/* Target-dependent code for GNU/Linux on Tilera TILE-Gx processors. Copyright (C) 2012-2013 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 . */ #include "defs.h" #include "osabi.h" #include "linux-tdep.h" #include "glibc-tdep.h" #include "solib-svr4.h" #include "symtab.h" #include "regcache.h" #include "regset.h" #include "tramp-frame.h" #include "trad-frame.h" #include "tilegx-tdep.h" /* Signal trampoline support. */ static void tilegx_linux_sigframe_init (const struct tramp_frame *self, struct frame_info *this_frame, struct trad_frame_cache *this_cache, CORE_ADDR func) { CORE_ADDR pc = get_frame_register_unsigned (this_frame, 64); CORE_ADDR sp = get_frame_register_unsigned (this_frame, 54); /* Base address of register save area. */ CORE_ADDR base = sp + 16 /* Skip ABI_SAVE_AREA. */ + 128 /* Skip SIGINFO. */ + 40; /* Skip UCONTEXT. */ /* Address of saved LR register (R56) which holds previous PC. */ CORE_ADDR prev_pc = base + 56 * 8; int i; for (i = 0; i < 56; i++) trad_frame_set_reg_addr (this_cache, i, base + i * 8); trad_frame_set_reg_value (this_cache, 64, get_frame_memory_unsigned (this_frame, prev_pc, 8)); /* Save a frame ID. */ trad_frame_set_id (this_cache, frame_id_build (base, func)); } static const struct tramp_frame tilegx_linux_rt_sigframe = { SIGTRAMP_FRAME, 8, { { 0x00045fe551483000ULL, -1 }, /* { moveli r10, 139 } */ { 0x286b180051485000ULL, -1 }, /* { swint1 } */ { TRAMP_SENTINEL_INSN, -1 } }, tilegx_linux_sigframe_init }; /* Supply raw registers from REGCACHE to REGS. */ static void tilegx_linux_supply_regset (const struct regset *regset, struct regcache *regcache, int regnum, const void *regs, size_t len) { struct gdbarch *arch = get_regcache_arch (regcache); const char *ptr = regs; int i; /* This logic must match that of struct pt_regs in "ptrace.h". */ for (i = 0; i < TILEGX_NUM_EASY_REGS + 1; i++, ptr += tilegx_reg_size) { int gri = (i < TILEGX_NUM_EASY_REGS) ? i : TILEGX_PC_REGNUM; if (regnum == gri || regnum == -1) regcache_raw_supply (regcache, gri, ptr); } } /* TILE-Gx Linux kernel register set. */ static struct regset tilegx_linux_regset = { NULL, tilegx_linux_supply_regset }; static const struct regset * tilegx_regset_from_core_section (struct gdbarch *gdbarch, const char *sect_name, size_t sect_size) { if (strcmp (sect_name, ".reg") == 0) return &tilegx_linux_regset; return NULL; } /* OS specific initialization of gdbarch. */ static void tilegx_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { int arch_size = gdbarch_addr_bit (gdbarch); linux_init_abi (info, gdbarch); tramp_frame_prepend_unwinder (gdbarch, &tilegx_linux_rt_sigframe); set_gdbarch_regset_from_core_section (gdbarch, tilegx_regset_from_core_section); /* GNU/Linux uses SVR4-style shared libraries. */ if (arch_size == 32) set_solib_svr4_fetch_link_map_offsets (gdbarch, svr4_ilp32_fetch_link_map_offsets); else 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); /* Shared library handling. */ set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver); set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type); } /* Provide a prototype to silence -Wmissing-prototypes. */ extern initialize_file_ftype _initialize_tilegx_linux_tdep; void _initialize_tilegx_linux_tdep (void) { gdbarch_register_osabi (bfd_arch_tilegx, bfd_mach_tilegx, GDB_OSABI_LINUX, tilegx_linux_init_abi); }