/* Target-dependent code for QNX Neutrino x86.
- Copyright 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.
Contributed by QNX Software Systems Ltd.
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
+ 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,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-#include "gdb_string.h"
-#include "gdb_assert.h"
#include "defs.h"
#include "frame.h"
-#include "target.h"
+#include "osabi.h"
#include "regcache.h"
-#include "solib-svr4.h"
+#include "target.h"
+
+#include "gdb_assert.h"
+#include "gdb_string.h"
+
#include "i386-tdep.h"
-#include "nto-tdep.h"
-#include "osabi.h"
#include "i387-tdep.h"
+#include "nto-tdep.h"
+#include "solib.h"
+#include "solib-svr4.h"
+
+/* Target vector for QNX NTO x86. */
+static struct nto_target_ops i386_nto_target;
#ifndef X86_CPU_FXSR
#define X86_CPU_FXSR (1L << 12)
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 */
+/* Mapping between the general-purpose registers in `struct xxx'
+ format and GDB's register cache layout. */
+
+/* From <x86/context.h>. */
+static int i386nto_gregset_reg_offset[] =
+{
+ 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 /* filler */
};
-/* Given a gdb regno, return the offset into Neutrino's register structure
- or -1 if register is unknown. */
+/* Given a GDB register number REGNUM, return the offset into
+ Neutrino's register structure or -1 if the register is unknown. */
+
static int
-nto_reg_offset (int regno)
+nto_reg_offset (int regnum)
{
- return (regno >= 0 && regno < NUM_GPREGS) ? regmap[regno] : -1;
+ if (regnum >= 0 && regnum < ARRAY_SIZE (i386nto_gregset_reg_offset))
+ return i386nto_gregset_reg_offset[regnum];
+
+ return -1;
}
static void
-i386nto_supply_gregset (char *gpregs)
+i386nto_supply_gregset (struct regcache *regcache, char *gpregs)
{
- unsigned regno;
- int empty = 0;
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- for (regno = 0; regno < FP0_REGNUM; regno++)
- {
- int offset = nto_reg_offset (regno);
- if (offset == -1)
- regcache_raw_supply (current_regcache, regno, (char *) &empty);
- else
- regcache_raw_supply (current_regcache, regno, gpregs + offset);
- }
+ if(tdep->gregset == NULL)
+ tdep->gregset = regset_alloc (gdbarch, i386_supply_gregset,
+ i386_collect_gregset);
+
+ gdb_assert (tdep->gregset_reg_offset == i386nto_gregset_reg_offset);
+ tdep->gregset->supply_regset (tdep->gregset, regcache, -1,
+ gpregs, NUM_GPREGS * 4);
}
static void
-i386nto_supply_fpregset (char *fpregs)
+i386nto_supply_fpregset (struct regcache *regcache, char *fpregs)
{
if (nto_cpuinfo_valid && nto_cpuinfo_flags | X86_CPU_FXSR)
- i387_supply_fxsave (current_regcache, -1, fpregs);
+ i387_supply_fxsave (regcache, -1, fpregs);
else
- i387_supply_fsave (current_regcache, -1, fpregs);
+ i387_supply_fsave (regcache, -1, fpregs);
}
static void
-i386nto_supply_regset (int regset, char *data)
+i386nto_supply_regset (struct regcache *regcache, int regset, char *data)
{
switch (regset)
{
- case NTO_REG_GENERAL: /* QNX has different ordering of GP regs than GDB. */
- i386nto_supply_gregset (data);
+ case NTO_REG_GENERAL:
+ i386nto_supply_gregset (regcache, data);
break;
case NTO_REG_FLOAT:
- i386nto_supply_fpregset (data);
+ i386nto_supply_fpregset (regcache, data);
break;
}
}
{
if (regno == -1)
return NTO_REG_END;
- else if (regno < FP0_REGNUM)
+ else if (regno < I386_NUM_GREGS)
return NTO_REG_GENERAL;
- else if (regno < FPC_REGNUM)
+ else if (regno < I386_NUM_GREGS + I386_NUM_FREGS)
return NTO_REG_FLOAT;
return -1; /* Error. */
if (regno == -1)
return regset_size;
- *off = (regno - FP0_REGNUM) * regsize + off_adjust;
+ *off = (regno - gdbarch_fp0_regnum (current_gdbarch))
+ * 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,
}
static int
-i386nto_regset_fill (int regset, char *data)
+i386nto_regset_fill (const struct regcache *regcache, int regset, char *data)
{
if (regset == NTO_REG_GENERAL)
{
{
int offset = nto_reg_offset (regno);
if (offset != -1)
- regcache_raw_collect (current_regcache, regno, data + offset);
+ regcache_raw_collect (regcache, regno, data + offset);
}
}
else if (regset == NTO_REG_FLOAT)
{
if (nto_cpuinfo_valid && nto_cpuinfo_flags | X86_CPU_FXSR)
- i387_fill_fxsave (data, -1);
+ i387_collect_fxsave (regcache, -1, data);
else
- i387_fill_fsave (data, -1);
+ i387_collect_fsave (regcache, -1, data);
}
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;
-}
-
/* Return whether the frame preceding NEXT_FRAME corresponds to a QNX
Neutrino sigtramp routine. */
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;
+ i386_nto_target.regset_id = i386nto_regset_id;
+ i386_nto_target.supply_gregset = i386nto_supply_gregset;
+ i386_nto_target.supply_fpregset = i386nto_supply_fpregset;
+ i386_nto_target.supply_altregset = nto_dummy_supply_regset;
+ i386_nto_target.supply_regset = i386nto_supply_regset;
+ i386_nto_target.register_area = i386nto_register_area;
+ i386_nto_target.regset_fill = i386nto_regset_fill;
+ i386_nto_target.fetch_link_map_offsets =
+ svr4_ilp32_fetch_link_map_offsets;
}
static void
i386nto_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ static struct target_so_ops nto_svr4_so_ops;
+
+ /* Deal with our strange signals. */
+ nto_initialize_signals ();
/* NTO uses ELF. */
i386_elf_init_abi (info, gdbarch);
default which is [unfortunately] to decrement the PC. */
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);
+ tdep->gregset_reg_offset = i386nto_gregset_reg_offset;
+ tdep->gregset_num_regs = ARRAY_SIZE (i386nto_gregset_reg_offset);
+ tdep->sizeof_gregset = NUM_GPREGS * 4;
tdep->sigtramp_p = i386nto_sigtramp_p;
tdep->sigcontext_addr = i386nto_sigcontext_addr;
/* 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);
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
- /* Our loader handles solib relocations slightly differently than svr4. */
- TARGET_SO_RELOCATE_SECTION_ADDRESSES = nto_relocate_section_addresses;
+ /* Initialize this lazily, to avoid an initialization order
+ dependency on solib-svr4.c's _initialize routine. */
+ if (nto_svr4_so_ops.in_dynsym_resolve_code == NULL)
+ {
+ nto_svr4_so_ops = svr4_so_ops;
- /* Supply a nice function to find our solibs. */
- TARGET_SO_FIND_AND_OPEN_SOLIB = nto_find_and_open_solib;
+ /* Our loader handles solib relocations differently than svr4. */
+ nto_svr4_so_ops.relocate_section_addresses
+ = nto_relocate_section_addresses;
- init_i386nto_ops ();
+ /* Supply a nice function to find our solibs. */
+ nto_svr4_so_ops.find_and_open_solib
+ = nto_find_and_open_solib;
+
+ /* Our linker code is in libc. */
+ nto_svr4_so_ops.in_dynsym_resolve_code
+ = nto_in_dynsym_resolve_code;
+ }
+ set_solib_ops (gdbarch, &nto_svr4_so_ops);
+
+ nto_set_target (&i386_nto_target);
}
void
_initialize_i386nto_tdep (void)
{
+ init_i386nto_ops ();
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_QNXNTO,
i386nto_init_abi);
+ gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
+ nto_elf_osabi_sniffer);
}
projects / deliverable / binutils-gdb.git / blobdiff