/* Target-dependent code for GNU/Linux Super-H.
- Copyright (C) 2005 Free Software Foundation, Inc.
+ Copyright (C) 2005-2020 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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ 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"
+#include "gdbarch.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);
-/* Provide a prototype to silence -Wmissing-prototypes. */
-extern void _initialize_sh_linux_tdep (void);
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
+
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* Remember regset characteristics. The sizes should match
+ elf_gregset_t and elf_fpregset_t from Linux. */
+ tdep->core_gregmap = (struct sh_corefile_regmap *) gregs_table;
+ tdep->sizeof_gregset = 92;
+ tdep->core_fpregmap = (struct sh_corefile_regmap *) fpregs_table;
+ tdep->sizeof_fpregset = 136;
+
+ tramp_frame_prepend_unwinder (gdbarch, &sh_linux_sigreturn_tramp_frame);
+ tramp_frame_prepend_unwinder (gdbarch, &sh_linux_rt_sigreturn_tramp_frame);
+}
+void _initialize_sh_linux_tdep ();
void
-_initialize_sh_linux_tdep (void)
+_initialize_sh_linux_tdep ()
{
gdbarch_register_osabi (bfd_arch_sh, 0, GDB_OSABI_LINUX, sh_linux_init_abi);
}
projects / deliverable / binutils-gdb.git / blobdiff