| /* OBSOLETE /* Low level Pyramid interface to ptrace, for GDB when running under Unix. */ |
| /* OBSOLETE Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc. */ |
| /* OBSOLETE */ |
| /* OBSOLETE This file is part of GDB. */ |
| /* OBSOLETE */ |
| /* OBSOLETE This program is free software; you can redistribute it and/or modify */ |
| /* OBSOLETE it under the terms of the GNU General Public License as published by */ |
| /* OBSOLETE the Free Software Foundation; either version 2 of the License, or */ |
| /* OBSOLETE (at your option) any later version. */ |
| /* OBSOLETE */ |
| /* OBSOLETE This program is distributed in the hope that it will be useful, */ |
| /* OBSOLETE but WITHOUT ANY WARRANTY; without even the implied warranty of */ |
| /* OBSOLETE MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ |
| /* OBSOLETE GNU General Public License for more details. */ |
| /* OBSOLETE */ |
| /* OBSOLETE You should have received a copy of the GNU General Public License */ |
| /* OBSOLETE along with this program; if not, write to the Free Software */ |
| /* OBSOLETE Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE #include "defs.h" */ |
| /* OBSOLETE #include "frame.h" */ |
| /* OBSOLETE #include "inferior.h" */ |
| /* OBSOLETE */ |
| /* OBSOLETE #include <sys/param.h> */ |
| /* OBSOLETE #include <sys/dir.h> */ |
| /* OBSOLETE #include <signal.h> */ |
| /* OBSOLETE #include <sys/ioctl.h> */ |
| /* OBSOLETE /* #include <fcntl.h> Can we live without this? *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE #include "gdbcore.h" */ |
| /* OBSOLETE #include <sys/user.h> /* After a.out.h *x/ */ |
| /* OBSOLETE #include <sys/file.h> */ |
| /* OBSOLETE #include "gdb_stat.h" */ |
| /* OBSOLETE */ |
| /* OBSOLETE */ |
| /* OBSOLETE void */ |
| /* OBSOLETE fetch_inferior_registers (regno) */ |
| /* OBSOLETE int regno; */ |
| /* OBSOLETE { */ |
| /* OBSOLETE register int datum; */ |
| /* OBSOLETE register unsigned int regaddr; */ |
| /* OBSOLETE int reg_buf[NUM_REGS+1]; */ |
| /* OBSOLETE struct user u; */ |
| /* OBSOLETE register int skipped_frames = 0; */ |
| /* OBSOLETE */ |
| /* OBSOLETE registers_fetched (); */ |
| /* OBSOLETE */ |
| /* OBSOLETE for (regno = 0; regno < 64; regno++) { */ |
| /* OBSOLETE reg_buf[regno] = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) regno, 0); */ |
| /* OBSOLETE */ |
| /* OBSOLETE #if defined(PYRAMID_CONTROL_FRAME_DEBUGGING) */ |
| /* OBSOLETE printf_unfiltered ("Fetching register %s, got %0x\n", */ |
| /* OBSOLETE REGISTER_NAME (regno), */ |
| /* OBSOLETE reg_buf[regno]); */ |
| /* OBSOLETE #endif /* PYRAMID_CONTROL_FRAME_DEBUGGING *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE if (reg_buf[regno] == -1 && errno == EIO) { */ |
| /* OBSOLETE printf_unfiltered("fetch_interior_registers: fetching register %s\n", */ |
| /* OBSOLETE REGISTER_NAME (regno)); */ |
| /* OBSOLETE errno = 0; */ |
| /* OBSOLETE } */ |
| /* OBSOLETE supply_register (regno, reg_buf+regno); */ |
| /* OBSOLETE } */ |
| /* OBSOLETE /* that leaves regs 64, 65, and 66 *x/ */ |
| /* OBSOLETE datum = ptrace (3, inferior_pid, */ |
| /* OBSOLETE (PTRACE_ARG3_TYPE) (((char *)&u.u_pcb.pcb_csp) - */ |
| /* OBSOLETE ((char *)&u)), 0); */ |
| /* OBSOLETE */ |
| /* OBSOLETE */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* FIXME: Find the Current Frame Pointer (CFP). CFP is a global */ |
| /* OBSOLETE register (ie, NOT windowed), that gets saved in a frame iff */ |
| /* OBSOLETE the code for that frame has a prologue (ie, "adsf N"). If */ |
| /* OBSOLETE there is a prologue, the adsf insn saves the old cfp in */ |
| /* OBSOLETE pr13, cfp is set to sp, and N bytes of locals are allocated */ |
| /* OBSOLETE (sp is decremented by n). */ |
| /* OBSOLETE This makes finding CFP hard. I guess the right way to do it */ |
| /* OBSOLETE is: */ |
| /* OBSOLETE - If this is the innermost frame, believe ptrace() or */ |
| /* OBSOLETE the core area. */ |
| /* OBSOLETE - Otherwise: */ |
| /* OBSOLETE Find the first insn of the current frame. */ |
| /* OBSOLETE - find the saved pc; */ |
| /* OBSOLETE - find the call insn that saved it; */ |
| /* OBSOLETE - figure out where the call is to; */ |
| /* OBSOLETE - if the first insn is an adsf, we got a frame */ |
| /* OBSOLETE pointer. *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* Normal processors have separate stack pointers for user and */ |
| /* OBSOLETE kernel mode. Getting the last user mode frame on such */ |
| /* OBSOLETE machines is easy: the kernel context of the ptrace()'d */ |
| /* OBSOLETE process is on the kernel stack, and the USP points to what */ |
| /* OBSOLETE we want. But Pyramids only have a single cfp for both user and */ |
| /* OBSOLETE kernel mode. And processes being ptrace()'d have some */ |
| /* OBSOLETE kernel-context control frames on their stack. */ |
| /* OBSOLETE To avoid tracing back into the kernel context of an inferior, */ |
| /* OBSOLETE we skip 0 or more contiguous control frames where the pc is */ |
| /* OBSOLETE in the kernel. *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE while (1) { */ |
| /* OBSOLETE register int inferior_saved_pc; */ |
| /* OBSOLETE inferior_saved_pc = ptrace (1, inferior_pid, */ |
| /* OBSOLETE (PTRACE_ARG3_TYPE) (datum+((32+15)*4)), 0); */ |
| /* OBSOLETE if (inferior_saved_pc > 0) break; */ |
| /* OBSOLETE #if defined(PYRAMID_CONTROL_FRAME_DEBUGGING) */ |
| /* OBSOLETE printf_unfiltered("skipping kernel frame %08x, pc=%08x\n", datum, */ |
| /* OBSOLETE inferior_saved_pc); */ |
| /* OBSOLETE #endif /* PYRAMID_CONTROL_FRAME_DEBUGGING *x/ */ |
| /* OBSOLETE skipped_frames++; */ |
| /* OBSOLETE datum -= CONTROL_STACK_FRAME_SIZE; */ |
| /* OBSOLETE } */ |
| /* OBSOLETE */ |
| /* OBSOLETE reg_buf[CSP_REGNUM] = datum; */ |
| /* OBSOLETE supply_register(CSP_REGNUM, reg_buf+CSP_REGNUM); */ |
| /* OBSOLETE #ifdef PYRAMID_CONTROL_FRAME_DEBUGGING */ |
| /* OBSOLETE if (skipped_frames) { */ |
| /* OBSOLETE fprintf_unfiltered (gdb_stderr, */ |
| /* OBSOLETE "skipped %d frames from %x to %x; cfp was %x, now %x\n", */ |
| /* OBSOLETE skipped_frames, reg_buf[CSP_REGNUM]); */ |
| /* OBSOLETE } */ |
| /* OBSOLETE #endif /* PYRAMID_CONTROL_FRAME_DEBUGGING *x/ */ |
| /* OBSOLETE } */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* Store our register values back into the inferior. */ |
| /* OBSOLETE If REGNO is -1, do this for all registers. */ |
| /* OBSOLETE Otherwise, REGNO specifies which register (so we can save time). *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE void */ |
| /* OBSOLETE store_inferior_registers (regno) */ |
| /* OBSOLETE int regno; */ |
| /* OBSOLETE { */ |
| /* OBSOLETE register unsigned int regaddr; */ |
| /* OBSOLETE char buf[80]; */ |
| /* OBSOLETE */ |
| /* OBSOLETE if (regno >= 0) */ |
| /* OBSOLETE { */ |
| /* OBSOLETE if ((0 <= regno) && (regno < 64)) { */ |
| /* OBSOLETE /*regaddr = register_addr (regno, offset);*x/ */ |
| /* OBSOLETE regaddr = regno; */ |
| /* OBSOLETE errno = 0; */ |
| /* OBSOLETE ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, */ |
| /* OBSOLETE read_register (regno)); */ |
| /* OBSOLETE if (errno != 0) */ |
| /* OBSOLETE { */ |
| /* OBSOLETE sprintf (buf, "writing register number %d", regno); */ |
| /* OBSOLETE perror_with_name (buf); */ |
| /* OBSOLETE } */ |
| /* OBSOLETE } */ |
| /* OBSOLETE } */ |
| /* OBSOLETE else */ |
| /* OBSOLETE { */ |
| /* OBSOLETE for (regno = 0; regno < NUM_REGS; regno++) */ |
| /* OBSOLETE { */ |
| /* OBSOLETE /*regaddr = register_addr (regno, offset);*x/ */ |
| /* OBSOLETE regaddr = regno; */ |
| /* OBSOLETE errno = 0; */ |
| /* OBSOLETE ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, */ |
| /* OBSOLETE read_register (regno)); */ |
| /* OBSOLETE if (errno != 0) */ |
| /* OBSOLETE { */ |
| /* OBSOLETE sprintf (buf, "writing all regs, number %d", regno); */ |
| /* OBSOLETE perror_with_name (buf); */ |
| /* OBSOLETE } */ |
| /* OBSOLETE } */ |
| /* OBSOLETE } */ |
| /* OBSOLETE */ |
| /* OBSOLETE /*** Extensions to core and dump files, for GDB. *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE extern unsigned int last_frame_offset; */ |
| /* OBSOLETE */ |
| /* OBSOLETE #ifdef PYRAMID_CORE */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* Can't make definitions here static, since corefile.c needs them */ |
| /* OBSOLETE to do bounds checking on the core-file areas. O well. *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* have two stacks: one for data, one for register windows. *x/ */ |
| /* OBSOLETE extern CORE_ADDR reg_stack_start; */ |
| /* OBSOLETE extern CORE_ADDR reg_stack_end; */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* need this so we can find the global registers: they never get saved. *x/ */ |
| /* OBSOLETE CORE_ADDR global_reg_offset; */ |
| /* OBSOLETE static CORE_ADDR last_frame_address; */ |
| /* OBSOLETE CORE_ADDR last_frame_offset; */ |
| /* OBSOLETE */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* Address in core file of start of register window stack area. */ |
| /* OBSOLETE Don't know if is this any of meaningful, useful or necessary. *x/ */ |
| /* OBSOLETE extern int reg_stack_offset; */ |
| /* OBSOLETE */ |
| /* OBSOLETE #endif /* PYRAMID_CORE *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* Work with core dump and executable files, for GDB. */ |
| /* OBSOLETE This code would be in corefile.c if it weren't machine-dependent. *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE void */ |
| /* OBSOLETE core_file_command (filename, from_tty) */ |
| /* OBSOLETE char *filename; */ |
| /* OBSOLETE int from_tty; */ |
| /* OBSOLETE { */ |
| /* OBSOLETE int val; */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* Discard all vestiges of any previous core file */ |
| /* OBSOLETE and mark data and stack spaces as empty. *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE if (corefile) */ |
| /* OBSOLETE xfree (corefile); */ |
| /* OBSOLETE corefile = 0; */ |
| /* OBSOLETE */ |
| /* OBSOLETE if (corechan >= 0) */ |
| /* OBSOLETE close (corechan); */ |
| /* OBSOLETE corechan = -1; */ |
| /* OBSOLETE */ |
| /* OBSOLETE data_start = 0; */ |
| /* OBSOLETE data_end = 0; */ |
| /* OBSOLETE stack_start = STACK_END_ADDR; */ |
| /* OBSOLETE stack_end = STACK_END_ADDR; */ |
| /* OBSOLETE */ |
| /* OBSOLETE #ifdef PYRAMID_CORE */ |
| /* OBSOLETE reg_stack_start = CONTROL_STACK_ADDR; */ |
| /* OBSOLETE reg_stack_end = CONTROL_STACK_ADDR; /* this isn't strictly true...*x/ */ |
| /* OBSOLETE #endif /* PYRAMID_CORE *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* Now, if a new core file was specified, open it and digest it. *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE if (filename) */ |
| /* OBSOLETE { */ |
| /* OBSOLETE filename = tilde_expand (filename); */ |
| /* OBSOLETE make_cleanup (xfree, filename); */ |
| /* OBSOLETE */ |
| /* OBSOLETE if (have_inferior_p ()) */ |
| /* OBSOLETE error ("To look at a core file, you must kill the program with \"kill\"."); */ |
| /* OBSOLETE corechan = open (filename, O_RDONLY, 0); */ |
| /* OBSOLETE if (corechan < 0) */ |
| /* OBSOLETE perror_with_name (filename); */ |
| /* OBSOLETE /* 4.2-style (and perhaps also sysV-style) core dump file. *x/ */ |
| /* OBSOLETE { */ |
| /* OBSOLETE struct user u; */ |
| /* OBSOLETE */ |
| /* OBSOLETE unsigned int reg_offset; */ |
| /* OBSOLETE */ |
| /* OBSOLETE val = myread (corechan, &u, sizeof u); */ |
| /* OBSOLETE if (val < 0) */ |
| /* OBSOLETE perror_with_name ("Not a core file: reading upage"); */ |
| /* OBSOLETE if (val != sizeof u) */ |
| /* OBSOLETE error ("Not a core file: could only read %d bytes", val); */ |
| /* OBSOLETE data_start = exec_data_start; */ |
| /* OBSOLETE */ |
| /* OBSOLETE data_end = data_start + NBPG * u.u_dsize; */ |
| /* OBSOLETE data_offset = NBPG * UPAGES; */ |
| /* OBSOLETE stack_offset = NBPG * (UPAGES + u.u_dsize); */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* find registers in core file *x/ */ |
| /* OBSOLETE #ifdef PYRAMID_PTRACE */ |
| /* OBSOLETE stack_start = stack_end - NBPG * u.u_ussize; */ |
| /* OBSOLETE reg_stack_offset = stack_offset + (NBPG *u.u_ussize); */ |
| /* OBSOLETE reg_stack_end = reg_stack_start + NBPG * u.u_cssize; */ |
| /* OBSOLETE */ |
| /* OBSOLETE last_frame_address = ((int) u.u_pcb.pcb_csp); */ |
| /* OBSOLETE last_frame_offset = reg_stack_offset + last_frame_address */ |
| /* OBSOLETE - CONTROL_STACK_ADDR ; */ |
| /* OBSOLETE global_reg_offset = (char *)&u - (char *)&u.u_pcb.pcb_gr0 ; */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* skip any control-stack frames that were executed in the */ |
| /* OBSOLETE kernel. *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE while (1) { */ |
| /* OBSOLETE char buf[4]; */ |
| /* OBSOLETE val = lseek (corechan, last_frame_offset+(47*4), 0); */ |
| /* OBSOLETE if (val < 0) */ |
| /* OBSOLETE perror_with_name (filename); */ |
| /* OBSOLETE val = myread (corechan, buf, sizeof buf); */ |
| /* OBSOLETE if (val < 0) */ |
| /* OBSOLETE perror_with_name (filename); */ |
| /* OBSOLETE */ |
| /* OBSOLETE if (*(int *)buf >= 0) */ |
| /* OBSOLETE break; */ |
| /* OBSOLETE printf_unfiltered ("skipping frame %s\n", local_hex_string (last_frame_address)); */ |
| /* OBSOLETE last_frame_offset -= CONTROL_STACK_FRAME_SIZE; */ |
| /* OBSOLETE last_frame_address -= CONTROL_STACK_FRAME_SIZE; */ |
| /* OBSOLETE } */ |
| /* OBSOLETE reg_offset = last_frame_offset; */ |
| /* OBSOLETE */ |
| /* OBSOLETE #if 1 || defined(PYRAMID_CONTROL_FRAME_DEBUGGING) */ |
| /* OBSOLETE printf_unfiltered ("Control stack pointer = %s\n", */ |
| /* OBSOLETE local_hex_string (u.u_pcb.pcb_csp)); */ |
| /* OBSOLETE printf_unfiltered ("offset to control stack %d outermost frame %d (%s)\n", */ |
| /* OBSOLETE reg_stack_offset, reg_offset, local_hex_string (last_frame_address)); */ |
| /* OBSOLETE #endif /* PYRAMID_CONTROL_FRAME_DEBUGGING *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE #else /* not PYRAMID_CORE *x/ */ |
| /* OBSOLETE stack_start = stack_end - NBPG * u.u_ssize; */ |
| /* OBSOLETE reg_offset = (int) u.u_ar0 - KERNEL_U_ADDR; */ |
| /* OBSOLETE #endif /* not PYRAMID_CORE *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE #ifdef __not_on_pyr_yet */ |
| /* OBSOLETE /* Some machines put an absolute address in here and some put */ |
| /* OBSOLETE the offset in the upage of the regs. *x/ */ |
| /* OBSOLETE reg_offset = (int) u.u_ar0; */ |
| /* OBSOLETE if (reg_offset > NBPG * UPAGES) */ |
| /* OBSOLETE reg_offset -= KERNEL_U_ADDR; */ |
| /* OBSOLETE #endif */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* I don't know where to find this info. */ |
| /* OBSOLETE So, for now, mark it as not available. *x/ */ |
| /* OBSOLETE N_SET_MAGIC (core_aouthdr, 0); */ |
| /* OBSOLETE */ |
| /* OBSOLETE /* Read the register values out of the core file and store */ |
| /* OBSOLETE them where `read_register' will find them. *x/ */ |
| /* OBSOLETE */ |
| /* OBSOLETE { */ |
| /* OBSOLETE register int regno; */ |
| /* OBSOLETE */ |
| /* OBSOLETE for (regno = 0; regno < 64; regno++) */ |
| /* OBSOLETE { */ |
| /* OBSOLETE char buf[MAX_REGISTER_RAW_SIZE]; */ |
| /* OBSOLETE */ |
| /* OBSOLETE val = lseek (corechan, register_addr (regno, reg_offset), 0); */ |
| /* OBSOLETE if (val < 0 */ |
| /* OBSOLETE || (val = myread (corechan, buf, sizeof buf)) < 0) */ |
| /* OBSOLETE { */ |
| /* OBSOLETE char * buffer = (char *) alloca (strlen (REGISTER_NAME (regno)) */ |
| /* OBSOLETE + 30); */ |
| /* OBSOLETE strcpy (buffer, "Reading register "); */ |
| /* OBSOLETE strcat (buffer, REGISTER_NAME (regno)); */ |
| /* OBSOLETE */ |
| /* OBSOLETE perror_with_name (buffer); */ |
| /* OBSOLETE } */ |
| /* OBSOLETE */ |
| /* OBSOLETE if (val < 0) */ |
| /* OBSOLETE perror_with_name (filename); */ |
| /* OBSOLETE #ifdef PYRAMID_CONTROL_FRAME_DEBUGGING */ |
| /* OBSOLETE printf_unfiltered ("[reg %s(%d), offset in file %s=0x%0x, addr =0x%0x, =%0x]\n", */ |
| /* OBSOLETE REGISTER_NAME (regno), regno, filename, */ |
| /* OBSOLETE register_addr(regno, reg_offset), */ |
| /* OBSOLETE regno * 4 + last_frame_address, */ |
| /* OBSOLETE *((int *)buf)); */ |
| /* OBSOLETE #endif /* PYRAMID_CONTROL_FRAME_DEBUGGING *x/ */ |
| /* OBSOLETE supply_register (regno, buf); */ |
| /* OBSOLETE } */ |
| /* OBSOLETE } */ |
| /* OBSOLETE } */ |
| /* OBSOLETE if (filename[0] == '/') */ |
| /* OBSOLETE corefile = savestring (filename, strlen (filename)); */ |
| /* OBSOLETE else */ |
| /* OBSOLETE { */ |
| /* OBSOLETE corefile = concat (current_directory, "/", filename, NULL); */ |
| /* OBSOLETE } */ |
| /* OBSOLETE */ |
| /* OBSOLETE #if 1 || defined(PYRAMID_CONTROL_FRAME_DEBUGGING) */ |
| /* OBSOLETE printf_unfiltered ("Providing CSP (%s) as nominal address of current frame.\n", */ |
| /* OBSOLETE local_hex_string(last_frame_address)); */ |
| /* OBSOLETE #endif PYRAMID_CONTROL_FRAME_DEBUGGING */ |
| /* OBSOLETE /* FIXME: Which of the following is correct? *x/ */ |
| /* OBSOLETE #if 0 */ |
| /* OBSOLETE set_current_frame ( create_new_frame (read_register (FP_REGNUM), */ |
| /* OBSOLETE read_pc ())); */ |
| /* OBSOLETE #else */ |
| /* OBSOLETE set_current_frame ( create_new_frame (last_frame_address, */ |
| /* OBSOLETE read_pc ())); */ |
| /* OBSOLETE #endif */ |
| /* OBSOLETE */ |
| /* OBSOLETE select_frame (get_current_frame (), 0); */ |
| /* OBSOLETE validate_files (); */ |
| /* OBSOLETE } */ |
| /* OBSOLETE else if (from_tty) */ |
| /* OBSOLETE printf_unfiltered ("No core file now.\n"); */ |
| /* OBSOLETE } */ |
