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- /* Target-dependent code for FreeBSD/sparc64.
- Copyright (C) 2003-2022 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)
- {
- sparc_gdbarch_tdep *tdep = (sparc_gdbarch_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);
- }
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