mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
2ca6286524
(sparc64nbsd_sizeof_struct_reg, sparc64nbsd_sizeof_struct_fpreg): Remove variables. (fetch_core_registers): Remove function. (sparc64nbsd_core_fns): Remove variable. (sparc64nbsd_supply_gregset, sparc64nbsd_supply_fpregset): New functions. (sparc64nbsd_init_abi): Initialize TDEP->gregset, TDEP->sizeof_gregset, TDEP->fpregset and TDEP->sizeof_gregset. (_initialize_sparc64nbsd_tdep): Remove call to add_core_fns.
247 lines
7.6 KiB
C
247 lines
7.6 KiB
C
/* Target-dependent code for NetBSD/sparc64.
|
||
|
||
Copyright 2002, 2003, 2004 Free Software Foundation, Inc.
|
||
Based on code contributed by Wasabi Systems, 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 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 "defs.h"
|
||
#include "frame.h"
|
||
#include "frame-unwind.h"
|
||
#include "gdbcore.h"
|
||
#include "osabi.h"
|
||
#include "regcache.h"
|
||
#include "regset.h"
|
||
#include "symtab.h"
|
||
#include "solib-svr4.h"
|
||
#include "trad-frame.h"
|
||
|
||
#include "gdb_assert.h"
|
||
#include "gdb_string.h"
|
||
|
||
#include "sparc64-tdep.h"
|
||
#include "nbsd-tdep.h"
|
||
|
||
/* From <machine/reg.h>. */
|
||
const struct sparc_gregset sparc64nbsd_gregset =
|
||
{
|
||
0 * 8, /* "tstate" */
|
||
1 * 8, /* %pc */
|
||
2 * 8, /* %npc */
|
||
3 * 8, /* %y */
|
||
-1, /* %fprs */
|
||
-1,
|
||
5 * 8, /* %g1 */
|
||
-1, /* %l0 */
|
||
4 /* sizeof (%y) */
|
||
};
|
||
|
||
|
||
static void
|
||
sparc64nbsd_supply_gregset (const struct regset *regset,
|
||
struct regcache *regcache,
|
||
int regnum, const void *gregs, size_t len)
|
||
{
|
||
sparc64_supply_gregset (regset->descr, regcache, regnum, gregs);
|
||
}
|
||
|
||
static void
|
||
sparc64nbsd_supply_fpregset (const struct regset *regset,
|
||
struct regcache *regcache,
|
||
int regnum, const void *fpregs, size_t len)
|
||
{
|
||
sparc64_supply_fpregset (regcache, regnum, fpregs);
|
||
}
|
||
|
||
|
||
/* Signal trampolines. */
|
||
|
||
/* The following variables describe the location of an on-stack signal
|
||
trampoline. The current values correspond to the memory layout for
|
||
NetBSD 1.3 and up. These shouldn't be necessary for NetBSD 2.0 and
|
||
up, since NetBSD uses signal trampolines provided by libc now. */
|
||
|
||
static const CORE_ADDR sparc64nbsd_sigtramp_start = 0xffffffffffffdee4ULL;
|
||
static const CORE_ADDR sparc64nbsd_sigtramp_end = 0xffffffffffffe000ULL;
|
||
|
||
static int
|
||
sparc64nbsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
|
||
{
|
||
if (pc >= sparc64nbsd_sigtramp_start && pc < sparc64nbsd_sigtramp_end)
|
||
return 1;
|
||
|
||
return nbsd_pc_in_sigtramp (pc, name);
|
||
}
|
||
|
||
static struct sparc_frame_cache *
|
||
sparc64nbsd_sigcontext_frame_cache (struct frame_info *next_frame,
|
||
void **this_cache)
|
||
{
|
||
struct sparc_frame_cache *cache;
|
||
CORE_ADDR addr, sigcontext_addr, sp;
|
||
LONGEST fprs;
|
||
int regnum, delta;
|
||
|
||
if (*this_cache)
|
||
return *this_cache;
|
||
|
||
cache = sparc_frame_cache (next_frame, this_cache);
|
||
gdb_assert (cache == *this_cache);
|
||
|
||
/* The registers are saved in bits and pieces scattered all over the
|
||
place. The code below records their location on the assumption
|
||
that the part of the signal trampoline that saves the state has
|
||
been executed. */
|
||
|
||
/* If we couldn't find the frame's function, we're probably dealing
|
||
with an on-stack signal trampoline. */
|
||
if (cache->pc == 0)
|
||
{
|
||
cache->pc = sparc64nbsd_sigtramp_start;
|
||
|
||
/* Since we couldn't find the frame's function, the cache was
|
||
initialized under the assumption that we're frameless. */
|
||
cache->frameless_p = 0;
|
||
addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM);
|
||
cache->base = addr;
|
||
}
|
||
|
||
cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
|
||
|
||
/* We find the appropriate instance of `struct sigcontext' at a
|
||
fixed offset in the signal frame. */
|
||
sigcontext_addr = cache->base + BIAS + 128 + 8;
|
||
|
||
cache->saved_regs[SPARC_SP_REGNUM].addr = sigcontext_addr + 8;
|
||
cache->saved_regs[SPARC64_PC_REGNUM].addr = sigcontext_addr + 16;
|
||
cache->saved_regs[SPARC64_NPC_REGNUM].addr = sigcontext_addr + 24;
|
||
cache->saved_regs[SPARC64_STATE_REGNUM].addr = sigcontext_addr + 32;
|
||
cache->saved_regs[SPARC_G1_REGNUM].addr = sigcontext_addr + 40;
|
||
cache->saved_regs[SPARC_O0_REGNUM].addr = sigcontext_addr + 48;
|
||
|
||
/* The remaining `global' registers and %y are saved in the `local'
|
||
registers. */
|
||
delta = SPARC_L0_REGNUM - SPARC_G0_REGNUM;
|
||
for (regnum = SPARC_G2_REGNUM; regnum <= SPARC_G7_REGNUM; regnum++)
|
||
cache->saved_regs[regnum].realreg = regnum + delta;
|
||
cache->saved_regs[SPARC64_Y_REGNUM].realreg = SPARC_L1_REGNUM;
|
||
|
||
/* The remaining `out' registers can be found in the current frame's
|
||
`in' registers. */
|
||
delta = SPARC_I0_REGNUM - SPARC_O0_REGNUM;
|
||
for (regnum = SPARC_O1_REGNUM; regnum <= SPARC_O5_REGNUM; regnum++)
|
||
cache->saved_regs[regnum].realreg = regnum + delta;
|
||
cache->saved_regs[SPARC_O7_REGNUM].realreg = SPARC_I7_REGNUM;
|
||
|
||
/* The `local' and `in' registers have been saved in the register
|
||
save area. */
|
||
addr = cache->saved_regs[SPARC_SP_REGNUM].addr;
|
||
sp = get_frame_memory_unsigned (next_frame, addr, 8);
|
||
for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
|
||
regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
|
||
cache->saved_regs[regnum].addr = addr;
|
||
|
||
/* TODO: Handle the floating-point registers. */
|
||
|
||
return cache;
|
||
}
|
||
|
||
static void
|
||
sparc64nbsd_sigcontext_frame_this_id (struct frame_info *next_frame,
|
||
void **this_cache,
|
||
struct frame_id *this_id)
|
||
{
|
||
struct sparc_frame_cache *cache =
|
||
sparc64nbsd_sigcontext_frame_cache (next_frame, this_cache);
|
||
|
||
(*this_id) = frame_id_build (cache->base, cache->pc);
|
||
}
|
||
|
||
static void
|
||
sparc64nbsd_sigcontext_frame_prev_register (struct frame_info *next_frame,
|
||
void **this_cache,
|
||
int regnum, int *optimizedp,
|
||
enum lval_type *lvalp,
|
||
CORE_ADDR *addrp,
|
||
int *realnump, void *valuep)
|
||
{
|
||
struct sparc_frame_cache *cache =
|
||
sparc64nbsd_sigcontext_frame_cache (next_frame, this_cache);
|
||
|
||
trad_frame_prev_register (next_frame, cache->saved_regs, regnum,
|
||
optimizedp, lvalp, addrp, realnump, valuep);
|
||
}
|
||
|
||
static const struct frame_unwind sparc64nbsd_sigcontext_frame_unwind =
|
||
{
|
||
SIGTRAMP_FRAME,
|
||
sparc64nbsd_sigcontext_frame_this_id,
|
||
sparc64nbsd_sigcontext_frame_prev_register
|
||
};
|
||
|
||
static const struct frame_unwind *
|
||
sparc64nbsd_sigtramp_frame_sniffer (struct frame_info *next_frame)
|
||
{
|
||
CORE_ADDR pc = frame_pc_unwind (next_frame);
|
||
char *name;
|
||
|
||
find_pc_partial_function (pc, &name, NULL, NULL);
|
||
if (sparc64nbsd_pc_in_sigtramp (pc, name))
|
||
{
|
||
if (name == NULL || strncmp (name, "__sigtramp_sigcontext", 21))
|
||
return &sparc64nbsd_sigcontext_frame_unwind;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
|
||
static void
|
||
sparc64nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
tdep->gregset = XMALLOC (struct regset);
|
||
tdep->gregset->descr = &sparc64nbsd_gregset;
|
||
tdep->gregset->supply_regset = sparc64nbsd_supply_gregset;
|
||
tdep->sizeof_gregset = 160;
|
||
|
||
tdep->fpregset = XMALLOC (struct regset);
|
||
tdep->fpregset->supply_regset = sparc64nbsd_supply_fpregset;
|
||
tdep->sizeof_fpregset = 272;
|
||
|
||
set_gdbarch_pc_in_sigtramp (gdbarch, sparc64nbsd_pc_in_sigtramp);
|
||
frame_unwind_append_sniffer (gdbarch, sparc64nbsd_sigtramp_frame_sniffer);
|
||
|
||
sparc64_init_abi (info, gdbarch);
|
||
|
||
set_solib_svr4_fetch_link_map_offsets
|
||
(gdbarch, nbsd_lp64_solib_svr4_fetch_link_map_offsets);
|
||
}
|
||
|
||
|
||
/* Provide a prototype to silence -Wmissing-prototypes. */
|
||
void _initialize_sparc64nbsd_tdep (void);
|
||
|
||
void
|
||
_initialize_sparc64nbsd_tdep (void)
|
||
{
|
||
gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
|
||
GDB_OSABI_NETBSD_ELF, sparc64nbsd_init_abi);
|
||
}
|