167 lines
5 KiB
C
167 lines
5 KiB
C
/* Target-dependent code for Solaris x86.
|
||
|
||
Copyright (C) 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011
|
||
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 "gdb_string.h"
|
||
|
||
#include "sol2-tdep.h"
|
||
#include "i386-tdep.h"
|
||
#include "solib-svr4.h"
|
||
|
||
/* From <ia32/sys/reg.h>. */
|
||
static int i386_sol2_gregset_reg_offset[] =
|
||
{
|
||
11 * 4, /* %eax */
|
||
10 * 4, /* %ecx */
|
||
9 * 4, /* %edx */
|
||
8 * 4, /* %ebx */
|
||
17 * 4, /* %esp */
|
||
6 * 4, /* %ebp */
|
||
5 * 4, /* %esi */
|
||
4 * 4, /* %edi */
|
||
14 * 4, /* %eip */
|
||
16 * 4, /* %eflags */
|
||
15 * 4, /* %cs */
|
||
18 * 4, /* %ss */
|
||
3 * 4, /* %ds */
|
||
2 * 4, /* %es */
|
||
1 * 4, /* %fs */
|
||
0 * 4 /* %gs */
|
||
};
|
||
|
||
/* Return whether THIS_FRAME corresponds to a Solaris sigtramp
|
||
routine. */
|
||
|
||
static int
|
||
i386_sol2_sigtramp_p (struct frame_info *this_frame)
|
||
{
|
||
CORE_ADDR pc = get_frame_pc (this_frame);
|
||
char *name;
|
||
|
||
find_pc_partial_function (pc, &name, NULL, NULL);
|
||
return (name && (strcmp ("sigacthandler", name) == 0
|
||
|| strcmp (name, "ucbsigvechandler") == 0));
|
||
}
|
||
|
||
/* Solaris doesn't have a `struct sigcontext', but it does have a
|
||
`mcontext_t' that contains the saved set of machine registers. */
|
||
|
||
static CORE_ADDR
|
||
i386_sol2_mcontext_addr (struct frame_info *this_frame)
|
||
{
|
||
CORE_ADDR sp, ucontext_addr;
|
||
|
||
sp = get_frame_register_unsigned (this_frame, I386_ESP_REGNUM);
|
||
ucontext_addr = get_frame_memory_unsigned (this_frame, sp + 8, 4);
|
||
|
||
return ucontext_addr + 36;
|
||
}
|
||
|
||
/* SunPRO encodes the static variables. This is not related to C++
|
||
mangling, it is done for C too. */
|
||
|
||
static char *
|
||
i386_sol2_static_transform_name (char *name)
|
||
{
|
||
char *p;
|
||
if (name[0] == '.')
|
||
{
|
||
/* For file-local statics there will be a period, a bunch of
|
||
junk (the contents of which match a string given in the
|
||
N_OPT), a period and the name. For function-local statics
|
||
there will be a bunch of junk (which seems to change the
|
||
second character from 'A' to 'B'), a period, the name of the
|
||
function, and the name. So just skip everything before the
|
||
last period. */
|
||
p = strrchr (name, '.');
|
||
if (p != NULL)
|
||
name = p + 1;
|
||
}
|
||
return name;
|
||
}
|
||
|
||
/* Solaris 2. */
|
||
|
||
static void
|
||
i386_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
/* Solaris is SVR4-based. */
|
||
i386_svr4_init_abi (info, gdbarch);
|
||
|
||
/* The SunPRO compiler puts out 0 instead of the address in N_SO symbols,
|
||
and for SunPRO 3.0, N_FUN symbols too. */
|
||
set_gdbarch_sofun_address_maybe_missing (gdbarch, 1);
|
||
|
||
/* Handle SunPRO encoding of static symbols. */
|
||
set_gdbarch_static_transform_name (gdbarch, i386_sol2_static_transform_name);
|
||
|
||
/* Solaris reserves space for its FPU emulator in `fpregset_t'.
|
||
There is also some space reserved for the registers of a Weitek
|
||
math coprocessor. */
|
||
tdep->gregset_reg_offset = i386_sol2_gregset_reg_offset;
|
||
tdep->gregset_num_regs = ARRAY_SIZE (i386_sol2_gregset_reg_offset);
|
||
tdep->sizeof_gregset = 19 * 4;
|
||
tdep->sizeof_fpregset = 380;
|
||
|
||
/* Signal trampolines are slightly different from SVR4. */
|
||
tdep->sigtramp_p = i386_sol2_sigtramp_p;
|
||
tdep->sigcontext_addr = i386_sol2_mcontext_addr;
|
||
tdep->sc_reg_offset = tdep->gregset_reg_offset;
|
||
tdep->sc_num_regs = tdep->gregset_num_regs;
|
||
|
||
/* Solaris has SVR4-style shared libraries. */
|
||
set_gdbarch_skip_solib_resolver (gdbarch, sol2_skip_solib_resolver);
|
||
set_solib_svr4_fetch_link_map_offsets
|
||
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
|
||
|
||
/* How to print LWP PTIDs from core files. */
|
||
set_gdbarch_core_pid_to_str (gdbarch, sol2_core_pid_to_str);
|
||
}
|
||
|
||
|
||
static enum gdb_osabi
|
||
i386_sol2_osabi_sniffer (bfd *abfd)
|
||
{
|
||
/* If we have a section named .SUNW_version, then it is almost
|
||
certainly Solaris 2. */
|
||
if (bfd_get_section_by_name (abfd, ".SUNW_version"))
|
||
return GDB_OSABI_SOLARIS;
|
||
|
||
return GDB_OSABI_UNKNOWN;
|
||
}
|
||
|
||
/* Provide a prototype to silence -Wmissing-prototypes. */
|
||
void _initialize_i386_sol2_tdep (void);
|
||
|
||
void
|
||
_initialize_i386_sol2_tdep (void)
|
||
{
|
||
/* Register an ELF OS ABI sniffer for Solaris 2 binaries. */
|
||
gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
|
||
i386_sol2_osabi_sniffer);
|
||
|
||
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SOLARIS,
|
||
i386_sol2_init_abi);
|
||
}
|