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/* Target-dependent code for GNU/Linux on CSKY.
Copyright (C) 2012-2020 Free Software Foundation, Inc.
Contributed by C-SKY Microsystems and Mentor Graphics.
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 "defs.h"
#include "osabi.h"
#include "glibc-tdep.h"
#include "linux-tdep.h"
#include "gdbarch.h"
#include "solib-svr4.h"
#include "regset.h"
#include "trad-frame.h"
#include "tramp-frame.h"
#include "csky-tdep.h"
/* Functions, definitions, and data structures for C-Sky core file debug. */
/* General regset pc, r1, r0, psr, r2-r31 for CK810. */
#define SIZEOF_CSKY_GREGSET 34*4
/* Float regset fesr fsr fr0-fr31 for CK810. */
#define SIZEOF_CSKY_FREGSET 34*4
/* Offset mapping table from core_section to regcache of general
registers for ck810. */
static const int csky_gregset_offset[] =
{
72, 1, 0, 89, 2, /* pc, r1, r0, psr, r2. */
3, 4, 5, 6, 7, /* r3 ~ r32. */
8, 9, 10, 11, 12,
13, 14, 15, 16, 17,
18, 19, 20, 21, 22,
23, 24, 25, 26, 27,
28, 29, 30, 31
};
/* Offset mapping table from core_section to regcache of float
registers for ck810. */
static const int csky_fregset_offset[] =
{
122, 123, 40, 41, 42, /* fcr, fesr, fr0 ~ fr2. */
43, 44, 45, 46, 47, /* fr3 ~ fr15. */
48, 49, 50, 51, 52,
53, 54, 55
};
/* Implement the supply_regset hook for GP registers in core files. */
static void
csky_supply_gregset (const struct regset *regset,
struct regcache *regcache, int regnum,
const void *regs, size_t len)
{
int i, gregset_num;
const gdb_byte *gregs = (const gdb_byte *) regs ;
gdb_assert (len >= SIZEOF_CSKY_GREGSET);
gregset_num = ARRAY_SIZE (csky_gregset_offset);
for (i = 0; i < gregset_num; i++)
{
if ((regnum == csky_gregset_offset[i] || regnum == -1)
&& csky_gregset_offset[i] != -1)
regcache->raw_supply (csky_gregset_offset[i], gregs + 4 * i);
}
}
/* Implement the collect_regset hook for GP registers in core files. */
static void
csky_collect_gregset (const struct regset *regset,
const struct regcache *regcache,
int regnum, void *gregs_buf, size_t len)
{
int regno, gregset_num;
gdb_byte *gregs = (gdb_byte *) gregs_buf ;
gdb_assert (len >= SIZEOF_CSKY_GREGSET);
gregset_num = ARRAY_SIZE (csky_gregset_offset);
for (regno = 0; regno < gregset_num; regno++)
{
if ((regnum == csky_gregset_offset[regno] || regnum == -1)
&& csky_gregset_offset[regno] != -1)
regcache->raw_collect (regno,
gregs + 4 + csky_gregset_offset[regno]);
}
}
/* Implement the supply_regset hook for FP registers in core files. */
static void
csky_supply_fregset (const struct regset *regset,
struct regcache *regcache, int regnum,
const void *regs, size_t len)
{
int i;
int offset = 0;
struct gdbarch *gdbarch = regcache->arch ();
const gdb_byte *fregs = (const gdb_byte *) regs;
int fregset_num = ARRAY_SIZE (csky_fregset_offset);
gdb_assert (len >= SIZEOF_CSKY_FREGSET);
for (i = 0; i < fregset_num; i++)
{
if ((regnum == csky_fregset_offset[i] || regnum == -1)
&& csky_fregset_offset[i] != -1)
{
int num = csky_fregset_offset[i];
offset += register_size (gdbarch, num);
regcache->raw_supply (csky_fregset_offset[i], fregs + offset);
}
}
}
/* Implement the collect_regset hook for FP registers in core files. */
static void
csky_collect_fregset (const struct regset *regset,
const struct regcache *regcache,
int regnum, void *fregs_buf, size_t len)
{
int regno;
struct gdbarch *gdbarch = regcache->arch ();
gdb_byte *fregs = (gdb_byte *) fregs_buf ;
int fregset_num = ARRAY_SIZE (csky_fregset_offset);
int offset = 0;
gdb_assert (len >= SIZEOF_CSKY_FREGSET);
for (regno = 0; regno < fregset_num; regno++)
{
if ((regnum == csky_fregset_offset[regno] || regnum == -1)
&& csky_fregset_offset[regno] != -1)
{
offset += register_size (gdbarch, csky_fregset_offset[regno]);
regcache->raw_collect (regno, fregs + offset);
}
}
}
static const struct regset csky_regset_general =
{
NULL,
csky_supply_gregset,
csky_collect_gregset
};
static const struct regset csky_regset_float =
{
NULL,
csky_supply_fregset,
csky_collect_fregset
};
/* Iterate over core file register note sections. */
static void
csky_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
iterate_over_regset_sections_cb *cb,
void *cb_data,
const struct regcache *regcache)
{
cb (".reg", sizeof (csky_gregset_offset), sizeof (csky_gregset_offset),
&csky_regset_general, NULL, cb_data);
cb (".reg2", sizeof (csky_fregset_offset), sizeof (csky_fregset_offset),
&csky_regset_float, NULL, cb_data);
}
static void
csky_linux_rt_sigreturn_init (const struct tramp_frame *self,
struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
int i;
CORE_ADDR sp = get_frame_register_unsigned (this_frame, 14);
CORE_ADDR base = sp + CSKY_SIGINFO_OFFSET + CSKY_SIGINFO_SIZE
+ CSKY_UCONTEXT_SIGCONTEXT
+ CSKY_SIGCONTEXT_SC_USP
+ CSKY_SIGCONTEXT_SC_A0;
/* Set addrs of R0 ~ R13. */
for (i = 0; i < 14; i++)
trad_frame_set_reg_addr (this_cache, i, base + i * 4);
/* Set addrs of SP(R14) and R15. */
trad_frame_set_reg_addr (this_cache, 14, base - 4);
trad_frame_set_reg_addr (this_cache, 15, base + 4 * 14);
/* Set addrs of R16 ~ R31. */
for (i = 15; i < 31; i++)
trad_frame_set_reg_addr (this_cache, i, base + i * 4);
/* Set addrs of PSR and PC. */
trad_frame_set_reg_addr (this_cache, 89, base + 4 * 33);
trad_frame_set_reg_addr (this_cache, 72, base + 4 * 34);
trad_frame_set_id (this_cache, frame_id_build (sp, func));
}
static struct tramp_frame
csky_linux_rt_sigreturn_tramp_frame = {
SIGTRAMP_FRAME,
4,
{
{ CSKY_MOVI_R7_173, ULONGEST_MAX },
{ CSKY_TRAP_0, ULONGEST_MAX },
{ TRAMP_SENTINEL_INSN }
},
csky_linux_rt_sigreturn_init
};
/* Hook function for gdbarch_register_osabi. */
static void
csky_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
linux_init_abi (info, gdbarch);
/* Shared library handling. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
svr4_ilp32_fetch_link_map_offsets);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
/* Core file support. */
set_gdbarch_iterate_over_regset_sections (
gdbarch, csky_linux_iterate_over_regset_sections);
/* Append tramp frame unwinder for SIGNAL. */
tramp_frame_prepend_unwinder (gdbarch,
&csky_linux_rt_sigreturn_tramp_frame);
}
void
_initialize_csky_linux_tdep (void)
{
gdbarch_register_osabi (bfd_arch_csky, 0, GDB_OSABI_LINUX,
csky_linux_init_abi);
}
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