157 lines
4.5 KiB
C
157 lines
4.5 KiB
C
/* Target-dependent code for GNU/Linux on Tilera TILE-Gx processors.
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Copyright 2012 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "osabi.h"
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#include "linux-tdep.h"
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#include "glibc-tdep.h"
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#include "solib-svr4.h"
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#include "symtab.h"
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#include "regcache.h"
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#include "regset.h"
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#include "tramp-frame.h"
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#include "trad-frame.h"
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#include "tilegx-tdep.h"
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/* Signal trampoline support. */
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static void
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tilegx_linux_sigframe_init (const struct tramp_frame *self,
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struct frame_info *this_frame,
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struct trad_frame_cache *this_cache,
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CORE_ADDR func)
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{
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CORE_ADDR pc = get_frame_register_unsigned (this_frame, 64);
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CORE_ADDR sp = get_frame_register_unsigned (this_frame, 54);
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/* Base address of register save area. */
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CORE_ADDR base = sp
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+ 16 /* Skip ABI_SAVE_AREA. */
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+ 128 /* Skip SIGINFO. */
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+ 40; /* Skip UCONTEXT. */
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/* Address of saved LR register (R56) which holds previous PC. */
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CORE_ADDR prev_pc = base + 56 * 8;
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int i;
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for (i = 0; i < 56; i++)
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trad_frame_set_reg_addr (this_cache, i, base + i * 8);
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trad_frame_set_reg_value (this_cache, 64,
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get_frame_memory_unsigned (this_frame, prev_pc, 8));
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/* Save a frame ID. */
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trad_frame_set_id (this_cache, frame_id_build (base, func));
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}
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static const struct tramp_frame tilegx_linux_rt_sigframe =
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{
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SIGTRAMP_FRAME,
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8,
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{
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{ 0x00045fe551483000ULL, -1 }, /* { moveli r10, 139 } */
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{ 0x286b180051485000ULL, -1 }, /* { swint1 } */
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{ TRAMP_SENTINEL_INSN, -1 }
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},
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tilegx_linux_sigframe_init
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};
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/* Supply raw registers from REGCACHE to REGS. */
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static void
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tilegx_linux_supply_regset (const struct regset *regset,
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struct regcache *regcache,
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int regnum, const void *regs, size_t len)
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{
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struct gdbarch *arch = get_regcache_arch (regcache);
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const char *ptr = regs;
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int i;
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/* This logic must match that of struct pt_regs in "ptrace.h". */
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for (i = 0; i < TILEGX_NUM_EASY_REGS + 1; i++, ptr += tilegx_reg_size)
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{
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int gri = (i < TILEGX_NUM_EASY_REGS) ? i : TILEGX_PC_REGNUM;
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if (regnum == gri || regnum == -1)
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regcache_raw_supply (regcache, gri, ptr);
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}
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}
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/* TILE-Gx Linux kernel register set. */
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static struct regset tilegx_linux_regset =
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{
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NULL,
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tilegx_linux_supply_regset
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};
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static const struct regset *
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tilegx_regset_from_core_section (struct gdbarch *gdbarch,
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const char *sect_name,
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size_t sect_size)
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{
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if (strcmp (sect_name, ".reg") == 0)
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return &tilegx_linux_regset;
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return NULL;
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}
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/* OS specific initialization of gdbarch. */
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static void
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tilegx_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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int arch_size = gdbarch_addr_bit (gdbarch);
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linux_init_abi (info, gdbarch);
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tramp_frame_prepend_unwinder (gdbarch, &tilegx_linux_rt_sigframe);
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set_gdbarch_regset_from_core_section (gdbarch,
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tilegx_regset_from_core_section);
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/* GNU/Linux uses SVR4-style shared libraries. */
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if (arch_size == 32)
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set_solib_svr4_fetch_link_map_offsets (gdbarch,
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svr4_ilp32_fetch_link_map_offsets);
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else
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set_solib_svr4_fetch_link_map_offsets (gdbarch,
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svr4_lp64_fetch_link_map_offsets);
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/* Enable TLS support. */
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set_gdbarch_fetch_tls_load_module_address (gdbarch,
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svr4_fetch_objfile_link_map);
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/* Shared library handling. */
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set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
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set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
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set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type);
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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extern initialize_file_ftype _initialize_tilegx_linux_tdep;
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void
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_initialize_tilegx_linux_tdep (void)
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{
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gdbarch_register_osabi (bfd_arch_tilegx, bfd_mach_tilegx, GDB_OSABI_LINUX,
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tilegx_linux_init_abi);
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}
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