diff options
Diffstat (limited to 'gnu/usr.bin/gdb/gdb/infptrace.c')
| -rw-r--r-- | gnu/usr.bin/gdb/gdb/infptrace.c | 507 |
1 files changed, 0 insertions, 507 deletions
diff --git a/gnu/usr.bin/gdb/gdb/infptrace.c b/gnu/usr.bin/gdb/gdb/infptrace.c deleted file mode 100644 index 05f448c..0000000 --- a/gnu/usr.bin/gdb/gdb/infptrace.c +++ /dev/null @@ -1,507 +0,0 @@ -/* Low level Unix child interface to ptrace, for GDB when running under Unix. - Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994 - 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" - -#ifdef USG -#include <sys/types.h> -#endif - -#include <sys/param.h> -#include <signal.h> -#include <sys/ioctl.h> - -#ifndef NO_PTRACE_H -#ifdef PTRACE_IN_WRONG_PLACE -#include <ptrace.h> -#else -#include <sys/ptrace.h> -#endif -#endif /* NO_PTRACE_H */ - -#if !defined (PT_KILL) -#define PT_KILL 8 -#endif - -#if !defined (PT_STEP) -#define PT_STEP 9 -#define PT_CONTINUE 7 -#define PT_READ_U 3 -#define PT_WRITE_U 6 -#define PT_READ_I 1 -#define PT_READ_D 2 -#define PT_WRITE_I 4 -#define PT_WRITE_D 5 -#endif /* No PT_STEP. */ - -#ifndef PT_ATTACH -#define PT_ATTACH PTRACE_ATTACH -#endif -#ifndef PT_DETACH -#define PT_DETACH PTRACE_DETACH -#endif - -#include "gdbcore.h" -#ifndef NO_SYS_FILE -#include <sys/file.h> -#endif -#if 0 -/* Don't think this is used anymore. On the sequent (not sure whether it's - dynix or ptx or both), it is included unconditionally by sys/user.h and - not protected against multiple inclusion. */ -#include <sys/stat.h> -#endif - -#if !defined (FETCH_INFERIOR_REGISTERS) -#include <sys/user.h> /* Probably need to poke the user structure */ -#if defined (KERNEL_U_ADDR_BSD) -#include <a.out.h> /* For struct nlist */ -#endif /* KERNEL_U_ADDR_BSD. */ -#endif /* !FETCH_INFERIOR_REGISTERS */ - - -/* This function simply calls ptrace with the given arguments. - It exists so that all calls to ptrace are isolated in this - machine-dependent file. */ -int -call_ptrace (request, pid, addr, data) - int request, pid; - PTRACE_ARG3_TYPE addr; - int data; -{ - return ptrace (request, pid, addr, data -#if defined (FIVE_ARG_PTRACE) - /* Deal with HPUX 8.0 braindamage. We never use the - calls which require the fifth argument. */ - , 0 -#endif - ); -} - -#if defined (DEBUG_PTRACE) || defined (FIVE_ARG_PTRACE) -/* For the rest of the file, use an extra level of indirection */ -/* This lets us breakpoint usefully on call_ptrace. */ -#define ptrace call_ptrace -#endif - -void -kill_inferior () -{ - if (inferior_pid == 0) - return; - /* ptrace PT_KILL only works if process is stopped!!! So stop it with - a real signal first, if we can. FIXME: This is bogus. When the inferior - is not stopped, GDB should just be waiting for it. Either the following - line is unecessary, or there is some problem elsewhere in GDB which - causes us to get here when the inferior is not stopped. */ - kill (inferior_pid, SIGKILL); - ptrace (PT_KILL, inferior_pid, (PTRACE_ARG3_TYPE) 0, 0); - wait ((int *)0); - target_mourn_inferior (); -} - -#ifndef CHILD_RESUME - -/* Resume execution of the inferior process. - If STEP is nonzero, single-step it. - If SIGNAL is nonzero, give it that signal. */ - -void -child_resume (pid, step, signal) - int pid; - int step; - enum target_signal signal; -{ - errno = 0; - - if (pid == -1) - /* Resume all threads. */ - /* I think this only gets used in the non-threaded case, where "resume - all threads" and "resume inferior_pid" are the same. */ - pid = inferior_pid; - - /* An address of (PTRACE_ARG3_TYPE)1 tells ptrace to continue from where - it was. (If GDB wanted it to start some other way, we have already - written a new PC value to the child.) - - If this system does not support PT_STEP, a higher level function will - have called single_step() to transmute the step request into a - continue request (by setting breakpoints on all possible successor - instructions), so we don't have to worry about that here. */ - - if (step) - ptrace (PT_STEP, pid, (PTRACE_ARG3_TYPE) 1, - target_signal_to_host (signal)); - else - ptrace (PT_CONTINUE, pid, (PTRACE_ARG3_TYPE) 1, - target_signal_to_host (signal)); - - if (errno) - perror_with_name ("ptrace"); -} -#endif /* CHILD_RESUME */ - - -#ifdef ATTACH_DETACH -#include <sys/fcntl.h> -/* Start debugging the process whose number is PID. */ -int -attach (pid) - int pid; -{ -#if defined(BSD4_4) && BSD >= 199306 - char procfile[MAXPATHLEN]; - int fd; - - sprintf(procfile, "/proc/%d/ctl", pid); - fd = open(procfile, O_WRONLY, 0); - - if (fd < 0) { - perror_with_name ("open"); - } - - /* send attach message to the process */ - if (write (fd, "attach", 7) < 0) { - close(fd); - perror_with_name ("write:attach"); - } - /* wait for the process to stop */ -#if 0 - if (write (fd, "wait", 5) < 0) { - close(fd); - perror_with_name ("write:wait"); - } -#endif - close (fd); -#else - errno = 0; - ptrace (PT_ATTACH, pid, (PTRACE_ARG3_TYPE) 0, 0); - if (errno) - perror_with_name ("ptrace"); -#endif - attach_flag = 1; - return pid; -} - -/* Stop debugging the process whose number is PID - and continue it with signal number SIGNAL. - SIGNAL = 0 means just continue it. */ - -void -detach (signal) - int signal; -{ -#if defined(BSD4_4) && BSD >= 199306 - char procfile[MAXPATHLEN]; - int fd; - - sprintf(procfile, "/proc/%d/ctl", inferior_pid); - fd = open(procfile, O_WRONLY, 0); - - if (fd < 0) { - perror_with_name ("open"); - } - /* send detach message to the process */ - if (write (fd, "detach", 7) < 0) { - close(fd); - perror_with_name ("write:detach"); - } - /* TODO signals */ - close (fd); -#else - errno = 0; - ptrace (PT_DETACH, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal); - if (errno) - perror_with_name ("ptrace"); -#endif - attach_flag = 0; -} -#endif /* ATTACH_DETACH */ - -/* Default the type of the ptrace transfer to int. */ -#ifndef PTRACE_XFER_TYPE -#define PTRACE_XFER_TYPE int -#endif - -/* KERNEL_U_ADDR is the amount to subtract from u.u_ar0 - to get the offset in the core file of the register values. */ -#if defined (KERNEL_U_ADDR_BSD) && !defined (FETCH_INFERIOR_REGISTERS) -/* Get kernel_u_addr using BSD-style nlist(). */ -CORE_ADDR kernel_u_addr; -#endif /* KERNEL_U_ADDR_BSD. */ - -void -_initialize_kernel_u_addr () -{ -#if defined (KERNEL_U_ADDR_BSD) && !defined (FETCH_INFERIOR_REGISTERS) - struct nlist names[2]; - - names[0].n_un.n_name = "_u"; - names[1].n_un.n_name = NULL; - if (nlist ("/vmunix", names) == 0) - kernel_u_addr = names[0].n_value; - else - fatal ("Unable to get kernel u area address."); -#endif /* KERNEL_U_ADDR_BSD. */ -} - -#if !defined (FETCH_INFERIOR_REGISTERS) - -#if !defined (offsetof) -#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) -#endif - -/* U_REGS_OFFSET is the offset of the registers within the u area. */ -#if !defined (U_REGS_OFFSET) -#define U_REGS_OFFSET \ - ptrace (PT_READ_U, inferior_pid, \ - (PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0) \ - - KERNEL_U_ADDR -#endif - -/* Registers we shouldn't try to fetch. */ -#if !defined (CANNOT_FETCH_REGISTER) -#define CANNOT_FETCH_REGISTER(regno) 0 -#endif - -/* Fetch one register. */ - -static void -fetch_register (regno) - int regno; -{ - /* This isn't really an address. But ptrace thinks of it as one. */ - CORE_ADDR regaddr; - char buf[MAX_REGISTER_RAW_SIZE]; - char mess[128]; /* For messages */ - register int i; - - /* Offset of registers within the u area. */ - unsigned int offset; - - if (CANNOT_FETCH_REGISTER (regno)) - { - memset (buf, '\0', REGISTER_RAW_SIZE (regno)); /* Supply zeroes */ - supply_register (regno, buf); - return; - } - - offset = U_REGS_OFFSET; - - regaddr = register_addr (regno, offset); - for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE)) - { - errno = 0; - *(PTRACE_XFER_TYPE *) &buf[i] = ptrace (PT_READ_U, inferior_pid, - (PTRACE_ARG3_TYPE) regaddr, 0); - regaddr += sizeof (PTRACE_XFER_TYPE); - if (errno != 0) - { - sprintf (mess, "reading register %s (#%d)", reg_names[regno], regno); - perror_with_name (mess); - } - } - supply_register (regno, buf); -} - - -/* Fetch all registers, or just one, from the child process. */ - -void -fetch_inferior_registers (regno) - int regno; -{ - int numregs; - - if (regno == -1) - { - numregs = ARCH_NUM_REGS; - for (regno = 0; regno < numregs; regno++) - fetch_register (regno); - } - else - fetch_register (regno); -} - -/* Registers we shouldn't try to store. */ -#if !defined (CANNOT_STORE_REGISTER) -#define CANNOT_STORE_REGISTER(regno) 0 -#endif - -/* 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; -{ - /* This isn't really an address. But ptrace thinks of it as one. */ - CORE_ADDR regaddr; - char buf[80]; - register int i, numregs; - - unsigned int offset = U_REGS_OFFSET; - - if (regno >= 0) - { - regaddr = register_addr (regno, offset); - for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(PTRACE_XFER_TYPE)) - { - errno = 0; - ptrace (PT_WRITE_U, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, - *(PTRACE_XFER_TYPE *) ®isters[REGISTER_BYTE (regno) + i]); - if (errno != 0) - { - sprintf (buf, "writing register number %d(%d)", regno, i); - perror_with_name (buf); - } - regaddr += sizeof(PTRACE_XFER_TYPE); - } - } - else - { - numregs = ARCH_NUM_REGS; - for (regno = 0; regno < numregs; regno++) - { - if (CANNOT_STORE_REGISTER (regno)) - continue; - regaddr = register_addr (regno, offset); - for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(PTRACE_XFER_TYPE)) - { - errno = 0; - ptrace (PT_WRITE_U, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, - *(PTRACE_XFER_TYPE *) ®isters[REGISTER_BYTE (regno) + i]); - if (errno != 0) - { - sprintf (buf, "writing register number %d(%d)", regno, i); - perror_with_name (buf); - } - regaddr += sizeof(PTRACE_XFER_TYPE); - } - } - } -} -#endif /* !defined (FETCH_INFERIOR_REGISTERS). */ - - -#if !defined (CHILD_XFER_MEMORY) -/* 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 to or from inferior's memory starting at MEMADDR - to debugger memory starting at MYADDR. Copy to inferior if - WRITE is nonzero. - - Returns the length copied, which is either the LEN argument or zero. - This xfer function does not do partial moves, since child_ops - doesn't allow memory operations to cross below us in the target stack - anyway. */ - -int -child_xfer_memory (memaddr, myaddr, len, write, target) - CORE_ADDR memaddr; - char *myaddr; - int len; - int write; - struct target_ops *target; /* ignored */ -{ - register int i; - /* Round starting address down to longword boundary. */ - register CORE_ADDR addr = memaddr & - sizeof (PTRACE_XFER_TYPE); - /* Round ending address up; get number of longwords that makes. */ - register int count - = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1) - / sizeof (PTRACE_XFER_TYPE); - /* Allocate buffer of that many longwords. */ - register PTRACE_XFER_TYPE *buffer - = (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE)); - - if (write) - { - /* Fill start and end extra bytes of buffer with existing memory data. */ - - if (addr != memaddr || len < (int) sizeof (PTRACE_XFER_TYPE)) { - /* Need part of initial word -- fetch it. */ - buffer[0] = ptrace (PT_READ_I, inferior_pid, (PTRACE_ARG3_TYPE) addr, - 0); - } - - if (count > 1) /* FIXME, avoid if even boundary */ - { - buffer[count - 1] - = ptrace (PT_READ_I, inferior_pid, - ((PTRACE_ARG3_TYPE) - (addr + (count - 1) * sizeof (PTRACE_XFER_TYPE))), - 0); - } - - /* Copy data to be written over corresponding part of buffer */ - - memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), - myaddr, - len); - - /* Write the entire buffer. */ - - for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE)) - { - errno = 0; - ptrace (PT_WRITE_D, inferior_pid, (PTRACE_ARG3_TYPE) addr, - buffer[i]); - if (errno) - { - /* Using the appropriate one (I or D) is necessary for - Gould NP1, at least. */ - errno = 0; - ptrace (PT_WRITE_I, inferior_pid, (PTRACE_ARG3_TYPE) addr, - buffer[i]); - } - if (errno) - return 0; - } - } - else - { - /* Read all the longwords */ - for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE)) - { - errno = 0; - buffer[i] = ptrace (PT_READ_I, inferior_pid, - (PTRACE_ARG3_TYPE) addr, 0); - if (errno) - return 0; - QUIT; - } - - /* Copy appropriate bytes out of the buffer. */ - memcpy (myaddr, - (char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), - len); - } - return len; -} -#endif /* !defined (CHILD_XFER_MEMORY). */ |
