diff options
Diffstat (limited to 'gdb/isi-dep.c')
| -rw-r--r-- | gdb/isi-dep.c | 626 |
1 files changed, 0 insertions, 626 deletions
diff --git a/gdb/isi-dep.c b/gdb/isi-dep.c deleted file mode 100644 index 013d4c9..0000000 --- a/gdb/isi-dep.c +++ /dev/null @@ -1,626 +0,0 @@ -/* Low level interface to ptrace, for GDB when running under Unix. - Copyright (C) 1988 Free Software Foundation, Inc. - -GDB is distributed in the hope that it will be useful, but WITHOUT ANY -WARRANTY. No author or distributor accepts responsibility to anyone -for the consequences of using it or for whether it serves any -particular purpose or works at all, unless he says so in writing. -Refer to the GDB General Public License for full details. - -Everyone is granted permission to copy, modify and redistribute GDB, -but only under the conditions described in the GDB General Public -License. A copy of this license is supposed to have been given to you -along with GDB so you can know your rights and responsibilities. It -should be in a file named COPYING. Among other things, the copyright -notice and this notice must be preserved on all copies. - -In other words, go ahead and share GDB, but don't try to stop -anyone else from sharing it farther. Help stamp out software hoarding! -*/ - -#include <stdio.h> -#include "defs.h" -#include "param.h" -#include "frame.h" -#include "inferior.h" - -#ifdef USG -#include <sys/types.h> -#endif - -#include <sys/param.h> -#include <sys/dir.h> -#include <signal.h> -#include <sys/user.h> -#include <sys/ioctl.h> -#include <fcntl.h> - -#ifdef COFF_ENCAPSULATE -#include "a.out.encap.h" -#else -#include <a.out.h> -#endif -#ifndef N_SET_MAGIC -#define N_SET_MAGIC(exec, val) ((exec).a_magic = (val)) -#endif -#include <sys/file.h> -#include <sys/stat.h> - -#include <sys/ptrace.h> -#ifdef ATTACH_DETACH -static int oldParent; -extern int attach_flag; -#endif /* ATTACH_DETACH */ - -/* - * Mapping of register numbers to their position in the stack - */ -#include <machine/reg.h> -int rloc[] = { - R0, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, FP, SP, PS, PC -}; - -extern int errno; - -/* 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, arg3, arg4) - int request, pid, arg3, arg4; -{ - return ptrace (request, pid, arg3, arg4); -} - -#ifdef ATTACH_DETACH -/* Start debugging the process whose number is PID. */ - -attach (pid) - int pid; -{ - errno = 0; - oldParent = ptrace (PT_ATTACH, pid, 0, 0); - if (errno) - perror_with_name ("ptrace"); - 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; -{ - errno = 0; - ptrace (PT_DETACH, inferior_pid, signal, oldParent); - if (errno) - perror_with_name ("ptrace"); - attach_flag = 0; -} - -#endif /* ATTACH_DETACH */ - -kill_inferior () -{ - if (remote_debugging) - return; - if (inferior_pid == 0) - return; - -#ifdef ATTACH_DETACH - if (attach_flag) { - /* - * Need to detach so the old parent gets notified of the death. - */ - detach(SIGKILL); - } else { -#endif /* ATTACH_DETACH */ - ptrace (PT_KILL, inferior_pid, 0, 0); - wait (0); -#ifdef ATTACH_DETACH - } -#endif /* ATTACH_DETACH */ - inferior_died (); -} - -/* This is used when GDB is exiting. It gives less chance of error.*/ - -kill_inferior_fast () -{ - if (remote_debugging) - return; - if (inferior_pid == 0) - return; -#ifdef ATTACH_DETACH - if (attach_flag) { - detach(SIGKILL); - } else { -#endif /* ATTACH_DETACH */ - ptrace (PT_KILL, inferior_pid, 0, 0); - wait (0); -#ifdef ATTACH_DETACH - } -#endif /* ATTACH_DETACH */ -} - -/* Resume execution of the inferior process. - If STEP is nonzero, single-step it. - If SIGNAL is nonzero, give it that signal. */ - -void -resume (step, signal) - int step; - int signal; -{ - errno = 0; - if (remote_debugging) - remote_resume (step, signal); - else - { - ptrace (step ? PT_STEP : PT_CONTINUE, inferior_pid, 1, signal); - if (errno) - perror_with_name ("ptrace"); - } -} - -void -fetch_inferior_registers () -{ - register int regno; - register unsigned int regaddr; - char buf[MAX_REGISTER_RAW_SIZE]; - register int i; - - struct user u; - unsigned int offset = (char *) &u.u_ar0 - (char *) &u; - offset = ptrace (3, inferior_pid, offset, 0) - KERNEL_U_ADDR; - - for (regno = 0; regno < NUM_REGS; regno++) - { - regaddr = register_addr (regno, offset); - for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int)) - { - *(int *) &buf[i] = ptrace (3, inferior_pid, regaddr, 0); - regaddr += sizeof (int); - } - 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). */ - -store_inferior_registers (regno) - int regno; -{ - register unsigned int regaddr; - char buf[80]; - - struct user u; - unsigned int offset = (char *) &u.u_ar0 - (char *) &u; - offset = ptrace (3, inferior_pid, offset, 0) - KERNEL_U_ADDR; - - if (regno >= 0) - { - regaddr = register_addr (regno, offset); - errno = 0; - ptrace (6, inferior_pid, regaddr, read_register (regno)); - if (errno != 0) - { - sprintf (buf, "writing register number %d", regno); - perror_with_name (buf); - } - } - else for (regno = 0; regno < NUM_REGS; regno++) - { - regaddr = register_addr (regno, offset); - errno = 0; - ptrace (6, inferior_pid, regaddr, read_register (regno)); - if (errno != 0) - { - sprintf (buf, "writing register number %d", regno); - perror_with_name (buf); - } - } -} - -/* Copy LEN bytes from inferior's memory starting at MEMADDR - to debugger memory starting at MYADDR. - On failure (cannot read from inferior, usually because address is out - of bounds) returns the value of errno. */ - -int -read_inferior_memory (memaddr, myaddr, len) - CORE_ADDR memaddr; - char *myaddr; - int len; -{ - register int i; - /* Round starting address down to longword boundary. */ - register CORE_ADDR addr = memaddr & - 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; - - /* Read all the longwords */ - for (i = 0; i < count; i++, addr += sizeof (int)) - { - errno = 0; - if (remote_debugging) - buffer[i] = remote_fetch_word (addr); - else - buffer[i] = ptrace (1, inferior_pid, addr, 0); - if (errno) - return errno; - } - - /* Copy appropriate bytes out of the buffer. */ - bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); - return 0; -} - -/* 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 (memaddr, myaddr, len) - CORE_ADDR memaddr; - char *myaddr; - int len; -{ - register int i; - /* Round starting address down to longword boundary. */ - register CORE_ADDR addr = memaddr & - 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. */ - - if (remote_debugging) - buffer[0] = remote_fetch_word (addr); - else - buffer[0] = ptrace (1, inferior_pid, addr, 0); - - if (count > 1) - { - if (remote_debugging) - buffer[count - 1] - = remote_fetch_word (addr + (count - 1) * sizeof (int)); - else - buffer[count - 1] - = ptrace (1, inferior_pid, - addr + (count - 1) * sizeof (int), 0); - } - - /* Copy data to be written over corresponding part of buffer */ - - bcopy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); - - /* Write the entire buffer. */ - - for (i = 0; i < count; i++, addr += sizeof (int)) - { - errno = 0; - if (remote_debugging) - remote_store_word (addr, buffer[i]); - else - ptrace (4, inferior_pid, addr, buffer[i]); - if (errno) - return errno; - } - - return 0; -} - -/* Work with core dump and executable files, for GDB. - This code would be in core.c if it weren't machine-dependent. */ - -/* Recognize COFF format systems because a.out.h defines AOUTHDR. */ -#ifdef AOUTHDR -#define COFF_FORMAT -#endif - -#ifndef N_TXTADDR -#define N_TXTADDR(hdr) 0 -#endif /* no N_TXTADDR */ - -#ifndef N_DATADDR -#define N_DATADDR(hdr) hdr.a_text -#endif /* no N_DATADDR */ - -/* Make COFF and non-COFF names for things a little more compatible - to reduce conditionals later. */ - -#ifdef COFF_FORMAT -#define a_magic magic -#endif - -#ifndef COFF_FORMAT -#define AOUTHDR struct exec -#endif - -extern char *sys_siglist[]; - - -/* Hook for `exec_file_command' command to call. */ - -extern void (*exec_file_display_hook) (); - -/* File names of core file and executable file. */ - -extern char *corefile; -extern char *execfile; - -/* Descriptors on which core file and executable file are open. - Note that the execchan is closed when an inferior is created - and reopened if the inferior dies or is killed. */ - -extern int corechan; -extern int execchan; - -/* Last modification time of executable file. - Also used in source.c to compare against mtime of a source file. */ - -extern int exec_mtime; - -/* Virtual addresses of bounds of the two areas of memory in the core file. */ - -extern CORE_ADDR data_start; -extern CORE_ADDR data_end; -extern CORE_ADDR stack_start; -extern CORE_ADDR stack_end; - -/* Virtual addresses of bounds of two areas of memory in the exec file. - Note that the data area in the exec file is used only when there is no core file. */ - -extern CORE_ADDR text_start; -extern CORE_ADDR text_end; - -extern CORE_ADDR exec_data_start; -extern CORE_ADDR exec_data_end; - -/* Address in executable file of start of text area data. */ - -extern int text_offset; - -/* Address in executable file of start of data area data. */ - -extern int exec_data_offset; - -/* Address in core file of start of data area data. */ - -extern int data_offset; - -/* Address in core file of start of stack area data. */ - -extern int stack_offset; - -#ifdef COFF_FORMAT -/* various coff data structures */ - -extern FILHDR file_hdr; -extern SCNHDR text_hdr; -extern SCNHDR data_hdr; - -#endif /* not COFF_FORMAT */ - -/* a.out header saved in core file. */ - -extern AOUTHDR core_aouthdr; - -/* a.out header of exec file. */ - -extern AOUTHDR exec_aouthdr; - -extern void validate_files (); - -core_file_command (filename, from_tty) - char *filename; - int from_tty; -{ - int val; - extern char registers[]; - - /* Discard all vestiges of any previous core file - and mark data and stack spaces as empty. */ - - if (corefile) - free (corefile); - corefile = 0; - - if (corechan >= 0) - close (corechan); - corechan = -1; - - data_start = 0; - data_end = 0; - stack_start = STACK_END_ADDR; - stack_end = STACK_END_ADDR; - - /* Now, if a new core file was specified, open it and digest it. */ - - if (filename) - { - filename = tilde_expand (filename); - make_cleanup (free, filename); - - if (have_inferior_p ()) - error ("To look at a core file, you must kill the inferior with \"kill\"."); - corechan = open (filename, O_RDONLY, 0); - if (corechan < 0) - perror_with_name (filename); - /* 4.2-style (and perhaps also sysV-style) core dump file. */ - { - struct user u; - - int reg_offset; - - val = myread (corechan, &u, sizeof u); - if (val < 0) - perror_with_name (filename); - data_start = exec_data_start; - - data_end = data_start + NBPG * u.u_dsize; - stack_start = stack_end - NBPG * u.u_ssize; - data_offset = NBPG * UPAGES; - stack_offset = NBPG * (UPAGES + u.u_dsize); - reg_offset = (int) u.u_ar0 - KERNEL_U_ADDR; - - /* I don't know where to find this info. - So, for now, mark it as not available. */ - N_SET_MAGIC (core_aouthdr, 0); - - /* Read the register values out of the core file and store - them where `read_register' will find them. */ - - { - register int regno; - - for (regno = 0; regno < NUM_REGS; regno++) - { - char buf[MAX_REGISTER_RAW_SIZE]; - - val = lseek (corechan, register_addr (regno, reg_offset), 0); - if (val < 0) - perror_with_name (filename); - - val = myread (corechan, buf, sizeof buf); - if (val < 0) - perror_with_name (filename); - supply_register (regno, buf); - } - } - } - if (filename[0] == '/') - corefile = savestring (filename, strlen (filename)); - else - { - corefile = concat (current_directory, "/", filename); - } - - set_current_frame ( create_new_frame (read_register (FP_REGNUM), - read_pc ())); - select_frame (get_current_frame (), 0); - validate_files (); - } - else if (from_tty) - printf ("No core file now.\n"); -} - -exec_file_command (filename, from_tty) - char *filename; - int from_tty; -{ - int val; - - /* Eliminate all traces of old exec file. - Mark text segment as empty. */ - - if (execfile) - free (execfile); - execfile = 0; - data_start = 0; - data_end -= exec_data_start; - text_start = 0; - text_end = 0; - exec_data_start = 0; - exec_data_end = 0; - if (execchan >= 0) - close (execchan); - execchan = -1; - - /* Now open and digest the file the user requested, if any. */ - - if (filename) - { - filename = tilde_expand (filename); - make_cleanup (free, filename); - - execchan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0, - &execfile); - if (execchan < 0) - perror_with_name (filename); - -#ifdef COFF_FORMAT - { - int aout_hdrsize; - int num_sections; - - if (read_file_hdr (execchan, &file_hdr) < 0) - error ("\"%s\": not in executable format.", execfile); - - aout_hdrsize = file_hdr.f_opthdr; - num_sections = file_hdr.f_nscns; - - if (read_aout_hdr (execchan, &exec_aouthdr, aout_hdrsize) < 0) - error ("\"%s\": can't read optional aouthdr", execfile); - - if (read_section_hdr (execchan, _TEXT, &text_hdr, num_sections, - aout_hdrsize) < 0) - error ("\"%s\": can't read text section header", execfile); - - if (read_section_hdr (execchan, _DATA, &data_hdr, num_sections, - aout_hdrsize) < 0) - error ("\"%s\": can't read data section header", execfile); - - text_start = exec_aouthdr.text_start; - text_end = text_start + exec_aouthdr.tsize; - text_offset = text_hdr.s_scnptr; - exec_data_start = exec_aouthdr.data_start; - exec_data_end = exec_data_start + exec_aouthdr.dsize; - exec_data_offset = data_hdr.s_scnptr; - data_start = exec_data_start; - data_end += exec_data_start; - exec_mtime = file_hdr.f_timdat; - } -#else /* not COFF_FORMAT */ - { - struct stat st_exec; - -#ifdef HEADER_SEEK_FD - HEADER_SEEK_FD (execchan); -#endif - - val = myread (execchan, &exec_aouthdr, sizeof (AOUTHDR)); - - if (val < 0) - perror_with_name (filename); - - text_start = N_TXTADDR (exec_aouthdr); - exec_data_start = N_DATADDR (exec_aouthdr); - - text_offset = N_TXTOFF (exec_aouthdr); - exec_data_offset = N_TXTOFF (exec_aouthdr) + exec_aouthdr.a_text; - - text_end = text_start + exec_aouthdr.a_text; - exec_data_end = exec_data_start + exec_aouthdr.a_data; - data_start = exec_data_start; - data_end += exec_data_start; - - fstat (execchan, &st_exec); - exec_mtime = st_exec.st_mtime; - } -#endif /* not COFF_FORMAT */ - - validate_files (); - } - else if (from_tty) - printf ("No exec file now.\n"); - - /* Tell display code (if any) about the changed file name. */ - if (exec_file_display_hook) - (*exec_file_display_hook) (filename); -} |