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[/] [or1k/] [trunk/] [insight/] [gdb/] [sun386-nat.c] - Blame information for rev 1774

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1 578 markom 
/* OBSOLETE /* Native support for Sun 386i's for GDB, the GNU debugger. */
2 
/* OBSOLETE    Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1995, 1999, 2000, 2001 */
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/* OBSOLETE    Free Software Foundation, Inc. */
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/* OBSOLETE    Changes for sun386i by Jean Daniel Fekete (jdf@litp.univ-p6-7.fr), */
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/* OBSOLETE    C2V Paris, April 89. */
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/* OBSOLETE  */
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/* OBSOLETE    This file is part of GDB. */
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/* OBSOLETE  */
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/* OBSOLETE    This program is free software; you can redistribute it and/or modify */
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/* OBSOLETE    it under the terms of the GNU General Public License as published by */
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/* OBSOLETE    the Free Software Foundation; either version 2 of the License, or */
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/* OBSOLETE    (at your option) any later version. */
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/* OBSOLETE  */
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/* OBSOLETE    This program is distributed in the hope that it will be useful, */
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/* OBSOLETE    but WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* OBSOLETE    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the */
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/* OBSOLETE    GNU General Public License for more details. */
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/* OBSOLETE  */
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/* OBSOLETE    You should have received a copy of the GNU General Public License */
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/* OBSOLETE    along with this program; if not, write to the Free Software */
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/* OBSOLETE    Foundation, Inc., 59 Temple Place - Suite 330, */
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/* OBSOLETE    Boston, MA 02111-1307, USA.  */ */
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/* OBSOLETE  */
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/* OBSOLETE #include "defs.h" */
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/* OBSOLETE #include "frame.h" */
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/* OBSOLETE #include "inferior.h" */
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/* OBSOLETE #include "gdbcore.h" */
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/* OBSOLETE #include "regcache.h" */
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/* OBSOLETE  */
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/* OBSOLETE #include <sys/param.h> */
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/* OBSOLETE #include <sys/dir.h> */
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/* OBSOLETE #include <sys/user.h> */
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/* OBSOLETE #include <signal.h> */
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/* OBSOLETE #include <sys/ioctl.h> */
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/* OBSOLETE #include <fcntl.h> */
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/* OBSOLETE  */
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/* OBSOLETE #include <sys/ptrace.h> */
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/* OBSOLETE #include <machine/reg.h> */
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/* OBSOLETE  */
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/* OBSOLETE #include <sys/file.h> */
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/* OBSOLETE #include "gdb_stat.h" */
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/* OBSOLETE #include <sys/core.h> */
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/* OBSOLETE  */
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/* OBSOLETE  */
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/* OBSOLETE /* Machine-dependent code which would otherwise be in corefile.c */ */
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/* OBSOLETE /* Work with core files, for GDB. */ */
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/* OBSOLETE  */
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/* OBSOLETE  */
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/* OBSOLETE void */
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/* OBSOLETE core_file_command (char *filename, int from_tty) */
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/* OBSOLETE { */
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/* OBSOLETE   int val; */
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/* OBSOLETE  */
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/* OBSOLETE   /* Discard all vestiges of any previous core file */
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/* OBSOLETE      and mark data and stack spaces as empty.  */ */
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/* OBSOLETE  */
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/* OBSOLETE   if (corefile) */
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/* OBSOLETE     xfree (corefile); */
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/* OBSOLETE   corefile = 0; */
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/* OBSOLETE  */
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/* OBSOLETE   if (corechan >= 0) */
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/* OBSOLETE     close (corechan); */
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/* OBSOLETE   corechan = -1; */
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/* OBSOLETE  */
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/* OBSOLETE   data_start = 0; */
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/* OBSOLETE   data_end = 0; */
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/* OBSOLETE   stack_start = STACK_END_ADDR; */
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/* OBSOLETE   stack_end = STACK_END_ADDR; */
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/* OBSOLETE  */
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/* OBSOLETE   /* Now, if a new core file was specified, open it and digest it.  */ */
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/* OBSOLETE  */
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/* OBSOLETE   if (filename) */
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/* OBSOLETE     { */
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/* OBSOLETE       filename = tilde_expand (filename); */
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/* OBSOLETE       make_cleanup (xfree, filename); */
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/* OBSOLETE  */
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/* OBSOLETE       if (have_inferior_p ()) */
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/* OBSOLETE     error ("To look at a core file, you must kill the program with \"kill\"."); */
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/* OBSOLETE       corechan = open (filename, O_RDONLY, 0); */
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/* OBSOLETE       if (corechan < 0) */
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/* OBSOLETE     perror_with_name (filename); */
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/* OBSOLETE  */
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/* OBSOLETE       { */
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/* OBSOLETE     struct core corestr; */
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/* OBSOLETE  */
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/* OBSOLETE     val = myread (corechan, &corestr, sizeof corestr); */
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/* OBSOLETE     if (val < 0) */
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/* OBSOLETE       perror_with_name (filename); */
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/* OBSOLETE     if (corestr.c_magic != CORE_MAGIC) */
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/* OBSOLETE       error ("\"%s\" does not appear to be a core dump file (magic 0x%x, expected 0x%x)", */
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/* OBSOLETE              filename, corestr.c_magic, (int) CORE_MAGIC); */
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/* OBSOLETE     else if (sizeof (struct core) != corestr.c_len) */
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/* OBSOLETE         error ("\"%s\" has an invalid struct core length (%d, expected %d)", */
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/* OBSOLETE                filename, corestr.c_len, (int) sizeof (struct core)); */
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/* OBSOLETE  */
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/* OBSOLETE     data_start = exec_data_start; */
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/* OBSOLETE     data_end = data_start + corestr.c_dsize; */
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/* OBSOLETE     stack_start = stack_end - corestr.c_ssize; */
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/* OBSOLETE     data_offset = sizeof corestr; */
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/* OBSOLETE     stack_offset = sizeof corestr + corestr.c_dsize; */
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/* OBSOLETE  */
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/* OBSOLETE     memcpy (registers, &corestr.c_regs, sizeof corestr.c_regs); */
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/* OBSOLETE  */
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/* OBSOLETE     memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)], */
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/* OBSOLETE             corestr.c_fpu.f_fpstatus.f_st, */
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/* OBSOLETE             sizeof corestr.c_fpu.f_fpstatus.f_st); */
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/* OBSOLETE     memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)], */
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/* OBSOLETE             &corestr.c_fpu.f_fpstatus.f_ctrl, */
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/* OBSOLETE             sizeof corestr.c_fpu.f_fpstatus - */
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/* OBSOLETE             sizeof corestr.c_fpu.f_fpstatus.f_st); */
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/* OBSOLETE  */
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/* OBSOLETE     /* the struct aouthdr of sun coff is not the struct exec stored */
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/* OBSOLETE        in the core file. */ */
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/* OBSOLETE     memcpy (&core_aouthdr, &corestr.c_aouthdr, sizeof (struct exec)); */
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/* OBSOLETE #ifndef COFF_ENCAPSULATE */
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/* OBSOLETE     core_aouthdr.magic = corestr.c_aouthdr.a_info; */
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/* OBSOLETE     core_aouthdr.vstamp = /*SUNVERSION */ 31252; */
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/* OBSOLETE #endif */
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/* OBSOLETE     printf_unfiltered ("Core file is from \"%s\".\n", corestr.c_cmdname); */
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/* OBSOLETE     if (corestr.c_signo > 0) */
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/* OBSOLETE       printf_unfiltered ("Program terminated with signal %d, %s.\n", */
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/* OBSOLETE                      corestr.c_signo, safe_strsignal (corestr.c_signo)); */
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/* OBSOLETE       } */
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/* OBSOLETE       if (filename[0] == '/') */
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/* OBSOLETE     corefile = savestring (filename, strlen (filename)); */
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/* OBSOLETE       else */
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/* OBSOLETE     { */
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/* OBSOLETE       corefile = concat (current_directory, "/", filename, NULL); */
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/* OBSOLETE     } */
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/* OBSOLETE  */
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/* OBSOLETE       flush_cached_frames (); */
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/* OBSOLETE       select_frame (get_current_frame (), 0); */
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/* OBSOLETE  */
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/* OBSOLETE       validate_files (); */
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/* OBSOLETE     } */
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/* OBSOLETE   else if (from_tty) */
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/* OBSOLETE     printf_unfiltered ("No core file now.\n"); */
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/* OBSOLETE } */
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/* OBSOLETE  */
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/* OBSOLETE i387_to_double (char *from, char *to) */
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/* OBSOLETE { */
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/* OBSOLETE   long *lp; */
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/* OBSOLETE   /* push extended mode on 387 stack, then pop in double mode */
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/* OBSOLETE  */
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/* OBSOLETE    * first, set exception masks so no error is generated - */
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/* OBSOLETE    * number will be rounded to inf or 0, if necessary  */
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/* OBSOLETE    */ */
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/* OBSOLETE   asm ("pushl %eax");               /* grab a stack slot */ */
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/* OBSOLETE   asm ("fstcw (%esp)");             /* get 387 control word */ */
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/* OBSOLETE   asm ("movl (%esp),%eax"); /* save old value */ */
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/* OBSOLETE   asm ("orl $0x3f,%eax");   /* mask all exceptions */ */
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/* OBSOLETE   asm ("pushl %eax"); */
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/* OBSOLETE   asm ("fldcw (%esp)");             /* load new value into 387 */ */
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/* OBSOLETE  */
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/* OBSOLETE   asm ("movl 8(%ebp),%eax"); */
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/* OBSOLETE   asm ("fldt (%eax)");              /* push extended number on 387 stack */ */
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/* OBSOLETE   asm ("fwait"); */
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/* OBSOLETE   asm ("movl 12(%ebp),%eax"); */
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/* OBSOLETE   asm ("fstpl (%eax)");             /* pop double */ */
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/* OBSOLETE   asm ("fwait"); */
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/* OBSOLETE  */
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/* OBSOLETE   asm ("popl %eax");                /* flush modified control word */ */
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/* OBSOLETE   asm ("fnclex");           /* clear exceptions */ */
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/* OBSOLETE   asm ("fldcw (%esp)");             /* restore original control word */ */
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/* OBSOLETE   asm ("popl %eax");                /* flush saved copy */ */
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/* OBSOLETE } */
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/* OBSOLETE  */
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/* OBSOLETE double_to_i387 (char *from, char *to) */
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/* OBSOLETE { */
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/* OBSOLETE   /* push double mode on 387 stack, then pop in extended mode */
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/* OBSOLETE    * no errors are possible because every 64-bit pattern */
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/* OBSOLETE    * can be converted to an extended */
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/* OBSOLETE    */ */
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/* OBSOLETE   asm ("movl 8(%ebp),%eax"); */
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/* OBSOLETE   asm ("fldl (%eax)"); */
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/* OBSOLETE   asm ("fwait"); */
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/* OBSOLETE   asm ("movl 12(%ebp),%eax"); */
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/* OBSOLETE   asm ("fstpt (%eax)"); */
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/* OBSOLETE   asm ("fwait"); */
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/* OBSOLETE } */
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/* OBSOLETE  */
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/* OBSOLETE void */
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/* OBSOLETE fetch_inferior_registers (int regno) */
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/* OBSOLETE { */
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/* OBSOLETE   struct regs inferior_registers; */
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/* OBSOLETE   struct fp_state inferior_fp_registers; */
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/* OBSOLETE  */
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/* OBSOLETE   registers_fetched (); */
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/* OBSOLETE  */
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/* OBSOLETE   ptrace (PTRACE_GETREGS, PIDGET (inferior_ptid), */
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/* OBSOLETE       (PTRACE_ARG3_TYPE) & inferior_registers); */
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/* OBSOLETE   ptrace (PTRACE_GETFPREGS, PIDGET (inferior_ptid), */
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/* OBSOLETE       (PTRACE_ARG3_TYPE) & inferior_fp_registers); */
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/* OBSOLETE  */
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/* OBSOLETE   memcpy (registers, &inferior_registers, sizeof inferior_registers); */
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/* OBSOLETE  */
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/* OBSOLETE   memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)], inferior_fp_registers.f_st, */
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/* OBSOLETE       sizeof inferior_fp_registers.f_st); */
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/* OBSOLETE   memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)], */
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/* OBSOLETE       &inferior_fp_registers.f_ctrl, */
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/* OBSOLETE       sizeof inferior_fp_registers - sizeof inferior_fp_registers.f_st); */
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/* OBSOLETE } */
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/* OBSOLETE  */
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/* OBSOLETE /* Store our register values back into the inferior. */
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/* OBSOLETE    If REGNO is -1, do this for all registers. */
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/* OBSOLETE    Otherwise, REGNO specifies which register (so we can save time).  */ */
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/* OBSOLETE  */
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/* OBSOLETE void */
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/* OBSOLETE store_inferior_registers (int regno) */
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/* OBSOLETE { */
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/* OBSOLETE   struct regs inferior_registers; */
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/* OBSOLETE   struct fp_state inferior_fp_registers; */
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/* OBSOLETE  */
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/* OBSOLETE   memcpy (&inferior_registers, registers, 20 * 4); */
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/* OBSOLETE  */
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/* OBSOLETE   memcpy (inferior_fp_registers.f_st, */
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/* OBSOLETE       &registers[REGISTER_BYTE (FP0_REGNUM)], */
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/* OBSOLETE       sizeof inferior_fp_registers.f_st); */
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/* OBSOLETE   memcpy (&inferior_fp_registers.f_ctrl, */
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/* OBSOLETE       &registers[REGISTER_BYTE (FPC_REGNUM)], */
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/* OBSOLETE       sizeof inferior_fp_registers - sizeof inferior_fp_registers.f_st); */
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/* OBSOLETE  */
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/* OBSOLETE #ifdef PTRACE_FP_BUG */
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/* OBSOLETE   if (regno == FP_REGNUM || regno == -1) */
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/* OBSOLETE     /* Storing the frame pointer requires a gross hack, in which an */
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/* OBSOLETE        instruction that moves eax into ebp gets single-stepped.  */ */
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/* OBSOLETE     { */
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/* OBSOLETE       int stack = inferior_registers.r_reg[SP_REGNUM]; */
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/* OBSOLETE       int stuff = ptrace (PTRACE_PEEKDATA, PIDGET (inferior_ptid), */
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/* OBSOLETE                       (PTRACE_ARG3_TYPE) stack); */
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/* OBSOLETE       int reg = inferior_registers.r_reg[EAX]; */
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/* OBSOLETE       inferior_registers.r_reg[EAX] = */
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/* OBSOLETE     inferior_registers.r_reg[FP_REGNUM]; */
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/* OBSOLETE       ptrace (PTRACE_SETREGS, PIDGET (inferior_ptid), */
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/* OBSOLETE           (PTRACE_ARG3_TYPE) & inferior_registers); */
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/* OBSOLETE       ptrace (PTRACE_POKEDATA, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) stack, */
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/* OBSOLETE           0xc589); */
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/* OBSOLETE       ptrace (PTRACE_SINGLESTEP, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) stack, */
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/* OBSOLETE           0); */
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/* OBSOLETE       wait (0); */
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/* OBSOLETE       ptrace (PTRACE_POKEDATA, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) stack, */
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/* OBSOLETE           stuff); */
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/* OBSOLETE       inferior_registers.r_reg[EAX] = reg; */
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/* OBSOLETE     } */
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/* OBSOLETE #endif */
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/* OBSOLETE   ptrace (PTRACE_SETREGS, PIDGET (inferior_ptid), */
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/* OBSOLETE       (PTRACE_ARG3_TYPE) & inferior_registers); */
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/* OBSOLETE   ptrace (PTRACE_SETFPREGS, PIDGET (inferior_ptid), */
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/* OBSOLETE       (PTRACE_ARG3_TYPE) & inferior_fp_registers); */
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/* OBSOLETE } */

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