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Diffstat (limited to 'gdb/i386-nto-tdep.c')
| -rw-r--r-- | gdb/i386-nto-tdep.c | 298 |
1 files changed, 0 insertions, 298 deletions
diff --git a/gdb/i386-nto-tdep.c b/gdb/i386-nto-tdep.c deleted file mode 100644 index b35dd2a13b7..00000000000 --- a/gdb/i386-nto-tdep.c +++ /dev/null @@ -1,298 +0,0 @@ -/* i386-nto-tdep.c - i386 specific functionality for QNX Neutrino. - - Copyright 2003 Free Software Foundation, Inc. - - Contributed by QNX Software Systems Ltd. - - 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 "gdb_string.h" -#include "gdb_assert.h" -#include "defs.h" -#include "frame.h" -#include "target.h" -#include "regcache.h" -#include "solib-svr4.h" -#include "i386-tdep.h" -#include "nto-tdep.h" -#include "osabi.h" -#include "i387-tdep.h" - -#ifndef X86_CPU_FXSR -#define X86_CPU_FXSR (1L << 12) -#endif - -/* Why 13? Look in our /usr/include/x86/context.h header at the - x86_cpu_registers structure and you'll see an 'exx' junk register - that is just filler. Don't ask me, ask the kernel guys. */ -#define NUM_GPREGS 13 - -/* Map a GDB register number to an offset in the reg structure. */ -static int regmap[] = { - (7 * 4), /* eax */ - (6 * 4), /* ecx */ - (5 * 4), /* edx */ - (4 * 4), /* ebx */ - (11 * 4), /* esp */ - (2 * 4), /* epb */ - (1 * 4), /* esi */ - (0 * 4), /* edi */ - (8 * 4), /* eip */ - (10 * 4), /* eflags */ - (9 * 4), /* cs */ - (12 * 4), /* ss */ - (-1 * 4) /* filler */ -}; - -/* Given a gdb regno, return the offset into Neutrino's register structure - or -1 if register is unknown. */ -static int -nto_reg_offset (int regno) -{ - return (regno >= 0 && regno < NUM_GPREGS) ? regmap[regno] : -1; -} - -static void -i386nto_supply_gregset (char *gpregs) -{ - unsigned regno; - int empty = 0; - - for (regno = 0; regno < FP0_REGNUM; regno++) - { - int offset = nto_reg_offset (regno); - if (offset == -1) - supply_register (regno, (char *) &empty); - else - supply_register (regno, gpregs + offset); - } -} - -static void -i386nto_supply_fpregset (char *fpregs) -{ - if (nto_cpuinfo_valid && nto_cpuinfo_flags | X86_CPU_FXSR) - i387_supply_fxsave (fpregs); - else - i387_supply_fsave (fpregs); -} - -static void -i386nto_supply_regset (int regset, char *data) -{ - switch (regset) - { - case NTO_REG_GENERAL: /* QNX has different ordering of GP regs than GDB. */ - i386nto_supply_gregset (data); - break; - case NTO_REG_FLOAT: - i386nto_supply_fpregset (data); - break; - } -} - -static int -i386nto_regset_id (int regno) -{ - if (regno == -1) - return NTO_REG_END; - else if (regno < FP0_REGNUM) - return NTO_REG_GENERAL; - else if (regno < FPC_REGNUM) - return NTO_REG_FLOAT; - - return -1; /* Error. */ -} - -static int -i386nto_register_area (int regno, int regset, unsigned *off) -{ - int len; - - *off = 0; - if (regset == NTO_REG_GENERAL) - { - if (regno == -1) - return NUM_GPREGS * 4; - - *off = nto_reg_offset (regno); - if (*off == -1) - return 0; - return 4; - } - else if (regset == NTO_REG_FLOAT) - { - unsigned off_adjust, regsize, regset_size; - - if (nto_cpuinfo_valid && nto_cpuinfo_flags | X86_CPU_FXSR) - { - off_adjust = 32; - regsize = 16; - regset_size = 512; - } - else - { - off_adjust = 28; - regsize = 10; - regset_size = 128; - } - - if (regno == -1) - return regset_size; - - *off = (regno - FP0_REGNUM) * regsize + off_adjust; - return 10; - /* Why 10 instead of regsize? GDB only stores 10 bytes per FP - register so if we're sending a register back to the target, - we only want pdebug to write 10 bytes so as not to clobber - the reserved 6 bytes in the fxsave structure. */ - } - return -1; -} - -static int -i386nto_regset_fill (int regset, char *data) -{ - if (regset == NTO_REG_GENERAL) - { - int regno; - - for (regno = 0; regno < NUM_GPREGS; regno++) - { - int offset = nto_reg_offset (regno); - if (offset != -1) - regcache_collect (regno, data + offset); - } - } - else if (regset == NTO_REG_FLOAT) - { - if (nto_cpuinfo_valid && nto_cpuinfo_flags | X86_CPU_FXSR) - i387_fill_fxsave (data, -1); - else - i387_fill_fsave (data, -1); - } - else - return -1; - - return 0; -} - -static struct link_map_offsets * -i386nto_svr4_fetch_link_map_offsets (void) -{ - static struct link_map_offsets lmo; - static struct link_map_offsets *lmp = NULL; - - if (lmp == NULL) - { - lmp = &lmo; - - lmo.r_debug_size = 8; /* The actual size is 20 bytes, but - only 8 bytes are used. */ - lmo.r_map_offset = 4; - lmo.r_map_size = 4; - - lmo.link_map_size = 20; /* The actual size is 552 bytes, but - only 20 bytes are used. */ - lmo.l_addr_offset = 0; - lmo.l_addr_size = 4; - - lmo.l_name_offset = 4; - lmo.l_name_size = 4; - - lmo.l_next_offset = 12; - lmo.l_next_size = 4; - - lmo.l_prev_offset = 16; - lmo.l_prev_size = 4; - } - - return lmp; -} - -static int -i386nto_pc_in_sigtramp (CORE_ADDR pc, char *name) -{ - return name && strcmp ("__signalstub", name) == 0; -} - -#define SIGCONTEXT_OFFSET 136 -static CORE_ADDR -i386nto_sigcontext_addr (struct frame_info *frame) -{ - if (get_next_frame (frame)) - return get_frame_base (get_next_frame (frame)) + SIGCONTEXT_OFFSET; - - return read_register (SP_REGNUM) + SIGCONTEXT_OFFSET; -} - -static void -init_i386nto_ops (void) -{ - current_nto_target.nto_regset_id = i386nto_regset_id; - current_nto_target.nto_supply_gregset = i386nto_supply_gregset; - current_nto_target.nto_supply_fpregset = i386nto_supply_fpregset; - current_nto_target.nto_supply_altregset = nto_dummy_supply_regset; - current_nto_target.nto_supply_regset = i386nto_supply_regset; - current_nto_target.nto_register_area = i386nto_register_area; - current_nto_target.nto_regset_fill = i386nto_regset_fill; - current_nto_target.nto_fetch_link_map_offsets = - i386nto_svr4_fetch_link_map_offsets; -} - -static void -i386nto_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - - /* NTO uses ELF. */ - i386_elf_init_abi (info, gdbarch); - - /* Neutrino rewinds to look more normal. */ - set_gdbarch_decr_pc_after_break (gdbarch, 0); - - /* NTO has shared libraries. */ - set_gdbarch_in_solib_call_trampoline (gdbarch, in_plt_section); - set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); - - set_gdbarch_pc_in_sigtramp (gdbarch, i386nto_pc_in_sigtramp); - tdep->sigcontext_addr = i386nto_sigcontext_addr; - tdep->sc_pc_offset = 56; - tdep->sc_sp_offset = 68; - - /* Setjmp()'s return PC saved in EDX (5). */ - tdep->jb_pc_offset = 20; /* 5x32 bit ints in. */ - - set_solib_svr4_fetch_link_map_offsets (gdbarch, - i386nto_svr4_fetch_link_map_offsets); - - /* Our loader handles solib relocations slightly differently than svr4. */ - TARGET_SO_RELOCATE_SECTION_ADDRESSES = nto_relocate_section_addresses; - - /* Supply a nice function to find our solibs. */ - TARGET_SO_FIND_AND_OPEN_SOLIB = nto_find_and_open_solib; - - init_i386nto_ops (); -} - -void -_initialize_i386nto_tdep (void) -{ - gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_QNXNTO, - i386nto_init_abi); -} |