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Diffstat (limited to 'gdb/sparc64-fbsd-tdep.c')
| -rw-r--r-- | gdb/sparc64-fbsd-tdep.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/gdb/sparc64-fbsd-tdep.c b/gdb/sparc64-fbsd-tdep.c new file mode 100644 index 00000000000..27ca52e66a2 --- /dev/null +++ b/gdb/sparc64-fbsd-tdep.c @@ -0,0 +1,252 @@ +/* Target-dependent code for FreeBSD/sparc64. + + Copyright (C) 2003-2016 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 "frame.h" +#include "frame-unwind.h" +#include "gdbcore.h" +#include "osabi.h" +#include "regcache.h" +#include "regset.h" +#include "target.h" +#include "trad-frame.h" + +#include "sparc64-tdep.h" +#include "fbsd-tdep.h" +#include "solib-svr4.h" + +/* From <machine/reg.h>. */ +const struct sparc_gregmap sparc64fbsd_gregmap = +{ + 26 * 8, /* "tstate" */ + 25 * 8, /* %pc */ + 24 * 8, /* %npc */ + 28 * 8, /* %y */ + 16 * 8, /* %fprs */ + -1, + 1 * 8, /* %g1 */ + -1, /* %l0 */ + 8 /* sizeof (%y) */ +}; + + +static void +sparc64fbsd_supply_gregset (const struct regset *regset, + struct regcache *regcache, + int regnum, const void *gregs, size_t len) +{ + sparc64_supply_gregset (&sparc64fbsd_gregmap, regcache, regnum, gregs); +} + +static void +sparc64fbsd_collect_gregset (const struct regset *regset, + const struct regcache *regcache, + int regnum, void *gregs, size_t len) +{ + sparc64_collect_gregset (&sparc64fbsd_gregmap, regcache, regnum, gregs); +} + +static void +sparc64fbsd_supply_fpregset (const struct regset *regset, + struct regcache *regcache, + int regnum, const void *fpregs, size_t len) +{ + sparc64_supply_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs); +} + +static void +sparc64fbsd_collect_fpregset (const struct regset *regset, + const struct regcache *regcache, + int regnum, void *fpregs, size_t len) +{ + sparc64_collect_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs); +} + + +/* Signal trampolines. */ + +static int +sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, const char *name) +{ + return (name && strcmp (name, "__sigtramp") == 0); +} + +static struct sparc_frame_cache * +sparc64fbsd_sigtramp_frame_cache (struct frame_info *this_frame, + void **this_cache) +{ + struct sparc_frame_cache *cache; + CORE_ADDR addr, mcontext_addr, sp; + LONGEST fprs; + int regnum; + + if (*this_cache) + return (struct sparc_frame_cache *) *this_cache; + + cache = sparc_frame_cache (this_frame, this_cache); + gdb_assert (cache == *this_cache); + + cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); + + /* The third argument is a pointer to an instance of `ucontext_t', + which has a member `uc_mcontext' that contains the saved + registers. */ + addr = get_frame_register_unsigned (this_frame, SPARC_O2_REGNUM); + mcontext_addr = addr + 64; + + /* The following registers travel in the `mc_local' slots of + `mcontext_t'. */ + addr = mcontext_addr + 16 * 8; + cache->saved_regs[SPARC64_FPRS_REGNUM].addr = addr + 0 * 8; + cache->saved_regs[SPARC64_FSR_REGNUM].addr = addr + 1 * 8; + + /* The following registers travel in the `mc_in' slots of + `mcontext_t'. */ + addr = mcontext_addr + 24 * 8; + cache->saved_regs[SPARC64_NPC_REGNUM].addr = addr + 0 * 8; + cache->saved_regs[SPARC64_PC_REGNUM].addr = addr + 1 * 8; + cache->saved_regs[SPARC64_STATE_REGNUM].addr = addr + 2 * 8; + cache->saved_regs[SPARC64_Y_REGNUM].addr = addr + 4 * 8; + + /* The `global' and `out' registers travel in the `mc_global' and + `mc_out' slots of `mcontext_t', except for %g0. Since %g0 is + always zero, keep the identity encoding. */ + for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 8; + regnum <= SPARC_O7_REGNUM; regnum++, addr += 8) + cache->saved_regs[regnum].addr = addr; + + /* The `local' and `in' registers have been saved in the register + save area. */ + addr = cache->saved_regs[SPARC_SP_REGNUM].addr; + sp = get_frame_memory_unsigned (this_frame, addr, 8); + for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS; + regnum <= SPARC_I7_REGNUM; regnum++, addr += 8) + cache->saved_regs[regnum].addr = addr; + + /* The floating-point registers are only saved if the FEF bit in + %fprs has been set. */ + +#define FPRS_FEF (1 << 2) + + addr = cache->saved_regs[SPARC64_FPRS_REGNUM].addr; + fprs = get_frame_memory_unsigned (this_frame, addr, 8); + if (fprs & FPRS_FEF) + { + for (regnum = SPARC_F0_REGNUM, addr = mcontext_addr + 32 * 8; + regnum <= SPARC_F31_REGNUM; regnum++, addr += 4) + cache->saved_regs[regnum].addr = addr; + + for (regnum = SPARC64_F32_REGNUM; + regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8) + cache->saved_regs[regnum].addr = addr; + } + + return cache; +} + +static void +sparc64fbsd_sigtramp_frame_this_id (struct frame_info *this_frame, + void **this_cache, + struct frame_id *this_id) +{ + struct sparc_frame_cache *cache = + sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache); + + (*this_id) = frame_id_build (cache->base, cache->pc); +} + +static struct value * +sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *this_frame, + void **this_cache, int regnum) +{ + struct sparc_frame_cache *cache = + sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache); + + return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum); +} + +static int +sparc64fbsd_sigtramp_frame_sniffer (const struct frame_unwind *self, + struct frame_info *this_frame, + void **this_cache) +{ + CORE_ADDR pc = get_frame_pc (this_frame); + const char *name; + + find_pc_partial_function (pc, &name, NULL, NULL); + if (sparc64fbsd_pc_in_sigtramp (pc, name)) + return 1; + + return 0; +} + +static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind = +{ + SIGTRAMP_FRAME, + default_frame_unwind_stop_reason, + sparc64fbsd_sigtramp_frame_this_id, + sparc64fbsd_sigtramp_frame_prev_register, + NULL, + sparc64fbsd_sigtramp_frame_sniffer +}; + + +static const struct regset sparc64fbsd_gregset = + { + NULL, sparc64fbsd_supply_gregset, sparc64fbsd_collect_gregset + }; + +static const struct regset sparc64fbsd_fpregset = + { + NULL, sparc64fbsd_supply_fpregset, sparc64fbsd_collect_fpregset + }; + +static void +sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) +{ + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); + + /* Generic FreeBSD support. */ + fbsd_init_abi (info, gdbarch); + + tdep->gregset = &sparc64fbsd_gregset; + tdep->sizeof_gregset = 256; + + tdep->fpregset = &sparc64fbsd_fpregset; + tdep->sizeof_fpregset = 272; + + frame_unwind_append_unwinder (gdbarch, &sparc64fbsd_sigtramp_frame_unwind); + + sparc64_init_abi (info, gdbarch); + + /* FreeBSD/sparc64 has SVR4-style shared libraries. */ + set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); + set_solib_svr4_fetch_link_map_offsets + (gdbarch, svr4_lp64_fetch_link_map_offsets); +} + +/* Provide a prototype to silence -Wmissing-prototypes. */ +void _initialize_sparc64fbsd_tdep (void); + +void +_initialize_sparc64fbsd_tdep (void) +{ + gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, + GDB_OSABI_FREEBSD_ELF, sparc64fbsd_init_abi); +} |