1 /* Target-dependent code for GNU/Linux UltraSPARC.
3 Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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. */
24 #include "frame-unwind.h"
27 #include "solib-svr4.h"
29 #include "trad-frame.h"
30 #include "tramp-frame.h"
32 #include "sparc64-tdep.h"
34 /* Signal trampoline support. */
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,
41 /* See sparc-linux-tdep.c for details. Note that 64-bit binaries only
44 static const struct tramp_frame sparc64_linux_rt_sigframe =
49 { 0x82102065, -1 }, /* mov __NR_rt_sigreturn, %g1 */
50 { 0x91d0206d, -1 }, /* ta 0x6d */
51 { TRAMP_SENTINEL_INSN, -1 }
53 sparc64_linux_sigframe_init
57 sparc64_linux_sigframe_init (const struct tramp_frame *self,
58 struct frame_info *next_frame,
59 struct trad_frame_cache *this_cache,
62 CORE_ADDR base, addr, sp_addr;
65 base = frame_unwind_register_unsigned (next_frame, SPARC_O1_REGNUM);
68 /* Offsets from <bits/sigcontext.h>. */
70 /* Since %g0 is always zero, keep the identity encoding. */
72 sp_addr = base + ((SPARC_SP_REGNUM - SPARC_G0_REGNUM) * 8);
73 for (regnum = SPARC_G1_REGNUM; regnum <= SPARC_O7_REGNUM; regnum++)
75 trad_frame_set_reg_addr (this_cache, regnum, addr);
79 trad_frame_set_reg_addr (this_cache, SPARC64_STATE_REGNUM, addr + 0);
80 trad_frame_set_reg_addr (this_cache, SPARC64_PC_REGNUM, addr + 8);
81 trad_frame_set_reg_addr (this_cache, SPARC64_NPC_REGNUM, addr + 16);
82 trad_frame_set_reg_addr (this_cache, SPARC64_Y_REGNUM, addr + 24);
83 trad_frame_set_reg_addr (this_cache, SPARC64_FPRS_REGNUM, addr + 28);
85 base = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
89 addr = get_frame_memory_unsigned (next_frame, sp_addr, 8);
93 for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
95 trad_frame_set_reg_addr (this_cache, regnum, addr);
98 trad_frame_set_id (this_cache, frame_id_build (base, func));
103 sparc64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
105 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
107 tramp_frame_prepend_unwinder (gdbarch, &sparc64_linux_rt_sigframe);
109 sparc64_init_abi (info, gdbarch);
111 /* GNU/Linux has SVR4-style shared libraries... */
112 set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
113 set_solib_svr4_fetch_link_map_offsets
114 (gdbarch, svr4_lp64_fetch_link_map_offsets);
116 /* ...which means that we need some special handling when doing
117 prologue analysis. */
118 tdep->plt_entry_size = 16;
120 /* Enable TLS support. */
121 set_gdbarch_fetch_tls_load_module_address (gdbarch,
122 svr4_fetch_objfile_link_map);
126 /* Provide a prototype to silence -Wmissing-prototypes. */
127 extern void _initialize_sparc64_linux_tdep (void);
130 _initialize_sparc64_linux_tdep (void)
132 gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
133 GDB_OSABI_LINUX, sparc64_linux_init_abi);