| /* Target-dependent code for GNU/Linux Super-H. |
| |
| Copyright (C) 2005, 2007-2012 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include "osabi.h" |
| |
| #include "solib-svr4.h" |
| #include "symtab.h" |
| |
| #include "trad-frame.h" |
| #include "tramp-frame.h" |
| |
| #include "glibc-tdep.h" |
| #include "sh-tdep.h" |
| #include "linux-tdep.h" |
| |
| #define REGSx16(base) \ |
| {(base), 0}, \ |
| {(base) + 1, 4}, \ |
| {(base) + 2, 8}, \ |
| {(base) + 3, 12}, \ |
| {(base) + 4, 16}, \ |
| {(base) + 5, 20}, \ |
| {(base) + 6, 24}, \ |
| {(base) + 7, 28}, \ |
| {(base) + 8, 32}, \ |
| {(base) + 9, 36}, \ |
| {(base) + 10, 40}, \ |
| {(base) + 11, 44}, \ |
| {(base) + 12, 48}, \ |
| {(base) + 13, 52}, \ |
| {(base) + 14, 56}, \ |
| {(base) + 15, 60} |
| |
| /* Describe the contents of the .reg section of the core file. */ |
| |
| static const struct sh_corefile_regmap gregs_table[] = |
| { |
| REGSx16 (R0_REGNUM), |
| {PC_REGNUM, 64}, |
| {PR_REGNUM, 68}, |
| {SR_REGNUM, 72}, |
| {GBR_REGNUM, 76}, |
| {MACH_REGNUM, 80}, |
| {MACL_REGNUM, 84}, |
| {-1 /* Terminator. */, 0} |
| }; |
| |
| /* Describe the contents of the .reg2 section of the core file. */ |
| |
| static const struct sh_corefile_regmap fpregs_table[] = |
| { |
| REGSx16 (FR0_REGNUM), |
| /* REGSx16 xfp_regs omitted. */ |
| {FPSCR_REGNUM, 128}, |
| {FPUL_REGNUM, 132}, |
| {-1 /* Terminator. */, 0} |
| }; |
| |
| /* SH signal handler frame support. */ |
| |
| static void |
| sh_linux_sigtramp_cache (struct frame_info *this_frame, |
| struct trad_frame_cache *this_cache, |
| CORE_ADDR func, int regs_offset) |
| { |
| int i; |
| struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| CORE_ADDR base = get_frame_register_unsigned (this_frame, |
| gdbarch_sp_regnum (gdbarch)); |
| CORE_ADDR regs = base + regs_offset; |
| |
| for (i = 0; i < 18; i++) |
| trad_frame_set_reg_addr (this_cache, i, regs + i * 4); |
| |
| trad_frame_set_reg_addr (this_cache, SR_REGNUM, regs + 18 * 4); |
| trad_frame_set_reg_addr (this_cache, GBR_REGNUM, regs + 19 * 4); |
| trad_frame_set_reg_addr (this_cache, MACH_REGNUM, regs + 20 * 4); |
| trad_frame_set_reg_addr (this_cache, MACL_REGNUM, regs + 21 * 4); |
| |
| /* Restore FP state if we have an FPU. */ |
| if (gdbarch_fp0_regnum (gdbarch) != -1) |
| { |
| CORE_ADDR fpregs = regs + 22 * 4; |
| for (i = FR0_REGNUM; i <= FP_LAST_REGNUM; i++) |
| trad_frame_set_reg_addr (this_cache, i, fpregs + i * 4); |
| trad_frame_set_reg_addr (this_cache, FPSCR_REGNUM, fpregs + 32 * 4); |
| trad_frame_set_reg_addr (this_cache, FPUL_REGNUM, fpregs + 33 * 4); |
| } |
| |
| /* Save a frame ID. */ |
| trad_frame_set_id (this_cache, frame_id_build (base, func)); |
| } |
| |
| /* Implement struct tramp_frame "init" callbacks for signal |
| trampolines on 32-bit SH. */ |
| |
| static void |
| sh_linux_sigreturn_init (const struct tramp_frame *self, |
| struct frame_info *this_frame, |
| struct trad_frame_cache *this_cache, |
| CORE_ADDR func) |
| { |
| /* SH 32-bit sigframe: sigcontext at start of sigframe, |
| registers start after a single 'oldmask' word. */ |
| sh_linux_sigtramp_cache (this_frame, this_cache, func, 4); |
| } |
| |
| static void |
| sh_linux_rt_sigreturn_init (const struct tramp_frame *self, |
| struct frame_info *this_frame, |
| struct trad_frame_cache *this_cache, |
| CORE_ADDR func) |
| { |
| /* SH 32-bit rt_sigframe: starts with a siginfo (128 bytes), then |
| we can find sigcontext embedded within a ucontext (offset 20 bytes). |
| Then registers start after a single 'oldmask' word. */ |
| sh_linux_sigtramp_cache (this_frame, this_cache, func, |
| 128 /* sizeof (struct siginfo) */ |
| + 20 /* offsetof (struct ucontext, uc_mcontext) */ |
| + 4 /* oldmask word at start of sigcontext */); |
| } |
| |
| /* Instruction patterns. */ |
| #define SH_MOVW 0x9305 |
| #define SH_TRAP 0xc300 |
| #define SH_OR_R0_R0 0x200b |
| |
| /* SH sigreturn syscall numbers. */ |
| #define SH_NR_SIGRETURN 0x0077 |
| #define SH_NR_RT_SIGRETURN 0x00ad |
| |
| static struct tramp_frame sh_linux_sigreturn_tramp_frame = { |
| SIGTRAMP_FRAME, |
| 2, |
| { |
| { SH_MOVW, 0xffff }, |
| { SH_TRAP, 0xff00 }, /* #imm argument part filtered out. */ |
| { SH_OR_R0_R0, 0xffff }, |
| { SH_OR_R0_R0, 0xffff }, |
| { SH_OR_R0_R0, 0xffff }, |
| { SH_OR_R0_R0, 0xffff }, |
| { SH_OR_R0_R0, 0xffff }, |
| { SH_NR_SIGRETURN, 0xffff }, |
| { TRAMP_SENTINEL_INSN } |
| }, |
| sh_linux_sigreturn_init |
| }; |
| |
| static struct tramp_frame sh_linux_rt_sigreturn_tramp_frame = { |
| SIGTRAMP_FRAME, |
| 2, |
| { |
| { SH_MOVW, 0xffff }, |
| { SH_TRAP, 0xff00 }, /* #imm argument part filtered out. */ |
| { SH_OR_R0_R0, 0xffff }, |
| { SH_OR_R0_R0, 0xffff }, |
| { SH_OR_R0_R0, 0xffff }, |
| { SH_OR_R0_R0, 0xffff }, |
| { SH_OR_R0_R0, 0xffff }, |
| { SH_NR_RT_SIGRETURN, 0xffff }, |
| { TRAMP_SENTINEL_INSN } |
| }, |
| sh_linux_rt_sigreturn_init |
| }; |
| |
| static void |
| sh_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| { |
| linux_init_abi (info, gdbarch); |
| |
| /* GNU/Linux uses SVR4-style shared libraries. */ |
| set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); |
| set_solib_svr4_fetch_link_map_offsets |
| (gdbarch, svr4_ilp32_fetch_link_map_offsets); |
| set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver); |
| |
| set_gdbarch_fetch_tls_load_module_address (gdbarch, |
| svr4_fetch_objfile_link_map); |
| |
| /* Core files and signal handler frame unwinding are supported for |
| 32-bit SH only, at present. */ |
| if (info.bfd_arch_info->mach != bfd_mach_sh5) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| |
| tdep->core_gregmap = (struct sh_corefile_regmap *)gregs_table; |
| tdep->core_fpregmap = (struct sh_corefile_regmap *)fpregs_table; |
| |
| tramp_frame_prepend_unwinder (gdbarch, &sh_linux_sigreturn_tramp_frame); |
| tramp_frame_prepend_unwinder (gdbarch, &sh_linux_rt_sigreturn_tramp_frame); |
| } |
| } |
| |
| /* Provide a prototype to silence -Wmissing-prototypes. */ |
| extern void _initialize_sh_linux_tdep (void); |
| |
| void |
| _initialize_sh_linux_tdep (void) |
| { |
| gdbarch_register_osabi (bfd_arch_sh, 0, GDB_OSABI_LINUX, sh_linux_init_abi); |
| } |