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/* Target-dependent code for GNU/Linux UltraSPARC.
Copyright 2003, 2004, 2005 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 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 "tramp-frame.h"
#include "gdbarch.h"
#include "osabi.h"
#include "solib-svr4.h"
#include "symtab.h"
#include "trad-frame.h"
#include "sparc64-tdep.h"
/* The instruction sequence for RT signals is
mov __NR_rt_sigreturn, %g1 ! hex: 0x82102065
ta 0x6d ! hex: 0x91d0206d
The effect is to call the system call rt_sigreturn.
Note that 64-bit binaries only use this RT signal return method. */
#define LINUX64_RT_SIGTRAMP_INSN0 0x82102065
#define LINUX64_RT_SIGTRAMP_INSN1 0x91d0206d
static void sparc64_linux_sigframe_init (const struct tramp_frame *self,
struct frame_info *next_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func);
static const struct tramp_frame sparc64_linux_rt_sigframe = {
SIGTRAMP_FRAME,
4,
{
{ LINUX64_RT_SIGTRAMP_INSN0, -1 },
{ LINUX64_RT_SIGTRAMP_INSN1, -1 },
{ TRAMP_SENTINEL_INSN, -1 }
},
sparc64_linux_sigframe_init
};
static void
sparc64_linux_sigframe_init (const struct tramp_frame *self,
struct frame_info *next_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
CORE_ADDR base, addr;
int regnum;
base = frame_unwind_register_unsigned (next_frame, SPARC_O1_REGNUM);
base += 128;
/* Offsets from <bits/sigcontext.h> */
/* Since %g0 is always zero, keep the identity encoding. */
addr = base + 0x08;
for (regnum = SPARC_G1_REGNUM; regnum <= SPARC_O7_REGNUM; regnum++)
{
trad_frame_set_reg_addr (this_cache, regnum, addr);
addr += 8;
}
trad_frame_set_reg_addr (this_cache, SPARC64_STATE_REGNUM, addr + 0x00);
trad_frame_set_reg_addr (this_cache, SPARC64_PC_REGNUM, addr + 0x08);
trad_frame_set_reg_addr (this_cache, SPARC64_NPC_REGNUM, addr + 0x10);
trad_frame_set_reg_addr (this_cache, SPARC64_Y_REGNUM, addr + 0x18);
trad_frame_set_reg_addr (this_cache, SPARC64_FPRS_REGNUM, addr + 0x1c);
addr = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
if (addr & 1)
addr += BIAS;
base = addr;
for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
{
trad_frame_set_reg_addr (this_cache, regnum, addr);
addr += 8;
}
trad_frame_set_id (this_cache, frame_id_build (base, func));
}
static void
sparc64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
tramp_frame_prepend_unwinder (gdbarch, &sparc64_linux_rt_sigframe);
/* GNU/Linux has SVR4-style shared libraries... */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_lp64_fetch_link_map_offsets);
/* ...which means that we need some special handling when doing
prologue analysis. */
tdep->plt_entry_size = 16;
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
extern void _initialize_sparc64_linux_tdep (void);
void
_initialize_sparc64_linux_tdep (void)
{
gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
GDB_OSABI_LINUX, sparc64_linux_init_abi);
}
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