| 1 | /* Target-dependent code for GNU/Linux UltraSPARC. |
| 2 | |
| 3 | Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 20 | Boston, MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "frame.h" |
| 24 | #include "frame-unwind.h" |
| 25 | #include "gdbarch.h" |
| 26 | #include "osabi.h" |
| 27 | #include "solib-svr4.h" |
| 28 | #include "symtab.h" |
| 29 | #include "trad-frame.h" |
| 30 | #include "tramp-frame.h" |
| 31 | |
| 32 | #include "sparc64-tdep.h" |
| 33 | |
| 34 | /* Signal trampoline support. */ |
| 35 | |
| 36 | static void sparc64_linux_sigframe_init (const struct tramp_frame *self, |
| 37 | struct frame_info *next_frame, |
| 38 | struct trad_frame_cache *this_cache, |
| 39 | CORE_ADDR func); |
| 40 | |
| 41 | /* See sparc-linux-tdep.c for details. Note that 64-bit binaries only |
| 42 | use RT signals. */ |
| 43 | |
| 44 | static const struct tramp_frame sparc64_linux_rt_sigframe = |
| 45 | { |
| 46 | SIGTRAMP_FRAME, |
| 47 | 4, |
| 48 | { |
| 49 | { 0x82102065, -1 }, /* mov __NR_rt_sigreturn, %g1 */ |
| 50 | { 0x91d0206d, -1 }, /* ta 0x6d */ |
| 51 | { TRAMP_SENTINEL_INSN, -1 } |
| 52 | }, |
| 53 | sparc64_linux_sigframe_init |
| 54 | }; |
| 55 | |
| 56 | static void |
| 57 | sparc64_linux_sigframe_init (const struct tramp_frame *self, |
| 58 | struct frame_info *next_frame, |
| 59 | struct trad_frame_cache *this_cache, |
| 60 | CORE_ADDR func) |
| 61 | { |
| 62 | CORE_ADDR base, addr; |
| 63 | int regnum; |
| 64 | |
| 65 | base = frame_unwind_register_unsigned (next_frame, SPARC_O1_REGNUM); |
| 66 | base += 128; |
| 67 | |
| 68 | /* Offsets from <bits/sigcontext.h>. */ |
| 69 | |
| 70 | /* Since %g0 is always zero, keep the identity encoding. */ |
| 71 | addr = base + 8; |
| 72 | for (regnum = SPARC_G1_REGNUM; regnum <= SPARC_O7_REGNUM; regnum++) |
| 73 | { |
| 74 | trad_frame_set_reg_addr (this_cache, regnum, addr); |
| 75 | addr += 8; |
| 76 | } |
| 77 | |
| 78 | trad_frame_set_reg_addr (this_cache, SPARC64_STATE_REGNUM, addr + 0); |
| 79 | trad_frame_set_reg_addr (this_cache, SPARC64_PC_REGNUM, addr + 8); |
| 80 | trad_frame_set_reg_addr (this_cache, SPARC64_NPC_REGNUM, addr + 16); |
| 81 | trad_frame_set_reg_addr (this_cache, SPARC64_Y_REGNUM, addr + 24); |
| 82 | trad_frame_set_reg_addr (this_cache, SPARC64_FPRS_REGNUM, addr + 28); |
| 83 | |
| 84 | addr = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM); |
| 85 | if (addr & 1) |
| 86 | addr += BIAS; |
| 87 | |
| 88 | base = addr; |
| 89 | for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++) |
| 90 | { |
| 91 | trad_frame_set_reg_addr (this_cache, regnum, addr); |
| 92 | addr += 8; |
| 93 | } |
| 94 | trad_frame_set_id (this_cache, frame_id_build (base, func)); |
| 95 | } |
| 96 | \f |
| 97 | |
| 98 | static void |
| 99 | sparc64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 100 | { |
| 101 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 102 | |
| 103 | tramp_frame_prepend_unwinder (gdbarch, &sparc64_linux_rt_sigframe); |
| 104 | |
| 105 | sparc64_init_abi (info, gdbarch); |
| 106 | |
| 107 | /* GNU/Linux has SVR4-style shared libraries... */ |
| 108 | set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); |
| 109 | set_solib_svr4_fetch_link_map_offsets |
| 110 | (gdbarch, svr4_lp64_fetch_link_map_offsets); |
| 111 | |
| 112 | /* ...which means that we need some special handling when doing |
| 113 | prologue analysis. */ |
| 114 | tdep->plt_entry_size = 16; |
| 115 | |
| 116 | /* Enable TLS support. */ |
| 117 | set_gdbarch_fetch_tls_load_module_address (gdbarch, |
| 118 | svr4_fetch_objfile_link_map); |
| 119 | } |
| 120 | \f |
| 121 | |
| 122 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 123 | extern void _initialize_sparc64_linux_tdep (void); |
| 124 | |
| 125 | void |
| 126 | _initialize_sparc64_linux_tdep (void) |
| 127 | { |
| 128 | gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, |
| 129 | GDB_OSABI_LINUX, sparc64_linux_init_abi); |
| 130 | } |