1 /* Native support for the SGI Iris running IRIX version 5, for GDB.
3 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998,
4 1999, 2000, 2001, 2002, 2004, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
8 and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
9 Implemented for Irix 4.x by Garrett A. Wollman.
10 Modified for Irix 5.x by Ian Lance Taylor.
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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 (struct regcache *, char *,
44 unsigned int, int, CORE_ADDR);
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 (struct regcache *regcache, const gregset_t *gregsetp)
58 const greg_t *regp = &(*gregsetp)[0];
59 struct gdbarch *gdbarch = get_regcache_arch (regcache);
60 int gregoff = sizeof (greg_t) - mips_isa_regsize (gdbarch);
61 static char zerobuf[32] = {0};
63 for (regi = 0; regi <= CTX_RA; regi++)
64 regcache_raw_supply (regcache, regi,
65 (const char *) (regp + regi) + gregoff);
67 regcache_raw_supply (regcache, mips_regnum (gdbarch)->pc,
68 (const char *) (regp + CTX_EPC) + gregoff);
69 regcache_raw_supply (regcache, mips_regnum (gdbarch)->hi,
70 (const char *) (regp + CTX_MDHI) + gregoff);
71 regcache_raw_supply (regcache, mips_regnum (gdbarch)->lo,
72 (const char *) (regp + CTX_MDLO) + gregoff);
73 regcache_raw_supply (regcache, mips_regnum (gdbarch)->cause,
74 (const char *) (regp + CTX_CAUSE) + gregoff);
76 /* Fill inaccessible registers with zero. */
77 regcache_raw_supply (regcache, mips_regnum (gdbarch)->badvaddr, zerobuf);
81 fill_gregset (const struct regcache *regcache, gregset_t *gregsetp, int regno)
84 greg_t *regp = &(*gregsetp)[0];
85 gdb_byte buf[MAX_REGISTER_SIZE];
86 struct gdbarch *gdbarch = get_regcache_arch (regcache);
87 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
89 /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32
90 executable, we have to sign extend the registers to 64 bits before
91 filling in the gregset structure. */
93 for (regi = 0; regi <= CTX_RA; regi++)
94 if ((regno == -1) || (regno == regi))
96 size = register_size (gdbarch, regi);
97 regcache_raw_collect (regcache, regi, buf);
98 *(regp + regi) = extract_signed_integer (buf, size, byte_order);
101 if ((regno == -1) || (regno == mips_regnum (gdbarch)->pc))
103 regi = mips_regnum (gdbarch)->pc;
104 size = register_size (gdbarch, regi);
105 regcache_raw_collect (regcache, regi, buf);
106 *(regp + CTX_EPC) = extract_signed_integer (buf, size, byte_order);
109 if ((regno == -1) || (regno == mips_regnum (gdbarch)->cause))
111 regi = mips_regnum (gdbarch)->cause;
112 size = register_size (gdbarch, regi);
113 regcache_raw_collect (regcache, regi, buf);
114 *(regp + CTX_CAUSE) = extract_signed_integer (buf, size, byte_order);
117 if ((regno == -1) || (regno == mips_regnum (gdbarch)->hi))
119 regi = mips_regnum (gdbarch)->hi;
120 size = register_size (gdbarch, regi);
121 regcache_raw_collect (regcache, regi, buf);
122 *(regp + CTX_MDHI) = extract_signed_integer (buf, size, byte_order);
125 if ((regno == -1) || (regno == mips_regnum (gdbarch)->lo))
127 regi = mips_regnum (gdbarch)->lo;
128 size = register_size (gdbarch, regi);
129 regcache_raw_collect (regcache, regi, buf);
130 *(regp + CTX_MDLO) = extract_signed_integer (buf, size, byte_order);
135 * Now we do the same thing for floating-point registers.
136 * We don't bother to condition on gdbarch_fp0_regnum since any
137 * reasonable MIPS configuration has an R3010 in it.
139 * Again, see the comments in m68k-tdep.c.
143 supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp)
146 static char zerobuf[32] = {0};
148 struct gdbarch *gdbarch = get_regcache_arch (regcache);
150 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
152 for (regi = 0; regi < 32; regi++)
153 regcache_raw_supply (regcache, gdbarch_fp0_regnum (gdbarch) + regi,
154 (const char *) &fpregsetp->fp_r.fp_regs[regi]);
156 /* We can't supply the FSR register directly to the regcache,
157 because there is a size issue: On one hand, fpregsetp->fp_csr
158 is 32bits long, while the regcache expects a 64bits long value.
159 So we use a buffer of the correct size and copy into it the register
160 value at the proper location. */
161 memset (fsrbuf, 0, 4);
162 memcpy (fsrbuf + 4, &fpregsetp->fp_csr, 4);
164 regcache_raw_supply (regcache,
165 mips_regnum (gdbarch)->fp_control_status, fsrbuf);
167 /* FIXME: how can we supply FCRIR? SGI doesn't tell us. */
168 regcache_raw_supply (regcache,
169 mips_regnum (gdbarch)->fp_implementation_revision,
174 fill_fpregset (const struct regcache *regcache, fpregset_t *fpregsetp, int regno)
178 struct gdbarch *gdbarch = get_regcache_arch (regcache);
180 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
182 for (regi = gdbarch_fp0_regnum (gdbarch);
183 regi < gdbarch_fp0_regnum (gdbarch) + 32; regi++)
185 if ((regno == -1) || (regno == regi))
187 to = (char *) &(fpregsetp->fp_r.fp_regs[regi - gdbarch_fp0_regnum
189 regcache_raw_collect (regcache, regi, to);
194 || regno == mips_regnum (gdbarch)->fp_control_status)
198 /* We can't fill the FSR register directly from the regcache,
199 because there is a size issue: On one hand, fpregsetp->fp_csr
200 is 32bits long, while the regcache expects a 64bits long buffer.
201 So we use a buffer of the correct size and copy the register
202 value from that buffer. */
203 regcache_raw_collect (regcache,
204 mips_regnum (gdbarch)->fp_control_status, fsrbuf);
206 memcpy (&fpregsetp->fp_csr, fsrbuf + 4, 4);
211 /* Provide registers to GDB from a core file.
213 CORE_REG_SECT points to an array of bytes, which were obtained from
214 a core file which BFD thinks might contain register contents.
215 CORE_REG_SIZE is its size.
217 Normally, WHICH says which register set corelow suspects this is:
218 0 --- the general-purpose register set
219 2 --- the floating-point register set
220 However, for Irix 5, WHICH isn't used.
222 REG_ADDR is also unused. */
225 fetch_core_registers (struct regcache *regcache,
226 char *core_reg_sect, unsigned core_reg_size,
227 int which, CORE_ADDR reg_addr)
229 char *srcp = core_reg_sect;
230 struct gdbarch *gdbarch = get_regcache_arch (regcache);
231 int regsize = mips_isa_regsize (gdbarch);
234 /* If regsize is 8, this is a N32 or N64 core file.
235 If regsize is 4, this is an O32 core file. */
236 if (core_reg_size != regsize * gdbarch_num_regs (gdbarch))
238 warning (_("wrong size gregset struct in core file"));
242 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
244 regcache_raw_supply (regcache, regno, srcp);
249 /* Register that we are able to handle irix5 core file formats.
250 This really is bfd_target_unknown_flavour */
252 static struct core_fns irix5_core_fns =
254 bfd_target_unknown_flavour, /* core_flavour */
255 default_check_format, /* check_format */
256 default_core_sniffer, /* core_sniffer */
257 fetch_core_registers, /* core_read_registers */
261 /* Provide a prototype to silence -Wmissing-prototypes. */
262 extern initialize_file_ftype _initialize_irix5_nat;
265 _initialize_irix5_nat (void)
267 struct target_ops *t;
269 t = procfs_target ();
270 procfs_use_watchpoints (t);
273 deprecated_add_core_fns (&irix5_core_fns);