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author	Tom Tromey <tromey@redhat.com>	2012-07-12 16:39:42 +0000
committer	Tom Tromey <tromey@redhat.com>	2012-07-12 16:39:42 +0000
commit	93c0ef376838b425ab9aa48c737c7757408df3fd (patch)
tree	eedc8ba01b419a30928960a421f42334adc5cac1 /opcodes/h8500-dis.c
parent	76027ef599f664d2c45574304d304abc962145c2 (diff)
download	gdb-93c0ef376838b425ab9aa48c737c7757408df3fd.zip gdb-93c0ef376838b425ab9aa48c737c7757408df3fd.tar.gz gdb-93c0ef376838b425ab9aa48c737c7757408df3fd.tar.bz2

* lib/gdb.exp (standard_testfile): Don't declare objdir.

(clean_restart): Likewise. (core_find): Use standard_output_file.

Diffstat (limited to 'opcodes/h8500-dis.c')

0 files changed, 0 insertions, 0 deletions

/* Target-dependent code for OpenBSD/sparc. Copyright (C) 2004-2013 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 "floatformat.h" #include "frame.h" #include "frame-unwind.h" #include "gdbcore.h" #include "osabi.h" #include "regcache.h" #include "symtab.h" #include "trad-frame.h" #include "gdb_assert.h" #include "obsd-tdep.h" #include "sparc-tdep.h" #include "solib-svr4.h" #include "bsd-uthread.h" /* Signal trampolines. */ /* The OpenBSD kernel maps the signal trampoline at some random location in user space, which means that the traditional BSD way of detecting it won't work. The signal trampoline will be mapped at an address that is page aligned. We recognize the signal trampoline by looking for the sigreturn system call. */ static const int sparc32obsd_page_size = 4096; static int sparc32obsd_pc_in_sigtramp (CORE_ADDR pc, const char *name) { CORE_ADDR start_pc = (pc & ~(sparc32obsd_page_size - 1)); unsigned long insn; if (name) return 0; /* Check for "restore %g0, SYS_sigreturn, %g1". */ insn = sparc_fetch_instruction (start_pc + 0xec); if (insn != 0x83e82067) return 0; /* Check for "t ST_SYSCALL". */ insn = sparc_fetch_instruction (start_pc + 0xf4); if (insn != 0x91d02000) return 0; return 1; } static struct sparc_frame_cache * sparc32obsd_sigtramp_frame_cache (struct frame_info *this_frame, void **this_cache) { struct sparc_frame_cache *cache; CORE_ADDR addr; if (*this_cache) return *this_cache; cache = sparc_frame_cache (this_frame, this_cache); gdb_assert (cache == *this_cache); /* If we couldn't find the frame's function, we're probably dealing with an on-stack signal trampoline. */ if (cache->pc == 0) { cache->pc = get_frame_pc (this_frame); cache->pc &= ~(sparc32obsd_page_size - 1); /* Since we couldn't find the frame's function, the cache was initialized under the assumption that we're frameless. */ sparc_record_save_insn (cache); addr = get_frame_register_unsigned (this_frame, SPARC_FP_REGNUM); cache->base = addr; } cache->saved_regs = sparc32nbsd_sigcontext_saved_regs (this_frame); return cache; } static void sparc32obsd_sigtramp_frame_this_id (struct frame_info *this_frame, void **this_cache, struct frame_id *this_id) { struct sparc_frame_cache *cache = sparc32obsd_sigtramp_frame_cache (this_frame, this_cache); (*this_id) = frame_id_build (cache->base, cache->pc); } static struct value * sparc32obsd_sigtramp_frame_prev_register (struct frame_info *this_frame, void **this_cache, int regnum) { struct sparc_frame_cache *cache = sparc32obsd_sigtramp_frame_cache (this_frame, this_cache); return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum); } static int sparc32obsd_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 (sparc32obsd_pc_in_sigtramp (pc, name)) return 1; return 0; } static const struct frame_unwind sparc32obsd_sigtramp_frame_unwind = { SIGTRAMP_FRAME, default_frame_unwind_stop_reason, sparc32obsd_sigtramp_frame_this_id, sparc32obsd_sigtramp_frame_prev_register, NULL, sparc32obsd_sigtramp_frame_sniffer }; /* Offset wthin the thread structure where we can find %fp and %i7. */ #define SPARC32OBSD_UTHREAD_FP_OFFSET 128 #define SPARC32OBSD_UTHREAD_PC_OFFSET 132 static void sparc32obsd_supply_uthread (struct regcache *regcache, int regnum, CORE_ADDR addr) { struct gdbarch *gdbarch = get_regcache_arch (regcache); enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); CORE_ADDR fp, fp_addr = addr + SPARC32OBSD_UTHREAD_FP_OFFSET; gdb_byte buf[4]; gdb_assert (regnum >= -1); fp = read_memory_unsigned_integer (fp_addr, 4, byte_order); if (regnum == SPARC_SP_REGNUM || regnum == -1) { store_unsigned_integer (buf, 4, byte_order, fp); regcache_raw_supply (regcache, SPARC_SP_REGNUM, buf); if (regnum == SPARC_SP_REGNUM) return; } if (regnum == SPARC32_PC_REGNUM || regnum == SPARC32_NPC_REGNUM || regnum == -1) { CORE_ADDR i7, i7_addr = addr + SPARC32OBSD_UTHREAD_PC_OFFSET; i7 = read_memory_unsigned_integer (i7_addr, 4, byte_order); if (regnum == SPARC32_PC_REGNUM || regnum == -1) { store_unsigned_integer (buf, 4, byte_order, i7 + 8); regcache_raw_supply (regcache, SPARC32_PC_REGNUM, buf); } if (regnum == SPARC32_NPC_REGNUM || regnum == -1) { store_unsigned_integer (buf, 4, byte_order, i7 + 12); regcache_raw_supply (regcache, SPARC32_NPC_REGNUM, buf); } if (regnum == SPARC32_PC_REGNUM || regnum == SPARC32_NPC_REGNUM) return; } sparc_supply_rwindow (regcache, fp, regnum); } static void sparc32obsd_collect_uthread(const struct regcache *regcache, int regnum, CORE_ADDR addr) { struct gdbarch *gdbarch = get_regcache_arch (regcache); enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); CORE_ADDR sp; gdb_byte buf[4]; gdb_assert (regnum >= -1); if (regnum == SPARC_SP_REGNUM || regnum == -1) { CORE_ADDR fp_addr = addr + SPARC32OBSD_UTHREAD_FP_OFFSET; regcache_raw_collect (regcache, SPARC_SP_REGNUM, buf); write_memory (fp_addr,buf, 4); } if (regnum == SPARC32_PC_REGNUM || regnum == -1) { CORE_ADDR i7, i7_addr = addr + SPARC32OBSD_UTHREAD_PC_OFFSET; regcache_raw_collect (regcache, SPARC32_PC_REGNUM, buf); i7 = extract_unsigned_integer (buf, 4, byte_order) - 8; write_memory_unsigned_integer (i7_addr, 4, byte_order, i7); if (regnum == SPARC32_PC_REGNUM) return; } regcache_raw_collect (regcache, SPARC_SP_REGNUM, buf); sp = extract_unsigned_integer (buf, 4, byte_order); sparc_collect_rwindow (regcache, sp, regnum); } static void sparc32obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); /* OpenBSD/sparc is very similar to NetBSD/sparc ELF. */ sparc32nbsd_elf_init_abi (info, gdbarch); set_gdbarch_skip_solib_resolver (gdbarch, obsd_skip_solib_resolver); frame_unwind_append_unwinder (gdbarch, &sparc32obsd_sigtramp_frame_unwind); /* OpenBSD provides a user-level threads implementation. */ bsd_uthread_set_supply_uthread (gdbarch, sparc32obsd_supply_uthread); bsd_uthread_set_collect_uthread (gdbarch, sparc32obsd_collect_uthread); } /* Provide a prototype to silence -Wmissing-prototypes. */ void _initialize_sparc32obsd_tdep (void); void _initialize_sparc32obsd_tdep (void) { gdbarch_register_osabi (bfd_arch_sparc, 0, GDB_OSABI_OPENBSD_ELF, sparc32obsd_init_abi); }


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