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ccf00f21 MK |
1 | /* Target-dependent code for GNU/Linux Super-H. |
2 | ||
ecd75fc8 | 3 | Copyright (C) 2005-2014 Free Software Foundation, Inc. |
ccf00f21 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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
ccf00f21 MK |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
ccf00f21 MK |
19 | |
20 | #include "defs.h" | |
21 | #include "osabi.h" | |
22 | ||
23 | #include "solib-svr4.h" | |
982e9687 | 24 | #include "symtab.h" |
ccf00f21 | 25 | |
1e1f6591 CLT |
26 | #include "trad-frame.h" |
27 | #include "tramp-frame.h" | |
28 | ||
e25c958c | 29 | #include "glibc-tdep.h" |
c9ac0a72 | 30 | #include "sh-tdep.h" |
a5ee0f0c | 31 | #include "linux-tdep.h" |
c9ac0a72 AS |
32 | |
33 | #define REGSx16(base) \ | |
34 | {(base), 0}, \ | |
35 | {(base) + 1, 4}, \ | |
36 | {(base) + 2, 8}, \ | |
37 | {(base) + 3, 12}, \ | |
38 | {(base) + 4, 16}, \ | |
39 | {(base) + 5, 20}, \ | |
40 | {(base) + 6, 24}, \ | |
41 | {(base) + 7, 28}, \ | |
42 | {(base) + 8, 32}, \ | |
43 | {(base) + 9, 36}, \ | |
44 | {(base) + 10, 40}, \ | |
45 | {(base) + 11, 44}, \ | |
46 | {(base) + 12, 48}, \ | |
47 | {(base) + 13, 52}, \ | |
48 | {(base) + 14, 56}, \ | |
49 | {(base) + 15, 60} | |
50 | ||
51 | /* Describe the contents of the .reg section of the core file. */ | |
52 | ||
53 | static const struct sh_corefile_regmap gregs_table[] = | |
54 | { | |
55 | REGSx16 (R0_REGNUM), | |
56 | {PC_REGNUM, 64}, | |
57 | {PR_REGNUM, 68}, | |
58 | {SR_REGNUM, 72}, | |
59 | {GBR_REGNUM, 76}, | |
60 | {MACH_REGNUM, 80}, | |
61 | {MACL_REGNUM, 84}, | |
62 | {-1 /* Terminator. */, 0} | |
63 | }; | |
64 | ||
65 | /* Describe the contents of the .reg2 section of the core file. */ | |
66 | ||
67 | static const struct sh_corefile_regmap fpregs_table[] = | |
68 | { | |
69 | REGSx16 (FR0_REGNUM), | |
70 | /* REGSx16 xfp_regs omitted. */ | |
71 | {FPSCR_REGNUM, 128}, | |
72 | {FPUL_REGNUM, 132}, | |
73 | {-1 /* Terminator. */, 0} | |
74 | }; | |
e25c958c | 75 | |
1e1f6591 CLT |
76 | /* SH signal handler frame support. */ |
77 | ||
78 | static void | |
79 | sh_linux_sigtramp_cache (struct frame_info *this_frame, | |
80 | struct trad_frame_cache *this_cache, | |
81 | CORE_ADDR func, int regs_offset) | |
82 | { | |
83 | int i; | |
84 | struct gdbarch *gdbarch = get_frame_arch (this_frame); | |
85 | CORE_ADDR base = get_frame_register_unsigned (this_frame, | |
86 | gdbarch_sp_regnum (gdbarch)); | |
87 | CORE_ADDR regs = base + regs_offset; | |
88 | ||
89 | for (i = 0; i < 18; i++) | |
90 | trad_frame_set_reg_addr (this_cache, i, regs + i * 4); | |
91 | ||
92 | trad_frame_set_reg_addr (this_cache, SR_REGNUM, regs + 18 * 4); | |
93 | trad_frame_set_reg_addr (this_cache, GBR_REGNUM, regs + 19 * 4); | |
94 | trad_frame_set_reg_addr (this_cache, MACH_REGNUM, regs + 20 * 4); | |
95 | trad_frame_set_reg_addr (this_cache, MACL_REGNUM, regs + 21 * 4); | |
96 | ||
97 | /* Restore FP state if we have an FPU. */ | |
98 | if (gdbarch_fp0_regnum (gdbarch) != -1) | |
99 | { | |
100 | CORE_ADDR fpregs = regs + 22 * 4; | |
101 | for (i = FR0_REGNUM; i <= FP_LAST_REGNUM; i++) | |
102 | trad_frame_set_reg_addr (this_cache, i, fpregs + i * 4); | |
103 | trad_frame_set_reg_addr (this_cache, FPSCR_REGNUM, fpregs + 32 * 4); | |
104 | trad_frame_set_reg_addr (this_cache, FPUL_REGNUM, fpregs + 33 * 4); | |
105 | } | |
106 | ||
107 | /* Save a frame ID. */ | |
108 | trad_frame_set_id (this_cache, frame_id_build (base, func)); | |
109 | } | |
110 | ||
111 | /* Implement struct tramp_frame "init" callbacks for signal | |
112 | trampolines on 32-bit SH. */ | |
113 | ||
114 | static void | |
115 | sh_linux_sigreturn_init (const struct tramp_frame *self, | |
116 | struct frame_info *this_frame, | |
117 | struct trad_frame_cache *this_cache, | |
118 | CORE_ADDR func) | |
119 | { | |
120 | /* SH 32-bit sigframe: sigcontext at start of sigframe, | |
121 | registers start after a single 'oldmask' word. */ | |
122 | sh_linux_sigtramp_cache (this_frame, this_cache, func, 4); | |
123 | } | |
124 | ||
125 | static void | |
126 | sh_linux_rt_sigreturn_init (const struct tramp_frame *self, | |
127 | struct frame_info *this_frame, | |
128 | struct trad_frame_cache *this_cache, | |
129 | CORE_ADDR func) | |
130 | { | |
131 | /* SH 32-bit rt_sigframe: starts with a siginfo (128 bytes), then | |
132 | we can find sigcontext embedded within a ucontext (offset 20 bytes). | |
133 | Then registers start after a single 'oldmask' word. */ | |
134 | sh_linux_sigtramp_cache (this_frame, this_cache, func, | |
135 | 128 /* sizeof (struct siginfo) */ | |
136 | + 20 /* offsetof (struct ucontext, uc_mcontext) */ | |
137 | + 4 /* oldmask word at start of sigcontext */); | |
138 | } | |
139 | ||
140 | /* Instruction patterns. */ | |
141 | #define SH_MOVW 0x9305 | |
142 | #define SH_TRAP 0xc300 | |
143 | #define SH_OR_R0_R0 0x200b | |
144 | ||
145 | /* SH sigreturn syscall numbers. */ | |
146 | #define SH_NR_SIGRETURN 0x0077 | |
147 | #define SH_NR_RT_SIGRETURN 0x00ad | |
148 | ||
149 | static struct tramp_frame sh_linux_sigreturn_tramp_frame = { | |
150 | SIGTRAMP_FRAME, | |
151 | 2, | |
152 | { | |
153 | { SH_MOVW, 0xffff }, | |
154 | { SH_TRAP, 0xff00 }, /* #imm argument part filtered out. */ | |
155 | { SH_OR_R0_R0, 0xffff }, | |
156 | { SH_OR_R0_R0, 0xffff }, | |
157 | { SH_OR_R0_R0, 0xffff }, | |
158 | { SH_OR_R0_R0, 0xffff }, | |
159 | { SH_OR_R0_R0, 0xffff }, | |
160 | { SH_NR_SIGRETURN, 0xffff }, | |
161 | { TRAMP_SENTINEL_INSN } | |
162 | }, | |
163 | sh_linux_sigreturn_init | |
164 | }; | |
165 | ||
166 | static struct tramp_frame sh_linux_rt_sigreturn_tramp_frame = { | |
167 | SIGTRAMP_FRAME, | |
168 | 2, | |
169 | { | |
170 | { SH_MOVW, 0xffff }, | |
171 | { SH_TRAP, 0xff00 }, /* #imm argument part filtered out. */ | |
172 | { SH_OR_R0_R0, 0xffff }, | |
173 | { SH_OR_R0_R0, 0xffff }, | |
174 | { SH_OR_R0_R0, 0xffff }, | |
175 | { SH_OR_R0_R0, 0xffff }, | |
176 | { SH_OR_R0_R0, 0xffff }, | |
177 | { SH_NR_RT_SIGRETURN, 0xffff }, | |
178 | { TRAMP_SENTINEL_INSN } | |
179 | }, | |
180 | sh_linux_rt_sigreturn_init | |
181 | }; | |
182 | ||
ccf00f21 MK |
183 | static void |
184 | sh_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
185 | { | |
a5ee0f0c PA |
186 | linux_init_abi (info, gdbarch); |
187 | ||
ccf00f21 | 188 | /* GNU/Linux uses SVR4-style shared libraries. */ |
982e9687 | 189 | set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); |
ccf00f21 MK |
190 | set_solib_svr4_fetch_link_map_offsets |
191 | (gdbarch, svr4_ilp32_fetch_link_map_offsets); | |
e25c958c DJ |
192 | set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver); |
193 | ||
194 | set_gdbarch_fetch_tls_load_module_address (gdbarch, | |
195 | svr4_fetch_objfile_link_map); | |
c9ac0a72 | 196 | |
1e1f6591 CLT |
197 | /* Core files and signal handler frame unwinding are supported for |
198 | 32-bit SH only, at present. */ | |
c9ac0a72 AS |
199 | if (info.bfd_arch_info->mach != bfd_mach_sh5) |
200 | { | |
201 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
202 | ||
203 | tdep->core_gregmap = (struct sh_corefile_regmap *)gregs_table; | |
204 | tdep->core_fpregmap = (struct sh_corefile_regmap *)fpregs_table; | |
1e1f6591 CLT |
205 | |
206 | tramp_frame_prepend_unwinder (gdbarch, &sh_linux_sigreturn_tramp_frame); | |
207 | tramp_frame_prepend_unwinder (gdbarch, &sh_linux_rt_sigreturn_tramp_frame); | |
c9ac0a72 | 208 | } |
ccf00f21 MK |
209 | } |
210 | ||
211 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
212 | extern void _initialize_sh_linux_tdep (void); | |
213 | ||
214 | void | |
215 | _initialize_sh_linux_tdep (void) | |
216 | { | |
217 | gdbarch_register_osabi (bfd_arch_sh, 0, GDB_OSABI_LINUX, sh_linux_init_abi); | |
218 | } |