch, regno) == 4)
238 /* copying 4 bytes from eight bytes?
239 I don't see how this can be right... */
244 /* copy all 8 bytes (sizeof(double)) */
263 warning ("wrong size gregset struct in core file");
267 deprecated_registers_fetched ();
270 /* Register that we are able to handle irix5 core file formats.
271 This really is bfd_target_unknown_flavour */
273 static struct core_fns irix5_core_fns =
275 bfd_target_unknown_flavour, /* core_flavour */
276 default_check_format, /* check_format */
277 default_core_sniffer, /* core_sniffer */
278 fetch_core_registers, /* core_read_registers */
283 _initialize_core_irix5 (void)
285 deprecated_add_core_fns (&irix5_core_fns);