/* Native debugging support for Intel x86 running DJGPP.
- Copyright (C) 1997-2014 Free Software Foundation, Inc.
+ Copyright (C) 1997-2019 Free Software Foundation, Inc.
Written by Robert Hoehne.
This file is part of GDB.
#include <fcntl.h>
-#include "i386-nat.h"
+#include "x86-nat.h"
#include "inferior.h"
+#include "infrun.h"
#include "gdbthread.h"
-#include "gdb_wait.h"
+#include "gdbsupport/gdb_wait.h"
#include "gdbcore.h"
#include "command.h"
#include "gdbcmd.h"
#include "floatformat.h"
-#include "buildsym.h"
+#include "buildsym-legacy.h"
#include "i387-tdep.h"
#include "i386-tdep.h"
-#include "i386-cpuid.h"
+#include "nat/x86-cpuid.h"
#include "value.h"
#include "regcache.h"
-#include <string.h>
#include "top.h"
#include "cli/cli-utils.h"
+#include "inf-child.h"
-#include <stdio.h> /* might be required for __DJGPP_MINOR__ */
-#include <stdlib.h>
#include <ctype.h>
-#include <errno.h>
#include <unistd.h>
#include <sys/utsname.h>
#include <io.h>
#define SOME_PID 42
static int prog_has_started = 0;
-static void go32_mourn_inferior (struct target_ops *ops);
-
-static struct target_ops go32_ops;
#define r_ofs(x) (offsetof(TSS,x))
{GDB_SIGNAL_LAST, -1}
};
-static void
-go32_open (char *name, int from_tty)
-{
- printf_unfiltered ("Done. Use the \"run\" command to run the program.\n");
-}
+/* The go32 target. */
-static void
-go32_close (struct target_ops *self)
+struct go32_nat_target final : public x86_nat_target<inf_child_target>
{
-}
+ void attach (const char *, int) override;
-static void
-go32_attach (struct target_ops *ops, char *args, int from_tty)
+ void resume (ptid_t, int, enum gdb_signal) override;
+
+ ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
+
+ void fetch_registers (struct regcache *, int) override;
+ void store_registers (struct regcache *, int) override;
+
+ enum target_xfer_status xfer_partial (enum target_object object,
+ const char *annex,
+ gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len) override;
+
+ void files_info () override;
+
+ void terminal_init () override;
+
+ void terminal_inferior () override;
+
+ void terminal_ours_for_output () override;
+
+ void terminal_ours () override;
+
+ void terminal_info (const char *, int) override;
+
+ void pass_ctrlc () override;
+
+ void kill () override;
+
+ void create_inferior (const char *, const std::string &,
+ char **, int) override;
+
+ void mourn_inferior () override;
+
+ bool thread_alive (ptid_t ptid) override;
+
+ std::string pid_to_str (ptid_t) override;
+};
+
+static go32_nat_target the_go32_nat_target;
+
+void
+go32_nat_target::attach (const 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."));
}
-static void
-go32_detach (struct target_ops *ops, const char *args, int from_tty)
-{
-}
-
static int resume_is_step;
static int resume_signal = -1;
-static void
-go32_resume (struct target_ops *ops,
- ptid_t ptid, int step, enum gdb_signal siggnal)
+void
+go32_nat_target::resume (ptid_t ptid, int step, enum gdb_signal siggnal)
{
int i;
static char child_cwd[FILENAME_MAX];
-static ptid_t
-go32_wait (struct target_ops *ops,
- ptid_t ptid, struct target_waitstatus *status, int options)
+ptid_t
+go32_nat_target::wait (ptid_t ptid, struct target_waitstatus *status,
+ int options)
{
int i;
unsigned char saved_opcode;
}
getcwd (child_cwd, sizeof (child_cwd)); /* in case it has changed */
- chdir (current_directory);
+ if (current_directory != NULL)
+ chdir (current_directory);
if (a_tss.tss_irqn == 0x21)
{
}
}
}
- return pid_to_ptid (SOME_PID);
+ return ptid_t (SOME_PID);
}
static void
fetch_register (struct regcache *regcache, int regno)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
if (regno < gdbarch_fp0_regnum (gdbarch))
- regcache_raw_supply (regcache, regno,
- (char *) &a_tss + regno_mapping[regno].tss_ofs);
+ regcache->raw_supply (regno,
+ (char *) &a_tss + regno_mapping[regno].tss_ofs);
else if (i386_fp_regnum_p (gdbarch, regno) || i386_fpc_regnum_p (gdbarch,
regno))
i387_supply_fsave (regcache, regno, &npx);
_("Invalid register no. %d in fetch_register."), regno);
}
-static void
-go32_fetch_registers (struct target_ops *ops,
- struct regcache *regcache, int regno)
+void
+go32_nat_target::fetch_registers (struct regcache *regcache, int regno)
{
if (regno >= 0)
fetch_register (regcache, regno);
else
{
for (regno = 0;
- regno < gdbarch_fp0_regnum (get_regcache_arch (regcache));
+ regno < gdbarch_fp0_regnum (regcache->arch ());
regno++)
fetch_register (regcache, regno);
i387_supply_fsave (regcache, -1, &npx);
static void
store_register (const struct regcache *regcache, int regno)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
if (regno < gdbarch_fp0_regnum (gdbarch))
- regcache_raw_collect (regcache, regno,
- (char *) &a_tss + regno_mapping[regno].tss_ofs);
+ regcache->raw_collect (regno,
+ (char *) &a_tss + regno_mapping[regno].tss_ofs);
else if (i386_fp_regnum_p (gdbarch, regno) || i386_fpc_regnum_p (gdbarch,
regno))
i387_collect_fsave (regcache, regno, &npx);
_("Invalid register no. %d in store_register."), regno);
}
-static void
-go32_store_registers (struct target_ops *ops,
- struct regcache *regcache, int regno)
+void
+go32_nat_target::store_registers (struct regcache *regcache, int regno)
{
unsigned r;
store_register (regcache, regno);
else
{
- for (r = 0; r < gdbarch_fp0_regnum (get_regcache_arch (regcache)); r++)
+ for (r = 0; r < gdbarch_fp0_regnum (regcache->arch ()); r++)
store_register (regcache, r);
i387_collect_fsave (regcache, -1, &npx);
}
}
-static void
-go32_prepare_to_store (struct target_ops *self, struct regcache *regcache)
-{
-}
+/* Const-correct version of DJGPP's write_child, which unfortunately
+ takes a non-const buffer pointer. */
static int
-go32_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
- struct mem_attrib *attrib, struct target_ops *target)
+my_write_child (unsigned child_addr, const void *buf, unsigned len)
{
- if (write)
+ static void *buffer = NULL;
+ static unsigned buffer_len = 0;
+ int res;
+
+ if (buffer_len < len)
{
- if (write_child (memaddr, myaddr, len))
- {
- return 0;
- }
- else
- {
- return len;
- }
+ buffer = xrealloc (buffer, len);
+ buffer_len = len;
}
+
+ memcpy (buffer, buf, len);
+ res = write_child (child_addr, buffer, len);
+ return res;
+}
+
+/* Helper for go32_xfer_partial that handles memory transfers.
+ Arguments are like target_xfer_partial. */
+
+static enum target_xfer_status
+go32_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
+{
+ int res;
+
+ if (writebuf != NULL)
+ res = my_write_child (memaddr, writebuf, len);
else
+ res = read_child (memaddr, readbuf, len);
+
+ /* read_child and write_child return zero on success, non-zero on
+ failure. */
+ if (res != 0)
+ return TARGET_XFER_E_IO;
+
+ *xfered_len = len;
+ return TARGET_XFER_OK;
+}
+
+/* Target to_xfer_partial implementation. */
+
+enum target_xfer_status
+go32_nat_target::xfer_partial (enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf, ULONGEST offset,
+ ULONGEST len,
+ ULONGEST *xfered_len)
+{
+ switch (object)
{
- if (read_child (memaddr, myaddr, len))
- {
- return 0;
- }
- else
- {
- return len;
- }
+ case TARGET_OBJECT_MEMORY:
+ return go32_xfer_memory (readbuf, writebuf, offset, len, xfered_len);
+
+ default:
+ return this->beneath ()->xfer_partial (object, annex,
+ readbuf, writebuf, offset, len,
+ xfered_len);
}
}
static cmdline_t child_cmd; /* Parsed child's command line kept here. */
-static void
-go32_files_info (struct target_ops *target)
+void
+go32_nat_target::files_info ()
{
printf_unfiltered ("You are running a DJGPP V2 program.\n");
}
-static void
-go32_kill_inferior (struct target_ops *ops)
+void
+go32_nat_target::kill_inferior ()
{
- go32_mourn_inferior (ops);
+ mourn_inferior ();
}
-static void
-go32_create_inferior (struct target_ops *ops, char *exec_file,
- char *args, char **env, int from_tty)
+void
+go32_nat_target::create_inferior (const char *exec_file,
+ const std::string &allargs,
+ char **env, int from_tty)
{
extern char **environ;
jmp_buf start_state;
char **env_save = environ;
size_t cmdlen;
struct inferior *inf;
+ int result;
+ const char *args = allargs.c_str ();
/* 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 (cmdlen > 1024*1024)
error (_("Command line too long."));
- cmdline = xmalloc (cmdlen + 4);
+ cmdline = (char *) xmalloc (cmdlen + 4);
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
environ = env;
- if (v2loadimage (exec_file, cmdline, start_state))
- {
- environ = env_save;
- printf_unfiltered ("Load failed for image %s\n", exec_file);
- exit (1);
- }
+ result = v2loadimage (exec_file, cmdline, start_state);
+
environ = env_save;
xfree (cmdline);
+ if (result != 0)
+ error (_("Load failed for image %s"), exec_file);
+
edi_init (start_state);
#if __DJGPP_MINOR__ < 3
save_npx ();
#endif
- inferior_ptid = pid_to_ptid (SOME_PID);
+ inferior_ptid = ptid_t (SOME_PID);
inf = current_inferior ();
inferior_appeared (inf, SOME_PID);
- push_target (&go32_ops);
+ if (!target_is_pushed (this))
+ push_target (this);
add_thread_silent (inferior_ptid);
- clear_proceed_status ();
+ clear_proceed_status (0);
insert_breakpoints ();
prog_has_started = 1;
}
-static void
-go32_mourn_inferior (struct target_ops *ops)
+void
+go32_nat_target::mourn_inferior ()
{
ptid_t ptid;
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 ();
+ x86_cleanup_dregs ();
ptid = inferior_ptid;
inferior_ptid = null_ptid;
- delete_thread_silent (ptid);
prog_has_started = 0;
- unpush_target (ops);
generic_mourn_inferior ();
-}
-
-static int
-go32_can_run (void)
-{
- return 1;
+ maybe_unpush_target ();
}
/* Hardware watchpoint support. */
second call will always see GDB's own cooked terminal. */
static int terminal_is_ours = 1;
-static void
-go32_terminal_init (struct target_ops *self)
+void
+go32_nat_target::terminal_init ()
{
inf_mode_valid = 0; /* Reinitialize, in case they are restarting child. */
terminal_is_ours = 1;
}
-static void
-go32_terminal_info (const char *args, int from_tty)
+void
+go32_nat_target::terminal_info (const char *args, int from_tty)
{
printf_unfiltered ("Inferior's terminal is in %s mode.\n",
!inf_mode_valid
#endif
}
-static void
-go32_terminal_inferior (struct target_ops *self)
+void
+go32_nat_target::terminal_inferior ()
{
/* Redirect standard handles as child wants them. */
errno = 0;
}
}
-static void
-go32_terminal_ours (struct target_ops *self)
+void
+go32_nat_target::terminal_ours ()
{
/* Switch to cooked mode on the gdb terminal and save the inferior
terminal mode to be restored when it is resumed. */
}
}
-static int
-go32_thread_alive (struct target_ops *ops, ptid_t ptid)
+void
+go32_nat_target::pass_ctrlc ()
{
- return !ptid_equal (inferior_ptid, null_ptid);
}
-static char *
-go32_pid_to_str (struct target_ops *ops, ptid_t ptid)
+bool
+go32_nat_target::thread_alive (ptid_t ptid)
{
- return normal_pid_to_str (ptid);
+ return ptid != null_ptid;
}
-static void
-init_go32_ops (void)
+std::string
+go32_nat_target::pid_to_str (ptid_t ptid)
{
- 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_thread_alive = go32_thread_alive;
- go32_ops.to_pid_to_str = go32_pid_to_str;
- go32_ops.to_stratum = process_stratum;
- go32_ops.to_has_all_memory = default_child_has_all_memory;
- go32_ops.to_has_memory = default_child_has_memory;
- go32_ops.to_has_stack = default_child_has_stack;
- go32_ops.to_has_registers = default_child_has_registers;
- go32_ops.to_has_execution = default_child_has_execution;
-
- i386_use_watchpoints (&go32_ops);
-
-
- i386_dr_low.set_control = go32_set_dr7;
- i386_dr_low.set_addr = go32_set_dr;
- i386_dr_low.get_status = go32_get_dr6;
- i386_dr_low.get_control = go32_get_dr7;
- i386_dr_low.get_addr = go32_get_dr;
- i386_set_debug_register_length (4);
-
- 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;
+ return normal_pid_to_str (ptid);
}
/* Return the current DOS codepage number. */
/* Display assorted information about the underlying OS. */
static void
-go32_sysinfo (char *arg, int from_tty)
+go32_sysinfo (const char *arg, int from_tty)
{
static const char test_pattern[] =
"deadbeafdeadbeafdeadbeafdeadbeafdeadbeaf"
{
/* CPUID with EAX = 0 returns the Vendor ID. */
#if 0
- /* Ideally we would use i386_cpuid(), but it needs someone to run
+ /* Ideally we would use x86_cpuid(), but it needs someone to run
native tests first to make sure things actually work. They should.
http://sourceware.org/ml/gdb-patches/2013-05/msg00164.html */
unsigned int eax, ebx, ecx, edx;
- if (i386_cpuid (0, &eax, &ebx, &ecx, &edx))
+ if (x86_cpuid (0, &eax, &ebx, &ecx, &edx))
{
cpuid_max = eax;
memcpy (&vendor[0], &ebx, 4);
/* CPUID with EAX = 1 returns processor signature and features. */
if (cpuid_max >= 1)
{
- static char *brand_name[] = {
+ static const char *brand_name[] = {
"",
" Celeron",
" III",
unsigned brand_idx;
int intel_p = strcmp (cpuid_vendor, "GenuineIntel") == 0;
int amd_p = strcmp (cpuid_vendor, "AuthenticAMD") == 0;
+ int hygon_p = strcmp (cpuid_vendor, "HygonGenuine") == 0;
unsigned cpu_family, cpu_model;
#if 0
/* See comment above about cpuid usage. */
- i386_cpuid (1, &cpuid_eax, &cpuid_ebx, NULL, &cpuid_edx);
+ x86_cpuid (1, &cpuid_eax, &cpuid_ebx, NULL, &cpuid_edx);
#else
__asm__ __volatile__ ("movl $1, %%eax;"
"cpuid;"
}
}
xsnprintf (cpu_string, sizeof (cpu_string), "%s%s Model %d Stepping %d",
- intel_p ? "Pentium" : (amd_p ? "AMD" : "ix86"),
+ intel_p ? "Pentium" : (amd_p ? "AMD" : (hygon_p ? "Hygon" : "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))
+ || ((amd_p || hygon_p) && (cpuid_edx & (3 << 30)) != 0))
{
puts_filtered ("CPU Features...................");
/* We only list features which might be useful in the DPMI
puts_filtered ("SSE ");
if ((cpuid_edx & (1 << 26)) != 0)
puts_filtered ("SSE2 ");
- if (amd_p)
+ if (amd_p || hygon_p)
{
if ((cpuid_edx & (1 << 31)) != 0)
puts_filtered ("3DNow! ");
}
static void
-go32_sldt (char *arg, int from_tty)
+go32_sldt (const char *arg, int from_tty)
{
struct dtr_reg gdtr;
unsigned short ldtr = 0;
}
static void
-go32_sgdt (char *arg, int from_tty)
+go32_sgdt (const char *arg, int from_tty)
{
struct dtr_reg gdtr;
long gdt_entry = -1L;
}
static void
-go32_sidt (char *arg, int from_tty)
+go32_sidt (const char *arg, int from_tty)
{
struct dtr_reg idtr;
long idt_entry = -1L;
cr3 = _farnspeekl (taskbase + 0x1c) & ~0xfff;
if (cr3 > 0xfffff)
{
-#if 0 /* Not fullly supported yet. */
+#if 0 /* Not fully 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. */
+ range of addresses for such an occurrence. */
unsigned long addr, pte_idx;
for (addr = 0xb0000, pte_idx = 0xb0;
}
static void
-go32_pde (char *arg, int from_tty)
+go32_pde (const char *arg, int from_tty)
{
long pde_idx = -1, i;
}
static void
-go32_pte (char *arg, int from_tty)
+go32_pte (const char *arg, int from_tty)
{
long pde_idx = -1L, i;
}
static void
-go32_pte_for_address (char *arg, int from_tty)
+go32_pte_for_address (const char *arg, int from_tty)
{
CORE_ADDR addr = 0, i;
static struct cmd_list_element *info_dos_cmdlist = NULL;
static void
-go32_info_dos_command (char *args, int from_tty)
+go32_info_dos_command (const char *args, int from_tty)
{
help_list (info_dos_cmdlist, "info dos ", class_info, gdb_stdout);
}
-/* -Wmissing-prototypes */
-extern initialize_file_ftype _initialize_go32_nat;
-
void
_initialize_go32_nat (void)
{
- init_go32_ops ();
- add_target (&go32_ops);
+ x86_dr_low.set_control = go32_set_dr7;
+ x86_dr_low.set_addr = go32_set_dr;
+ x86_dr_low.get_status = go32_get_dr6;
+ x86_dr_low.get_control = go32_get_dr7;
+ x86_dr_low.get_addr = go32_get_dr;
+ x86_set_debug_register_length (4);
+
+ add_inf_child_target (&the_go32_nat_target);
+
+ /* 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;
add_prefix_cmd ("dos", class_info, go32_info_dos_command, _("\
Print information specific to DJGPP (aka MS-DOS) debugging."),
projects / deliverable / binutils-gdb.git / blobdiff