-/* Native-dependent code for NetBSD/i386, for GDB.
- Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000
+/* Native-dependent code for NetBSD/i386.
+
+ Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
+#include "gdbcore.h"
+#include "regcache.h"
+#include "target.h"
+
+#include "i386-tdep.h"
+#include "i386bsd-nat.h"
+
+/* Support for debugging kernel virtual memory images. */
+
#include <sys/types.h>
-#include <sys/ptrace.h>
-#include <machine/reg.h>
#include <machine/frame.h>
-#include "inferior.h"
-#include "gdbcore.h" /* for registers_fetched() */
-
-#define RF(dst, src) \
- memcpy(®isters[REGISTER_BYTE(dst)], &src, sizeof(src))
-
-#define RS(src, dst) \
- memcpy(&dst, ®isters[REGISTER_BYTE(src)], sizeof(dst))
-
-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];
- };
+#include <machine/pcb.h>
-void
-fetch_inferior_registers (regno)
- int regno;
-{
- struct reg inferior_registers;
- struct env387 inferior_fpregisters;
-
- ptrace (PT_GETREGS, inferior_pid,
- (PTRACE_ARG3_TYPE) &inferior_registers, 0);
- ptrace (PT_GETFPREGS, inferior_pid,
- (PTRACE_ARG3_TYPE) &inferior_fpregisters, 0);
-
- RF ( 0, inferior_registers.r_eax);
- RF ( 1, inferior_registers.r_ecx);
- RF ( 2, inferior_registers.r_edx);
- RF ( 3, inferior_registers.r_ebx);
- RF ( 4, inferior_registers.r_esp);
- RF ( 5, inferior_registers.r_ebp);
- RF ( 6, inferior_registers.r_esi);
- RF ( 7, inferior_registers.r_edi);
- RF ( 8, inferior_registers.r_eip);
- RF ( 9, inferior_registers.r_eflags);
- RF (10, inferior_registers.r_cs);
- RF (11, inferior_registers.r_ss);
- RF (12, inferior_registers.r_ds);
- RF (13, inferior_registers.r_es);
- RF (14, inferior_registers.r_fs);
- RF (15, inferior_registers.r_gs);
-
- RF (FP0_REGNUM, inferior_fpregisters.regs[0]);
- RF (FP0_REGNUM + 1, inferior_fpregisters.regs[1]);
- RF (FP0_REGNUM + 2, inferior_fpregisters.regs[2]);
- RF (FP0_REGNUM + 3, inferior_fpregisters.regs[3]);
- RF (FP0_REGNUM + 4, inferior_fpregisters.regs[4]);
- RF (FP0_REGNUM + 5, inferior_fpregisters.regs[5]);
- RF (FP0_REGNUM + 6, inferior_fpregisters.regs[6]);
- RF (FP0_REGNUM + 7, inferior_fpregisters.regs[7]);
-
- RF (FCTRL_REGNUM, inferior_fpregisters.control);
- RF (FSTAT_REGNUM, inferior_fpregisters.status);
- RF (FTAG_REGNUM, inferior_fpregisters.tag);
- RF (FCS_REGNUM, inferior_fpregisters.code_seg);
- RF (FCOFF_REGNUM, inferior_fpregisters.eip);
- RF (FDS_REGNUM, inferior_fpregisters.operand_seg);
- RF (FDOFF_REGNUM, inferior_fpregisters.operand);
- RF (FOP_REGNUM, inferior_fpregisters.opcode);
-
- registers_fetched ();
-}
+#include "nbsd-nat.h"
+#include "bsd-kvm.h"
-void
-store_inferior_registers (regno)
- int regno;
+static int
+i386nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
{
- struct reg inferior_registers;
- struct env387 inferior_fpregisters;
-
- RS ( 0, inferior_registers.r_eax);
- RS ( 1, inferior_registers.r_ecx);
- RS ( 2, inferior_registers.r_edx);
- RS ( 3, inferior_registers.r_ebx);
- RS ( 4, inferior_registers.r_esp);
- RS ( 5, inferior_registers.r_ebp);
- RS ( 6, inferior_registers.r_esi);
- RS ( 7, inferior_registers.r_edi);
- RS ( 8, inferior_registers.r_eip);
- RS ( 9, inferior_registers.r_eflags);
- RS (10, inferior_registers.r_cs);
- RS (11, inferior_registers.r_ss);
- RS (12, inferior_registers.r_ds);
- RS (13, inferior_registers.r_es);
- RS (14, inferior_registers.r_fs);
- RS (15, inferior_registers.r_gs);
-
-
- RS (FP0_REGNUM, inferior_fpregisters.regs[0]);
- RS (FP0_REGNUM + 1, inferior_fpregisters.regs[1]);
- RS (FP0_REGNUM + 2, inferior_fpregisters.regs[2]);
- RS (FP0_REGNUM + 3, inferior_fpregisters.regs[3]);
- RS (FP0_REGNUM + 4, inferior_fpregisters.regs[4]);
- RS (FP0_REGNUM + 5, inferior_fpregisters.regs[5]);
- RS (FP0_REGNUM + 6, inferior_fpregisters.regs[6]);
- RS (FP0_REGNUM + 7, inferior_fpregisters.regs[7]);
-
- RS (FCTRL_REGNUM, inferior_fpregisters.control);
- RS (FSTAT_REGNUM, inferior_fpregisters.status);
- RS (FTAG_REGNUM, inferior_fpregisters.tag);
- RS (FCS_REGNUM, inferior_fpregisters.code_seg);
- RS (FCOFF_REGNUM, inferior_fpregisters.eip);
- RS (FDS_REGNUM, inferior_fpregisters.operand_seg);
- RS (FDOFF_REGNUM, inferior_fpregisters.operand);
- RS (FOP_REGNUM, inferior_fpregisters.opcode);
-
- ptrace (PT_SETREGS, inferior_pid,
- (PTRACE_ARG3_TYPE) &inferior_registers, 0);
- ptrace (PT_SETFPREGS, inferior_pid,
- (PTRACE_ARG3_TYPE) &inferior_fpregisters, 0);
+ struct switchframe sf;
+
+ /* The following is true for NetBSD 1.6.2:
+
+ The pcb contains %esp and %ebp at the point of the context switch
+ in cpu_switch(). At that point we have a stack frame as
+ described by `struct switchframe', which for NetBSD 1.6.2 has the
+ following layout:
+
+ interrupt level
+ %edi
+ %esi
+ %ebx
+ %eip
+
+ we reconstruct the register state as it would look when we just
+ returned from cpu_switch(). */
+
+ /* The stack pointer shouldn't be zero. */
+ if (pcb->pcb_esp == 0)
+ return 0;
+
+ read_memory (pcb->pcb_esp, (gdb_byte *)&sf, sizeof sf);
+ pcb->pcb_esp += sizeof (struct switchframe);
+ regcache_raw_supply (regcache, I386_EDI_REGNUM, &sf.sf_edi);
+ regcache_raw_supply (regcache, I386_ESI_REGNUM, &sf.sf_esi);
+ regcache_raw_supply (regcache, I386_EBP_REGNUM, &pcb->pcb_ebp);
+ regcache_raw_supply (regcache, I386_ESP_REGNUM, &pcb->pcb_esp);
+ regcache_raw_supply (regcache, I386_EBX_REGNUM, &sf.sf_ebx);
+ regcache_raw_supply (regcache, I386_EIP_REGNUM, &sf.sf_eip);
+
+ return 1;
}
+\f
-struct md_core
-{
- struct reg intreg;
- struct fpreg freg;
-};
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_i386nbsd_nat (void);
void
-fetch_core_registers (core_reg_sect, core_reg_size, which, ignore)
- char *core_reg_sect;
- unsigned core_reg_size;
- int which;
- CORE_ADDR ignore;
+_initialize_i386nbsd_nat (void)
{
- struct md_core *core_reg = (struct md_core *) core_reg_sect;
-
- /* integer registers */
- memcpy (®isters[REGISTER_BYTE (0)], &core_reg->intreg,
- sizeof (struct reg));
- /* floating point registers */
- /* XXX */
+ struct target_ops *t;
+
+ /* Add some extra features to the common *BSD/i386 target. */
+ t = i386bsd_target ();
+ t->to_pid_to_exec_file = nbsd_pid_to_exec_file;
+ add_target (t);
+
+ /* Support debugging kernel virtual memory images. */
+ bsd_kvm_add_target (i386nbsd_supply_pcb);
}
projects / deliverable / binutils-gdb.git / blobdiff