/* Target-dependent code for GNU/Linux Super-H.
- Copyright (C) 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2005-2018 Free Software Foundation, Inc.
This file is part of GDB.
#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
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
-}
-/* Provide a prototype to silence -Wmissing-prototypes. */
-extern void _initialize_sh_linux_tdep (void);
+ 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)