1 /* Native-dependent code for LynxOS.
2 Copyright 1993, 1994 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
25 #include <sys/ptrace.h>
28 static unsigned long registers_addr PARAMS ((int pid));
30 #define X(ENTRY)(offsetof(struct econtext, ENTRY))
33 /* Mappings from tm-i386v.h */
51 X(ecode), /* Lynx doesn't give us either fs or gs, so */
52 X(fault), /* we just substitute these two in the hopes
53 that they are useful. */
58 /* Mappings from tm-m68k.h */
77 offsetof (st_t, usp) - offsetof (st_t, ec), /* sp */
81 X(fregs[0*3]), /* fp0 */
82 X(fregs[1*3]), /* fp1 */
83 X(fregs[2*3]), /* fp2 */
84 X(fregs[3*3]), /* fp3 */
85 X(fregs[4*3]), /* fp4 */
86 X(fregs[5*3]), /* fp5 */
87 X(fregs[6*3]), /* fp6 */
88 X(fregs[7*3]), /* fp7 */
90 X(fcregs[0]), /* fpcontrol */
91 X(fcregs[1]), /* fpstatus */
92 X(fcregs[2]), /* fpiaddr */
94 X(fault), /* fpflags */
98 /* Return the offset relative to the start of the per-thread data to the
99 saved context block. */
106 int ecpoff = offsetof(st_t, ecp);
110 stblock = (CORE_ADDR) ptrace (PTRACE_THREADUSER, pid, (PTRACE_ARG3_TYPE)0,
113 perror_with_name ("registers_addr(PTRACE_THREADUSER)");
115 ecp = (CORE_ADDR) ptrace (PTRACE_PEEKTHREAD, pid, (PTRACE_ARG3_TYPE)ecpoff,
118 perror_with_name ("registers_addr(PTRACE_PEEKTHREAD)");
120 return ecp - stblock;
123 /* Fetch one or more registers from the inferior. REGNO == -1 to get
124 them all. We actually fetch more than requested, when convenient,
125 marking them as valid so we won't fetch them again. */
128 fetch_inferior_registers (regno)
138 reghi = NUM_REGS - 1;
141 reglo = reghi = regno;
143 ecp = registers_addr (inferior_pid);
145 for (regno = reglo; regno <= reghi; regno++)
147 char buf[MAX_REGISTER_RAW_SIZE];
148 int ptrace_fun = PTRACE_PEEKTHREAD;
150 #ifdef PTRACE_PEEKUSP
151 ptrace_fun = regno == SP_REGNUM ? PTRACE_PEEKUSP : PTRACE_PEEKTHREAD;
154 for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
159 reg = ptrace (ptrace_fun, inferior_pid,
160 (PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), 0);
162 perror_with_name ("fetch_inferior_registers(ptrace)");
164 *(int *)&buf[i] = reg;
166 supply_register (regno, buf);
170 /* Store our register values back into the inferior.
171 If REGNO is -1, do this for all registers.
172 Otherwise, REGNO specifies which register (so we can save time). */
175 store_inferior_registers (regno)
185 reghi = NUM_REGS - 1;
188 reglo = reghi = regno;
190 ecp = registers_addr (inferior_pid);
192 for (regno = reglo; regno <= reghi; regno++)
194 int ptrace_fun = PTRACE_POKEUSER;
196 #ifdef PTRACE_POKEUSP
197 ptrace_fun = regno == SP_REGNUM ? PTRACE_POKEUSP : PTRACE_POKEUSER;
200 for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
204 reg = *(unsigned int *)®isters[REGISTER_BYTE (regno) + i];
207 ptrace (ptrace_fun, inferior_pid,
208 (PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), reg);
210 perror_with_name ("PTRACE_POKEUSER");
215 /* Wait for child to do something. Return pid of child, or -1 in case
216 of error; store status through argument pointer OURSTATUS. */
219 child_wait (pid, ourstatus)
221 struct target_waitstatus *ourstatus;
232 set_sigint_trap(); /* Causes SIGINT to be passed on to the
242 if (save_errno == EINTR)
244 fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n",
245 safe_strerror (save_errno));
246 /* Claim it exited with unknown signal. */
247 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
248 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
252 if (pid != PIDGET (inferior_pid)) /* Some other process?!? */
255 /* thread = WIFTID (status);*/
256 thread = status >> 16;
258 /* Initial thread value can only be acquired via wait, so we have to
259 resort to this hack. */
261 if (TIDGET (inferior_pid) == 0)
263 inferior_pid = BUILDPID (inferior_pid, thread);
264 add_thread (inferior_pid);
267 pid = BUILDPID (pid, thread);
269 store_waitstatus (ourstatus, status);
275 /* Convert a Lynx process ID to a string. Returns the string in a static
279 lynx_pid_to_str (pid)
284 sprintf (buf, "process %d thread %d", PIDGET (pid), TIDGET (pid));
289 /* Extract the register values out of the core file and store
290 them where `read_register' will find them.
292 CORE_REG_SECT points to the register values themselves, read into memory.
293 CORE_REG_SIZE is the size of that area.
294 WHICH says which set of registers we are handling (0 = int, 2 = float
295 on machines where they are discontiguous).
296 REG_ADDR is the offset from u.u_ar0 to the register values relative to
297 core_reg_sect. This is used with old-fashioned core files to
298 locate the registers in a large upage-plus-stack ".reg" section.
299 Original upage address X is at location core_reg_sect+x+reg_addr.
303 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
305 unsigned core_reg_size;
312 for (regno = 0; regno < NUM_REGS; regno++)
313 supply_register (regno, core_reg_sect + offsetof (st_t, ec)