mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 08:13:37 +08:00
268 lines
8.8 KiB
C
268 lines
8.8 KiB
C
/* Target-dependent code for the IA-64 for GDB, the GNU debugger.
|
|
|
|
Copyright (C) 2000-2015 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 "defs.h"
|
|
#include "ia64-tdep.h"
|
|
#include "arch-utils.h"
|
|
#include "gdbcore.h"
|
|
#include "regcache.h"
|
|
#include "osabi.h"
|
|
#include "solib-svr4.h"
|
|
#include "symtab.h"
|
|
#include "linux-tdep.h"
|
|
#include "regset.h"
|
|
|
|
#include <ctype.h>
|
|
|
|
/* The sigtramp code is in a non-readable (executable-only) region
|
|
of memory called the ``gate page''. The addresses in question
|
|
were determined by examining the system headers. They are
|
|
overly generous to allow for different pages sizes. */
|
|
|
|
#define GATE_AREA_START 0xa000000000000100LL
|
|
#define GATE_AREA_END 0xa000000000020000LL
|
|
|
|
/* Offset to sigcontext structure from frame of handler. */
|
|
#define IA64_LINUX_SIGCONTEXT_OFFSET 192
|
|
|
|
static int
|
|
ia64_linux_pc_in_sigtramp (CORE_ADDR pc)
|
|
{
|
|
return (pc >= (CORE_ADDR) GATE_AREA_START && pc < (CORE_ADDR) GATE_AREA_END);
|
|
}
|
|
|
|
/* IA-64 GNU/Linux specific function which, given a frame address and
|
|
a register number, returns the address at which that register may be
|
|
found. 0 is returned for registers which aren't stored in the
|
|
sigcontext structure. */
|
|
|
|
static CORE_ADDR
|
|
ia64_linux_sigcontext_register_address (struct gdbarch *gdbarch,
|
|
CORE_ADDR sp, int regno)
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
gdb_byte buf[8];
|
|
CORE_ADDR sigcontext_addr = 0;
|
|
|
|
/* The address of the sigcontext area is found at offset 16 in the
|
|
sigframe. */
|
|
read_memory (sp + 16, buf, 8);
|
|
sigcontext_addr = extract_unsigned_integer (buf, 8, byte_order);
|
|
|
|
if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM)
|
|
return sigcontext_addr + 200 + 8 * (regno - IA64_GR0_REGNUM);
|
|
else if (IA64_BR0_REGNUM <= regno && regno <= IA64_BR7_REGNUM)
|
|
return sigcontext_addr + 136 + 8 * (regno - IA64_BR0_REGNUM);
|
|
else if (IA64_FR0_REGNUM <= regno && regno <= IA64_FR127_REGNUM)
|
|
return sigcontext_addr + 464 + 16 * (regno - IA64_FR0_REGNUM);
|
|
else
|
|
switch (regno)
|
|
{
|
|
case IA64_IP_REGNUM :
|
|
return sigcontext_addr + 40;
|
|
case IA64_CFM_REGNUM :
|
|
return sigcontext_addr + 48;
|
|
case IA64_PSR_REGNUM :
|
|
return sigcontext_addr + 56; /* user mask only */
|
|
/* sc_ar_rsc is provided, from which we could compute bspstore, but
|
|
I don't think it's worth it. Anyway, if we want it, it's at offset
|
|
64. */
|
|
case IA64_BSP_REGNUM :
|
|
return sigcontext_addr + 72;
|
|
case IA64_RNAT_REGNUM :
|
|
return sigcontext_addr + 80;
|
|
case IA64_CCV_REGNUM :
|
|
return sigcontext_addr + 88;
|
|
case IA64_UNAT_REGNUM :
|
|
return sigcontext_addr + 96;
|
|
case IA64_FPSR_REGNUM :
|
|
return sigcontext_addr + 104;
|
|
case IA64_PFS_REGNUM :
|
|
return sigcontext_addr + 112;
|
|
case IA64_LC_REGNUM :
|
|
return sigcontext_addr + 120;
|
|
case IA64_PR_REGNUM :
|
|
return sigcontext_addr + 128;
|
|
default :
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ia64_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
|
|
{
|
|
ia64_write_pc (regcache, pc);
|
|
|
|
/* We must be careful with modifying the instruction-pointer: if we
|
|
just interrupt a system call, the kernel would ordinarily try to
|
|
restart it when we resume the inferior, which typically results
|
|
in SIGSEGV or SIGILL. We prevent this by clearing r10, which
|
|
will tell the kernel that r8 does NOT contain a valid error code
|
|
and hence it will skip system-call restart.
|
|
|
|
The clearing of r10 is safe as long as ia64_write_pc() is only
|
|
called as part of setting up an inferior call. */
|
|
regcache_cooked_write_unsigned (regcache, IA64_GR10_REGNUM, 0);
|
|
}
|
|
|
|
/* Implementation of `gdbarch_stap_is_single_operand', as defined in
|
|
gdbarch.h. */
|
|
|
|
static int
|
|
ia64_linux_stap_is_single_operand (struct gdbarch *gdbarch, const char *s)
|
|
{
|
|
return ((isdigit (*s) && s[1] == '[' && s[2] == 'r') /* Displacement. */
|
|
|| *s == 'r' /* Register value. */
|
|
|| isdigit (*s)); /* Literal number. */
|
|
}
|
|
|
|
/* Core file support. */
|
|
|
|
static const struct regcache_map_entry ia64_linux_gregmap[] =
|
|
{
|
|
{ 32, IA64_GR0_REGNUM, 8 }, /* r0 ... r31 */
|
|
{ 1, REGCACHE_MAP_SKIP, 8 }, /* FIXME: NAT collection bits? */
|
|
{ 1, IA64_PR_REGNUM, 8 },
|
|
{ 8, IA64_BR0_REGNUM, 8 }, /* b0 ... b7 */
|
|
{ 1, IA64_IP_REGNUM, 8 },
|
|
{ 1, IA64_CFM_REGNUM, 8 },
|
|
{ 1, IA64_PSR_REGNUM, 8 },
|
|
{ 1, IA64_RSC_REGNUM, 8 },
|
|
{ 1, IA64_BSP_REGNUM, 8 },
|
|
{ 1, IA64_BSPSTORE_REGNUM, 8 },
|
|
{ 1, IA64_RNAT_REGNUM, 8 },
|
|
{ 1, IA64_CCV_REGNUM, 8 },
|
|
{ 1, IA64_UNAT_REGNUM, 8 },
|
|
{ 1, IA64_FPSR_REGNUM, 8 },
|
|
{ 1, IA64_PFS_REGNUM, 8 },
|
|
{ 1, IA64_LC_REGNUM, 8 },
|
|
{ 1, IA64_EC_REGNUM, 8 },
|
|
{ 0 }
|
|
};
|
|
|
|
/* Size of 'gregset_t', as defined by the Linux kernel. Note that
|
|
this is more than actually mapped in the regmap above. */
|
|
|
|
#define IA64_LINUX_GREGS_SIZE (128 * 8)
|
|
|
|
static const struct regcache_map_entry ia64_linux_fpregmap[] =
|
|
{
|
|
{ 128, IA64_FR0_REGNUM, 16 }, /* f0 ... f127 */
|
|
{ 0 }
|
|
};
|
|
|
|
#define IA64_LINUX_FPREGS_SIZE (128 * 16)
|
|
|
|
static void
|
|
ia64_linux_supply_fpregset (const struct regset *regset,
|
|
struct regcache *regcache,
|
|
int regnum, const void *regs, size_t len)
|
|
{
|
|
const gdb_byte f_zero[16] = { 0 };
|
|
const gdb_byte f_one[16] =
|
|
{ 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0xff, 0, 0, 0, 0, 0, 0 };
|
|
|
|
regcache_supply_regset (regset, regcache, regnum, regs, len);
|
|
|
|
/* Kernel generated cores have fr1==0 instead of 1.0. Older GDBs
|
|
did the same. So ignore whatever might be recorded in fpregset_t
|
|
for fr0/fr1 and always supply their expected values. */
|
|
if (regnum == -1 || regnum == IA64_FR0_REGNUM)
|
|
regcache_raw_supply (regcache, IA64_FR0_REGNUM, f_zero);
|
|
if (regnum == -1 || regnum == IA64_FR1_REGNUM)
|
|
regcache_raw_supply (regcache, IA64_FR1_REGNUM, f_one);
|
|
}
|
|
|
|
static const struct regset ia64_linux_gregset =
|
|
{
|
|
ia64_linux_gregmap,
|
|
regcache_supply_regset, regcache_collect_regset
|
|
};
|
|
|
|
static const struct regset ia64_linux_fpregset =
|
|
{
|
|
ia64_linux_fpregmap,
|
|
ia64_linux_supply_fpregset, regcache_collect_regset
|
|
};
|
|
|
|
static void
|
|
ia64_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
|
|
iterate_over_regset_sections_cb *cb,
|
|
void *cb_data,
|
|
const struct regcache *regcache)
|
|
{
|
|
cb (".reg", IA64_LINUX_GREGS_SIZE, &ia64_linux_gregset, NULL, cb_data);
|
|
cb (".reg2", IA64_LINUX_FPREGS_SIZE, &ia64_linux_fpregset, NULL, cb_data);
|
|
}
|
|
|
|
static void
|
|
ia64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
|
{
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
static const char *const stap_register_prefixes[] = { "r", NULL };
|
|
static const char *const stap_register_indirection_prefixes[] = { "[",
|
|
NULL };
|
|
static const char *const stap_register_indirection_suffixes[] = { "]",
|
|
NULL };
|
|
|
|
linux_init_abi (info, gdbarch);
|
|
|
|
/* Set the method of obtaining the sigcontext addresses at which
|
|
registers are saved. */
|
|
tdep->sigcontext_register_address = ia64_linux_sigcontext_register_address;
|
|
|
|
/* Set the pc_in_sigtramp method. */
|
|
tdep->pc_in_sigtramp = ia64_linux_pc_in_sigtramp;
|
|
|
|
set_gdbarch_write_pc (gdbarch, ia64_linux_write_pc);
|
|
|
|
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
|
|
|
|
set_solib_svr4_fetch_link_map_offsets
|
|
(gdbarch, svr4_lp64_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, ia64_linux_iterate_over_regset_sections);
|
|
|
|
/* SystemTap related. */
|
|
set_gdbarch_stap_register_prefixes (gdbarch, stap_register_prefixes);
|
|
set_gdbarch_stap_register_indirection_prefixes (gdbarch,
|
|
stap_register_indirection_prefixes);
|
|
set_gdbarch_stap_register_indirection_suffixes (gdbarch,
|
|
stap_register_indirection_suffixes);
|
|
set_gdbarch_stap_gdb_register_prefix (gdbarch, "r");
|
|
set_gdbarch_stap_is_single_operand (gdbarch,
|
|
ia64_linux_stap_is_single_operand);
|
|
}
|
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
|
extern initialize_file_ftype _initialize_ia64_linux_tdep;
|
|
|
|
void
|
|
_initialize_ia64_linux_tdep (void)
|
|
{
|
|
gdbarch_register_osabi (bfd_arch_ia64, 0, GDB_OSABI_LINUX,
|
|
ia64_linux_init_abi);
|
|
}
|