diff options
Diffstat (limited to 'contrib/gdb/gdb/sparcobsd-tdep.c')
| -rw-r--r-- | contrib/gdb/gdb/sparcobsd-tdep.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/contrib/gdb/gdb/sparcobsd-tdep.c b/contrib/gdb/gdb/sparcobsd-tdep.c deleted file mode 100644 index 108e255ed130..000000000000 --- a/contrib/gdb/gdb/sparcobsd-tdep.c +++ /dev/null @@ -1,171 +0,0 @@ -/* Target-dependent code for OpenBSD/sparc. - - Copyright 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 "floatformat.h" -#include "frame.h" -#include "frame-unwind.h" -#include "osabi.h" -#include "solib-svr4.h" -#include "symtab.h" -#include "trad-frame.h" - -#include "gdb_assert.h" - -#include "sparc-tdep.h" -#include "nbsd-tdep.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 the looking for the - sigreturn system call. */ - -static const int sparc32obsd_page_size = 4096; - -static int -sparc32obsd_pc_in_sigtramp (CORE_ADDR pc, 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_frame_cache (struct frame_info *next_frame, void **this_cache) -{ - struct sparc_frame_cache *cache; - CORE_ADDR addr; - - if (*this_cache) - return *this_cache; - - cache = sparc_frame_cache (next_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 = frame_pc_unwind (next_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. */ - cache->frameless_p = 0; - addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM); - cache->base = addr; - } - - cache->saved_regs = sparc32nbsd_sigcontext_saved_regs (next_frame); - - return cache; -} - -static void -sparc32obsd_frame_this_id (struct frame_info *next_frame, void **this_cache, - struct frame_id *this_id) -{ - struct sparc_frame_cache *cache = - sparc32obsd_frame_cache (next_frame, this_cache); - - (*this_id) = frame_id_build (cache->base, cache->pc); -} - -static void -sparc32obsd_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 = - sparc32obsd_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 sparc32obsd_frame_unwind = -{ - SIGTRAMP_FRAME, - sparc32obsd_frame_this_id, - sparc32obsd_frame_prev_register -}; - -static const struct frame_unwind * -sparc32obsd_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 (sparc32obsd_pc_in_sigtramp (pc, name)) - return &sparc32obsd_frame_unwind; - - return NULL; -} - - -static void -sparc32obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - - /* OpenBSD doesn't support the 128-bit `long double' from the psABI. */ - set_gdbarch_long_double_bit (gdbarch, 64); - set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big); - - set_gdbarch_pc_in_sigtramp (gdbarch, sparc32obsd_pc_in_sigtramp); - frame_unwind_append_sniffer (gdbarch, sparc32obsd_sigtramp_frame_sniffer); - - set_solib_svr4_fetch_link_map_offsets - (gdbarch, nbsd_ilp32_solib_svr4_fetch_link_map_offsets); -} - - -/* 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); -} |