diff options
Diffstat (limited to 'gdb/go32-nat.c')
| -rw-r--r-- | gdb/go32-nat.c | 2099 |
1 files changed, 442 insertions, 1657 deletions
diff --git a/gdb/go32-nat.c b/gdb/go32-nat.c index d4744a8b5c4..782d240805b 100644 --- a/gdb/go32-nat.c +++ b/gdb/go32-nat.c @@ -1,302 +1,214 @@ /* Native debugging support for Intel x86 running DJGPP. - Copyright (C) 1997, 1999, 2000, 2001, 2005, 2006, 2007, 2008 - Free Software Foundation, Inc. + Copyright 1997, 1999 Free Software Foundation, Inc. Written by Robert Hoehne. - This file is part of GDB. +This file is part of GDB. - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. - You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. */ +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <fcntl.h> #include "defs.h" +#include "frame.h" /* required by inferior.h */ #include "inferior.h" -#include "gdb_wait.h" +#include "target.h" +#include "wait.h" #include "gdbcore.h" #include "command.h" -#include "gdbcmd.h" #include "floatformat.h" -#include "buildsym.h" -#include "i387-tdep.h" -#include "i386-tdep.h" -#include "value.h" -#include "regcache.h" -#include "gdb_string.h" -#include "top.h" - -#include <stdio.h> /* might be required for __DJGPP_MINOR__ */ + #include <stdlib.h> -#include <ctype.h> -#include <errno.h> +#include <string.h> #include <unistd.h> -#include <sys/utsname.h> -#include <io.h> -#include <dos.h> -#include <dpmi.h> -#include <go32.h> -#include <sys/farptr.h> #include <debug/v2load.h> #include <debug/dbgcom.h> -#if __DJGPP_MINOR__ > 2 -#include <debug/redir.h> -#endif -#if __DJGPP_MINOR__ < 3 -/* This code will be provided from DJGPP 2.03 on. Until then I code it - here */ -typedef struct - { - unsigned short sig0; - unsigned short sig1; - unsigned short sig2; - unsigned short sig3; - unsigned short exponent:15; - unsigned short sign:1; - } -NPXREG; +extern void _initialize_go32_nat (void); + +struct env387 +{ + unsigned short control; + unsigned short r0; + unsigned short status; + unsigned short r1; + unsigned short tag; + unsigned short r2; + unsigned long eip; + unsigned short code_seg; + unsigned short opcode; + unsigned long operand; + unsigned short operand_seg; + unsigned short r3; + unsigned char regs[8][10]; +}; -typedef struct - { - unsigned int control; - unsigned int status; - unsigned int tag; - unsigned int eip; - unsigned int cs; - unsigned int dataptr; - unsigned int datasel; - NPXREG reg[8]; - } -NPX; +extern char **environ; -static NPX npx; +#define SOME_PID 42 -static void save_npx (void); /* Save the FPU of the debugged program */ -static void load_npx (void); /* Restore the FPU of the debugged program */ +/* FIXME add decls of all static functions here */ -/* ------------------------------------------------------------------------- */ -/* Store the contents of the NPX in the global variable `npx'. */ -/* *INDENT-OFF* */ +static int prog_has_started = 0; static void -save_npx (void) +print_387_status (unsigned short status, struct env387 *ep) { - asm ("inb $0xa0, %%al \n\ - testb $0x20, %%al \n\ - jz 1f \n\ - xorb %%al, %%al \n\ - outb %%al, $0xf0 \n\ - movb $0x20, %%al \n\ - outb %%al, $0xa0 \n\ - outb %%al, $0x20 \n\ -1: \n\ - fnsave %0 \n\ - fwait " -: "=m" (npx) -: /* No input */ -: "%eax"); -} + int i; + int bothstatus; + int top; + int fpreg; -/* *INDENT-ON* */ + bothstatus = ((status != 0) && (ep->status != 0)); + if (status != 0) + { + if (bothstatus) + printf_unfiltered ("u: "); + print_387_status_word (status); + } + if (ep->status != 0) + { + if (bothstatus) + printf_unfiltered ("e: "); + print_387_status_word (ep->status); + } -/* ------------------------------------------------------------------------- */ -/* Reload the contents of the NPX from the global variable `npx'. */ + print_387_control_word (ep->control & 0xffff); + printf_unfiltered ("last exception: "); + printf_unfiltered ("opcode %s; ", local_hex_string (ep->opcode)); + printf_unfiltered ("pc %s:", local_hex_string (ep->code_seg)); + printf_unfiltered ("%s; ", local_hex_string (ep->eip)); + printf_unfiltered ("operand %s", local_hex_string (ep->operand_seg)); + printf_unfiltered (":%s\n", local_hex_string (ep->operand)); -static void -load_npx (void) -{ - asm ("frstor %0":"=m" (npx)); -} -/* ------------------------------------------------------------------------- */ -/* Stubs for the missing redirection functions. */ -typedef struct { - char *command; - int redirected; -} cmdline_t; + top = (ep->status >> 11) & 7; -void -redir_cmdline_delete (cmdline_t *ptr) -{ - ptr->redirected = 0; -} + printf_unfiltered ("regno tag msb lsb value\n"); + for (fpreg = 0; fpreg < 8; fpreg++) + { + long double val; -int -redir_cmdline_parse (const char *args, cmdline_t *ptr) -{ - return -1; -} + printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : " ", fpreg); -int -redir_to_child (cmdline_t *ptr) -{ - return 1; -} + switch ((ep->tag >> (fpreg * 2)) & 3) + { + case 0: + printf_unfiltered ("valid "); + break; + case 1: + printf_unfiltered ("zero "); + break; + case 2: + printf_unfiltered ("trap "); + break; + case 3: + printf_unfiltered ("empty "); + break; + } + for (i = 0; i < 8; i++) + printf_unfiltered ("%02x", ep->regs[fpreg][i]); -int -redir_to_debugger (cmdline_t *ptr) -{ - return 1; + REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM + fpreg, builtin_type_long_double, + &ep->regs[fpreg], &val); + + printf_unfiltered (" %LG\n", val); + } } -int -redir_debug_init (cmdline_t *ptr) +void +i386_go32_float_info (void) { - return 0; + print_387_status (0, (struct env387 *) &npx); } -#endif /* __DJGPP_MINOR < 3 */ -typedef enum { wp_insert, wp_remove, wp_count } wp_op; - -/* This holds the current reference counts for each debug register. */ -static int dr_ref_count[4]; - -#define SOME_PID 42 - -static int prog_has_started = 0; -static void go32_open (char *name, int from_tty); -static void go32_close (int quitting); -static void go32_attach (char *args, int from_tty); -static void go32_detach (char *args, int from_tty); -static void go32_resume (ptid_t ptid, int step, - enum target_signal siggnal); -static ptid_t go32_wait (ptid_t ptid, - struct target_waitstatus *status); -static void go32_fetch_registers (struct regcache *, int regno); -static void store_register (const struct regcache *, int regno); -static void go32_store_registers (struct regcache *, int regno); -static void go32_prepare_to_store (struct regcache *); -static int go32_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, - int write, - struct mem_attrib *attrib, - struct target_ops *target); -static void go32_files_info (struct target_ops *target); -static void go32_stop (ptid_t); -static void go32_kill_inferior (void); -static void go32_create_inferior (char *exec_file, char *args, char **env, int from_tty); -static void go32_mourn_inferior (void); -static int go32_can_run (void); - -static struct target_ops go32_ops; -static void go32_terminal_init (void); -static void go32_terminal_inferior (void); -static void go32_terminal_ours (void); - -#define r_ofs(x) (offsetof(TSS,x)) +#define r_ofs(x) ((int)(&(((TSS *)0)->x))) static struct { - size_t tss_ofs; - size_t size; + int tss_ofs; + int size; } regno_mapping[] = { - {r_ofs (tss_eax), 4}, /* normal registers, from a_tss */ - {r_ofs (tss_ecx), 4}, - {r_ofs (tss_edx), 4}, - {r_ofs (tss_ebx), 4}, - {r_ofs (tss_esp), 4}, - {r_ofs (tss_ebp), 4}, - {r_ofs (tss_esi), 4}, - {r_ofs (tss_edi), 4}, - {r_ofs (tss_eip), 4}, - {r_ofs (tss_eflags), 4}, - {r_ofs (tss_cs), 2}, - {r_ofs (tss_ss), 2}, - {r_ofs (tss_ds), 2}, - {r_ofs (tss_es), 2}, - {r_ofs (tss_fs), 2}, - {r_ofs (tss_gs), 2}, - {0, 10}, /* 8 FP registers, from npx.reg[] */ - {1, 10}, - {2, 10}, - {3, 10}, - {4, 10}, - {5, 10}, - {6, 10}, - {7, 10}, - /* The order of the next 7 registers must be consistent - with their numbering in config/i386/tm-i386.h, which see. */ - {0, 2}, /* control word, from npx */ - {4, 2}, /* status word, from npx */ - {8, 2}, /* tag word, from npx */ - {16, 2}, /* last FP exception CS from npx */ - {12, 4}, /* last FP exception EIP from npx */ - {24, 2}, /* last FP exception operand selector from npx */ - {20, 4}, /* last FP exception operand offset from npx */ - {18, 2} /* last FP opcode from npx */ + r_ofs (tss_eax), 4, + r_ofs (tss_ecx), 4, + r_ofs (tss_edx), 4, + r_ofs (tss_ebx), 4, + r_ofs (tss_esp), 4, + r_ofs (tss_ebp), 4, + r_ofs (tss_esi), 4, + r_ofs (tss_edi), 4, + r_ofs (tss_eip), 4, + r_ofs (tss_eflags), 4, + r_ofs (tss_cs), 2, + r_ofs (tss_ss), 2, + r_ofs (tss_ds), 2, + r_ofs (tss_es), 2, + r_ofs (tss_fs), 2, + r_ofs (tss_gs), 2, + 0, 10, + 1, 10, + 2, 10, + 3, 10, + 4, 10, + 5, 10, + 6, 10, + 7, 10, + 0, 2, + 4, 2, + 8, 2, + 12, 4, + 16, 2, + 20, 4, + 24, 2 }; static struct { int go32_sig; - enum target_signal gdb_sig; + int gdb_sig; } sig_map[] = { - {0, TARGET_SIGNAL_FPE}, - {1, TARGET_SIGNAL_TRAP}, - /* Exception 2 is triggered by the NMI. DJGPP handles it as SIGILL, - but I think SIGBUS is better, since the NMI is usually activated - as a result of a memory parity check failure. */ - {2, TARGET_SIGNAL_BUS}, - {3, TARGET_SIGNAL_TRAP}, - {4, TARGET_SIGNAL_FPE}, - {5, TARGET_SIGNAL_SEGV}, - {6, TARGET_SIGNAL_ILL}, - {7, TARGET_SIGNAL_EMT}, /* no-coprocessor exception */ - {8, TARGET_SIGNAL_SEGV}, - {9, TARGET_SIGNAL_SEGV}, - {10, TARGET_SIGNAL_BUS}, - {11, TARGET_SIGNAL_SEGV}, - {12, TARGET_SIGNAL_SEGV}, - {13, TARGET_SIGNAL_SEGV}, - {14, TARGET_SIGNAL_SEGV}, - {16, TARGET_SIGNAL_FPE}, - {17, TARGET_SIGNAL_BUS}, - {31, TARGET_SIGNAL_ILL}, - {0x1b, TARGET_SIGNAL_INT}, - {0x75, TARGET_SIGNAL_FPE}, - {0x78, TARGET_SIGNAL_ALRM}, - {0x79, TARGET_SIGNAL_INT}, - {0x7a, TARGET_SIGNAL_QUIT}, - {-1, TARGET_SIGNAL_LAST} -}; - -static struct { - enum target_signal gdb_sig; - int djgpp_excepno; -} excepn_map[] = { - {TARGET_SIGNAL_0, -1}, - {TARGET_SIGNAL_ILL, 6}, /* Invalid Opcode */ - {TARGET_SIGNAL_EMT, 7}, /* triggers SIGNOFP */ - {TARGET_SIGNAL_SEGV, 13}, /* GPF */ - {TARGET_SIGNAL_BUS, 17}, /* Alignment Check */ - /* The rest are fake exceptions, see dpmiexcp.c in djlsr*.zip for - details. */ - {TARGET_SIGNAL_TERM, 0x1b}, /* triggers Ctrl-Break type of SIGINT */ - {TARGET_SIGNAL_FPE, 0x75}, - {TARGET_SIGNAL_INT, 0x79}, - {TARGET_SIGNAL_QUIT, 0x7a}, - {TARGET_SIGNAL_ALRM, 0x78}, /* triggers SIGTIMR */ - {TARGET_SIGNAL_PROF, 0x78}, - {TARGET_SIGNAL_LAST, -1} + 0, TARGET_SIGNAL_FPE, + 1, TARGET_SIGNAL_TRAP, + 2, TARGET_SIGNAL_UNKNOWN, + 3, TARGET_SIGNAL_TRAP, + 4, TARGET_SIGNAL_FPE, + 5, TARGET_SIGNAL_SEGV, + 6, TARGET_SIGNAL_ILL, + 7, TARGET_SIGNAL_FPE, + 8, TARGET_SIGNAL_SEGV, + 9, TARGET_SIGNAL_SEGV, + 10, TARGET_SIGNAL_BUS, + 11, TARGET_SIGNAL_SEGV, + 12, TARGET_SIGNAL_SEGV, + 13, TARGET_SIGNAL_ABRT, + 14, TARGET_SIGNAL_SEGV, + 16, TARGET_SIGNAL_FPE, + 31, TARGET_SIGNAL_ILL, + 0x75, TARGET_SIGNAL_FPE, + 0x79, TARGET_SIGNAL_INT, + 0x1b, TARGET_SIGNAL_INT, + -1, -1 }; static void go32_open (char *name, int from_tty) { - printf_unfiltered ("Done. Use the \"run\" command to run the program.\n"); + printf_unfiltered ("Use the `run' command to run go32 programs\n"); } static void @@ -307,9 +219,7 @@ go32_close (int quitting) static void go32_attach (char *args, int from_tty) { - error (_("\ -You cannot attach to a running program on this platform.\n\ -Use the `run' command to run DJGPP programs.")); + printf_unfiltered ("Use the `run' command to run go32 programs\n"); } static void @@ -318,122 +228,24 @@ go32_detach (char *args, int from_tty) } static int resume_is_step; -static int resume_signal = -1; static void -go32_resume (ptid_t ptid, int step, enum target_signal siggnal) -{ - int i; - - resume_is_step = step; - - if (siggnal != TARGET_SIGNAL_0 && siggnal != TARGET_SIGNAL_TRAP) +go32_resume (int pid, int step, enum target_signal siggnal) { - for (i = 0, resume_signal = -1; - excepn_map[i].gdb_sig != TARGET_SIGNAL_LAST; i++) - if (excepn_map[i].gdb_sig == siggnal) - { - resume_signal = excepn_map[i].djgpp_excepno; - break; - } - if (resume_signal == -1) - printf_unfiltered ("Cannot deliver signal %s on this platform.\n", - target_signal_to_name (siggnal)); + resume_is_step = step; } -} - -static char child_cwd[FILENAME_MAX]; -static ptid_t -go32_wait (ptid_t ptid, struct target_waitstatus *status) +static int +go32_wait (int pid, struct target_waitstatus *status) { int i; - unsigned char saved_opcode; - unsigned long INT3_addr = 0; - int stepping_over_INT = 0; - a_tss.tss_eflags &= 0xfeff; /* reset the single-step flag (TF) */ if (resume_is_step) - { - /* If the next instruction is INT xx or INTO, we need to handle - them specially. Intel manuals say that these instructions - reset the single-step flag (a.k.a. TF). However, it seems - that, at least in the DPMI environment, and at least when - stepping over the DPMI interrupt 31h, the problem is having - TF set at all when INT 31h is executed: the debuggee either - crashes (and takes the system with it) or is killed by a - SIGTRAP. - - So we need to emulate single-step mode: we put an INT3 opcode - right after the INT xx instruction, let the debuggee run - until it hits INT3 and stops, then restore the original - instruction which we overwrote with the INT3 opcode, and back - up the debuggee's EIP to that instruction. */ - read_child (a_tss.tss_eip, &saved_opcode, 1); - if (saved_opcode == 0xCD || saved_opcode == 0xCE) - { - unsigned char INT3_opcode = 0xCC; - - INT3_addr - = saved_opcode == 0xCD ? a_tss.tss_eip + 2 : a_tss.tss_eip + 1; - stepping_over_INT = 1; - read_child (INT3_addr, &saved_opcode, 1); - write_child (INT3_addr, &INT3_opcode, 1); - } - else - a_tss.tss_eflags |= 0x0100; /* normal instruction: set TF */ - } - - /* The special value FFFFh in tss_trap indicates to run_child that - tss_irqn holds a signal to be delivered to the debuggee. */ - if (resume_signal <= -1) - { - a_tss.tss_trap = 0; - a_tss.tss_irqn = 0xff; - } + a_tss.tss_eflags |= 0x0100; else - { - a_tss.tss_trap = 0xffff; /* run_child looks for this */ - a_tss.tss_irqn = resume_signal; - } + a_tss.tss_eflags &= 0xfeff; - /* The child might change working directory behind our back. The - GDB users won't like the side effects of that when they work with - relative file names, and GDB might be confused by its current - directory not being in sync with the truth. So we always make a - point of changing back to where GDB thinks is its cwd, when we - return control to the debugger, but restore child's cwd before we - run it. */ - /* Initialize child_cwd, before the first call to run_child and not - in the initialization, so the child get also the changed directory - set with the gdb-command "cd ..." */ - if (!*child_cwd) - /* Initialize child's cwd with the current one. */ - getcwd (child_cwd, sizeof (child_cwd)); - - chdir (child_cwd); - -#if __DJGPP_MINOR__ < 3 - load_npx (); -#endif run_child (); -#if __DJGPP_MINOR__ < 3 - save_npx (); -#endif - - /* Did we step over an INT xx instruction? */ - if (stepping_over_INT && a_tss.tss_eip == INT3_addr + 1) - { - /* Restore the original opcode. */ - a_tss.tss_eip--; /* EIP points *after* the INT3 instruction */ - write_child (a_tss.tss_eip, &saved_opcode, 1); - /* Simulate a TRAP exception. */ - a_tss.tss_irqn = 1; - a_tss.tss_eflags |= 0x0100; - } - - getcwd (child_cwd, sizeof (child_cwd)); /* in case it has changed */ - chdir (current_directory); if (a_tss.tss_irqn == 0x21) { @@ -448,84 +260,91 @@ go32_wait (ptid_t ptid, struct target_waitstatus *status) { if (a_tss.tss_irqn == sig_map[i].go32_sig) { -#if __DJGPP_MINOR__ < 3 if ((status->value.sig = sig_map[i].gdb_sig) != TARGET_SIGNAL_TRAP) status->kind = TARGET_WAITKIND_SIGNALLED; -#else - status->value.sig = sig_map[i].gdb_sig; -#endif break; } } } - return pid_to_ptid (SOME_PID); + return SOME_PID; } static void -fetch_register (struct regcache *regcache, int regno) +go32_fetch_registers (int regno) { - if (regno < gdbarch_fp0_regnum (get_regcache_arch (regcache))) - regcache_raw_supply (regcache, regno, - (char *) &a_tss + regno_mapping[regno].tss_ofs); - else if (i386_fp_regnum_p (regno) || i386_fpc_regnum_p (regno)) - i387_supply_fsave (regcache, regno, &npx); - else - internal_error (__FILE__, __LINE__, - _("Invalid register no. %d in fetch_register."), regno); -} + /*JHW*/ + int end_reg = regno + 1; /* just one reg initially */ -static void -go32_fetch_registers (struct regcache *regcache, int regno) -{ - if (regno >= 0) - fetch_register (regcache, regno); - else + if (regno < 0) /* do the all registers */ { - for (regno = 0; - regno < gdbarch_fp0_regnum (get_regcache_arch (regcache)); - regno++) - fetch_register (regcache, regno); - i387_supply_fsave (regcache, -1, &npx); + regno = 0; /* start at first register */ + /* # regs in table */ + end_reg = sizeof (regno_mapping) / sizeof (regno_mapping[0]); + } + + for (; regno < end_reg; regno++) + { + if (regno < 16) + supply_register (regno, + (char *) &a_tss + regno_mapping[regno].tss_ofs); + else if (regno < 24) + supply_register (regno, + (char *) &npx.reg[regno_mapping[regno].tss_ofs]); + else if (regno < 31) + supply_register (regno, + (char *) &npx.reg + regno_mapping[regno].tss_ofs); + else + { + printf_unfiltered ("Invalid register in go32_fetch_register(%d)", + regno); + exit (1); + } } } static void -store_register (const struct regcache *regcache, int regno) +store_register (int regno) { - if (regno < gdbarch_fp0_regnum (get_regcache_arch (regcache))) - regcache_raw_collect (regcache, regno, - (char *) &a_tss + regno_mapping[regno].tss_ofs); - else if (i386_fp_regnum_p (regno) || i386_fpc_regnum_p (regno)) - i387_collect_fsave (regcache, regno, &npx); + void *rp; + void *v = (void *) ®isters[REGISTER_BYTE (regno)]; + + if (regno < 16) + rp = (char *) &a_tss + regno_mapping[regno].tss_ofs; + else if (regno < 24) + rp = (char *) &npx.reg[regno_mapping[regno].tss_ofs]; + else if (regno > 31) + rp = (char *) &npx + regno_mapping[regno].tss_ofs; else - internal_error (__FILE__, __LINE__, - _("Invalid register no. %d in store_register."), regno); + { + printf_unfiltered ("Invalid register in store_register(%d)", regno); + exit (1); + } + memcpy (rp, v, regno_mapping[regno].size); } static void -go32_store_registers (struct regcache *regcache, int regno) +go32_store_registers (int regno) { - unsigned r; + int r; if (regno >= 0) - store_register (regcache, regno); + store_register (regno); else { - for (r = 0; r < gdbarch_fp0_regnum (get_regcache_arch (regcache)); r++) - store_register (regcache, r); - i387_collect_fsave (regcache, -1, &npx); + for (r = 0; r < sizeof (regno_mapping) / sizeof (regno_mapping[0]); r++) + store_register (r); } } static void -go32_prepare_to_store (struct regcache *regcache) +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) + struct target_ops *target) { if (write) { @@ -551,92 +370,44 @@ go32_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, } } -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"); + printf_unfiltered ("You are running a DJGPP V2 program\n"); } static void -go32_stop (ptid_t ptid) +go32_stop (void) { normal_stop (); cleanup_client (); - inferior_ptid = null_ptid; + inferior_pid = 0; prog_has_started = 0; } static void go32_kill_inferior (void) { - redir_cmdline_delete (&child_cmd); - resume_signal = -1; - resume_is_step = 0; + go32_stop (); unpush_target (&go32_ops); } static void -go32_create_inferior (char *exec_file, char *args, char **env, int from_tty) +go32_create_inferior (char *exec_file, char *args, char **env) { - extern char **environ; jmp_buf start_state; char *cmdline; char **env_save = environ; - size_t cmdlen; - - /* 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 (inferior_ptid); 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); - - cmdlen = strlen (args); - /* v2loadimage passes command lines via DOS memory, so it cannot - possibly handle commands longer than 1MB. */ - if (cmdlen > 1024*1024) - error (_("Command line too long.")); - cmdline = xmalloc (cmdlen + 4); + cmdline = (char *) alloca (strlen (args) + 4); + cmdline[0] = strlen (args); strcpy (cmdline + 1, args); - /* If the command-line length fits into DOS 126-char limits, use the - DOS command tail format; otherwise, tell v2loadimage to pass it - through a buffer in conventional memory. */ - if (cmdlen < 127) - { - cmdline[0] = strlen (args); - cmdline[cmdlen + 1] = 13; - } - else - cmdline[0] = 0xff; /* signal v2loadimage it's a long command */ + cmdline[strlen (args) + 1] = 13; environ = env; @@ -647,31 +418,19 @@ go32_create_inferior (char *exec_file, char *args, char **env, int from_tty) exit (1); } environ = env_save; - xfree (cmdline); edi_init (start_state); -#if __DJGPP_MINOR__ < 3 - save_npx (); -#endif - inferior_ptid = pid_to_ptid (SOME_PID); + inferior_pid = SOME_PID; push_target (&go32_ops); clear_proceed_status (); insert_breakpoints (); - prog_has_started = 1; + proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0); } 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 (); } @@ -682,1226 +441,309 @@ 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) +ignore (void) { - 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) +ignore2 (char *a, int b) { - /* 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."), - safe_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."), - safe_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.deprecated_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; +/* Hardware watchpoint support. */ - /* Initialize child's cwd as empty to be initialized when starting - the child. */ - *child_cwd = 0; +#define DR_STATUS 6 +#define DR_CONTROL 7 +#define DR_ENABLE_SIZE 2 +#define DR_LOCAL_ENABLE_SHIFT 0 +#define DR_GLOBAL_ENABLE_SHIFT 1 +#define DR_LOCAL_SLOWDOWN 0x100 +#define DR_GLOBAL_SLOWDOWN 0x200 +#define DR_CONTROL_SHIFT 16 +#define DR_CONTROL_SIZE 4 +#define DR_RW_READ 0x3 +#define DR_RW_WRITE 0x1 +#define DR_CONTROL_MASK 0xf +#define DR_ENABLE_MASK 0x3 +#define DR_LEN_1 0x0 +#define DR_LEN_2 0x4 +#define DR_LEN_4 0xc - /* 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")); +#define D_REGS edi.dr +#define CONTROL D_REGS[DR_CONTROL] +#define STATUS D_REGS[DR_STATUS] + +#define IS_REG_FREE(index) \ + (!(CONTROL & (3 << (DR_ENABLE_SIZE * index)))) + +#define LOCAL_ENABLE_REG(index) \ + (CONTROL |= (1 << (DR_LOCAL_ENABLE_SHIFT + DR_ENABLE_SIZE * index))) + +#define GLOBAL_ENABLE_REG(index) \ + (CONTROL |= (1 << (DR_GLOBAL_ENABLE_SHIFT + DR_ENABLE_SIZE * index))) + +#define DISABLE_REG(index) \ + (CONTROL &= ~(3 << (DR_ENABLE_SIZE * index))) + +#define SET_LOCAL_EXACT() \ + (CONTROL |= DR_LOCAL_SLOWDOWN) + +#define SET_GLOBAL_EXACT() \ + (CONTROL |= DR_GLOBAL_SLOWDOWN) + +#define SET_BREAK(index,address) \ + do {\ + CONTROL &= ~(DR_CONTROL_MASK << (DR_CONTROL_SHIFT + DR_CONTROL_SIZE * index));\ + D_REGS[index] = address;\ + } while(0) + +#define SET_WATCH(index,address,rw,len) \ + do {\ + SET_BREAK(index,address);\ + CONTROL |= (len | rw) << (DR_CONTROL_SHIFT + DR_CONTROL_SIZE * index);\ + } while (0) + +#define WATCH_HIT(index) \ + (\ + (STATUS & (1 << index)) && \ + (CONTROL & (DR_CONTROL_MASK << (DR_CONTROL_SHIFT + DR_CONTROL_SIZE * index)))\ + ) + +#if 0 /* use debugging macro */ +#define SHOW_DR(text) \ +do { \ + fprintf(stderr,"%08x %08x ",edi.dr[7],edi.dr[6]); \ + fprintf(stderr,"%08x %08x ",edi.dr[0],edi.dr[1]); \ + fprintf(stderr,"%08x %08x ",edi.dr[2],edi.dr[3]); \ + fprintf(stderr,"(%s)\n",#text); \ +} while (0) +#else +#define SHOW_DR(text) do {} while (0) +#endif - /* We are always processing GCC-compiled programs. */ - processing_gcc_compilation = 2; +static int go32_insert_aligned_watchpoint (int pid, CORE_ADDR waddr, + CORE_ADDR addr, int len, int rw); - /* Override the default name of the GDB init file. */ - strcpy (gdbinit, "gdb.ini"); -} +static int go32_insert_nonaligned_watchpoint (int pid, CORE_ADDR waddr, + CORE_ADDR addr, int len, int rw); -unsigned short windows_major, windows_minor; +/* Insert a watchpoint. */ -/* Compute the version Windows reports via Int 2Fh/AX=1600h. */ -static void -go32_get_windows_version(void) +int +go32_insert_watchpoint (int pid, CORE_ADDR addr, int len, int rw) { - __dpmi_regs r; + int ret = go32_insert_aligned_watchpoint (pid, addr, addr, len, rw); - r.x.ax = 0x1600; - __dpmi_int(0x2f, &r); - if (r.h.al > 2 && r.h.al != 0x80 && r.h.al != 0xff - && (r.h.al > 3 || r.h.ah > 0)) - { - windows_major = r.h.al; - windows_minor = r.h.ah; - } - else - windows_major = 0xff; /* meaning no Windows */ + SHOW_DR (insert_watch); + return ret; } -/* A subroutine of go32_sysinfo to display memory info. */ -static void -print_mem (unsigned long datum, const char *header, int in_pages_p) +static int +go32_insert_aligned_watchpoint (int pid, CORE_ADDR waddr, CORE_ADDR addr, + int len, int rw) { - if (datum != 0xffffffffUL) - { - if (in_pages_p) - datum <<= 12; - puts_filtered (header); - if (datum > 1024) - { - printf_filtered ("%lu KB", datum >> 10); - if (datum > 1024 * 1024) - printf_filtered (" (%lu MB)", datum >> 20); - } - else - printf_filtered ("%lu Bytes", datum); - puts_filtered ("\n"); - } -} + int i; + int read_write_bits, len_bits; -/* Display assorted information about the underlying OS. */ -static void -go32_sysinfo (char *arg, int from_tty) -{ - struct utsname u; - char cpuid_vendor[13]; - unsigned cpuid_max = 0, cpuid_eax, cpuid_ebx, cpuid_ecx, cpuid_edx; - unsigned true_dos_version = _get_dos_version (1); - unsigned advertized_dos_version = ((unsigned int)_osmajor << 8) | _osminor; - int dpmi_flags; - char dpmi_vendor_info[129]; - int dpmi_vendor_available = - __dpmi_get_capabilities (&dpmi_flags, dpmi_vendor_info); - __dpmi_version_ret dpmi_version_data; - long eflags; - __dpmi_free_mem_info mem_info; - __dpmi_regs regs; - - cpuid_vendor[0] = '\0'; - if (uname (&u)) - strcpy (u.machine, "Unknown x86"); - else if (u.machine[0] == 'i' && u.machine[1] > 4) + /* Look for a free debug register. */ + for (i = 0; i <= 3; i++) { - /* CPUID with EAX = 0 returns the Vendor ID. */ - __asm__ __volatile__ ("xorl %%ebx, %%ebx;" - "xorl %%ecx, %%ecx;" - "xorl %%edx, %%edx;" - "movl $0, %%eax;" - "cpuid;" - "movl %%ebx, %0;" - "movl %%edx, %1;" - "movl %%ecx, %2;" - "movl %%eax, %3;" - : "=m" (cpuid_vendor[0]), - "=m" (cpuid_vendor[4]), - "=m" (cpuid_vendor[8]), - "=m" (cpuid_max) - : - : "%eax", "%ebx", "%ecx", "%edx"); - cpuid_vendor[12] = '\0'; + if (IS_REG_FREE (i)) + break; } - printf_filtered ("CPU Type.......................%s", u.machine); - if (cpuid_vendor[0]) - printf_filtered (" (%s)", cpuid_vendor); - puts_filtered ("\n"); + /* No more debug registers! */ + if (i > 3) + return -1; - /* CPUID with EAX = 1 returns processor signature and features. */ - if (cpuid_max >= 1) - { - static char *brand_name[] = { - "", - " Celeron", - " III", - " III Xeon", - "", "", "", "", - " 4" - }; - char cpu_string[80]; - char cpu_brand[20]; - unsigned brand_idx; - int intel_p = strcmp (cpuid_vendor, "GenuineIntel") == 0; - int amd_p = strcmp (cpuid_vendor, "AuthenticAMD") == 0; - unsigned cpu_family, cpu_model; - - __asm__ __volatile__ ("movl $1, %%eax;" - "cpuid;" - : "=a" (cpuid_eax), - "=b" (cpuid_ebx), - "=d" (cpuid_edx) - : - : "%ecx"); - brand_idx = cpuid_ebx & 0xff; - cpu_family = (cpuid_eax >> 8) & 0xf; - cpu_model = (cpuid_eax >> 4) & 0xf; - cpu_brand[0] = '\0'; - if (intel_p) - { - if (brand_idx > 0 - && brand_idx < sizeof(brand_name)/sizeof(brand_name[0]) - && *brand_name[brand_idx]) - strcpy (cpu_brand, brand_name[brand_idx]); - else if (cpu_family == 5) - { - if (((cpuid_eax >> 12) & 3) == 0 && cpu_model == 4) - strcpy (cpu_brand, " MMX"); - else if (cpu_model > 1 && ((cpuid_eax >> 12) & 3) == 1) - strcpy (cpu_brand, " OverDrive"); - else if (cpu_model > 1 && ((cpuid_eax >> 12) & 3) == 2) - strcpy (cpu_brand, " Dual"); - } - else if (cpu_family == 6 && cpu_model < 8) - { - switch (cpu_model) - { - case 1: - strcpy (cpu_brand, " Pro"); - break; - case 3: - strcpy (cpu_brand, " II"); - break; - case 5: - strcpy (cpu_brand, " II Xeon"); - break; - case 6: - strcpy (cpu_brand, " Celeron"); - break; - case 7: - strcpy (cpu_brand, " III"); - break; - } - } - } - else if (amd_p) - { - switch (cpu_family) - { - case 4: - strcpy (cpu_brand, "486/5x86"); - break; - case 5: - switch (cpu_model) - { - case 0: - case 1: - case 2: - case 3: - strcpy (cpu_brand, "-K5"); - break; - case 6: - case 7: - strcpy (cpu_brand, "-K6"); - break; - case 8: - strcpy (cpu_brand, "-K6-2"); - break; - case 9: - strcpy (cpu_brand, "-K6-III"); - break; - } - break; - case 6: - switch (cpu_model) - { - case 1: - case 2: - case 4: - strcpy (cpu_brand, " Athlon"); - break; - case 3: - strcpy (cpu_brand, " Duron"); - break; - } - break; - } - } - sprintf (cpu_string, "%s%s Model %d Stepping %d", - intel_p ? "Pentium" : (amd_p ? "AMD" : "ix86"), - cpu_brand, cpu_model, cpuid_eax & 0xf); - printfi_filtered (31, "%s\n", cpu_string); - if (((cpuid_edx & (6 | (0x0d << 23))) != 0) - || ((cpuid_edx & 1) == 0) - || (amd_p && (cpuid_edx & (3 << 30)) != 0)) - { - puts_filtered ("CPU Features..................."); - /* We only list features which might be useful in the DPMI - environment. */ - if ((cpuid_edx & 1) == 0) - puts_filtered ("No FPU "); /* it's unusual to not have an FPU */ - if ((cpuid_edx & (1 << 1)) != 0) - puts_filtered ("VME "); - if ((cpuid_edx & (1 << 2)) != 0) - puts_filtered ("DE "); - if ((cpuid_edx & (1 << 4)) != 0) - puts_filtered ("TSC "); - if ((cpuid_edx & (1 << 23)) != 0) - puts_filtered ("MMX "); - if ((cpuid_edx & (1 << 25)) != 0) - puts_filtered ("SSE "); - if ((cpuid_edx & (1 << 26)) != 0) - puts_filtered ("SSE2 "); - if (amd_p) - { - if ((cpuid_edx & (1 << 31)) != 0) - puts_filtered ("3DNow! "); - if ((cpuid_edx & (1 << 30)) != 0) - puts_filtered ("3DNow!Ext"); - } - puts_filtered ("\n"); - } - } - puts_filtered ("\n"); - printf_filtered ("DOS Version....................%s %s.%s", - _os_flavor, u.release, u.version); - if (true_dos_version != advertized_dos_version) - printf_filtered (" (disguised as v%d.%d)", _osmajor, _osminor); - puts_filtered ("\n"); - if (!windows_major) - go32_get_windows_version (); - if (windows_major != 0xff) - { - const char *windows_flavor; + read_write_bits = ((rw & 1) ? DR_RW_READ : 0) | ((rw & 2) ? DR_RW_WRITE : 0); - printf_filtered ("Windows Version................%d.%02d (Windows ", - windows_major, windows_minor); - switch (windows_major) - { - case 3: - windows_flavor = "3.X"; - break; - case 4: - switch (windows_minor) - { - case 0: - windows_flavor = "95, 95A, or 95B"; - break; - case 3: - windows_flavor = "95B OSR2.1 or 95C OSR2.5"; - break; - case 10: - windows_flavor = "98 or 98 SE"; - break; - case 90: - windows_flavor = "ME"; - break; - default: - windows_flavor = "9X"; - break; - } - break; - default: - windows_flavor = "??"; - break; - } - printf_filtered ("%s)\n", windows_flavor); - } - else if (true_dos_version == 0x532 && advertized_dos_version == 0x500) - printf_filtered ("Windows Version................Windows NT or Windows 2000\n"); - puts_filtered ("\n"); - if (dpmi_vendor_available == 0) - { - /* The DPMI spec says the vendor string should be ASCIIZ, but - I don't trust the vendors to follow that... */ - if (!memchr (&dpmi_vendor_info[2], 0, 126)) - dpmi_vendor_info[128] = '\0'; - printf_filtered ("DPMI Host......................%s v%d.%d (capabilities: %#x)\n", - &dpmi_vendor_info[2], - (unsigned)dpmi_vendor_info[0], - (unsigned)dpmi_vendor_info[1], - ((unsigned)dpmi_flags & 0x7f)); - } - __dpmi_get_version (&dpmi_version_data); - printf_filtered ("DPMI Version...................%d.%02d\n", - dpmi_version_data.major, dpmi_version_data.minor); - printf_filtered ("DPMI Info......................%s-bit DPMI, with%s Virtual Memory support\n", - (dpmi_version_data.flags & 1) ? "32" : "16", - (dpmi_version_data.flags & 4) ? "" : "out"); - printfi_filtered (31, "Interrupts reflected to %s mode\n", - (dpmi_version_data.flags & 2) ? "V86" : "Real"); - printfi_filtered (31, "Processor type: i%d86\n", - dpmi_version_data.cpu); - printfi_filtered (31, "PIC base interrupt: Master: %#x Slave: %#x\n", - dpmi_version_data.master_pic, dpmi_version_data.slave_pic); - - /* a_tss is only initialized when the debuggee is first run. */ - if (prog_has_started) + if (len == 1) + len_bits = DR_LEN_1; + else if (len == 2) { - __asm__ __volatile__ ("pushfl ; popl %0" : "=g" (eflags)); - printf_filtered ("Protection.....................Ring %d (in %s), with%s I/O protection\n", - a_tss.tss_cs & 3, (a_tss.tss_cs & 4) ? "LDT" : "GDT", - (a_tss.tss_cs & 3) > ((eflags >> 12) & 3) ? "" : "out"); + if (addr % 2) + return go32_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw); + len_bits = DR_LEN_2; } - puts_filtered ("\n"); - __dpmi_get_free_memory_information (&mem_info); - print_mem (mem_info.total_number_of_physical_pages, - "DPMI Total Physical Memory.....", 1); - print_mem (mem_info.total_number_of_free_pages, - "DPMI Free Physical Memory......", 1); - print_mem (mem_info.size_of_paging_file_partition_in_pages, - "DPMI Swap Space................", 1); - print_mem (mem_info.linear_address_space_size_in_pages, - "DPMI Total Linear Address Size.", 1); - print_mem (mem_info.free_linear_address_space_in_pages, - "DPMI Free Linear Address Size..", 1); - print_mem (mem_info.largest_available_free_block_in_bytes, - "DPMI Largest Free Memory Block.", 0); - - regs.h.ah = 0x48; - regs.x.bx = 0xffff; - __dpmi_int (0x21, ®s); - print_mem (regs.x.bx << 4, "Free DOS Memory................", 0); - regs.x.ax = 0x5800; - __dpmi_int (0x21, ®s); - if ((regs.x.flags & 1) == 0) + else if (len == 4) { - static const char *dos_hilo[] = { - "Low", "", "", "", "High", "", "", "", "High, then Low" - }; - static const char *dos_fit[] = { - "First", "Best", "Last" - }; - int hilo_idx = (regs.x.ax >> 4) & 0x0f; - int fit_idx = regs.x.ax & 0x0f; - - if (hilo_idx > 8) - hilo_idx = 0; - if (fit_idx > 2) - fit_idx = 0; - printf_filtered ("DOS Memory Allocation..........%s memory, %s fit\n", - dos_hilo[hilo_idx], dos_fit[fit_idx]); - regs.x.ax = 0x5802; - __dpmi_int (0x21, ®s); - if ((regs.x.flags & 1) != 0) - regs.h.al = 0; - printfi_filtered (31, "UMBs %sin DOS memory chain\n", - regs.h.al == 0 ? "not " : ""); + if (addr % 4) + return go32_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw); + len_bits = DR_LEN_4; } -} - -struct seg_descr { - unsigned short limit0 __attribute__((packed)); - unsigned short base0 __attribute__((packed)); - unsigned char base1 __attribute__((packed)); - unsigned stype:5 __attribute__((packed)); - unsigned dpl:2 __attribute__((packed)); - unsigned present:1 __attribute__((packed)); - unsigned limit1:4 __attribute__((packed)); - unsigned available:1 __attribute__((packed)); - unsigned dummy:1 __attribute__((packed)); - unsigned bit32:1 __attribute__((packed)); - unsigned page_granular:1 __attribute__((packed)); - unsigned char base2 __attribute__((packed)); -}; - -struct gate_descr { - unsigned short offset0 __attribute__((packed)); - unsigned short selector __attribute__((packed)); - unsigned param_count:5 __attribute__((packed)); - unsigned dummy:3 __attribute__((packed)); - unsigned stype:5 __attribute__((packed)); - unsigned dpl:2 __attribute__((packed)); - unsigned present:1 __attribute__((packed)); - unsigned short offset1 __attribute__((packed)); -}; - -/* Read LEN bytes starting at logical address ADDR, and put the result - into DEST. Return 1 if success, zero if not. */ -static int -read_memory_region (unsigned long addr, void *dest, size_t len) -{ - unsigned long dos_ds_limit = __dpmi_get_segment_limit (_dos_ds); - int retval = 1; - - /* For the low memory, we can simply use _dos_ds. */ - if (addr <= dos_ds_limit - len) - dosmemget (addr, len, dest); else - { - /* For memory above 1MB we need to set up a special segment to - be able to access that memory. */ - int sel = __dpmi_allocate_ldt_descriptors (1); + return go32_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw); - if (sel <= 0) - retval = 0; - else - { - int access_rights = __dpmi_get_descriptor_access_rights (sel); - size_t segment_limit = len - 1; - - /* Make sure the crucial bits in the descriptor access - rights are set correctly. Some DPMI providers might barf - if we set the segment limit to something that is not an - integral multiple of 4KB pages if the granularity bit is - not set to byte-granular, even though the DPMI spec says - it's the host's responsibility to set that bit correctly. */ - if (len > 1024 * 1024) - { - access_rights |= 0x8000; - /* Page-granular segments should have the low 12 bits of - the limit set. */ - segment_limit |= 0xfff; - } - else - access_rights &= ~0x8000; - - if (__dpmi_set_segment_base_address (sel, addr) != -1 - && __dpmi_set_descriptor_access_rights (sel, access_rights) != -1 - && __dpmi_set_segment_limit (sel, segment_limit) != -1 - /* W2K silently fails to set the segment limit, leaving - it at zero; this test avoids the resulting crash. */ - && __dpmi_get_segment_limit (sel) >= segment_limit) - movedata (sel, 0, _my_ds (), (unsigned)dest, len); - else - retval = 0; - - __dpmi_free_ldt_descriptor (sel); - } - } - return retval; + SET_WATCH (i, addr, read_write_bits, len_bits); + LOCAL_ENABLE_REG (i); + SET_LOCAL_EXACT (); } -/* Get a segment descriptor stored at index IDX in the descriptor - table whose base address is TABLE_BASE. Return the descriptor - type, or -1 if failure. */ static int -get_descriptor (unsigned long table_base, int idx, void *descr) -{ - unsigned long addr = table_base + idx * 8; /* 8 bytes per entry */ - - if (read_memory_region (addr, descr, 8)) - return (int)((struct seg_descr *)descr)->stype; - return -1; -} - -struct dtr_reg { - unsigned short limit __attribute__((packed)); - unsigned long base __attribute__((packed)); -}; - -/* Display a segment descriptor stored at index IDX in a descriptor - table whose type is TYPE and whose base address is BASE_ADDR. If - FORCE is non-zero, display even invalid descriptors. */ -static void -display_descriptor (unsigned type, unsigned long base_addr, int idx, int force) -{ - struct seg_descr descr; - struct gate_descr gate; - - /* Get the descriptor from the table. */ - if (idx == 0 && type == 0) - puts_filtered ("0x000: null descriptor\n"); - else if (get_descriptor (base_addr, idx, &descr) != -1) - { - /* For each type of descriptor table, this has a bit set if the - corresponding type of selectors is valid in that table. */ - static unsigned allowed_descriptors[] = { - 0xffffdafeL, /* GDT */ - 0x0000c0e0L, /* IDT */ - 0xffffdafaL /* LDT */ - }; - - /* If the program hasn't started yet, assume the debuggee will - have the same CPL as the debugger. */ - int cpl = prog_has_started ? (a_tss.tss_cs & 3) : _my_cs () & 3; - unsigned long limit = (descr.limit1 << 16) | descr.limit0; - - if (descr.present - && (allowed_descriptors[type] & (1 << descr.stype)) != 0) - { - printf_filtered ("0x%03x: ", - type == 1 - ? idx : (idx * 8) | (type ? (cpl | 4) : 0)); - if (descr.page_granular) - limit = (limit << 12) | 0xfff; /* big segment: low 12 bit set */ - if (descr.stype == 1 || descr.stype == 2 || descr.stype == 3 - || descr.stype == 9 || descr.stype == 11 - || (descr.stype >= 16 && descr.stype < 32)) - printf_filtered ("base=0x%02x%02x%04x limit=0x%08lx", - descr.base2, descr.base1, descr.base0, limit); - - switch (descr.stype) - { - case 1: - case 3: - printf_filtered (" 16-bit TSS (task %sactive)", - descr.stype == 3 ? "" : "in"); - break; - case 2: - puts_filtered (" LDT"); - break; - case 4: - memcpy (&gate, &descr, sizeof gate); - printf_filtered ("selector=0x%04x offs=0x%04x%04x", - gate.selector, gate.offset1, gate.offset0); - printf_filtered (" 16-bit Call Gate (params=%d)", - gate.param_count); - break; - case 5: - printf_filtered ("TSS selector=0x%04x", descr.base0); - printfi_filtered (16, "Task Gate"); - break; - case 6: - case 7: - memcpy (&gate, &descr, sizeof gate); - printf_filtered ("selector=0x%04x offs=0x%04x%04x", - gate.selector, gate.offset1, gate.offset0); - printf_filtered (" 16-bit %s Gate", - descr.stype == 6 ? "Interrupt" : "Trap"); - break; - case 9: - case 11: - printf_filtered (" 32-bit TSS (task %sactive)", - descr.stype == 3 ? "" : "in"); - break; - case 12: - memcpy (&gate, &descr, sizeof gate); - printf_filtered ("selector=0x%04x offs=0x%04x%04x", - gate.selector, gate.offset1, gate.offset0); - printf_filtered (" 32-bit Call Gate (params=%d)", - gate.param_count); - break; - case 14: - case 15: - memcpy (&gate, &descr, sizeof gate); - printf_filtered ("selector=0x%04x offs=0x%04x%04x", - gate.selector, gate.offset1, gate.offset0); - printf_filtered (" 32-bit %s Gate", - descr.stype == 14 ? "Interrupt" : "Trap"); - break; - case 16: /* data segments */ - case 17: - case 18: - case 19: - case 20: - case 21: - case 22: - case 23: - printf_filtered (" %s-bit Data (%s Exp-%s%s)", - descr.bit32 ? "32" : "16", - descr.stype & 2 ? "Read/Write," : "Read-Only, ", - descr.stype & 4 ? "down" : "up", - descr.stype & 1 ? "" : ", N.Acc"); - break; - case 24: /* code segments */ - case 25: - case 26: - case 27: - case 28: - case 29: - case 30: - case 31: - printf_filtered (" %s-bit Code (%s, %sConf%s)", - descr.bit32 ? "32" : "16", - descr.stype & 2 ? "Exec/Read" : "Exec-Only", - descr.stype & 4 ? "" : "N.", - descr.stype & 1 ? "" : ", N.Acc"); - break; - default: - printf_filtered ("Unknown type 0x%02x", descr.stype); - break; - } - puts_filtered ("\n"); - } - else if (force) - { - printf_filtered ("0x%03x: ", - type == 1 - ? idx : (idx * 8) | (type ? (cpl | 4) : 0)); - if (!descr.present) - puts_filtered ("Segment not present\n"); - else - printf_filtered ("Segment type 0x%02x is invalid in this table\n", - descr.stype); - } - } - else if (force) - printf_filtered ("0x%03x: Cannot read this descriptor\n", idx); -} - -static void -go32_sldt (char *arg, int from_tty) +go32_insert_nonaligned_watchpoint (int pid, CORE_ADDR waddr, CORE_ADDR addr, + int len, int rw) { - struct dtr_reg gdtr; - unsigned short ldtr = 0; - int ldt_idx; - struct seg_descr ldt_descr; - long ldt_entry = -1L; - int cpl = (prog_has_started ? a_tss.tss_cs : _my_cs ()) & 3; - - if (arg && *arg) - { - while (*arg && isspace(*arg)) - arg++; + int align; + int size; + int rv = 0; - if (*arg) - { - ldt_entry = parse_and_eval_long (arg); - if (ldt_entry < 0 - || (ldt_entry & 4) == 0 - || (ldt_entry & 3) != (cpl & 3)) - error (_("Invalid LDT entry 0x%03lx."), (unsigned long)ldt_entry); - } - } - - __asm__ __volatile__ ("sgdt %0" : "=m" (gdtr) : /* no inputs */ ); - __asm__ __volatile__ ("sldt %0" : "=m" (ldtr) : /* no inputs */ ); - ldt_idx = ldtr / 8; - if (ldt_idx == 0) - puts_filtered ("There is no LDT.\n"); - /* LDT's entry in the GDT must have the type LDT, which is 2. */ - else if (get_descriptor (gdtr.base, ldt_idx, &ldt_descr) != 2) - printf_filtered ("LDT is present (at %#x), but unreadable by GDB.\n", - ldt_descr.base0 - | (ldt_descr.base1 << 16) - | (ldt_descr.base2 << 24)); - else - { - unsigned base = - ldt_descr.base0 - | (ldt_descr.base1 << 16) - | (ldt_descr.base2 << 24); - unsigned limit = ldt_descr.limit0 | (ldt_descr.limit1 << 16); - int max_entry; - - if (ldt_descr.page_granular) - /* Page-granular segments must have the low 12 bits of their - limit set. */ - limit = (limit << 12) | 0xfff; - /* LDT cannot have more than 8K 8-byte entries, i.e. more than - 64KB. */ - if (limit > 0xffff) - limit = 0xffff; - - max_entry = (limit + 1) / 8; - - if (ldt_entry >= 0) - { - if (ldt_entry > limit) - error (_("Invalid LDT entry %#lx: outside valid limits [0..%#x]"), - (unsigned long)ldt_entry, limit); - - display_descriptor (ldt_descr.stype, base, ldt_entry / 8, 1); - } - else + static int size_try_array[16] = + { + 1, 1, 1, 1, /* trying size one */ + 2, 1, 2, 1, /* trying size two */ + 2, 1, 2, 1, /* trying size three */ + 4, 1, 2, 1 /* trying size four */ + }; + + while (len > 0) + { + align = addr % 4; + /* Four is the maximum length for 386. */ + size = (len > 4) ? 3 : len - 1; + size = size_try_array[size * 4 + align]; + rv = go32_insert_aligned_watchpoint (pid, waddr, addr, size, rw); + if (rv) { - int i; - - for (i = 0; i < max_entry; i++) - display_descriptor (ldt_descr.stype, base, i, 0); + go32_remove_watchpoint (pid, waddr, size); + return rv; } + addr += size; + len -= size; } + return rv; } -static void -go32_sgdt (char *arg, int from_tty) -{ - struct dtr_reg gdtr; - long gdt_entry = -1L; - int max_entry; - - if (arg && *arg) - { - while (*arg && isspace(*arg)) - arg++; - - if (*arg) - { - gdt_entry = parse_and_eval_long (arg); - if (gdt_entry < 0 || (gdt_entry & 7) != 0) - error (_("Invalid GDT entry 0x%03lx: not an integral multiple of 8."), - (unsigned long)gdt_entry); - } - } - - __asm__ __volatile__ ("sgdt %0" : "=m" (gdtr) : /* no inputs */ ); - max_entry = (gdtr.limit + 1) / 8; - - if (gdt_entry >= 0) - { - if (gdt_entry > gdtr.limit) - error (_("Invalid GDT entry %#lx: outside valid limits [0..%#x]"), - (unsigned long)gdt_entry, gdtr.limit); - - display_descriptor (0, gdtr.base, gdt_entry / 8, 1); - } - else - { - int i; +/* Remove a watchpoint. */ - for (i = 0; i < max_entry; i++) - display_descriptor (0, gdtr.base, i, 0); - } -} - -static void -go32_sidt (char *arg, int from_tty) +int +go32_remove_watchpoint (int pid, CORE_ADDR addr, int len) { - struct dtr_reg idtr; - long idt_entry = -1L; - int max_entry; - - if (arg && *arg) - { - while (*arg && isspace(*arg)) - arg++; - - if (*arg) - { - idt_entry = parse_and_eval_long (arg); - if (idt_entry < 0) - error (_("Invalid (negative) IDT entry %ld."), idt_entry); - } - } - - __asm__ __volatile__ ("sidt %0" : "=m" (idtr) : /* no inputs */ ); - max_entry = (idtr.limit + 1) / 8; - if (max_entry > 0x100) /* no more than 256 entries */ - max_entry = 0x100; - - if (idt_entry >= 0) - { - if (idt_entry > idtr.limit) - error (_("Invalid IDT entry %#lx: outside valid limits [0..%#x]"), - (unsigned long)idt_entry, idtr.limit); - - display_descriptor (1, idtr.base, idt_entry, 1); - } - else - { - int i; - - for (i = 0; i < max_entry; i++) - display_descriptor (1, idtr.base, i, 0); - } -} - -/* Cached linear address of the base of the page directory. For - now, available only under CWSDPMI. Code based on ideas and - suggestions from Charles Sandmann <sandmann@clio.rice.edu>. */ -static unsigned long pdbr; + int i; -static unsigned long -get_cr3 (void) -{ - unsigned offset; - unsigned taskreg; - unsigned long taskbase, cr3; - struct dtr_reg gdtr; - - if (pdbr > 0 && pdbr <= 0xfffff) - return pdbr; - - /* Get the linear address of GDT and the Task Register. */ - __asm__ __volatile__ ("sgdt %0" : "=m" (gdtr) : /* no inputs */ ); - __asm__ __volatile__ ("str %0" : "=m" (taskreg) : /* no inputs */ ); - - /* Task Register is a segment selector for the TSS of the current - task. Therefore, it can be used as an index into the GDT to get - at the segment descriptor for the TSS. To get the index, reset - the low 3 bits of the selector (which give the CPL). Add 2 to the - offset to point to the 3 low bytes of the base address. */ - offset = gdtr.base + (taskreg & 0xfff8) + 2; - - - /* CWSDPMI's task base is always under the 1MB mark. */ - if (offset > 0xfffff) - return 0; - - _farsetsel (_dos_ds); - taskbase = _farnspeekl (offset) & 0xffffffU; - taskbase += _farnspeekl (offset + 2) & 0xff000000U; - if (taskbase > 0xfffff) - return 0; - - /* CR3 (a.k.a. PDBR, the Page Directory Base Register) is stored at - offset 1Ch in the TSS. */ - cr3 = _farnspeekl (taskbase + 0x1c) & ~0xfff; - if (cr3 > 0xfffff) + for (i = 0; i <= 3; i++) { -#if 0 /* not fullly supported yet */ - /* The Page Directory is in UMBs. In that case, CWSDPMI puts - the first Page Table right below the Page Directory. Thus, - the first Page Table's entry for its own address and the Page - Directory entry for that Page Table will hold the same - physical address. The loop below searches the entire UMB - range of addresses for such an occurence. */ - unsigned long addr, pte_idx; - - for (addr = 0xb0000, pte_idx = 0xb0; - pte_idx < 0xff; - addr += 0x1000, pte_idx++) + if (D_REGS[i] == addr) { - if (((_farnspeekl (addr + 4 * pte_idx) & 0xfffff027) == - (_farnspeekl (addr + 0x1000) & 0xfffff027)) - && ((_farnspeekl (addr + 4 * pte_idx + 4) & 0xfffff000) == cr3)) - { - cr3 = addr + 0x1000; - break; - } + DISABLE_REG (i); } -#endif - - if (cr3 > 0xfffff) - cr3 = 0; - } - - return cr3; -} - -/* Return the N'th Page Directory entry. */ -static unsigned long -get_pde (int n) -{ - unsigned long pde = 0; - - if (pdbr && n >= 0 && n < 1024) - { - pde = _farpeekl (_dos_ds, pdbr + 4*n); } - return pde; -} - -/* Return the N'th entry of the Page Table whose Page Directory entry - is PDE. */ -static unsigned long -get_pte (unsigned long pde, int n) -{ - unsigned long pte = 0; + SHOW_DR (remove_watch); - /* pde & 0x80 tests the 4MB page bit. We don't support 4MB - page tables, for now. */ - if ((pde & 1) && !(pde & 0x80) && n >= 0 && n < 1024) - { - pde &= ~0xfff; /* clear non-address bits */ - pte = _farpeekl (_dos_ds, pde + 4*n); - } - return pte; + return 0; } -/* Display a Page Directory or Page Table entry. IS_DIR, if non-zero, - says this is a Page Directory entry. If FORCE is non-zero, display - the entry even if its Present flag is off. OFF is the offset of the - address from the page's base address. */ -static void -display_ptable_entry (unsigned long entry, int is_dir, int force, unsigned off) -{ - if ((entry & 1) != 0) - { - printf_filtered ("Base=0x%05lx000", entry >> 12); - if ((entry & 0x100) && !is_dir) - puts_filtered (" Global"); - if ((entry & 0x40) && !is_dir) - puts_filtered (" Dirty"); - printf_filtered (" %sAcc.", (entry & 0x20) ? "" : "Not-"); - printf_filtered (" %sCached", (entry & 0x10) ? "" : "Not-"); - printf_filtered (" Write-%s", (entry & 8) ? "Thru" : "Back"); - printf_filtered (" %s", (entry & 4) ? "Usr" : "Sup"); - printf_filtered (" Read-%s", (entry & 2) ? "Write" : "Only"); - if (off) - printf_filtered (" +0x%x", off); - puts_filtered ("\n"); - } - else if (force) - printf_filtered ("Page%s not present or not supported; value=0x%lx.\n", - is_dir ? " Table" : "", entry >> 1); -} +/* Check if stopped by a watchpoint. */ -static void -go32_pde (char *arg, int from_tty) +CORE_ADDR +go32_stopped_by_watchpoint (int pid) { - long pde_idx = -1, i; + int i, ret = 0; + int status; - if (arg && *arg) + status = edi.dr[DR_STATUS]; + SHOW_DR (stopped_by); + for (i = 0; i <= 3; i++) { - while (*arg && isspace(*arg)) - arg++; - - if (*arg) + if (WATCH_HIT (i)) { - pde_idx = parse_and_eval_long (arg); - if (pde_idx < 0 || pde_idx >= 1024) - error (_("Entry %ld is outside valid limits [0..1023]."), pde_idx); + SHOW_DR (HIT); + ret = D_REGS[i]; } } + /* this is a hack to GDB. If we stopped at a hardware breakpoint, + the stop_pc must incremented by DECR_PC_AFTER_BREAK. I tried everything + with the DECR_PC_AFTER_HW_BREAK, but nothing works. */ + /* This is probably fixed by jtc's recent patch -sts 2/19/99 */ + if (STATUS && !ret) + stop_pc += DECR_PC_AFTER_BREAK; + STATUS = 0; - pdbr = get_cr3 (); - if (!pdbr) - puts_filtered ("Access to Page Directories is not supported on this system.\n"); - else if (pde_idx >= 0) - display_ptable_entry (get_pde (pde_idx), 1, 1, 0); - else - for (i = 0; i < 1024; i++) - display_ptable_entry (get_pde (i), 1, 0, 0); + return ret; } -/* A helper function to display entries in a Page Table pointed to by - the N'th entry in the Page Directory. If FORCE is non-zero, say - something even if the Page Table is not accessible. */ -static void -display_page_table (long n, int force) -{ - unsigned long pde = get_pde (n); +/* Remove a breakpoint. */ - if ((pde & 1) != 0) - { - int i; - - printf_filtered ("Page Table pointed to by Page Directory entry 0x%lx:\n", n); - for (i = 0; i < 1024; i++) - display_ptable_entry (get_pte (pde, i), 0, 0, 0); - puts_filtered ("\n"); - } - else if (force) - printf_filtered ("Page Table not present; value=0x%lx.\n", pde >> 1); -} - -static void -go32_pte (char *arg, int from_tty) +int +go32_remove_hw_breakpoint (CORE_ADDR addr, CORE_ADDR shadow) { - long pde_idx = -1L, i; - - if (arg && *arg) + int i; + for (i = 0; i <= 3; i++) { - while (*arg && isspace(*arg)) - arg++; - - if (*arg) + if (D_REGS[i] == addr) { - pde_idx = parse_and_eval_long (arg); - if (pde_idx < 0 || pde_idx >= 1024) - error (_("Entry %ld is outside valid limits [0..1023]."), pde_idx); + DISABLE_REG (i); } } - - pdbr = get_cr3 (); - if (!pdbr) - puts_filtered ("Access to Page Tables is not supported on this system.\n"); - else if (pde_idx >= 0) - display_page_table (pde_idx, 1); - else - for (i = 0; i < 1024; i++) - display_page_table (i, 0); + SHOW_DR (remove_hw); + return 0; } -static void -go32_pte_for_address (char *arg, int from_tty) +int +go32_insert_hw_breakpoint (CORE_ADDR addr, CORE_ADDR shadow) { - CORE_ADDR addr = 0, i; + int i; + int read_write_bits, len_bits; + int free_debug_register; + int register_number; - if (arg && *arg) + /* Look for a free debug register. */ + for (i = 0; i <= 3; i++) { - while (*arg && isspace(*arg)) - arg++; - - if (*arg) - addr = parse_and_eval_address (arg); + if (IS_REG_FREE (i)) + break; } - if (!addr) - error_no_arg (_("linear address")); - pdbr = get_cr3 (); - if (!pdbr) - puts_filtered ("Access to Page Tables is not supported on this system.\n"); - else - { - int pde_idx = (addr >> 22) & 0x3ff; - int pte_idx = (addr >> 12) & 0x3ff; - unsigned offs = addr & 0xfff; + /* No more debug registers! */ + if (i > 3) + return -1; - printf_filtered ("Page Table entry for address 0x%llx:\n", - (unsigned long long)addr); - display_ptable_entry (get_pte (get_pde (pde_idx), pte_idx), 0, 1, offs); - } + SET_BREAK (i, addr); + LOCAL_ENABLE_REG (i); + SHOW_DR (insert_hw); + + return 0; } -static struct cmd_list_element *info_dos_cmdlist = NULL; +static struct target_ops go32_ops; static void -go32_info_dos_command (char *args, int from_tty) +init_go32_ops (void) { - help_list (info_dos_cmdlist, "info dos ", class_info, gdb_stdout); + 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_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 = ignore; + go32_ops.to_terminal_inferior = ignore; + go32_ops.to_terminal_ours_for_output = ignore; + go32_ops.to_terminal_ours = ignore; + go32_ops.to_terminal_info = ignore2; + 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; } void @@ -1909,61 +751,4 @@ _initialize_go32_nat (void) { init_go32_ops (); add_target (&go32_ops); - - add_prefix_cmd ("dos", class_info, go32_info_dos_command, _("\ -Print information specific to DJGPP (aka MS-DOS) debugging."), - &info_dos_cmdlist, "info dos ", 0, &infolist); - - add_cmd ("sysinfo", class_info, go32_sysinfo, _("\ -Display information about the target system, including CPU, OS, DPMI, etc."), - &info_dos_cmdlist); - add_cmd ("ldt", class_info, go32_sldt, _("\ -Display entries in the LDT (Local Descriptor Table).\n\ -Entry number (an expression) as an argument means display only that entry."), - &info_dos_cmdlist); - add_cmd ("gdt", class_info, go32_sgdt, _("\ -Display entries in the GDT (Global Descriptor Table).\n\ -Entry number (an expression) as an argument means display only that entry."), - &info_dos_cmdlist); - add_cmd ("idt", class_info, go32_sidt, _("\ -Display entries in the IDT (Interrupt Descriptor Table).\n\ -Entry number (an expression) as an argument means display only that entry."), - &info_dos_cmdlist); - add_cmd ("pde", class_info, go32_pde, _("\ -Display entries in the Page Directory.\n\ -Entry number (an expression) as an argument means display only that entry."), - &info_dos_cmdlist); - add_cmd ("pte", class_info, go32_pte, _("\ -Display entries in Page Tables.\n\ -Entry number (an expression) as an argument means display only entries\n\ -from the Page Table pointed to by the specified Page Directory entry."), - &info_dos_cmdlist); - add_cmd ("address-pte", class_info, go32_pte_for_address, _("\ -Display a Page Table entry for a linear address.\n\ -The address argument must be a linear address, after adding to\n\ -it the base address of the appropriate segment.\n\ -The base address of variables and functions in the debuggee's data\n\ -or code segment is stored in the variable __djgpp_base_address,\n\ -so use `__djgpp_base_address + (char *)&var' as the argument.\n\ -For other segments, look up their base address in the output of\n\ -the `info dos ldt' command."), - &info_dos_cmdlist); -} - -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; } |