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3161604405
* config/djgpp/fnchange.lst: Add two new files in the gdb/testsuite/gdb.c++/ directory to the remapped names. * config/djgpp/djconfig.sh (lt_cv_sys_max_cmd_len): Set to 12KB.
905 lines
23 KiB
C
905 lines
23 KiB
C
/* Native debugging support for Intel x86 running DJGPP.
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Copyright 1997, 1999, 2000, 2001 Free Software Foundation, Inc.
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Written by Robert Hoehne.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <fcntl.h>
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#include "defs.h"
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#include "inferior.h"
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#include "gdb_wait.h"
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#include "gdbcore.h"
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#include "command.h"
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#include "floatformat.h"
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#include "buildsym.h"
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#include "i387-nat.h"
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#include "value.h"
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#include "regcache.h"
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#include "gdb_string.h"
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#include <stdio.h> /* required for __DJGPP_MINOR__ */
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <io.h>
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#include <dpmi.h>
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#include <debug/v2load.h>
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#include <debug/dbgcom.h>
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#if __DJGPP_MINOR__ > 2
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#include <debug/redir.h>
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#endif
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#if __DJGPP_MINOR__ < 3
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/* This code will be provided from DJGPP 2.03 on. Until then I code it
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here */
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typedef struct
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{
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unsigned short sig0;
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unsigned short sig1;
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unsigned short sig2;
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unsigned short sig3;
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unsigned short exponent:15;
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unsigned short sign:1;
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}
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NPXREG;
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typedef struct
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{
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unsigned int control;
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unsigned int status;
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unsigned int tag;
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unsigned int eip;
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unsigned int cs;
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unsigned int dataptr;
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unsigned int datasel;
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NPXREG reg[8];
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}
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NPX;
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static NPX npx;
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static void save_npx (void); /* Save the FPU of the debugged program */
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static void load_npx (void); /* Restore the FPU of the debugged program */
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/* ------------------------------------------------------------------------- */
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/* Store the contents of the NPX in the global variable `npx'. */
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/* *INDENT-OFF* */
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static void
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save_npx (void)
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{
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asm ("inb $0xa0, %%al
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testb $0x20, %%al
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jz 1f
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xorb %% al, %%al
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outb %% al, $0xf0
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movb $0x20, %%al
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outb %% al, $0xa0
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outb %% al, $0x20
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1:
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fnsave % 0
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fwait "
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: "=m" (npx)
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: /* No input */
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: "%eax");
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}
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/* *INDENT-ON* */
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/* ------------------------------------------------------------------------- */
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/* Reload the contents of the NPX from the global variable `npx'. */
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static void
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load_npx (void)
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{
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asm ("frstor %0":"=m" (npx));
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}
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/* ------------------------------------------------------------------------- */
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/* Stubs for the missing redirection functions. */
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typedef struct {
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char *command;
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int redirected;
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} cmdline_t;
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void
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redir_cmdline_delete (cmdline_t *ptr)
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{
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ptr->redirected = 0;
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}
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int
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redir_cmdline_parse (const char *args, cmdline_t *ptr)
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{
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return -1;
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}
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int
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redir_to_child (cmdline_t *ptr)
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{
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return 1;
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}
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int
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redir_to_debugger (cmdline_t *ptr)
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{
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return 1;
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}
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int
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redir_debug_init (cmdline_t *ptr)
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{
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return 0;
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}
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#endif /* __DJGPP_MINOR < 3 */
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typedef enum { wp_insert, wp_remove, wp_count } wp_op;
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/* This holds the current reference counts for each debug register. */
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static int dr_ref_count[4];
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#define SOME_PID 42
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static int prog_has_started = 0;
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static void go32_open (char *name, int from_tty);
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static void go32_close (int quitting);
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static void go32_attach (char *args, int from_tty);
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static void go32_detach (char *args, int from_tty);
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static void go32_resume (ptid_t ptid, int step,
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enum target_signal siggnal);
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static ptid_t go32_wait (ptid_t ptid,
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struct target_waitstatus *status);
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static void go32_fetch_registers (int regno);
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static void store_register (int regno);
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static void go32_store_registers (int regno);
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static void go32_prepare_to_store (void);
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static int go32_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
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int write,
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struct mem_attrib *attrib,
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struct target_ops *target);
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static void go32_files_info (struct target_ops *target);
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static void go32_stop (void);
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static void go32_kill_inferior (void);
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static void go32_create_inferior (char *exec_file, char *args, char **env);
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static void go32_mourn_inferior (void);
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static int go32_can_run (void);
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static struct target_ops go32_ops;
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static void go32_terminal_init (void);
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static void go32_terminal_inferior (void);
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static void go32_terminal_ours (void);
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#define r_ofs(x) (offsetof(TSS,x))
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static struct
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{
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size_t tss_ofs;
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size_t size;
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}
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regno_mapping[] =
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{
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{r_ofs (tss_eax), 4}, /* normal registers, from a_tss */
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{r_ofs (tss_ecx), 4},
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{r_ofs (tss_edx), 4},
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{r_ofs (tss_ebx), 4},
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{r_ofs (tss_esp), 4},
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{r_ofs (tss_ebp), 4},
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{r_ofs (tss_esi), 4},
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{r_ofs (tss_edi), 4},
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{r_ofs (tss_eip), 4},
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{r_ofs (tss_eflags), 4},
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{r_ofs (tss_cs), 2},
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{r_ofs (tss_ss), 2},
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{r_ofs (tss_ds), 2},
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{r_ofs (tss_es), 2},
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{r_ofs (tss_fs), 2},
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{r_ofs (tss_gs), 2},
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{0, 10}, /* 8 FP registers, from npx.reg[] */
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{1, 10},
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{2, 10},
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{3, 10},
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{4, 10},
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{5, 10},
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{6, 10},
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{7, 10},
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/* The order of the next 7 registers must be consistent
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with their numbering in config/i386/tm-i386.h, which see. */
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{0, 2}, /* control word, from npx */
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{4, 2}, /* status word, from npx */
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{8, 2}, /* tag word, from npx */
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{16, 2}, /* last FP exception CS from npx */
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{12, 4}, /* last FP exception EIP from npx */
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{24, 2}, /* last FP exception operand selector from npx */
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{20, 4}, /* last FP exception operand offset from npx */
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{18, 2} /* last FP opcode from npx */
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};
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static struct
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{
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int go32_sig;
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enum target_signal gdb_sig;
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}
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sig_map[] =
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{
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{0, TARGET_SIGNAL_FPE},
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{1, TARGET_SIGNAL_TRAP},
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/* Exception 2 is triggered by the NMI. DJGPP handles it as SIGILL,
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but I think SIGBUS is better, since the NMI is usually activated
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as a result of a memory parity check failure. */
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{2, TARGET_SIGNAL_BUS},
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{3, TARGET_SIGNAL_TRAP},
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{4, TARGET_SIGNAL_FPE},
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{5, TARGET_SIGNAL_SEGV},
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{6, TARGET_SIGNAL_ILL},
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{7, TARGET_SIGNAL_EMT}, /* no-coprocessor exception */
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{8, TARGET_SIGNAL_SEGV},
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{9, TARGET_SIGNAL_SEGV},
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{10, TARGET_SIGNAL_BUS},
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{11, TARGET_SIGNAL_SEGV},
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{12, TARGET_SIGNAL_SEGV},
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{13, TARGET_SIGNAL_SEGV},
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{14, TARGET_SIGNAL_SEGV},
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{16, TARGET_SIGNAL_FPE},
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{17, TARGET_SIGNAL_BUS},
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{31, TARGET_SIGNAL_ILL},
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{0x1b, TARGET_SIGNAL_INT},
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{0x75, TARGET_SIGNAL_FPE},
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{0x78, TARGET_SIGNAL_ALRM},
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{0x79, TARGET_SIGNAL_INT},
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{0x7a, TARGET_SIGNAL_QUIT},
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{-1, TARGET_SIGNAL_LAST}
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};
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static struct {
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enum target_signal gdb_sig;
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int djgpp_excepno;
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} excepn_map[] = {
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{TARGET_SIGNAL_0, -1},
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{TARGET_SIGNAL_ILL, 6}, /* Invalid Opcode */
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{TARGET_SIGNAL_EMT, 7}, /* triggers SIGNOFP */
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{TARGET_SIGNAL_SEGV, 13}, /* GPF */
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{TARGET_SIGNAL_BUS, 17}, /* Alignment Check */
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/* The rest are fake exceptions, see dpmiexcp.c in djlsr*.zip for
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details. */
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{TARGET_SIGNAL_TERM, 0x1b}, /* triggers Ctrl-Break type of SIGINT */
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{TARGET_SIGNAL_FPE, 0x75},
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{TARGET_SIGNAL_INT, 0x79},
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{TARGET_SIGNAL_QUIT, 0x7a},
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{TARGET_SIGNAL_ALRM, 0x78}, /* triggers SIGTIMR */
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{TARGET_SIGNAL_PROF, 0x78},
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{TARGET_SIGNAL_LAST, -1}
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};
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static void
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go32_open (char *name, int from_tty)
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{
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printf_unfiltered ("Done. Use the \"run\" command to run the program.\n");
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}
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static void
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go32_close (int quitting)
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{
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}
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static void
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go32_attach (char *args, int from_tty)
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{
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error ("\
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You cannot attach to a running program on this platform.\n\
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Use the `run' command to run DJGPP programs.");
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}
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static void
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go32_detach (char *args, int from_tty)
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{
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}
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static int resume_is_step;
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static int resume_signal = -1;
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static void
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go32_resume (ptid_t ptid, int step, enum target_signal siggnal)
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{
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int i;
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resume_is_step = step;
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if (siggnal != TARGET_SIGNAL_0 && siggnal != TARGET_SIGNAL_TRAP)
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{
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for (i = 0, resume_signal = -1;
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excepn_map[i].gdb_sig != TARGET_SIGNAL_LAST; i++)
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if (excepn_map[i].gdb_sig == siggnal)
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{
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resume_signal = excepn_map[i].djgpp_excepno;
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break;
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}
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if (resume_signal == -1)
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printf_unfiltered ("Cannot deliver signal %s on this platform.\n",
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target_signal_to_name (siggnal));
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}
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}
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static char child_cwd[FILENAME_MAX];
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static ptid_t
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go32_wait (ptid_t ptid, struct target_waitstatus *status)
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{
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int i;
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unsigned char saved_opcode;
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unsigned long INT3_addr = 0;
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int stepping_over_INT = 0;
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a_tss.tss_eflags &= 0xfeff; /* reset the single-step flag (TF) */
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if (resume_is_step)
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{
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/* If the next instruction is INT xx or INTO, we need to handle
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them specially. Intel manuals say that these instructions
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reset the single-step flag (a.k.a. TF). However, it seems
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that, at least in the DPMI environment, and at least when
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stepping over the DPMI interrupt 31h, the problem is having
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TF set at all when INT 31h is executed: the debuggee either
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crashes (and takes the system with it) or is killed by a
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SIGTRAP.
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So we need to emulate single-step mode: we put an INT3 opcode
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right after the INT xx instruction, let the debuggee run
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until it hits INT3 and stops, then restore the original
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instruction which we overwrote with the INT3 opcode, and back
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up the debuggee's EIP to that instruction. */
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read_child (a_tss.tss_eip, &saved_opcode, 1);
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if (saved_opcode == 0xCD || saved_opcode == 0xCE)
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{
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unsigned char INT3_opcode = 0xCC;
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INT3_addr
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= saved_opcode == 0xCD ? a_tss.tss_eip + 2 : a_tss.tss_eip + 1;
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stepping_over_INT = 1;
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read_child (INT3_addr, &saved_opcode, 1);
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write_child (INT3_addr, &INT3_opcode, 1);
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}
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else
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a_tss.tss_eflags |= 0x0100; /* normal instruction: set TF */
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}
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/* The special value FFFFh in tss_trap indicates to run_child that
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tss_irqn holds a signal to be delivered to the debuggee. */
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if (resume_signal <= -1)
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{
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a_tss.tss_trap = 0;
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a_tss.tss_irqn = 0xff;
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}
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else
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{
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a_tss.tss_trap = 0xffff; /* run_child looks for this */
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a_tss.tss_irqn = resume_signal;
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}
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/* The child might change working directory behind our back. The
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GDB users won't like the side effects of that when they work with
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relative file names, and GDB might be confused by its current
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directory not being in sync with the truth. So we always make a
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point of changing back to where GDB thinks is its cwd, when we
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return control to the debugger, but restore child's cwd before we
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run it. */
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/* Initialize child_cwd, before the first call to run_child and not
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in the initialization, so the child get also the changed directory
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set with the gdb-command "cd ..." */
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if (!*child_cwd)
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/* Initialize child's cwd with the current one. */
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getcwd (child_cwd, sizeof (child_cwd));
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chdir (child_cwd);
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#if __DJGPP_MINOR__ < 3
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load_npx ();
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#endif
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run_child ();
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#if __DJGPP_MINOR__ < 3
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save_npx ();
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#endif
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/* Did we step over an INT xx instruction? */
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if (stepping_over_INT && a_tss.tss_eip == INT3_addr + 1)
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{
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/* Restore the original opcode. */
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a_tss.tss_eip--; /* EIP points *after* the INT3 instruction */
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write_child (a_tss.tss_eip, &saved_opcode, 1);
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/* Simulate a TRAP exception. */
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a_tss.tss_irqn = 1;
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a_tss.tss_eflags |= 0x0100;
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}
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getcwd (child_cwd, sizeof (child_cwd)); /* in case it has changed */
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chdir (current_directory);
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if (a_tss.tss_irqn == 0x21)
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{
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status->kind = TARGET_WAITKIND_EXITED;
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status->value.integer = a_tss.tss_eax & 0xff;
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}
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else
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{
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status->value.sig = TARGET_SIGNAL_UNKNOWN;
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status->kind = TARGET_WAITKIND_STOPPED;
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for (i = 0; sig_map[i].go32_sig != -1; i++)
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{
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if (a_tss.tss_irqn == sig_map[i].go32_sig)
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{
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#if __DJGPP_MINOR__ < 3
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if ((status->value.sig = sig_map[i].gdb_sig) !=
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TARGET_SIGNAL_TRAP)
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status->kind = TARGET_WAITKIND_SIGNALLED;
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#else
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status->value.sig = sig_map[i].gdb_sig;
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#endif
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break;
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}
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}
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}
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return pid_to_ptid (SOME_PID);
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}
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static void
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fetch_register (int regno)
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{
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if (regno < FP0_REGNUM)
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supply_register (regno, (char *) &a_tss + regno_mapping[regno].tss_ofs);
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else if (regno <= LAST_FPU_CTRL_REGNUM)
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i387_supply_register (regno, (char *) &npx);
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else
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internal_error (__FILE__, __LINE__,
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"Invalid register no. %d in fetch_register.", regno);
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}
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static void
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go32_fetch_registers (int regno)
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{
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if (regno >= 0)
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fetch_register (regno);
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else
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{
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for (regno = 0; regno < FP0_REGNUM; regno++)
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fetch_register (regno);
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i387_supply_fsave ((char *) &npx);
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}
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}
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static void
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store_register (int regno)
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{
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void *rp;
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void *v = (void *) register_buffer (regno);
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if (regno < FP0_REGNUM)
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memcpy ((char *) &a_tss + regno_mapping[regno].tss_ofs,
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v, regno_mapping[regno].size);
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else if (regno <= LAST_FPU_CTRL_REGNUM)
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i387_fill_fsave ((char *)&npx, regno);
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else
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internal_error (__FILE__, __LINE__,
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"Invalid register no. %d in store_register.", regno);
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}
|
|
|
|
static void
|
|
go32_store_registers (int regno)
|
|
{
|
|
unsigned r;
|
|
|
|
if (regno >= 0)
|
|
store_register (regno);
|
|
else
|
|
{
|
|
for (r = 0; r < FP0_REGNUM; r++)
|
|
store_register (r);
|
|
i387_fill_fsave ((char *) &npx, -1);
|
|
}
|
|
}
|
|
|
|
static void
|
|
go32_prepare_to_store (void)
|
|
{
|
|
}
|
|
|
|
static int
|
|
go32_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
|
|
struct mem_attrib *attrib, struct target_ops *target)
|
|
{
|
|
if (write)
|
|
{
|
|
if (write_child (memaddr, myaddr, len))
|
|
{
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return len;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (read_child (memaddr, myaddr, len))
|
|
{
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return len;
|
|
}
|
|
}
|
|
}
|
|
|
|
static cmdline_t child_cmd; /* parsed child's command line kept here */
|
|
|
|
static void
|
|
go32_files_info (struct target_ops *target)
|
|
{
|
|
printf_unfiltered ("You are running a DJGPP V2 program.\n");
|
|
}
|
|
|
|
static void
|
|
go32_stop (void)
|
|
{
|
|
normal_stop ();
|
|
cleanup_client ();
|
|
inferior_ptid = null_ptid;
|
|
prog_has_started = 0;
|
|
}
|
|
|
|
static void
|
|
go32_kill_inferior (void)
|
|
{
|
|
redir_cmdline_delete (&child_cmd);
|
|
resume_signal = -1;
|
|
resume_is_step = 0;
|
|
unpush_target (&go32_ops);
|
|
}
|
|
|
|
static void
|
|
go32_create_inferior (char *exec_file, char *args, char **env)
|
|
{
|
|
extern char **environ;
|
|
jmp_buf start_state;
|
|
char *cmdline;
|
|
char **env_save = environ;
|
|
|
|
/* If no exec file handed to us, get it from the exec-file command -- with
|
|
a good, common error message if none is specified. */
|
|
if (exec_file == 0)
|
|
exec_file = get_exec_file (1);
|
|
|
|
if (prog_has_started)
|
|
{
|
|
go32_stop ();
|
|
go32_kill_inferior ();
|
|
}
|
|
resume_signal = -1;
|
|
resume_is_step = 0;
|
|
|
|
/* Initialize child's cwd as empty to be initialized when starting
|
|
the child. */
|
|
*child_cwd = 0;
|
|
|
|
/* Init command line storage. */
|
|
if (redir_debug_init (&child_cmd) == -1)
|
|
internal_error (__FILE__, __LINE__,
|
|
"Cannot allocate redirection storage: not enough memory.\n");
|
|
|
|
/* Parse the command line and create redirections. */
|
|
if (strpbrk (args, "<>"))
|
|
{
|
|
if (redir_cmdline_parse (args, &child_cmd) == 0)
|
|
args = child_cmd.command;
|
|
else
|
|
error ("Syntax error in command line.");
|
|
}
|
|
else
|
|
child_cmd.command = xstrdup (args);
|
|
|
|
cmdline = (char *) alloca (strlen (args) + 4);
|
|
cmdline[0] = strlen (args);
|
|
strcpy (cmdline + 1, args);
|
|
cmdline[strlen (args) + 1] = 13;
|
|
|
|
environ = env;
|
|
|
|
if (v2loadimage (exec_file, cmdline, start_state))
|
|
{
|
|
environ = env_save;
|
|
printf_unfiltered ("Load failed for image %s\n", exec_file);
|
|
exit (1);
|
|
}
|
|
environ = env_save;
|
|
|
|
edi_init (start_state);
|
|
#if __DJGPP_MINOR__ < 3
|
|
save_npx ();
|
|
#endif
|
|
|
|
inferior_ptid = pid_to_ptid (SOME_PID);
|
|
push_target (&go32_ops);
|
|
clear_proceed_status ();
|
|
insert_breakpoints ();
|
|
proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
|
|
prog_has_started = 1;
|
|
}
|
|
|
|
static void
|
|
go32_mourn_inferior (void)
|
|
{
|
|
/* We need to make sure all the breakpoint enable bits in the DR7
|
|
register are reset when the inferior exits. Otherwise, if they
|
|
rerun the inferior, the uncleared bits may cause random SIGTRAPs,
|
|
failure to set more watchpoints, and other calamities. It would
|
|
be nice if GDB itself would take care to remove all breakpoints
|
|
at all times, but it doesn't, probably under an assumption that
|
|
the OS cleans up when the debuggee exits. */
|
|
i386_cleanup_dregs ();
|
|
go32_kill_inferior ();
|
|
generic_mourn_inferior ();
|
|
}
|
|
|
|
static int
|
|
go32_can_run (void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/* Hardware watchpoint support. */
|
|
|
|
#define D_REGS edi.dr
|
|
#define CONTROL D_REGS[7]
|
|
#define STATUS D_REGS[6]
|
|
|
|
/* Pass the address ADDR to the inferior in the I'th debug register.
|
|
Here we just store the address in D_REGS, the watchpoint will be
|
|
actually set up when go32_wait runs the debuggee. */
|
|
void
|
|
go32_set_dr (int i, CORE_ADDR addr)
|
|
{
|
|
if (i < 0 || i > 3)
|
|
internal_error (__FILE__, __LINE__,
|
|
"Invalid register %d in go32_set_dr.\n", i);
|
|
D_REGS[i] = addr;
|
|
}
|
|
|
|
/* Pass the value VAL to the inferior in the DR7 debug control
|
|
register. Here we just store the address in D_REGS, the watchpoint
|
|
will be actually set up when go32_wait runs the debuggee. */
|
|
void
|
|
go32_set_dr7 (unsigned val)
|
|
{
|
|
CONTROL = val;
|
|
}
|
|
|
|
/* Get the value of the DR6 debug status register from the inferior.
|
|
Here we just return the value stored in D_REGS, as we've got it
|
|
from the last go32_wait call. */
|
|
unsigned
|
|
go32_get_dr6 (void)
|
|
{
|
|
return STATUS;
|
|
}
|
|
|
|
/* Put the device open on handle FD into either raw or cooked
|
|
mode, return 1 if it was in raw mode, zero otherwise. */
|
|
|
|
static int
|
|
device_mode (int fd, int raw_p)
|
|
{
|
|
int oldmode, newmode;
|
|
__dpmi_regs regs;
|
|
|
|
regs.x.ax = 0x4400;
|
|
regs.x.bx = fd;
|
|
__dpmi_int (0x21, ®s);
|
|
if (regs.x.flags & 1)
|
|
return -1;
|
|
newmode = oldmode = regs.x.dx;
|
|
|
|
if (raw_p)
|
|
newmode |= 0x20;
|
|
else
|
|
newmode &= ~0x20;
|
|
|
|
if (oldmode & 0x80) /* Only for character dev */
|
|
{
|
|
regs.x.ax = 0x4401;
|
|
regs.x.bx = fd;
|
|
regs.x.dx = newmode & 0xff; /* Force upper byte zero, else it fails */
|
|
__dpmi_int (0x21, ®s);
|
|
if (regs.x.flags & 1)
|
|
return -1;
|
|
}
|
|
return (oldmode & 0x20) == 0x20;
|
|
}
|
|
|
|
|
|
static int inf_mode_valid = 0;
|
|
static int inf_terminal_mode;
|
|
|
|
/* This semaphore is needed because, amazingly enough, GDB calls
|
|
target.to_terminal_ours more than once after the inferior stops.
|
|
But we need the information from the first call only, since the
|
|
second call will always see GDB's own cooked terminal. */
|
|
static int terminal_is_ours = 1;
|
|
|
|
static void
|
|
go32_terminal_init (void)
|
|
{
|
|
inf_mode_valid = 0; /* reinitialize, in case they are restarting child */
|
|
terminal_is_ours = 1;
|
|
}
|
|
|
|
static void
|
|
go32_terminal_info (char *args, int from_tty)
|
|
{
|
|
printf_unfiltered ("Inferior's terminal is in %s mode.\n",
|
|
!inf_mode_valid
|
|
? "default" : inf_terminal_mode ? "raw" : "cooked");
|
|
|
|
#if __DJGPP_MINOR__ > 2
|
|
if (child_cmd.redirection)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < DBG_HANDLES; i++)
|
|
{
|
|
if (child_cmd.redirection[i]->file_name)
|
|
printf_unfiltered ("\tFile handle %d is redirected to `%s'.\n",
|
|
i, child_cmd.redirection[i]->file_name);
|
|
else if (_get_dev_info (child_cmd.redirection[i]->inf_handle) == -1)
|
|
printf_unfiltered
|
|
("\tFile handle %d appears to be closed by inferior.\n", i);
|
|
/* Mask off the raw/cooked bit when comparing device info words. */
|
|
else if ((_get_dev_info (child_cmd.redirection[i]->inf_handle) & 0xdf)
|
|
!= (_get_dev_info (i) & 0xdf))
|
|
printf_unfiltered
|
|
("\tFile handle %d appears to be redirected by inferior.\n", i);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
go32_terminal_inferior (void)
|
|
{
|
|
/* Redirect standard handles as child wants them. */
|
|
errno = 0;
|
|
if (redir_to_child (&child_cmd) == -1)
|
|
{
|
|
redir_to_debugger (&child_cmd);
|
|
error ("Cannot redirect standard handles for program: %s.",
|
|
strerror (errno));
|
|
}
|
|
/* set the console device of the inferior to whatever mode
|
|
(raw or cooked) we found it last time */
|
|
if (terminal_is_ours)
|
|
{
|
|
if (inf_mode_valid)
|
|
device_mode (0, inf_terminal_mode);
|
|
terminal_is_ours = 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
go32_terminal_ours (void)
|
|
{
|
|
/* Switch to cooked mode on the gdb terminal and save the inferior
|
|
terminal mode to be restored when it is resumed */
|
|
if (!terminal_is_ours)
|
|
{
|
|
inf_terminal_mode = device_mode (0, 0);
|
|
if (inf_terminal_mode != -1)
|
|
inf_mode_valid = 1;
|
|
else
|
|
/* If device_mode returned -1, we don't know what happens with
|
|
handle 0 anymore, so make the info invalid. */
|
|
inf_mode_valid = 0;
|
|
terminal_is_ours = 1;
|
|
|
|
/* Restore debugger's standard handles. */
|
|
errno = 0;
|
|
if (redir_to_debugger (&child_cmd) == -1)
|
|
{
|
|
redir_to_child (&child_cmd);
|
|
error ("Cannot redirect standard handles for debugger: %s.",
|
|
strerror (errno));
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
init_go32_ops (void)
|
|
{
|
|
go32_ops.to_shortname = "djgpp";
|
|
go32_ops.to_longname = "djgpp target process";
|
|
go32_ops.to_doc =
|
|
"Program loaded by djgpp, when gdb is used as an external debugger";
|
|
go32_ops.to_open = go32_open;
|
|
go32_ops.to_close = go32_close;
|
|
go32_ops.to_attach = go32_attach;
|
|
go32_ops.to_detach = go32_detach;
|
|
go32_ops.to_resume = go32_resume;
|
|
go32_ops.to_wait = go32_wait;
|
|
go32_ops.to_fetch_registers = go32_fetch_registers;
|
|
go32_ops.to_store_registers = go32_store_registers;
|
|
go32_ops.to_prepare_to_store = go32_prepare_to_store;
|
|
go32_ops.to_xfer_memory = go32_xfer_memory;
|
|
go32_ops.to_files_info = go32_files_info;
|
|
go32_ops.to_insert_breakpoint = memory_insert_breakpoint;
|
|
go32_ops.to_remove_breakpoint = memory_remove_breakpoint;
|
|
go32_ops.to_terminal_init = go32_terminal_init;
|
|
go32_ops.to_terminal_inferior = go32_terminal_inferior;
|
|
go32_ops.to_terminal_ours_for_output = go32_terminal_ours;
|
|
go32_ops.to_terminal_ours = go32_terminal_ours;
|
|
go32_ops.to_terminal_info = go32_terminal_info;
|
|
go32_ops.to_kill = go32_kill_inferior;
|
|
go32_ops.to_create_inferior = go32_create_inferior;
|
|
go32_ops.to_mourn_inferior = go32_mourn_inferior;
|
|
go32_ops.to_can_run = go32_can_run;
|
|
go32_ops.to_stop = go32_stop;
|
|
go32_ops.to_stratum = process_stratum;
|
|
go32_ops.to_has_all_memory = 1;
|
|
go32_ops.to_has_memory = 1;
|
|
go32_ops.to_has_stack = 1;
|
|
go32_ops.to_has_registers = 1;
|
|
go32_ops.to_has_execution = 1;
|
|
go32_ops.to_magic = OPS_MAGIC;
|
|
|
|
/* Initialize child's cwd as empty to be initialized when starting
|
|
the child. */
|
|
*child_cwd = 0;
|
|
|
|
/* Initialize child's command line storage. */
|
|
if (redir_debug_init (&child_cmd) == -1)
|
|
internal_error (__FILE__, __LINE__,
|
|
"Cannot allocate redirection storage: not enough memory.\n");
|
|
|
|
/* We are always processing GCC-compiled programs. */
|
|
processing_gcc_compilation = 2;
|
|
}
|
|
|
|
void
|
|
_initialize_go32_nat (void)
|
|
{
|
|
init_go32_ops ();
|
|
add_target (&go32_ops);
|
|
}
|
|
|
|
pid_t
|
|
tcgetpgrp (int fd)
|
|
{
|
|
if (isatty (fd))
|
|
return SOME_PID;
|
|
errno = ENOTTY;
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
tcsetpgrp (int fd, pid_t pgid)
|
|
{
|
|
if (isatty (fd) && pgid == SOME_PID)
|
|
return 0;
|
|
errno = pgid == SOME_PID ? ENOTTY : ENOSYS;
|
|
return -1;
|
|
}
|