58dbd54186
* Makefile.in (clean): Remove tic6x-*.c files. (linux-tic6x-low.o, tic6x-c62x-linux.o, tic6x-c64x-linux.o): New rules. (tic6x-c64xp-linux.o, tic6x-c62x-linux.c, tic6x-c64x-linux.c): Likewise. (tic6x-c64xp-linux.c): Likewise. * configure.srv: Add support for tic6x-*-uclinux. * linux-tic6x-low.c: New. * linux-low.c (PT_TEXT_ADDR, PT_DATA_ADDR, PT_TEXT_END_ADDR): Define.
335 lines
8.0 KiB
C
335 lines
8.0 KiB
C
/* Target dependent code for GDB on TI C6x systems.
|
|
|
|
Copyright (C) 2010, 2011
|
|
Free Software Foundation, Inc.
|
|
Contributed by Andrew Jenner <andrew@codesourcery.com>
|
|
Contributed by Yao Qi <yao@codesourcery.com>
|
|
|
|
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"
|
|
#include "linux-low.h"
|
|
|
|
#include <sys/ptrace.h>
|
|
#include <endian.h>
|
|
|
|
#include "gdb_proc_service.h"
|
|
|
|
#ifndef PTRACE_GET_THREAD_AREA
|
|
#define PTRACE_GET_THREAD_AREA 25
|
|
#endif
|
|
|
|
/* There are at most 69 registers accessible in ptrace. */
|
|
#define TIC6X_NUM_REGS 69
|
|
|
|
#include <asm/ptrace.h>
|
|
|
|
/* Defined in auto-generated file tic6x-c64xp-linux.c. */
|
|
void init_registers_tic6x_c64xp_linux (void);
|
|
/* Defined in auto-generated file tic6x-c64x-linux.c. */
|
|
void init_registers_tic6x_c64x_linux (void);
|
|
/* Defined in auto-generated file tic62x-c6xp-linux.c. */
|
|
void init_registers_tic6x_c62x_linux (void);
|
|
|
|
union tic6x_register
|
|
{
|
|
unsigned char buf[4];
|
|
|
|
int reg32;
|
|
};
|
|
|
|
/* Return the ptrace ``address'' of register REGNO. */
|
|
|
|
#if __BYTE_ORDER == __BIG_ENDIAN
|
|
static int tic6x_regmap_c64xp[] = {
|
|
/* A0 - A15 */
|
|
53, 52, 55, 54, 57, 56, 59, 58,
|
|
61, 60, 63, 62, 65, 64, 67, 66,
|
|
/* B0 - B15 */
|
|
23, 22, 25, 24, 27, 26, 29, 28,
|
|
31, 30, 33, 32, 35, 34, 69, 68,
|
|
/* CSR PC */
|
|
5, 4,
|
|
/* A16 - A31 */
|
|
37, 36, 39, 38, 41, 40, 43, 42,
|
|
45, 44, 47, 46, 49, 48, 51, 50,
|
|
/* B16 - B31 */
|
|
7, 6, 9, 8, 11, 10, 13, 12,
|
|
15, 14, 17, 16, 19, 18, 21, 20,
|
|
/* TSR, ILC, RILC */
|
|
1, 2, 3
|
|
};
|
|
|
|
static int tic6x_regmap_c64x[] = {
|
|
/* A0 - A15 */
|
|
51, 50, 53, 52, 55, 54, 57, 56,
|
|
59, 58, 61, 60, 63, 62, 65, 64,
|
|
/* B0 - B15 */
|
|
21, 20, 23, 22, 25, 24, 27, 26,
|
|
29, 28, 31, 30, 33, 32, 67, 66,
|
|
/* CSR PC */
|
|
3, 2,
|
|
/* A16 - A31 */
|
|
35, 34, 37, 36, 39, 38, 41, 40,
|
|
43, 42, 45, 44, 47, 46, 49, 48,
|
|
/* B16 - B31 */
|
|
5, 4, 7, 6, 9, 8, 11, 10,
|
|
13, 12, 15, 14, 17, 16, 19, 18,
|
|
-1, -1, -1
|
|
};
|
|
|
|
static int tic6x_regmap_c62x[] = {
|
|
/* A0 - A15 */
|
|
19, 18, 21, 20, 23, 22, 25, 24,
|
|
27, 26, 29, 28, 31, 30, 33, 32,
|
|
/* B0 - B15 */
|
|
5, 4, 7, 6, 9, 8, 11, 10,
|
|
13, 12, 15, 14, 17, 16, 35, 34,
|
|
/* CSR, PC */
|
|
3, 2,
|
|
-1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1
|
|
};
|
|
|
|
#else
|
|
static int tic6x_regmap_c64xp[] = {
|
|
/* A0 - A15 */
|
|
52, 53, 54, 55, 56, 57, 58, 59,
|
|
60, 61, 62, 63, 64, 65, 66, 67,
|
|
/* B0 - B15 */
|
|
22, 23, 24, 25, 26, 27, 28, 29,
|
|
30, 31, 32, 33, 34, 35, 68, 69,
|
|
/* CSR PC */
|
|
4, 5,
|
|
/* A16 - A31 */
|
|
36, 37, 38, 39, 40, 41, 42, 43,
|
|
44, 45, 46, 47, 48, 49, 50, 51,
|
|
/* B16 -B31 */
|
|
6, 7, 8, 9, 10, 11, 12, 13,
|
|
14, 15, 16, 17, 18, 19, 20, 31,
|
|
/* TSR, ILC, RILC */
|
|
0, 3, 2
|
|
};
|
|
|
|
static int tic6x_regmap_c64x[] = {
|
|
/* A0 - A15 */
|
|
50, 51, 52, 53, 54, 55, 56, 57,
|
|
58, 59, 60, 61, 62, 63, 64, 65,
|
|
/* B0 - B15 */
|
|
20, 21, 22, 23, 24, 25, 26, 27,
|
|
28, 29, 30, 31, 32, 33, 66, 67,
|
|
/* CSR PC */
|
|
2, 3,
|
|
/* A16 - A31 */
|
|
34, 35, 36, 37, 38, 39, 40, 41,
|
|
42, 43, 44, 45, 46, 47, 48, 49,
|
|
/* B16 - B31 */
|
|
4, 5, 6, 7, 8, 9, 10, 11,
|
|
12, 13, 14, 15, 16, 17, 18, 19,
|
|
-1, -1, -1
|
|
};
|
|
|
|
static int tic6x_regmap_c62x[] = {
|
|
/* A0 - A15 */
|
|
18, 19, 20, 21, 22, 23, 24, 25,
|
|
26, 27, 28, 29, 30, 31, 32, 33,
|
|
/* B0 - B15 */
|
|
4, 5, 6, 7, 8, 9, 10, 11,
|
|
12, 13, 14, 15, 16, 17, 34, 35,
|
|
/* CSR PC */
|
|
2, 3,
|
|
-1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1
|
|
};
|
|
|
|
#endif
|
|
|
|
extern struct linux_target_ops the_low_target;
|
|
|
|
static int *tic6x_regmap;
|
|
static unsigned int tic6x_breakpoint;
|
|
|
|
static void
|
|
tic6x_arch_setup (void)
|
|
{
|
|
register unsigned int csr asm ("B2");
|
|
unsigned int cpuid;
|
|
|
|
/* Determine the CPU we're running on to find the register order. */
|
|
__asm__ ("MVC .S2 CSR,%0" : "=r" (csr) :);
|
|
cpuid = csr >> 24;
|
|
switch (cpuid)
|
|
{
|
|
case 0x00: /* C62x */
|
|
case 0x02: /* C67x */
|
|
tic6x_regmap = tic6x_regmap_c62x;
|
|
tic6x_breakpoint = 0x0000a122; /* BNOP .S2 0,5 */
|
|
init_registers_tic6x_c62x_linux ();
|
|
break;
|
|
case 0x03: /* C67x+ */
|
|
tic6x_regmap = tic6x_regmap_c64x;
|
|
tic6x_breakpoint = 0x0000a122; /* BNOP .S2 0,5 */
|
|
init_registers_tic6x_c64x_linux ();
|
|
break;
|
|
case 0x0c: /* C64x */
|
|
tic6x_regmap = tic6x_regmap_c64x;
|
|
tic6x_breakpoint = 0x0000a122; /* BNOP .S2 0,5 */
|
|
init_registers_tic6x_c64x_linux ();
|
|
break;
|
|
case 0x10: /* C64x+ */
|
|
case 0x14: /* C674x */
|
|
case 0x15: /* C66x */
|
|
tic6x_regmap = tic6x_regmap_c64xp;
|
|
tic6x_breakpoint = 0x56454314; /* illegal opcode */
|
|
init_registers_tic6x_c64xp_linux ();
|
|
break;
|
|
default:
|
|
error ("Unknown CPU ID 0x%02x", cpuid);
|
|
}
|
|
the_low_target.regmap = tic6x_regmap;
|
|
}
|
|
|
|
static int
|
|
tic6x_cannot_fetch_register (int regno)
|
|
{
|
|
return (tic6x_regmap[regno] == -1);
|
|
}
|
|
|
|
static int
|
|
tic6x_cannot_store_register (int regno)
|
|
{
|
|
return (tic6x_regmap[regno] == -1);
|
|
}
|
|
|
|
static CORE_ADDR
|
|
tic6x_get_pc (struct regcache *regcache)
|
|
{
|
|
union tic6x_register pc;
|
|
|
|
collect_register_by_name (regcache, "PC", pc.buf);
|
|
return pc.reg32;
|
|
}
|
|
|
|
static void
|
|
tic6x_set_pc (struct regcache *regcache, CORE_ADDR pc)
|
|
{
|
|
union tic6x_register newpc;
|
|
|
|
newpc.reg32 = pc;
|
|
supply_register_by_name (regcache, "PC", newpc.buf);
|
|
}
|
|
|
|
#define tic6x_breakpoint_len 4
|
|
|
|
static int
|
|
tic6x_breakpoint_at (CORE_ADDR where)
|
|
{
|
|
unsigned int insn;
|
|
|
|
(*the_target->read_memory) (where, (unsigned char *) &insn, 4);
|
|
if (insn == tic6x_breakpoint)
|
|
return 1;
|
|
|
|
/* If necessary, recognize more trap instructions here. GDB only uses the
|
|
one. */
|
|
return 0;
|
|
}
|
|
|
|
/* Fetch the thread-local storage pointer for libthread_db. */
|
|
|
|
ps_err_e
|
|
ps_get_thread_area (const struct ps_prochandle *ph,
|
|
lwpid_t lwpid, int idx, void **base)
|
|
{
|
|
if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
|
|
return PS_ERR;
|
|
|
|
/* IDX is the bias from the thread pointer to the beginning of the
|
|
thread descriptor. It has to be subtracted due to implementation
|
|
quirks in libthread_db. */
|
|
*base = (void *) ((char *) *base - idx);
|
|
|
|
return PS_OK;
|
|
}
|
|
|
|
static void
|
|
tic6x_collect_register (struct regcache *regcache, int regno,
|
|
union tic6x_register *reg)
|
|
{
|
|
union tic6x_register tmp_reg;
|
|
|
|
collect_register (regcache, regno, &tmp_reg.reg32);
|
|
reg->reg32 = tmp_reg.reg32;
|
|
}
|
|
|
|
static void
|
|
tic6x_supply_register (struct regcache *regcache, int regno,
|
|
const union tic6x_register *reg)
|
|
{
|
|
int offset = 0;
|
|
|
|
supply_register (regcache, regno, reg->buf + offset);
|
|
}
|
|
|
|
static void
|
|
tic6x_fill_gregset (struct regcache *regcache, void *buf)
|
|
{
|
|
union tic6x_register *regset = buf;
|
|
int i;
|
|
|
|
for (i = 0; i < TIC6X_NUM_REGS; i++)
|
|
if (tic6x_regmap[i] != -1)
|
|
tic6x_collect_register (regcache, i, regset + tic6x_regmap[i]);
|
|
}
|
|
|
|
static void
|
|
tic6x_store_gregset (struct regcache *regcache, const void *buf)
|
|
{
|
|
const union tic6x_register *regset = buf;
|
|
int i;
|
|
|
|
for (i = 0; i < TIC6X_NUM_REGS; i++)
|
|
if (tic6x_regmap[i] != -1)
|
|
tic6x_supply_register (regcache, i, regset + tic6x_regmap[i]);
|
|
}
|
|
|
|
struct regset_info target_regsets[] = {
|
|
{ PTRACE_GETREGS, PTRACE_SETREGS, 0, TIC6X_NUM_REGS * 4, GENERAL_REGS,
|
|
tic6x_fill_gregset, tic6x_store_gregset },
|
|
{ 0, 0, 0, -1, -1, NULL, NULL }
|
|
};
|
|
|
|
struct linux_target_ops the_low_target = {
|
|
tic6x_arch_setup,
|
|
TIC6X_NUM_REGS,
|
|
0,
|
|
tic6x_cannot_fetch_register,
|
|
tic6x_cannot_store_register,
|
|
tic6x_get_pc,
|
|
tic6x_set_pc,
|
|
(const unsigned char *) &tic6x_breakpoint,
|
|
tic6x_breakpoint_len,
|
|
NULL,
|
|
0,
|
|
tic6x_breakpoint_at,
|
|
};
|