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386c036b MK |
1 | /* Target-dependent code for GNU/Linux UltraSPARC. |
2 | ||
a33e488c | 3 | Copyright 2003, 2004, 2005 Free Software Foundation, Inc. |
386c036b MK |
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., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "defs.h" | |
78a0fd57 DM |
23 | #include "frame.h" |
24 | #include "frame-unwind.h" | |
81f726ab | 25 | #include "tramp-frame.h" |
386c036b MK |
26 | #include "gdbarch.h" |
27 | #include "osabi.h" | |
b2756930 | 28 | #include "solib-svr4.h" |
78a0fd57 DM |
29 | #include "symtab.h" |
30 | #include "trad-frame.h" | |
31 | ||
386c036b MK |
32 | #include "sparc64-tdep.h" |
33 | ||
78a0fd57 DM |
34 | /* The instruction sequence for RT signals is |
35 | mov __NR_rt_sigreturn, %g1 ! hex: 0x82102065 | |
36 | ta 0x6d ! hex: 0x91d0206d | |
37 | ||
38 | The effect is to call the system call rt_sigreturn. | |
39 | Note that 64-bit binaries only use this RT signal return method. */ | |
40 | ||
41 | #define LINUX64_RT_SIGTRAMP_INSN0 0x82102065 | |
42 | #define LINUX64_RT_SIGTRAMP_INSN1 0x91d0206d | |
43 | ||
78a0fd57 | 44 | |
81f726ab DM |
45 | static void sparc64_linux_sigframe_init (const struct tramp_frame *self, |
46 | struct frame_info *next_frame, | |
47 | struct trad_frame_cache *this_cache, | |
48 | CORE_ADDR func); | |
78a0fd57 | 49 | |
81f726ab DM |
50 | static const struct tramp_frame sparc64_linux_rt_sigframe = { |
51 | SIGTRAMP_FRAME, | |
52 | 4, | |
53 | { | |
54 | { LINUX64_RT_SIGTRAMP_INSN0, -1 }, | |
55 | { LINUX64_RT_SIGTRAMP_INSN1, -1 }, | |
56 | { TRAMP_SENTINEL_INSN, -1 } | |
57 | }, | |
58 | sparc64_linux_sigframe_init | |
59 | }; | |
78a0fd57 | 60 | |
81f726ab DM |
61 | static void |
62 | sparc64_linux_sigframe_init (const struct tramp_frame *self, | |
63 | struct frame_info *next_frame, | |
64 | struct trad_frame_cache *this_cache, | |
65 | CORE_ADDR func) | |
78a0fd57 | 66 | { |
81f726ab | 67 | CORE_ADDR base, addr; |
78a0fd57 DM |
68 | int regnum; |
69 | ||
81f726ab DM |
70 | base = frame_unwind_register_unsigned (next_frame, SPARC_O1_REGNUM); |
71 | base += 128; | |
78a0fd57 DM |
72 | |
73 | /* Offsets from <bits/sigcontext.h> */ | |
74 | ||
75 | /* Since %g0 is always zero, keep the identity encoding. */ | |
81f726ab DM |
76 | addr = base + 0x08; |
77 | for (regnum = SPARC_G1_REGNUM; regnum <= SPARC_O7_REGNUM; regnum++) | |
78 | { | |
79 | trad_frame_set_reg_addr (this_cache, regnum, addr); | |
80 | addr += 8; | |
81 | } | |
78a0fd57 | 82 | |
81f726ab DM |
83 | trad_frame_set_reg_addr (this_cache, SPARC64_STATE_REGNUM, addr + 0x00); |
84 | trad_frame_set_reg_addr (this_cache, SPARC64_PC_REGNUM, addr + 0x08); | |
85 | trad_frame_set_reg_addr (this_cache, SPARC64_NPC_REGNUM, addr + 0x10); | |
86 | trad_frame_set_reg_addr (this_cache, SPARC64_Y_REGNUM, addr + 0x18); | |
87 | trad_frame_set_reg_addr (this_cache, SPARC64_FPRS_REGNUM, addr + 0x1c); | |
78a0fd57 | 88 | |
81f726ab DM |
89 | addr = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM); |
90 | if (addr & 1) | |
91 | addr += BIAS; | |
78a0fd57 | 92 | |
81f726ab DM |
93 | base = addr; |
94 | for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++) | |
95 | { | |
96 | trad_frame_set_reg_addr (this_cache, regnum, addr); | |
97 | addr += 8; | |
98 | } | |
99 | trad_frame_set_id (this_cache, frame_id_build (base, func)); | |
78a0fd57 DM |
100 | } |
101 | \f | |
386c036b MK |
102 | static void |
103 | sparc64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
104 | { | |
105 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
106 | ||
81f726ab | 107 | tramp_frame_prepend_unwinder (gdbarch, &sparc64_linux_rt_sigframe); |
78a0fd57 | 108 | |
a33e488c MK |
109 | /* GNU/Linux has SVR4-style shared libraries... */ |
110 | set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); | |
111 | set_solib_svr4_fetch_link_map_offsets | |
112 | (gdbarch, svr4_lp64_fetch_link_map_offsets); | |
386c036b | 113 | |
a33e488c MK |
114 | /* ...which means that we need some special handling when doing |
115 | prologue analysis. */ | |
116 | tdep->plt_entry_size = 16; | |
b2756930 KB |
117 | |
118 | /* Enable TLS support. */ | |
119 | set_gdbarch_fetch_tls_load_module_address (gdbarch, | |
120 | svr4_fetch_objfile_link_map); | |
386c036b MK |
121 | } |
122 | ||
123 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
124 | extern void _initialize_sparc64_linux_tdep (void); | |
125 | ||
126 | void | |
127 | _initialize_sparc64_linux_tdep (void) | |
128 | { | |
129 | gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, | |
130 | GDB_OSABI_LINUX, sparc64_linux_init_abi); | |
131 | } |