| /* Target-dependent code for FreeBSD/sparc64. |
| |
| Copyright (C) 2003-2021 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" |
| #include "gdbarch.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].set_addr (addr + 0 * 8); |
| cache->saved_regs[SPARC64_FSR_REGNUM].set_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].set_addr (addr + 0 * 8); |
| cache->saved_regs[SPARC64_PC_REGNUM].set_addr (addr + 1 * 8); |
| cache->saved_regs[SPARC64_STATE_REGNUM].set_addr (addr + 2 * 8); |
| cache->saved_regs[SPARC64_Y_REGNUM].set_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].set_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].set_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].set_addr (addr); |
| |
| for (regnum = SPARC64_F32_REGNUM; |
| regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8) |
| cache->saved_regs[regnum].set_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 = |
| { |
| "sparc64 freebsd sigtramp", |
| 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); |
| } |
| |
| void _initialize_sparc64fbsd_tdep (); |
| void |
| _initialize_sparc64fbsd_tdep () |
| { |
| gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, |
| GDB_OSABI_FREEBSD, sparc64fbsd_init_abi); |
| } |