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Diffstat (limited to 'gnu/usr.bin/binutils/gdb5/i386/freebsd-nat.c')
-rw-r--r--gnu/usr.bin/binutils/gdb5/i386/freebsd-nat.c672
1 files changed, 0 insertions, 672 deletions
diff --git a/gnu/usr.bin/binutils/gdb5/i386/freebsd-nat.c b/gnu/usr.bin/binutils/gdb5/i386/freebsd-nat.c
deleted file mode 100644
index f309508..0000000
--- a/gnu/usr.bin/binutils/gdb5/i386/freebsd-nat.c
+++ /dev/null
@@ -1,672 +0,0 @@
-/* Native-dependent code for BSD Unix running on i386's, for GDB.
- Copyright 1988, 1989, 1991, 1992, 1994, 1996 Free Software Foundation, Inc.
-
-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 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.
-
-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. */
-
-#ifndef lint
-static const char rcsid[] =
- "$FreeBSD$";
-#endif /* not lint */
-
-#include "defs.h"
-
-#include <sys/types.h>
-#include <sys/ptrace.h>
-#include <machine/reg.h>
-#include <machine/frame.h>
-#include <sys/param.h>
-#include <sys/user.h>
-#include "gdbcore.h"
-#include "value.h"
-#include "inferior.h"
-
-#if defined(HAVE_GREGSET_T) || defined(HAVE_FPREGSET_T)
-#include <sys/procfs.h>
-#endif
-
-/* this table must line up with REGISTER_NAMES in tm-i386v.h */
-/* symbols like 'tEAX' come from <machine/reg.h> */
-static int tregmap[] =
-{
- tEAX, tECX, tEDX, tEBX,
- tESP, tEBP, tESI, tEDI,
- tEIP, tEFLAGS, tCS, tSS,
- tDS, tES, tFS, tGS,
-};
-
-static struct save87 pcb_savefpu;
-
-void
-fetch_inferior_registers (regno)
- int regno;
-{
- struct reg inferior_registers; /* ptrace order, not gcc/gdb order */
- int r;
-
- ptrace (PT_GETREGS, inferior_pid,
- (PTRACE_ARG3_TYPE) &inferior_registers, 0);
-
- for (r = 0; r < NUM_REGS; r++)
- memcpy (&registers[REGISTER_BYTE (r)], ((int *)&inferior_registers) + tregmap[r], 4);
-
- registers_fetched ();
-}
-
-void
-store_inferior_registers (regno)
- int regno;
-{
- struct reg inferior_registers; /* ptrace order, not gcc/gdb order */
- int r;
-
- for (r = 0; r < NUM_REGS; r++)
- memcpy (((int *)&inferior_registers) + tregmap[r], &registers[REGISTER_BYTE (r)], 4);
-
- ptrace (PT_SETREGS, inferior_pid,
- (PTRACE_ARG3_TYPE) &inferior_registers, 0);
-}
-
-/* Extract the register values out of the core file and store
- them where `read_register' will find them.
- Extract the floating point state out of the core file and store
- it where `float_info' will find it.
-
- CORE_REG_SECT points to the register values themselves, read into memory.
- CORE_REG_SIZE is the size of that area.
- WHICH says which set of registers we are handling (0 = int, 2 = float
- on machines where they are discontiguous).
- REG_ADDR is the offset from u.u_ar0 to the register values relative to
- core_reg_sect. This is used with old-fashioned core files to
- locate the registers in a large upage-plus-stack ".reg" section.
- Original upage address X is at location core_reg_sect+x+reg_addr.
- */
-
-static void
-fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
- char *core_reg_sect;
- unsigned core_reg_size;
- int which;
- CORE_ADDR reg_addr;
-{
- register int regno;
- register int cregno;
- register int addr;
- int bad_reg = -1;
- int offset;
- struct user *tmp_uaddr;
-
- /*
- * First get virtual address of user structure. Then calculate offset.
- */
- memcpy(&tmp_uaddr,
- &((struct user *) core_reg_sect)->u_kproc.ki_addr,
- sizeof(tmp_uaddr));
- offset = -reg_addr - (int) tmp_uaddr;
-
- for (regno = 0; regno < NUM_REGS; regno++)
- {
- cregno = tregmap[regno];
- if (cregno == tGS)
- addr = offsetof (struct user, u_pcb) + offsetof (struct pcb, pcb_gs);
- else
- addr = offset + 4 * cregno;
- if (addr < 0 || addr >= core_reg_size)
- {
- if (bad_reg < 0)
- bad_reg = regno;
- }
- else
- {
- supply_register (regno, core_reg_sect + addr);
- }
- }
- if (bad_reg >= 0)
- {
- error ("Register %s not found in core file.", gdb_register_names[bad_reg]);
- }
-
- addr = offsetof (struct user, u_pcb) + offsetof (struct pcb, pcb_savefpu);
- memcpy (&pcb_savefpu, core_reg_sect + addr, sizeof pcb_savefpu);
-}
-
-#ifdef FLOAT_INFO
-#include "expression.h"
-#include "language.h" /* for local_hex_string */
-#include "floatformat.h"
-
-#include <sys/param.h>
-#include <signal.h>
-#include <sys/ioctl.h>
-#include <fcntl.h>
-
-#include <a.out.h>
-
-#include <sys/time.h>
-#include <sys/resource.h>
-#include <sys/uio.h>
-#define curpcb Xcurpcb /* XXX avoid leaking declaration from pcb.h */
-#include <sys/user.h>
-#undef curpcb
-#include <sys/file.h>
-#include "gdb_stat.h"
-#include <sys/ptrace.h>
-
-extern void print_387_control_word (); /* i387-tdep.h */
-extern void print_387_status_word ();
-
-#define fpstate save87
-#define U_FPSTATE(u) u.u_pcb.pcb_savefpu
-
-static void
-i387_to_double (from, to)
- char *from;
- char *to;
-{
- long *lp;
- /* push extended mode on 387 stack, then pop in double mode
- *
- * first, set exception masks so no error is generated -
- * number will be rounded to inf or 0, if necessary
- */
- asm ("pushl %eax"); /* grab a stack slot */
- asm ("fstcw (%esp)"); /* get 387 control word */
- asm ("movl (%esp),%eax"); /* save old value */
- asm ("orl $0x3f,%eax"); /* mask all exceptions */
- asm ("pushl %eax");
- asm ("fldcw (%esp)"); /* load new value into 387 */
-
- asm ("movl 8(%ebp),%eax");
- asm ("fldt (%eax)"); /* push extended number on 387 stack */
- asm ("fwait");
- asm ("movl 12(%ebp),%eax");
- asm ("fstpl (%eax)"); /* pop double */
- asm ("fwait");
-
- asm ("popl %eax"); /* flush modified control word */
- asm ("fnclex"); /* clear exceptions */
- asm ("fldcw (%esp)"); /* restore original control word */
- asm ("popl %eax"); /* flush saved copy */
-}
-
-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];
-};
-
-static void
-print_387_status (status, ep)
- unsigned short status;
- struct env387 *ep;
-{
- int i;
- int bothstatus;
- int top;
- int fpreg;
-
- bothstatus = ((status != 0) && (ep->status != 0));
- if (status != 0)
- {
- if (bothstatus)
- printf_unfiltered ("u: ");
- print_387_status_word ((unsigned int)status);
- }
-
- if (ep->status != 0)
- {
- if (bothstatus)
- printf_unfiltered ("e: ");
- print_387_status_word ((unsigned int)ep->status);
- }
-
- print_387_control_word ((unsigned int)ep->control);
- printf_unfiltered ("last instruction: ");
- 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));
-
- top = (ep->status >> 11) & 7;
-
- printf_unfiltered (" regno tag msb lsb value\n");
- for (fpreg = 7; fpreg >= 0; fpreg--)
- {
- int exp;
- int mantissa_or;
- int normal;
- char *sign;
- int st_regno;
- unsigned short *usregs;
- double val;
-
- /* The physical regno `fpreg' is only relevant as an index into the
- * tag word. Logical `%st' numbers are required for indexing ep->regs.
- */
- st_regno = (fpreg + 8 - top) & 7;
-
- printf_unfiltered ("%%st(%d) %s ", st_regno, fpreg == top ? "=>" : " ");
-
- 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 = 9; i >= 0; i--)
- printf_unfiltered ("%02x", ep->regs[st_regno][i]);
-
- printf_unfiltered (" ");
-
- /*
- * Handle weird cases better than floatformat_to_double () and
- * printf ().
- */
- usregs = (unsigned short *) ep->regs[st_regno];
- sign = usregs[4] & 0x8000 ? "-" : "";
- exp = usregs[4] & 0x7fff;
- normal = usregs[3] & 0x8000;
- mantissa_or = usregs[0] | usregs[1] | usregs[2] | (usregs[3] & 0x7fff);
- if (exp == 0)
- {
- if (normal)
- printf_unfiltered ("Pseudo Denormal (0 as a double)");
- else if (mantissa_or == 0)
- printf_unfiltered ("%s0", sign);
- else
- printf_unfiltered ("Denormal (0 as a double)");
- }
- else if (exp == 0x7fff)
- {
- if (!normal)
- printf_unfiltered ("Pseudo ");
- if (mantissa_or == 0)
- printf_unfiltered ("%sInf", sign);
- else
- printf_unfiltered ("%s NaN",
- usregs[3] & 0x4000 ? "Quiet" : "Signaling");
- if (!normal)
- printf_unfiltered (" (NaN)");
- }
- else if (!normal)
- printf_unfiltered ("Unnormal (NaN)");
- else
- {
-#if 0
- /* Use this we stop trapping on overflow. */
- floatformat_to_double(&floatformat_i387_ext,
- (char *) ep->regs[st_regno], &val);
-#else
- i387_to_double((char *) ep->regs[st_regno], (char *) &val);
-#endif
- printf_unfiltered ("%g", val);
- }
- printf_unfiltered ("\n");
- }
-}
-
-void
-i386_float_info ()
-{
- struct user u; /* just for address computations */
- int i;
- /* fpstate defined in <sys/user.h> */
- struct fpstate *fpstatep;
- char buf[sizeof (struct fpstate) + 2 * sizeof (int)];
- unsigned int uaddr;
- char fpvalid;
- unsigned int rounded_addr;
- unsigned int rounded_size;
- /*extern int corechan;*/
- int skip;
- extern int inferior_pid;
-
- uaddr = (char *)&U_FPSTATE(u) - (char *)&u;
- if (inferior_pid != 0 && core_bfd == NULL)
- {
- int pid = inferior_pid & ((1 << 17) - 1); /* XXX extract pid from tid */
- ptrace(PT_GETFPREGS, pid, &buf[0], sizeof(struct fpreg));
- fpstatep = (struct fpstate *)&buf[0];
- }
- else
- fpstatep = &pcb_savefpu;
-
- print_387_status (fpstatep->sv_ex_sw, (struct env387 *)fpstatep);
-}
-#endif /* FLOAT_INFO */
-
-int
-kernel_u_size ()
-{
- return (sizeof (struct user));
-}
-
-#ifdef SETUP_ARBITRARY_FRAME
-#include "frame.h"
-struct frame_info *
-setup_arbitrary_frame (argc, argv)
- int argc;
- CORE_ADDR *argv;
-{
- if (argc != 2)
- error ("i386 frame specifications require two arguments: sp and pc");
-
- return create_new_frame (argv[0], argv[1]);
-}
-#endif /* SETUP_ARBITRARY_FRAME */
-
-#ifdef HAVE_GREGSET_T
-void
-supply_gregset (gp)
- gregset_t *gp;
-{
- int regno = 0;
-
- /* These must be ordered the same as REGISTER_NAMES in
- config/i386/tm-i386.h. */
- supply_register (regno++, (char *)&gp->r_eax);
- supply_register (regno++, (char *)&gp->r_ecx);
- supply_register (regno++, (char *)&gp->r_edx);
- supply_register (regno++, (char *)&gp->r_ebx);
- supply_register (regno++, (char *)&gp->r_esp);
- supply_register (regno++, (char *)&gp->r_ebp);
- supply_register (regno++, (char *)&gp->r_esi);
- supply_register (regno++, (char *)&gp->r_edi);
- supply_register (regno++, (char *)&gp->r_eip);
- supply_register (regno++, (char *)&gp->r_eflags);
- supply_register (regno++, (char *)&gp->r_cs);
- supply_register (regno++, (char *)&gp->r_ss);
- supply_register (regno++, (char *)&gp->r_ds);
- supply_register (regno++, (char *)&gp->r_es);
- supply_register (regno++, (char *)&gp->r_fs);
- supply_register (regno++, (char *)&gp->r_gs);
-}
-#endif /* HAVE_GREGSET_T */
-
-#ifdef HAVE_FPREGSET_T
-void
-supply_fpregset (fp)
- fpregset_t *fp;
-{
- memcpy (&pcb_savefpu, fp, sizeof pcb_savefpu);
-}
-#endif /* HAVE_FPREGSET_T */
-
-/* Register that we are able to handle aout (trad-core) file formats. */
-
-static struct core_fns aout_core_fns =
-{
- bfd_target_unknown_flavour,
- fetch_core_registers,
- NULL
-};
-
-void
-_initialize_core_aout ()
-{
- add_core_fns (&aout_core_fns);
-}
-
-#ifdef PT_GETDBREGS
-
-/*
- * 0: no trace output
- * 1: trace watchpoint requests
- * 2: trace `watchpoint hit?' tests, too
- */
-#define WATCHPOINT_DEBUG 0
-
-#include "breakpoint.h"
-
-int
-can_watch(type, cnt, ot)
- int type, cnt, ot;
-{
- int rv;
- static int cnt_watch, cnt_awatch;
-
- switch (type)
- {
- case bp_hardware_watchpoint:
- cnt_watch = cnt;
- break;
-
- case bp_access_watchpoint:
- cnt_awatch = cnt;
- break;
-
- default:
- rv = 0;
- goto overandout;
- }
-
- rv = cnt_watch + cnt_awatch <= 4? 1: -1;
-
- overandout:
-#if WATCHPOINT_DEBUG
- printf_filtered("can_watch(%d, %d, %d) = %d (counts: w: %d, rw: %d)\n",
- type, cnt, ot, rv, cnt_watch, cnt_awatch);
-#endif
-
- return rv;
-}
-
-int
-stopped_by_watchpoint()
-{
- struct dbreg dbr;
- extern int inferior_pid;
-
- if (current_target.to_shortname == 0 ||
- ! (strcmp(current_target.to_shortname, "child") == 0 ||
- strcmp(current_target.to_shortname, "freebsd-uthreads") == 0))
- return 0;
-
- if (inferior_pid != 0 && core_bfd == NULL)
- {
- int pid = inferior_pid & ((1 << 17) - 1); /* XXX extract pid from tid */
-
- if (ptrace(PT_GETDBREGS, pid, (caddr_t)&dbr, 0) == -1)
- {
- perror("ptrace(PT_GETDBREGS) failed");
- return 0;
- }
-#if WATCHPOINT_DEBUG > 1
- printf_filtered("stopped_by_watchpoint(): DR6 = %#x\n", dbr.dr6);
-#endif
- /*
- * If a hardware watchpoint was hit, one of the lower 4 bits in
- * DR6 is set (the actual bit indicates which of DR0...DR3 triggered
- * the trap).
- */
- return dbr.dr6 & 0x0f;
- }
- else
- {
- warning("Can't set a watchpoint on a core file.");
- return 0;
- }
-}
-
-int
-insert_watchpoint(addr, len, type)
- int addr, len, type;
-{
- struct dbreg dbr;
- extern int inferior_pid;
-
- if (current_target.to_shortname == 0 ||
- ! (strcmp(current_target.to_shortname, "child") == 0 ||
- strcmp(current_target.to_shortname, "freebsd-uthreads") == 0))
- return 0;
-
- if (inferior_pid != 0 && core_bfd == NULL)
- {
- int pid = inferior_pid & ((1 << 17) - 1); /* XXX extract pid from tid */
- int i, mask;
- unsigned int sbits;
-
- if (ptrace(PT_GETDBREGS, pid, (caddr_t)&dbr, 0) == -1)
- {
- perror("ptrace(PT_GETDBREGS) failed");
- return 0;
- }
-
- for (i = 0, mask = 0x03; i < 4; i++, mask <<= 2)
- if ((dbr.dr7 & mask) == 0)
- break;
- if (i >= 4) {
- warning("no more hardware watchpoints available");
- return -1;
- }
-
- /* paranoia */
- if (len > 4)
- {
- warning("watchpoint length %d unsupported, using lenght = 4",
- len);
- len = 4;
- }
- else if (len == 3)
- {
- warning("weird watchpoint length 3, using 2");
- len = 2;
- }
- else if (len == 0)
- {
- warning("weird watchpoint length 0, using 1");
- len = 1;
- }
-
- switch (len)
- {
- case 1: sbits = 0; break;
- case 2: sbits = 4; break;
- case 4: sbits = 0x0c; break;
- }
-
- /*
- * The `type' value is 0 for `watch on write', 1 for `watch on
- * read', 2 for `watch on both'. The i386 debug register
- * breakpoint types are 0 for `execute' (not used in GDB), 1 for
- * `write', and 4 for `read/write'. Plain `read' trapping is
- * not supported on i386, value 3 is illegal.
- */
- switch (type)
- {
- default:
- warning("weird watchpoint type %d, using a write watchpoint");
- /* FALLTHROUGH */
- case 0:
- sbits |= 1;
- break;
-
- case 2:
- sbits |= 3;
- break;
- }
- sbits <<= 4 * i + 16;
- sbits |= 1 << 2 * i;
-
- dbr.dr7 |= sbits;
- *(&dbr.dr0 + i) = (unsigned int)addr;
-
-#if WATCHPOINT_DEBUG
- printf_filtered("insert_watchpoint(), inserting DR7 = %#x, DR%d = %#x\n",
- dbr.dr7, i, addr);
-#endif
- if (ptrace(PT_SETDBREGS, pid, (caddr_t)&dbr, 0) == -1)
- {
- perror("ptrace(PT_SETDBREGS) failed");
- return 0;
- }
- }
- else
- {
- warning("Can't set a watchpoint on a core file.");
- return 0;
- }
-}
-
-int
-remove_watchpoint(addr, len, type)
- int addr, len, type;
-{
- struct dbreg dbr;
- extern int inferior_pid;
-
- if (current_target.to_shortname == 0 ||
- ! (strcmp(current_target.to_shortname, "child") == 0 ||
- strcmp(current_target.to_shortname, "freebsd-uthreads") == 0))
- return 0;
-
- if (inferior_pid != 0 && core_bfd == NULL)
- {
- int pid = inferior_pid & ((1 << 17) - 1); /* XXX extract pid from tid */
- int i;
- unsigned int sbits, *dbregp;
-
- if (ptrace(PT_GETDBREGS, pid, (caddr_t)&dbr, 0) == -1)
- {
- perror("ptrace(PT_GETDBREGS) failed");
- return 0;
- }
-
- for (i = 0, dbregp = &dbr.dr0; i < 4; i++, dbregp++)
- if (*dbregp == (unsigned int)addr)
- break;
- if (i >= 4)
- {
- warning("watchpoint for address %#x not found", addr);
- return -1;
- }
-
- *dbregp = 0;
- sbits = 0xf << (4 * i + 16);
- sbits |= 3 << 2 * i;
- dbr.dr7 &= ~sbits;
-
-#if WATCHPOINT_DEBUG
- printf_filtered("remove_watchpoint(): removing watchpoint for %#x, DR7 = %#x\n",
- addr, dbr.dr7);
-#endif
- if (ptrace(PT_SETDBREGS, pid, (caddr_t)&dbr, 0) == -1)
- {
- perror("ptrace(PT_SETDBREGS) failed");
- return 0;
- }
- }
- else
- {
- warning("Can't set a watchpoint on a core file.");
- return 0;
- }
-}
-
-#endif /* PT_GETDBREGS */
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