/* Target-dependent code for FreeBSD/sparc64. Copyright 2003, 2004 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 (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, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #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 "gdb_assert.h" #include "gdb_string.h" #include "sparc64-tdep.h" /* From . */ const struct sparc_gregset sparc64fbsd_gregset = { 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_gregset, 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 (regcache, regnum, fpregs); } /* Signal trampolines. */ static int sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, char *name) { return (name && strcmp (name, "__sigtramp") == 0); } static struct sparc_frame_cache * sparc64fbsd_sigtramp_frame_cache (struct frame_info *next_frame, void **this_cache) { struct sparc_frame_cache *cache; CORE_ADDR addr, mcontext_addr, sp; LONGEST fprs; int regnum; if (*this_cache) return *this_cache; cache = sparc_frame_cache (next_frame, this_cache); gdb_assert (cache == *this_cache); cache->saved_regs = trad_frame_alloc_saved_regs (next_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 = frame_unwind_register_unsigned (next_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 (next_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 (next_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 *next_frame, void **this_cache, struct frame_id *this_id) { struct sparc_frame_cache *cache = sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache); (*this_id) = frame_id_build (cache->base, cache->pc); } static void sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *next_frame, void **this_cache, int regnum, int *optimizedp, enum lval_type *lvalp, CORE_ADDR *addrp, int *realnump, void *valuep) { struct sparc_frame_cache *cache = sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache); trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum, optimizedp, lvalp, addrp, realnump, valuep); } static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind = { SIGTRAMP_FRAME, sparc64fbsd_sigtramp_frame_this_id, sparc64fbsd_sigtramp_frame_prev_register }; static const struct frame_unwind * sparc64fbsd_sigtramp_frame_sniffer (struct frame_info *next_frame) { CORE_ADDR pc = frame_pc_unwind (next_frame); char *name; find_pc_partial_function (pc, &name, NULL, NULL); if (sparc64fbsd_pc_in_sigtramp (pc, name)) return &sparc64fbsd_sigtramp_frame_unwind; return NULL; } static void sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); tdep->gregset = regset_alloc (gdbarch, sparc64fbsd_supply_gregset, NULL); tdep->sizeof_gregset = 256; tdep->fpregset = regset_alloc (gdbarch, sparc64fbsd_supply_fpregset, NULL); tdep->sizeof_fpregset = 272; frame_unwind_append_sniffer (gdbarch, sparc64fbsd_sigtramp_frame_sniffer); sparc64_init_abi (info, gdbarch); } /* 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); }