From d3225ea0acbf8000c86126e1196cf1ed25516041 Mon Sep 17 00:00:00 2001 From: Stu Grossman Date: Wed, 17 Nov 1993 07:17:45 +0000 Subject: [PATCH] * i386ly-nat.c, i386lynx-nat.c, m68kly-nat.c: Remove. Move common code into lynx-nat.c. * lynx-nat.c: New module. Contains portable code for Lynx native stuff (mostly ptrace related). * config/i386/i386lynx.mh (NATDEPFILES): i386ly-nat.o -> lynx-nat.o * config/m68k/m68klynx.mh (NATDEPFILES): i386ly-nat.o -> lynx-nat.o * config/nm-lynx.h, config/tm-lynx.h: New files to contain non-architecture specific native and target defs. * config/i386/nm-i386lynx.h, config/i386/tm-i386lynx.h, config/m68k/nm-m68klynx.h, config/m68k/tm-m68klynx.h: Move all (arch) portable stuff into ../{tm nm}-lynx.h. --- gdb/lynx-nat.c | 310 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 310 insertions(+) create mode 100644 gdb/lynx-nat.c diff --git a/gdb/lynx-nat.c b/gdb/lynx-nat.c new file mode 100644 index 00000000000..8b2c7c8fa9a --- /dev/null +++ b/gdb/lynx-nat.c @@ -0,0 +1,310 @@ +/* Native-dependent code for LynxOS. + Copyright 1993 Free Software Foundation, Inc. + +This file is part of GDB. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include "defs.h" +#include "frame.h" +#include "inferior.h" +#include "target.h" + +#include +#include "/usr/include/sys/wait.h" + +static unsigned long registers_addr PARAMS ((int pid)); + +#define X(ENTRY)(offsetof(struct econtext, ENTRY)) + +#ifdef I386 +/* Mappings from tm-i386v.h */ + +static int regmap[] = +{ + X(eax), + X(ecx), + X(edx), + X(ebx), + X(esp), /* sp */ + X(ebp), /* fp */ + X(esi), + X(edi), + X(eip), /* pc */ + X(flags), /* ps */ + X(cs), + X(ss), + X(ds), + X(es), + X(ecode), /* Lynx doesn't give us either fs or gs, so */ + X(fault), /* we just substitute these two in the hopes + that they are useful. */ +}; +#endif + +#ifdef M68K +/* Mappings from tm-m68k.h */ + +static int regmap[] = +{ + X(regs[0]), /* d0 */ + X(regs[1]), /* d1 */ + X(regs[2]), /* d2 */ + X(regs[3]), /* d3 */ + X(regs[4]), /* d4 */ + X(regs[5]), /* d5 */ + X(regs[6]), /* d6 */ + X(regs[7]), /* d7 */ + X(regs[8]), /* a0 */ + X(regs[9]), /* a1 */ + X(regs[10]), /* a2 */ + X(regs[11]), /* a3 */ + X(regs[12]), /* a4 */ + X(regs[13]), /* a5 */ + X(regs[14]), /* fp */ + offsetof (st_t, usp) - offsetof (st_t, ec), /* sp */ + X(status), /* ps */ + X(pc), + + X(fregs[0*3]), /* fp0 */ + X(fregs[1*3]), /* fp1 */ + X(fregs[2*3]), /* fp2 */ + X(fregs[3*3]), /* fp3 */ + X(fregs[4*3]), /* fp4 */ + X(fregs[5*3]), /* fp5 */ + X(fregs[6*3]), /* fp6 */ + X(fregs[7*3]), /* fp7 */ + + X(fcregs[0]), /* fpcontrol */ + X(fcregs[1]), /* fpstatus */ + X(fcregs[2]), /* fpiaddr */ + X(ssw), /* fpcode */ + X(fault), /* fpflags */ +}; +#endif + +/* Return the offset relative to the start of the per-thread data to the + saved context block. */ + +static unsigned long +registers_addr(pid) + int pid; +{ + CORE_ADDR stblock; + int ecpoff = offsetof(st_t, ecp); + CORE_ADDR ecp; + + errno = 0; + stblock = (CORE_ADDR) ptrace (PTRACE_THREADUSER, pid, (PTRACE_ARG3_TYPE)0, + 0); + if (errno) + perror_with_name ("registers_addr(PTRACE_THREADUSER)"); + + ecp = (CORE_ADDR) ptrace (PTRACE_PEEKTHREAD, pid, (PTRACE_ARG3_TYPE)ecpoff, + 0); + if (errno) + perror_with_name ("registers_addr(PTRACE_PEEKTHREAD)"); + + return ecp - stblock; +} + +/* Fetch one or more registers from the inferior. REGNO == -1 to get + them all. We actually fetch more than requested, when convenient, + marking them as valid so we won't fetch them again. */ + +void +fetch_inferior_registers (regno) + int regno; +{ + int reglo, reghi; + int i; + unsigned long ecp; + + if (regno == -1) + { + reglo = 0; + reghi = NUM_REGS - 1; + } + else + reglo = reghi = regno; + + ecp = registers_addr (inferior_pid); + + for (regno = reglo; regno <= reghi; regno++) + { + char buf[MAX_REGISTER_RAW_SIZE]; + int ptrace_fun = PTRACE_PEEKTHREAD; + +#ifdef PTRACE_PEEKUSP + ptrace_fun = regno == SP_REGNUM ? PTRACE_PEEKUSP : PTRACE_PEEKTHREAD; +#endif + + for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int)) + { + unsigned int reg; + + errno = 0; + reg = ptrace (ptrace_fun, inferior_pid, + (PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), 0); + if (errno) + perror_with_name ("fetch_inferior_registers(ptrace)"); + + *(int *)&buf[i] = reg; + } + supply_register (regno, buf); + } +} + +/* Store our register values back into the inferior. + If REGNO is -1, do this for all registers. + Otherwise, REGNO specifies which register (so we can save time). */ + +void +store_inferior_registers (regno) + int regno; +{ + int reglo, reghi; + int i; + unsigned long ecp; + + if (regno == -1) + { + reglo = 0; + reghi = NUM_REGS - 1; + } + else + reglo = reghi = regno; + + ecp = registers_addr (inferior_pid); + + for (regno = reglo; regno <= reghi; regno++) + { + int ptrace_fun = PTRACE_POKEUSER; + +#ifdef PTRACE_POKEUSP + ptrace_fun = regno == SP_REGNUM ? PTRACE_POKEUSP : PTRACE_POKEUSER; +#endif + + for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int)) + { + unsigned int reg; + + reg = *(unsigned int *)®isters[REGISTER_BYTE (regno) + i]; + + errno = 0; + ptrace (ptrace_fun, inferior_pid, + (PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), reg); + if (errno) + perror_with_name ("PTRACE_POKEUSER"); + } + } +} + +/* Wait for child to do something. Return pid of child, or -1 in case + of error; store status through argument pointer STATUS. */ + +int +child_wait (pid, status) + int pid; + int *status; +{ + int save_errno; + int thread; + + while (1) + { + int sig; + + if (attach_flag) + set_sigint_trap(); /* Causes SIGINT to be passed on to the + attached process. */ + pid = wait (status); + save_errno = errno; + + if (attach_flag) + clear_sigint_trap(); + + if (pid == -1) + { + if (save_errno == EINTR) + continue; + fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n", + safe_strerror (save_errno)); + *status = 42; /* Claim it exited with signal 42 */ + return -1; + } + + if (pid != PIDGET (inferior_pid)) /* Some other process?!? */ + continue; + +/* thread = WIFTID (*status);*/ + thread = *status >> 16; + + /* Initial thread value can only be acquired via wait, so we have to + resort to this hack. */ + + if (TIDGET (inferior_pid) == 0) + { + inferior_pid = BUILDPID (inferior_pid, thread); + add_thread (inferior_pid); + } + + pid = BUILDPID (pid, thread); + + return pid; + } +} + +/* Convert a Lynx process ID to a string. Returns the string in a static + buffer. */ + +char * +lynx_pid_to_str (pid) + int pid; +{ + static char buf[40]; + + sprintf (buf, "process %d thread %d", PIDGET (pid), TIDGET (pid)); + + return buf; +} + +/* Extract the register values out of the core file and store + them where `read_register' will find them. + + CORE_REG_SECT points to the register values themselves, read into memory. + CORE_REG_SIZE is the size of that area. + WHICH says which set of registers we are handling (0 = int, 2 = float + on machines where they are discontiguous). + REG_ADDR is the offset from u.u_ar0 to the register values relative to + core_reg_sect. This is used with old-fashioned core files to + locate the registers in a large upage-plus-stack ".reg" section. + Original upage address X is at location core_reg_sect+x+reg_addr. + */ + +void +fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) + char *core_reg_sect; + unsigned core_reg_size; + int which; + unsigned reg_addr; +{ + struct st_entry s; + unsigned int regno; + + for (regno = 0; regno < NUM_REGS; regno++) + supply_register (regno, core_reg_sect + offsetof (st_t, ec) + + regmap[regno]); +} -- 2.30.2