diff options
Diffstat (limited to 'contrib/gdb/gdb/sparc64fbsd-tdep.c')
| -rw-r--r-- | contrib/gdb/gdb/sparc64fbsd-tdep.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/contrib/gdb/gdb/sparc64fbsd-tdep.c b/contrib/gdb/gdb/sparc64fbsd-tdep.c new file mode 100644 index 0000000..3c1335d --- /dev/null +++ b/contrib/gdb/gdb/sparc64fbsd-tdep.c @@ -0,0 +1,225 @@ +/* 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 <machine/reg.h>. */ +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 (regset->descr, 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_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 = XMALLOC (struct regset); + tdep->gregset->descr = &sparc64fbsd_gregset; + tdep->gregset->supply_regset = sparc64fbsd_supply_gregset; + tdep->sizeof_gregset = 256; + + tdep->fpregset = XMALLOC (struct regset); + tdep->fpregset->supply_regset = sparc64fbsd_supply_fpregset; + tdep->sizeof_fpregset = 272; + + set_gdbarch_pc_in_sigtramp (gdbarch, sparc64fbsd_pc_in_sigtramp); + 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); +} |
