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/* GNU/Linux/x86 specific low level interface, for the in-process
agent library for GDB.
Copyright (C) 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 3 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, see <http://www.gnu.org/licenses/>. */
#include "server.h"
/* GDB register numbers. */
enum i386_gdb_regnum
{
I386_EAX_REGNUM, /* %eax */
I386_ECX_REGNUM, /* %ecx */
I386_EDX_REGNUM, /* %edx */
I386_EBX_REGNUM, /* %ebx */
I386_ESP_REGNUM, /* %esp */
I386_EBP_REGNUM, /* %ebp */
I386_ESI_REGNUM, /* %esi */
I386_EDI_REGNUM, /* %edi */
I386_EIP_REGNUM, /* %eip */
I386_EFLAGS_REGNUM, /* %eflags */
I386_CS_REGNUM, /* %cs */
I386_SS_REGNUM, /* %ss */
I386_DS_REGNUM, /* %ds */
I386_ES_REGNUM, /* %es */
I386_FS_REGNUM, /* %fs */
I386_GS_REGNUM, /* %gs */
I386_ST0_REGNUM /* %st(0) */
};
#define i386_num_regs 16
/* Defined in auto-generated file i386-linux.c. */
void init_registers_i386_linux (void);
#define FT_CR_EAX 15
#define FT_CR_ECX 14
#define FT_CR_EDX 13
#define FT_CR_EBX 12
#define FT_CR_UESP 11
#define FT_CR_EBP 10
#define FT_CR_ESI 9
#define FT_CR_EDI 8
#define FT_CR_EIP 7
#define FT_CR_EFL 6
#define FT_CR_DS 5
#define FT_CR_ES 4
#define FT_CR_FS 3
#define FT_CR_GS 2
#define FT_CR_SS 1
#define FT_CR_CS 0
/* Mapping between the general-purpose registers in jump tracepoint
format and GDB's register array layout. */
static const int i386_ft_collect_regmap[] =
{
FT_CR_EAX * 4, FT_CR_ECX * 4, FT_CR_EDX * 4, FT_CR_EBX * 4,
FT_CR_UESP * 4, FT_CR_EBP * 4, FT_CR_ESI * 4, FT_CR_EDI * 4,
FT_CR_EIP * 4, FT_CR_EFL * 4, FT_CR_CS * 4, FT_CR_SS * 4,
FT_CR_DS * 4, FT_CR_ES * 4, FT_CR_FS * 4, FT_CR_GS * 4
};
void
supply_fast_tracepoint_registers (struct regcache *regcache,
const unsigned char *buf)
{
int i;
for (i = 0; i < i386_num_regs; i++)
{
int regval;
if (i >= I386_CS_REGNUM && i <= I386_GS_REGNUM)
regval = *(short *) (((char *) buf) + i386_ft_collect_regmap[i]);
else
regval = *(int *) (((char *) buf) + i386_ft_collect_regmap[i]);
supply_register (regcache, i, ®val);
}
}
ULONGEST __attribute__ ((visibility("default"), used))
gdb_agent_get_raw_reg (unsigned char *raw_regs, int regnum)
{
/* This should maybe be allowed to return an error code, or perhaps
better, have the emit_reg detect this, and emit a constant zero,
or something. */
if (regnum > i386_num_regs)
return 0;
else if (regnum >= I386_CS_REGNUM && regnum <= I386_GS_REGNUM)
return *(short *) (raw_regs + i386_ft_collect_regmap[regnum]);
else
return *(int *) (raw_regs + i386_ft_collect_regmap[regnum]);
}
/* This is only needed because reg-i386-linux-lib.o references it. We
may use it proper at some point. */
const char *gdbserver_xmltarget;
void
initialize_low_tracepoint (void)
{
init_registers_i386_linux ();
}
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