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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [alphafbsd-tdep.c] - Rev 450
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/* Target-dependent code for FreeBSD/alpha. Copyright (C) 2001, 2002, 2003, 2006, 2007, 2008 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 "value.h" #include "osabi.h" #include "alpha-tdep.h" #include "solib-svr4.h" static int alphafbsd_return_in_memory (struct type *type) { enum type_code code; int i; /* All aggregate types that won't fit in a register must be returned in memory. */ if (TYPE_LENGTH (type) > ALPHA_REGISTER_SIZE) return 1; /* The only aggregate types that can be returned in a register are structs and unions. Arrays must be returned in memory. */ code = TYPE_CODE (type); if (code != TYPE_CODE_STRUCT && code != TYPE_CODE_UNION) return 1; /* We need to check if this struct/union is "integer" like. For this to be true, the offset of each adressable subfield must be zero. Note that bit fields are not addressable. */ for (i = 0; i < TYPE_NFIELDS (type); i++) { /* If the field bitsize is non-zero, it isn't adressable. */ if (TYPE_FIELD_BITPOS (type, i) != 0 && TYPE_FIELD_BITSIZE (type, i) == 0) return 1; } return 0; } /* Support for signal handlers. */ /* Return whether PC is in a BSD sigtramp routine. */ CORE_ADDR alphafbsd_sigtramp_start = 0x11ffff68; CORE_ADDR alphafbsd_sigtramp_end = 0x11ffffe0; static int alphafbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name) { return (pc >= alphafbsd_sigtramp_start && pc < alphafbsd_sigtramp_end); } static LONGEST alphafbsd_sigtramp_offset (CORE_ADDR pc) { return pc - alphafbsd_sigtramp_start; } /* Assuming NEXT_FRAME is for a frame following a BSD sigtramp routine, return the address of the associated sigcontext structure. */ static CORE_ADDR alphafbsd_sigcontext_addr (struct frame_info *next_frame) { return frame_unwind_register_unsigned (next_frame, ALPHA_SP_REGNUM) + 24; } /* FreeBSD 5.0-RELEASE or later. */ static void alphafbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); /* Hook into the DWARF CFI frame unwinder. */ alpha_dwarf2_init_abi (info, gdbarch); /* Hook into the MDEBUG frame unwinder. */ alpha_mdebug_init_abi (info, gdbarch); /* FreeBSD/alpha has SVR4-style shared libraries. */ set_solib_svr4_fetch_link_map_offsets (gdbarch, svr4_lp64_fetch_link_map_offsets); tdep->dynamic_sigtramp_offset = alphafbsd_sigtramp_offset; tdep->sigcontext_addr = alphafbsd_sigcontext_addr; tdep->pc_in_sigtramp = alphafbsd_pc_in_sigtramp; tdep->return_in_memory = alphafbsd_return_in_memory; tdep->sc_pc_offset = 288; tdep->sc_regs_offset = 24; tdep->sc_fpregs_offset = 320; tdep->jb_pc = 2; tdep->jb_elt_size = 8; } /* Provide a prototype to silence -Wmissing-prototypes. */ void _initialize_alphafbsd_tdep (void); void _initialize_alphafbsd_tdep (void) { gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_FREEBSD_ELF, alphafbsd_init_abi); }
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