| /* Target-dependent code for OpenBSD/arm. |
| |
| Copyright (C) 2006 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., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #include "defs.h" |
| #include "osabi.h" |
| #include "trad-frame.h" |
| #include "tramp-frame.h" |
| |
| #include "obsd-tdep.h" |
| #include "arm-tdep.h" |
| #include "solib-svr4.h" |
| |
| /* Signal trampolines. */ |
| |
| static void |
| armobsd_sigframe_init (const struct tramp_frame *self, |
| struct frame_info *next_frame, |
| struct trad_frame_cache *cache, |
| CORE_ADDR func) |
| { |
| CORE_ADDR sp, sigcontext_addr, addr; |
| int regnum; |
| |
| /* We find the appropriate instance of `struct sigcontext' at a |
| fixed offset in the signal frame. */ |
| sp = frame_unwind_register_signed (next_frame, ARM_SP_REGNUM); |
| sigcontext_addr = sp + 16; |
| |
| /* PC. */ |
| trad_frame_set_reg_addr (cache, ARM_PC_REGNUM, sigcontext_addr + 76); |
| |
| /* GPRs. */ |
| for (regnum = ARM_A1_REGNUM, addr = sigcontext_addr + 12; |
| regnum <= ARM_LR_REGNUM; regnum++, addr += 4) |
| trad_frame_set_reg_addr (cache, regnum, addr); |
| |
| trad_frame_set_id (cache, frame_id_build (sp, func)); |
| } |
| |
| static const struct tramp_frame armobsd_sigframe = |
| { |
| SIGTRAMP_FRAME, |
| 4, |
| { |
| { 0xe28d0010, -1 }, /* add r0, sp, #16 */ |
| { 0xef000067, -1 }, /* swi SYS_sigreturn */ |
| { 0xef000001, -1 }, /* swi SYS_exit */ |
| { 0xeafffffc, -1 }, /* b . - 8 */ |
| { TRAMP_SENTINEL_INSN, -1 } |
| }, |
| armobsd_sigframe_init |
| }; |
| |
| |
| static void |
| armobsd_init_abi (struct gdbarch_info info, |
| struct gdbarch *gdbarch) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| |
| if (tdep->fp_model == ARM_FLOAT_AUTO) |
| tdep->fp_model = ARM_FLOAT_SOFT_VFP; |
| |
| tramp_frame_prepend_unwinder (gdbarch, &armobsd_sigframe); |
| |
| /* OpenBSD/arm uses SVR4-style shared libraries. */ |
| set_solib_svr4_fetch_link_map_offsets |
| (gdbarch, svr4_ilp32_fetch_link_map_offsets); |
| set_gdbarch_skip_solib_resolver (gdbarch, obsd_skip_solib_resolver); |
| |
| tdep->jb_pc = 24; |
| tdep->jb_elt_size = 4; |
| } |
| |
| void |
| _initialize_armobsd_tdep (void) |
| { |
| gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_OPENBSD_ELF, |
| armobsd_init_abi); |
| } |