| /* 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) |
| { |
| } |