diff options
Diffstat (limited to 'gdb/gdbserver/low-lynx.c')
| -rw-r--r-- | gdb/gdbserver/low-lynx.c | 745 |
1 files changed, 0 insertions, 745 deletions
diff --git a/gdb/gdbserver/low-lynx.c b/gdb/gdbserver/low-lynx.c deleted file mode 100644 index 90e18db..0000000 --- a/gdb/gdbserver/low-lynx.c +++ /dev/null @@ -1,745 +0,0 @@ -/* Low level interface to ptrace, for the remote server for GDB. - Copyright 1986, 1987, 1993, 1994, 1995, 1999, 2000, 2001, 2002 - 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., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include "server.h" -#include "frame.h" -#include "inferior.h" - -#include <stdio.h> -#include <sys/param.h> -#include <sys/dir.h> -#define LYNXOS -#include <sys/mem.h> -#include <sys/signal.h> -#include <sys/file.h> -#include <sys/kernel.h> -#ifndef __LYNXOS -#define __LYNXOS -#endif -#include <sys/itimer.h> -#include <sys/time.h> -#include <sys/resource.h> -#include <sys/proc.h> -#include <signal.h> -#include <sys/ioctl.h> -#include <sgtty.h> -#include <fcntl.h> -#include <sys/wait.h> -#include <sys/fpp.h> - -static char my_registers[REGISTER_BYTES]; -char *registers = my_registers; - -#include <sys/ptrace.h> - -/* Start an inferior process and returns its pid. - ALLARGS is a vector of program-name and args. */ - -int -create_inferior (char *program, char **allargs) -{ - int pid; - - pid = fork (); - if (pid < 0) - perror_with_name ("fork"); - - if (pid == 0) - { - int pgrp; - - /* Switch child to it's own process group so that signals won't - directly affect gdbserver. */ - - pgrp = getpid (); - setpgrp (0, pgrp); - ioctl (0, TIOCSPGRP, &pgrp); - - ptrace (PTRACE_TRACEME, 0, (PTRACE_ARG3_TYPE) 0, 0); - - execv (program, allargs); - - fprintf (stderr, "GDBserver (process %d): Cannot exec %s: %s.\n", - getpid (), program, - errno < sys_nerr ? sys_errlist[errno] : "unknown error"); - fflush (stderr); - _exit (0177); - } - - return pid; -} - -/* Attaching is not supported. */ -int -myattach (int pid) -{ - return -1; -} - -/* Kill the inferior process. Make us have no inferior. */ - -void -kill_inferior (void) -{ - if (inferior_pid == 0) - return; - ptrace (PTRACE_KILL, inferior_pid, 0, 0); - wait (0); - - inferior_pid = 0; -} - -/* Return nonzero if the given thread is still alive. */ -int -mythread_alive (int pid) -{ - /* Arggh. Apparently pthread_kill only works for threads within - the process that calls pthread_kill. - - We want to avoid the lynx signal extensions as they simply don't - map well to the generic gdb interface we want to keep. - - All we want to do is determine if a particular thread is alive; - it appears as if we can just make a harmless thread specific - ptrace call to do that. */ - return (ptrace (PTRACE_THREADUSER, - BUILDPID (PIDGET (inferior_pid), pid), 0, 0) != -1); -} - -/* Wait for process, returns status */ - -unsigned char -mywait (char *status) -{ - int pid; - union wait w; - - while (1) - { - enable_async_io (); - - pid = wait (&w); - - disable_async_io (); - - if (pid != PIDGET (inferior_pid)) - perror_with_name ("wait"); - - thread_from_wait = w.w_tid; - inferior_pid = BUILDPID (inferior_pid, w.w_tid); - - if (WIFSTOPPED (w) - && WSTOPSIG (w) == SIGTRAP) - { - int realsig; - - realsig = ptrace (PTRACE_GETTRACESIG, inferior_pid, - (PTRACE_ARG3_TYPE) 0, 0); - - if (realsig == SIGNEWTHREAD) - { - /* It's a new thread notification. Nothing to do here since - the machine independent code in wait_for_inferior will - add the thread to the thread list and restart the thread - when pid != inferior_pid and pid is not in the thread list. - We don't even want to muck with realsig -- the code in - wait_for_inferior expects SIGTRAP. */ - ; - } - } - break; - } - - if (WIFEXITED (w)) - { - *status = 'W'; - return ((unsigned char) WEXITSTATUS (w)); - } - else if (!WIFSTOPPED (w)) - { - *status = 'X'; - return ((unsigned char) WTERMSIG (w)); - } - - fetch_inferior_registers (0); - - *status = 'T'; - return ((unsigned char) WSTOPSIG (w)); -} - -/* Resume execution of the inferior process. - If STEP is nonzero, single-step it. - If SIGNAL is nonzero, give it that signal. */ - -void -myresume (int step, int signal) -{ - errno = 0; - ptrace (step ? PTRACE_SINGLESTEP_ONE : PTRACE_CONT, - BUILDPID (inferior_pid, cont_thread == -1 ? 0 : cont_thread), - 1, signal); - if (errno) - perror_with_name ("ptrace"); -} - -#undef offsetof -#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) - -/* Mapping between GDB register #s and offsets into econtext. Must be - consistent with REGISTER_NAMES macro in various tmXXX.h files. */ - -#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 */ - 0, /* 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 - -#ifdef SPARC -/* Mappings from tm-sparc.h */ - -#define FX(ENTRY)(offsetof(struct fcontext, ENTRY)) - -static int regmap[] = -{ - -1, /* g0 */ - X (g1), - X (g2), - X (g3), - X (g4), - -1, /* g5->g7 aren't saved by Lynx */ - -1, - -1, - - X (o[0]), - X (o[1]), - X (o[2]), - X (o[3]), - X (o[4]), - X (o[5]), - X (o[6]), /* sp */ - X (o[7]), /* ra */ - - -1, -1, -1, -1, -1, -1, -1, -1, /* l0 -> l7 */ - - -1, -1, -1, -1, -1, -1, -1, -1, /* i0 -> i7 */ - - FX (f.fregs[0]), /* f0 */ - FX (f.fregs[1]), - FX (f.fregs[2]), - FX (f.fregs[3]), - FX (f.fregs[4]), - FX (f.fregs[5]), - FX (f.fregs[6]), - FX (f.fregs[7]), - FX (f.fregs[8]), - FX (f.fregs[9]), - FX (f.fregs[10]), - FX (f.fregs[11]), - FX (f.fregs[12]), - FX (f.fregs[13]), - FX (f.fregs[14]), - FX (f.fregs[15]), - FX (f.fregs[16]), - FX (f.fregs[17]), - FX (f.fregs[18]), - FX (f.fregs[19]), - FX (f.fregs[20]), - FX (f.fregs[21]), - FX (f.fregs[22]), - FX (f.fregs[23]), - FX (f.fregs[24]), - FX (f.fregs[25]), - FX (f.fregs[26]), - FX (f.fregs[27]), - FX (f.fregs[28]), - FX (f.fregs[29]), - FX (f.fregs[30]), - FX (f.fregs[31]), - - X (y), - X (psr), - X (wim), - X (tbr), - X (pc), - X (npc), - FX (fsr), /* fpsr */ - -1, /* cpsr */ -}; -#endif - -#ifdef SPARC - -/* This routine handles some oddball cases for Sparc registers and LynxOS. - In partucular, it causes refs to G0, g5->7, and all fp regs to return zero. - It also handles knows where to find the I & L regs on the stack. */ - -void -fetch_inferior_registers (int regno) -{ -#if 0 - int whatregs = 0; - -#define WHATREGS_FLOAT 1 -#define WHATREGS_GEN 2 -#define WHATREGS_STACK 4 - - if (regno == -1) - whatregs = WHATREGS_FLOAT | WHATREGS_GEN | WHATREGS_STACK; - else if (regno >= L0_REGNUM && regno <= I7_REGNUM) - whatregs = WHATREGS_STACK; - else if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) - whatregs = WHATREGS_FLOAT; - else - whatregs = WHATREGS_GEN; - - if (whatregs & WHATREGS_GEN) - { - struct econtext ec; /* general regs */ - char buf[MAX_REGISTER_RAW_SIZE]; - int retval; - int i; - - errno = 0; - retval = ptrace (PTRACE_GETREGS, - BUILDPID (inferior_pid, general_thread), - (PTRACE_ARG3_TYPE) & ec, - 0); - if (errno) - perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); - - memset (buf, 0, REGISTER_RAW_SIZE (G0_REGNUM)); - supply_register (G0_REGNUM, buf); - supply_register (TBR_REGNUM, (char *) &ec.tbr); - - memcpy (®isters[REGISTER_BYTE (G1_REGNUM)], &ec.g1, - 4 * REGISTER_RAW_SIZE (G1_REGNUM)); - for (i = G1_REGNUM; i <= G1_REGNUM + 3; i++) - register_valid[i] = 1; - - supply_register (PS_REGNUM, (char *) &ec.psr); - supply_register (Y_REGNUM, (char *) &ec.y); - supply_register (PC_REGNUM, (char *) &ec.pc); - supply_register (NPC_REGNUM, (char *) &ec.npc); - supply_register (WIM_REGNUM, (char *) &ec.wim); - - memcpy (®isters[REGISTER_BYTE (O0_REGNUM)], ec.o, - 8 * REGISTER_RAW_SIZE (O0_REGNUM)); - for (i = O0_REGNUM; i <= O0_REGNUM + 7; i++) - register_valid[i] = 1; - } - - if (whatregs & WHATREGS_STACK) - { - CORE_ADDR sp; - int i; - - sp = read_register (SP_REGNUM); - - target_xfer_memory (sp + FRAME_SAVED_I0, - ®isters[REGISTER_BYTE (I0_REGNUM)], - 8 * REGISTER_RAW_SIZE (I0_REGNUM), 0); - for (i = I0_REGNUM; i <= I7_REGNUM; i++) - register_valid[i] = 1; - - target_xfer_memory (sp + FRAME_SAVED_L0, - ®isters[REGISTER_BYTE (L0_REGNUM)], - 8 * REGISTER_RAW_SIZE (L0_REGNUM), 0); - for (i = L0_REGNUM; i <= L0_REGNUM + 7; i++) - register_valid[i] = 1; - } - - if (whatregs & WHATREGS_FLOAT) - { - struct fcontext fc; /* fp regs */ - int retval; - int i; - - errno = 0; - retval = ptrace (PTRACE_GETFPREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) & fc, - 0); - if (errno) - perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); - - memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], fc.f.fregs, - 32 * REGISTER_RAW_SIZE (FP0_REGNUM)); - for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++) - register_valid[i] = 1; - - supply_register (FPS_REGNUM, (char *) &fc.fsr); - } -#endif -} - -/* This routine handles storing of the I & L regs for the Sparc. The trick - here is that they actually live on the stack. The really tricky part is - that when changing the stack pointer, the I & L regs must be written to - where the new SP points, otherwise the regs will be incorrect when the - process is started up again. We assume that the I & L regs are valid at - this point. */ - -void -store_inferior_registers (int regno) -{ -#if 0 - int whatregs = 0; - - if (regno == -1) - whatregs = WHATREGS_FLOAT | WHATREGS_GEN | WHATREGS_STACK; - else if (regno >= L0_REGNUM && regno <= I7_REGNUM) - whatregs = WHATREGS_STACK; - else if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) - whatregs = WHATREGS_FLOAT; - else if (regno == SP_REGNUM) - whatregs = WHATREGS_STACK | WHATREGS_GEN; - else - whatregs = WHATREGS_GEN; - - if (whatregs & WHATREGS_GEN) - { - struct econtext ec; /* general regs */ - int retval; - - ec.tbr = read_register (TBR_REGNUM); - memcpy (&ec.g1, ®isters[REGISTER_BYTE (G1_REGNUM)], - 4 * REGISTER_RAW_SIZE (G1_REGNUM)); - - ec.psr = read_register (PS_REGNUM); - ec.y = read_register (Y_REGNUM); - ec.pc = read_register (PC_REGNUM); - ec.npc = read_register (NPC_REGNUM); - ec.wim = read_register (WIM_REGNUM); - - memcpy (ec.o, ®isters[REGISTER_BYTE (O0_REGNUM)], - 8 * REGISTER_RAW_SIZE (O0_REGNUM)); - - errno = 0; - retval = ptrace (PTRACE_SETREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) & ec, - 0); - if (errno) - perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); - } - - if (whatregs & WHATREGS_STACK) - { - int regoffset; - CORE_ADDR sp; - - sp = read_register (SP_REGNUM); - - if (regno == -1 || regno == SP_REGNUM) - { - if (!register_valid[L0_REGNUM + 5]) - abort (); - target_xfer_memory (sp + FRAME_SAVED_I0, - ®isters[REGISTER_BYTE (I0_REGNUM)], - 8 * REGISTER_RAW_SIZE (I0_REGNUM), 1); - - target_xfer_memory (sp + FRAME_SAVED_L0, - ®isters[REGISTER_BYTE (L0_REGNUM)], - 8 * REGISTER_RAW_SIZE (L0_REGNUM), 1); - } - else if (regno >= L0_REGNUM && regno <= I7_REGNUM) - { - if (!register_valid[regno]) - abort (); - if (regno >= L0_REGNUM && regno <= L0_REGNUM + 7) - regoffset = REGISTER_BYTE (regno) - REGISTER_BYTE (L0_REGNUM) - + FRAME_SAVED_L0; - else - regoffset = REGISTER_BYTE (regno) - REGISTER_BYTE (I0_REGNUM) - + FRAME_SAVED_I0; - target_xfer_memory (sp + regoffset, ®isters[REGISTER_BYTE (regno)], - REGISTER_RAW_SIZE (regno), 1); - } - } - - if (whatregs & WHATREGS_FLOAT) - { - struct fcontext fc; /* fp regs */ - int retval; - -/* We read fcontext first so that we can get good values for fq_t... */ - errno = 0; - retval = ptrace (PTRACE_GETFPREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) & fc, - 0); - if (errno) - perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); - - memcpy (fc.f.fregs, ®isters[REGISTER_BYTE (FP0_REGNUM)], - 32 * REGISTER_RAW_SIZE (FP0_REGNUM)); - - fc.fsr = read_register (FPS_REGNUM); - - errno = 0; - retval = ptrace (PTRACE_SETFPREGS, BUILDPID (inferior_pid, general_thread), (PTRACE_ARG3_TYPE) & fc, - 0); - if (errno) - perror_with_name ("Sparc fetch_inferior_registers(ptrace)"); - } -#endif -} -#endif /* SPARC */ - -#ifndef SPARC - -/* Return the offset relative to the start of the per-thread data to the - saved context block. */ - -static unsigned long -lynx_registers_addr (void) -{ - CORE_ADDR stblock; - int ecpoff = offsetof (st_t, ecp); - CORE_ADDR ecp; - - errno = 0; - stblock = (CORE_ADDR) ptrace (PTRACE_THREADUSER, BUILDPID (inferior_pid, general_thread), - (PTRACE_ARG3_TYPE) 0, 0); - if (errno) - perror_with_name ("PTRACE_THREADUSER"); - - ecp = (CORE_ADDR) ptrace (PTRACE_PEEKTHREAD, BUILDPID (inferior_pid, general_thread), - (PTRACE_ARG3_TYPE) ecpoff, 0); - if (errno) - perror_with_name ("lynx_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 (int ignored) -{ - int regno; - unsigned long reg; - unsigned long ecp; - - ecp = lynx_registers_addr (); - - for (regno = 0; regno < NUM_REGS; regno++) - { - int ptrace_fun = PTRACE_PEEKTHREAD; - -#ifdef PTRACE_PEEKUSP - ptrace_fun = regno == SP_REGNUM ? PTRACE_PEEKUSP : PTRACE_PEEKTHREAD; -#endif - - errno = 0; - reg = ptrace (ptrace_fun, BUILDPID (inferior_pid, general_thread), - (PTRACE_ARG3_TYPE) (ecp + regmap[regno]), 0); - if (errno) - perror_with_name ("fetch_inferior_registers(PTRACE_PEEKTHREAD)"); - - *(unsigned long *) ®isters[REGISTER_BYTE (regno)] = reg; - } -} - -/* 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 (int ignored) -{ - int regno; - unsigned long reg; - unsigned long ecp; - - ecp = lynx_registers_addr (); - - for (regno = 0; regno < NUM_REGS; regno++) - { - int ptrace_fun = PTRACE_POKEUSER; - -#ifdef PTRACE_POKEUSP - ptrace_fun = regno == SP_REGNUM ? PTRACE_POKEUSP : PTRACE_POKEUSER; -#endif - - reg = *(unsigned long *) ®isters[REGISTER_BYTE (regno)]; - - errno = 0; - ptrace (ptrace_fun, BUILDPID (inferior_pid, general_thread), - (PTRACE_ARG3_TYPE) (ecp + regmap[regno]), reg); - if (errno) - perror_with_name ("PTRACE_POKEUSER"); - } -} - -#endif /* ! SPARC */ - -/* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory - in the NEW_SUN_PTRACE case. - It ought to be straightforward. But it appears that writing did - not write the data that I specified. I cannot understand where - it got the data that it actually did write. */ - -/* Copy LEN bytes from inferior's memory starting at MEMADDR - to debugger memory starting at MYADDR. */ - -void -read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) -{ - register int i; - /* Round starting address down to longword boundary. */ - register CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (int); - /* Round ending address up; get number of longwords that makes. */ - register int count - = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); - /* Allocate buffer of that many longwords. */ - register int *buffer = (int *) alloca (count * sizeof (int)); - - /* Read all the longwords */ - for (i = 0; i < count; i++, addr += sizeof (int)) - { - buffer[i] = ptrace (PTRACE_PEEKTEXT, BUILDPID (inferior_pid, general_thread), addr, 0); - } - - /* Copy appropriate bytes out of the buffer. */ - memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); -} - -/* Copy LEN bytes of data from debugger memory at MYADDR - to inferior's memory at MEMADDR. - On failure (cannot write the inferior) - returns the value of errno. */ - -int -write_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) -{ - register int i; - /* Round starting address down to longword boundary. */ - register CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (int); - /* Round ending address up; get number of longwords that makes. */ - register int count - = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); - /* Allocate buffer of that many longwords. */ - register int *buffer = (int *) alloca (count * sizeof (int)); - extern int errno; - - /* Fill start and end extra bytes of buffer with existing memory data. */ - - buffer[0] = ptrace (PTRACE_PEEKTEXT, BUILDPID (inferior_pid, general_thread), addr, 0); - - if (count > 1) - { - buffer[count - 1] - = ptrace (PTRACE_PEEKTEXT, BUILDPID (inferior_pid, general_thread), - addr + (count - 1) * sizeof (int), 0); - } - - /* Copy data to be written over corresponding part of buffer */ - - memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); - - /* Write the entire buffer. */ - - for (i = 0; i < count; i++, addr += sizeof (int)) - { - while (1) - { - errno = 0; - ptrace (PTRACE_POKETEXT, BUILDPID (inferior_pid, general_thread), addr, buffer[i]); - if (errno) - { - fprintf (stderr, "\ -ptrace (PTRACE_POKETEXT): errno=%d, pid=0x%x, addr=0x%x, buffer[i] = 0x%x\n", - errno, BUILDPID (inferior_pid, general_thread), - addr, buffer[i]); - fprintf (stderr, "Sleeping for 1 second\n"); - sleep (1); - } - else - break; - } - } - - return 0; -} - -void -initialize_low (void) -{ -} |