/* Target-dependent code for Solaris SPARC. Copyright (C) 2003-2023 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 "symtab.h" #include "objfiles.h" #include "osabi.h" #include "regcache.h" #include "regset.h" #include "target.h" #include "trad-frame.h" #include "sol2-tdep.h" #include "sparc-tdep.h" #include "solib-svr4.h" /* From <sys/regset.h>. */ const struct sparc_gregmap sparc32_sol2_gregmap = { 32 * 4, /* %psr */ 33 * 4, /* %pc */ 34 * 4, /* %npc */ 35 * 4, /* %y */ 36 * 4, /* %wim */ 37 * 4, /* %tbr */ 1 * 4, /* %g1 */ 16 * 4, /* %l0 */ }; const struct sparc_fpregmap sparc32_sol2_fpregmap = { 0 * 4, /* %f0 */ 33 * 4, /* %fsr */ }; static void sparc32_sol2_supply_core_gregset (const struct regset *regset, struct regcache *regcache, int regnum, const void *gregs, size_t len) { sparc32_supply_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs); } static void sparc32_sol2_collect_core_gregset (const struct regset *regset, const struct regcache *regcache, int regnum, void *gregs, size_t len) { sparc32_collect_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs); } static void sparc32_sol2_supply_core_fpregset (const struct regset *regset, struct regcache *regcache, int regnum, const void *fpregs, size_t len) { sparc32_supply_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs); } static void sparc32_sol2_collect_core_fpregset (const struct regset *regset, const struct regcache *regcache, int regnum, void *fpregs, size_t len) { sparc32_collect_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs); } static const struct regset sparc32_sol2_gregset = { NULL, sparc32_sol2_supply_core_gregset, sparc32_sol2_collect_core_gregset }; static const struct regset sparc32_sol2_fpregset = { NULL, sparc32_sol2_supply_core_fpregset, sparc32_sol2_collect_core_fpregset }; static struct sparc_frame_cache * sparc32_sol2_sigtramp_frame_cache (frame_info_ptr this_frame, void **this_cache) { struct sparc_frame_cache *cache; CORE_ADDR mcontext_addr, addr; 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. */ regnum = (cache->copied_regs_mask & 0x04) ? SPARC_I2_REGNUM : SPARC_O2_REGNUM; mcontext_addr = get_frame_register_unsigned (this_frame, regnum) + 40; cache->saved_regs[SPARC32_PSR_REGNUM].set_addr (mcontext_addr + 0 * 4); cache->saved_regs[SPARC32_PC_REGNUM].set_addr (mcontext_addr + 1 * 4); cache->saved_regs[SPARC32_NPC_REGNUM].set_addr (mcontext_addr + 2 * 4); cache->saved_regs[SPARC32_Y_REGNUM].set_addr (mcontext_addr + 3 * 4); /* Since %g0 is always zero, keep the identity encoding. */ for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 4; regnum <= SPARC_O7_REGNUM; regnum++, addr += 4) cache->saved_regs[regnum].set_addr (addr); if (get_frame_memory_unsigned (this_frame, mcontext_addr + 19 * 4, 4)) { /* The register windows haven't been flushed. */ for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++) cache->saved_regs[regnum].set_unknown (); } else { addr = cache->saved_regs[SPARC_SP_REGNUM].addr (); addr = get_frame_memory_unsigned (this_frame, addr, 4); for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++, addr += 4) cache->saved_regs[regnum].set_addr (addr); } return cache; } static void sparc32_sol2_sigtramp_frame_this_id (frame_info_ptr this_frame, void **this_cache, struct frame_id *this_id) { struct sparc_frame_cache *cache = sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache); (*this_id) = frame_id_build (cache->base, cache->pc); } static struct value * sparc32_sol2_sigtramp_frame_prev_register (frame_info_ptr this_frame, void **this_cache, int regnum) { struct sparc_frame_cache *cache = sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache); return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum); } static int sparc32_sol2_sigtramp_frame_sniffer (const struct frame_unwind *self, frame_info_ptr this_frame, void **this_cache) { return sol2_sigtramp_p (this_frame); } static const struct frame_unwind sparc32_sol2_sigtramp_frame_unwind = { "sparc32 solaris sigtramp", SIGTRAMP_FRAME, default_frame_unwind_stop_reason, sparc32_sol2_sigtramp_frame_this_id, sparc32_sol2_sigtramp_frame_prev_register, NULL, sparc32_sol2_sigtramp_frame_sniffer }; static void sparc32_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { sparc_gdbarch_tdep *tdep = gdbarch_tdep<sparc_gdbarch_tdep> (gdbarch); tdep->gregset = &sparc32_sol2_gregset; tdep->sizeof_gregset = 152; tdep->fpregset = &sparc32_sol2_fpregset; tdep->sizeof_fpregset = 400; sol2_init_abi (info, gdbarch); /* Solaris has SVR4-style shared libraries... */ set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); set_solib_svr4_fetch_link_map_offsets (gdbarch, svr4_ilp32_fetch_link_map_offsets); /* ...which means that we need some special handling when doing prologue analysis. */ tdep->plt_entry_size = 12; /* Solaris has kernel-assisted single-stepping support. */ set_gdbarch_software_single_step (gdbarch, NULL); frame_unwind_append_unwinder (gdbarch, &sparc32_sol2_sigtramp_frame_unwind); } void _initialize_sparc_sol2_tdep (); void _initialize_sparc_sol2_tdep () { gdbarch_register_osabi (bfd_arch_sparc, 0, GDB_OSABI_SOLARIS, sparc32_sol2_init_abi); }