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/*
* x86-specific gdb stub routines
* based on x86 cdb(xen/arch/x86/cdb.c), but Extensively modified.
*
* Copyright (C) 2006 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan. K.K.
*
* 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
*/
#include <asm/debugger.h>
u16
gdb_arch_signal_num(struct cpu_user_regs *regs, unsigned long cookie)
{
return 5; /* TRAP signal. see include/gdb/signals.h */
}
/*
* Use __copy_*_user to make us page-fault safe, but not otherwise restrict
* our access to the full virtual address space.
*/
unsigned int
gdb_arch_copy_from_user(void *dest, const void *src, unsigned len)
{
return __copy_from_user(dest, src, len);
}
unsigned int
gdb_arch_copy_to_user(void *dest, const void *src, unsigned len)
{
return __copy_to_user(dest, src, len);
}
void
gdb_arch_print_state(struct cpu_user_regs *regs)
{
/* XXX */
}
void
gdb_arch_enter(struct cpu_user_regs *regs)
{
/* nothing */
}
void
gdb_arch_exit(struct cpu_user_regs *regs)
{
/* nothing */
}
void
gdb_arch_resume(struct cpu_user_regs *regs,
unsigned long addr, unsigned long type,
struct gdb_context *ctx)
{
if ( addr != -1UL )
regs->eip = addr;
regs->eflags &= ~X86_EFLAGS_TF;
/* Set eflags.RF to ensure we do not re-enter. */
regs->eflags |= X86_EFLAGS_RF;
/* Set the trap flag if we are single stepping. */
if ( type == GDB_STEP )
regs->eflags |= X86_EFLAGS_TF;
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* End:
*/
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