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binutils-gdb/bfd/elf32-sparc.c
Maciej W. Rozycki a2f63b2e7a ELF/BFD,GDB: Handle both variants of the 32-bit Linux core PRPSINFO note 
Fix commit 70a38d42c5 ("New entry points for writing Linux NT_PRPSINFO
notes."), <https://sourceware.org/ml/binutils/2013-02/msg00023.html>,
and commit b3ac9c7756 ("Put more info in NT_PRPSINFO Linux notes"),
<https://sourceware.org/ml/binutils/2013-02/msg00024.html>, and handle
both variants of the 32-bit Linux core PRPSINFO note across all targets.

The 32-bit Linux core PRPSINFO note matches the 32-bit kernel structure,
defined as follows:

(gdb) ptype struct elf_prpsinfo
type = struct elf_prpsinfo {
    char pr_state;
    char pr_sname;
    char pr_zomb;
    char pr_nice;
    unsigned long pr_flag;
    __kernel_uid_t pr_uid;
    __kernel_gid_t pr_gid;
    pid_t pr_pid;
    pid_t pr_ppid;
    pid_t pr_pgrp;
    pid_t pr_sid;
    char pr_fname[16];
    char pr_psargs[80];
}
(gdb)

where the individual data types of most members are the same across all
32-bit Linux ports, with the exception of `__kernel_uid_t' and
`__kernel_gid_t'.  These are defined in <asm-generic/posix_types.h> as
32-bit `unsigned int' by default, however overridden as 16-bit `unsigned
short' in port-specific <asm/posix_types.h> for a few targets, mostly
earlier ports of Linux, specifically: ARM, CRIS, FR-V, M32R, m68k,
MN10300/AM33, s390, SuperH, SPARC and i386.

The default is the same as the PowerPC variant already handled, as from
the commits referred.  Make the special PowerPC case generic then,
removing the GDB part, and provide a backend flag to switch between the
two cases possible, with the 32-bit one being the default and the 16-bit
one explicitly selected.  Set the flag in the target backends affected.

	bfd/
	* elf-bfd.h (elf_backend_data): Add `linux_prpsinfo32_ugid16'
	member.
	(elfcore_write_ppc_linux_prpsinfo32): Remove prototype.
	* elf32-ppc.c (elfcore_write_ppc_linux_prpsinfo32): Remove.
	(elf_external_ppc_linux_prpsinfo32)
	(swap_ppc_linux_prpsinfo32_out): Move to...
	* elf-linux-core.h (elf_external_linux_prpsinfo32_ugid32)
	(swap_linux_prpsinfo32_ugid32_out): ... these.
	(elf_external_linux_prpsinfo32): Rename to...
	(elf_external_linux_prpsinfo32_ugid16): ... this.
	(swap_linux_prpsinfo32_out): Rename to...
	(swap_linux_prpsinfo32_ugid16_out): ... this.
	* elfxx-target.h [!elf_backend_linux_prpsinfo32_ugid16]
	(elf_backend_linux_prpsinfo32_ugid16): Define.
	(elfNN_bed): Initialize `linux_prpsinfo32_ugid16' member.
	* elf.c (elfcore_write_linux_prpsinfo32): Handle both variants
	of the 32-bit Linux core PRPSINFO note.
	* elf32-am33lin.c (elf_backend_linux_prpsinfo32_ugid16): Define.
	* elf32-arm.c (elf_backend_linux_prpsinfo32_ugid16): Define.
	* elf32-cris.c (elf_backend_linux_prpsinfo32_ugid16): Define.
	* elf32-frv.c (elf_backend_linux_prpsinfo32_ugid16): Define.
	* elf32-i386.c (elf_backend_linux_prpsinfo32_ugid16): Define.
	* elf32-m32r.c (elf_backend_linux_prpsinfo32_ugid16): Define.
	* elf32-m68k.c (elf_backend_linux_prpsinfo32_ugid16): Define.
	* elf32-s390.c (elf_backend_linux_prpsinfo32_ugid16): Define.
	* elf32-sh.c (elf_backend_linux_prpsinfo32_ugid16): Define.
	* elf32-sparc.c (elf_backend_linux_prpsinfo32_ugid16): Define.

	gdb/
	* ppc-linux-tdep.c (ppc_linux_init_abi): Remove call to
	`set_gdbarch_elfcore_write_linux_prpsinfo'.
2017-10-11 15:01:40 +01:00

362 lines
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/* SPARC-specific support for 32-bit ELF
Copyright (C) 1993-2017 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
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, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include "bfd.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/sparc.h"
#include "opcode/sparc.h"
#include "elfxx-sparc.h"
#include "elf-vxworks.h"
/* Support for core dump NOTE sections. */
static bfd_boolean
elf32_sparc_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
{
switch (note->descsz)
{
default:
return FALSE;
case 260: /* Solaris prpsinfo_t. */
elf_tdata (abfd)->core->program
= _bfd_elfcore_strndup (abfd, note->descdata + 84, 16);
elf_tdata (abfd)->core->command
= _bfd_elfcore_strndup (abfd, note->descdata + 100, 80);
break;
case 336: /* Solaris psinfo_t. */
elf_tdata (abfd)->core->program
= _bfd_elfcore_strndup (abfd, note->descdata + 88, 16);
elf_tdata (abfd)->core->command
= _bfd_elfcore_strndup (abfd, note->descdata + 104, 80);
break;
}
return TRUE;
}
/* Functions for dealing with the e_flags field.
We don't define set_private_flags or copy_private_bfd_data because
the only currently defined values are based on the bfd mach number,
so we use the latter instead and defer setting e_flags until the
file is written out. */
/* Merge backend specific data from an object file to the output
object file when linking. */
static bfd_boolean
elf32_sparc_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
{
bfd *obfd = info->output_bfd;
bfd_boolean error;
unsigned long ibfd_mach;
/* FIXME: This should not be static. */
static unsigned long previous_ibfd_e_flags = (unsigned long) -1;
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
return TRUE;
error = FALSE;
ibfd_mach = bfd_get_mach (ibfd);
if (bfd_mach_sparc_64bit_p (ibfd_mach))
{
error = TRUE;
_bfd_error_handler
(_("%B: compiled for a 64 bit system and target is 32 bit"), ibfd);
}
else if ((ibfd->flags & DYNAMIC) == 0)
{
if (bfd_get_mach (obfd) < ibfd_mach)
bfd_set_arch_mach (obfd, bfd_arch_sparc, ibfd_mach);
}
if (((elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA)
!= previous_ibfd_e_flags)
&& previous_ibfd_e_flags != (unsigned long) -1)
{
_bfd_error_handler
(_("%B: linking little endian files with big endian files"), ibfd);
error = TRUE;
}
previous_ibfd_e_flags = elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA;
if (error)
{
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
return _bfd_sparc_elf_merge_private_bfd_data (ibfd, info);
}
/* The final processing done just before writing out the object file.
We need to set the e_machine field appropriately. */
static void
elf32_sparc_final_write_processing (bfd *abfd,
bfd_boolean linker ATTRIBUTE_UNUSED)
{
switch (bfd_get_mach (abfd))
{
case bfd_mach_sparc :
case bfd_mach_sparc_sparclet :
case bfd_mach_sparc_sparclite :
break; /* nothing to do */
case bfd_mach_sparc_v8plus :
elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS;
break;
case bfd_mach_sparc_v8plusa :
elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1;
break;
case bfd_mach_sparc_v8plusb :
case bfd_mach_sparc_v8plusc :
case bfd_mach_sparc_v8plusd :
case bfd_mach_sparc_v8pluse :
case bfd_mach_sparc_v8plusv :
case bfd_mach_sparc_v8plusm :
case bfd_mach_sparc_v8plusm8 :
elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1
| EF_SPARC_SUN_US3;
break;
case bfd_mach_sparc_sparclite_le :
elf_elfheader (abfd)->e_flags |= EF_SPARC_LEDATA;
break;
default :
abort ();
break;
}
}
static enum elf_reloc_type_class
elf32_sparc_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
const asection *rel_sec ATTRIBUTE_UNUSED,
const Elf_Internal_Rela *rela)
{
switch ((int) ELF32_R_TYPE (rela->r_info))
{
case R_SPARC_RELATIVE:
return reloc_class_relative;
case R_SPARC_JMP_SLOT:
return reloc_class_plt;
case R_SPARC_COPY:
return reloc_class_copy;
default:
return reloc_class_normal;
}
}
/* Hook called by the linker routine which adds symbols from an object
file. */
static bfd_boolean
elf32_sparc_add_symbol_hook (bfd * abfd,
struct bfd_link_info * info,
Elf_Internal_Sym * sym,
const char ** namep ATTRIBUTE_UNUSED,
flagword * flagsp ATTRIBUTE_UNUSED,
asection ** secp ATTRIBUTE_UNUSED,
bfd_vma * valp ATTRIBUTE_UNUSED)
{
if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
&& (abfd->flags & DYNAMIC) == 0
&& bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
return TRUE;
}
#define TARGET_BIG_SYM sparc_elf32_vec
#define TARGET_BIG_NAME "elf32-sparc"
#define ELF_ARCH bfd_arch_sparc
#define ELF_TARGET_ID SPARC_ELF_DATA
#define ELF_MACHINE_CODE EM_SPARC
#define ELF_MACHINE_ALT1 EM_SPARC32PLUS
#define ELF_MAXPAGESIZE 0x10000
#define ELF_COMMONPAGESIZE 0x2000
#define bfd_elf32_bfd_merge_private_bfd_data \
elf32_sparc_merge_private_bfd_data
#define elf_backend_final_write_processing \
elf32_sparc_final_write_processing
#define elf_backend_grok_psinfo elf32_sparc_grok_psinfo
#define elf_backend_reloc_type_class elf32_sparc_reloc_type_class
#define elf_info_to_howto _bfd_sparc_elf_info_to_howto
#define bfd_elf32_bfd_reloc_type_lookup _bfd_sparc_elf_reloc_type_lookup
#define bfd_elf32_bfd_reloc_name_lookup \
_bfd_sparc_elf_reloc_name_lookup
#define bfd_elf32_bfd_link_hash_table_create \
_bfd_sparc_elf_link_hash_table_create
#define bfd_elf32_bfd_relax_section _bfd_sparc_elf_relax_section
#define bfd_elf32_new_section_hook _bfd_sparc_elf_new_section_hook
#define elf_backend_copy_indirect_symbol \
_bfd_sparc_elf_copy_indirect_symbol
#define elf_backend_create_dynamic_sections \
_bfd_sparc_elf_create_dynamic_sections
#define elf_backend_check_relocs _bfd_sparc_elf_check_relocs
#define elf_backend_adjust_dynamic_symbol \
_bfd_sparc_elf_adjust_dynamic_symbol
#define elf_backend_omit_section_dynsym _bfd_sparc_elf_omit_section_dynsym
#define elf_backend_size_dynamic_sections \
_bfd_sparc_elf_size_dynamic_sections
#define elf_backend_relocate_section _bfd_sparc_elf_relocate_section
#define elf_backend_finish_dynamic_symbol \
_bfd_sparc_elf_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections \
_bfd_sparc_elf_finish_dynamic_sections
#define bfd_elf32_mkobject _bfd_sparc_elf_mkobject
#define elf_backend_object_p _bfd_sparc_elf_object_p
#define elf_backend_gc_mark_hook _bfd_sparc_elf_gc_mark_hook
#define elf_backend_gc_sweep_hook _bfd_sparc_elf_gc_sweep_hook
#define elf_backend_plt_sym_val _bfd_sparc_elf_plt_sym_val
#define elf_backend_init_index_section _bfd_elf_init_1_index_section
#define elf_backend_fixup_symbol _bfd_sparc_elf_fixup_symbol
#define elf_backend_can_gc_sections 1
#define elf_backend_can_refcount 1
#define elf_backend_want_got_plt 0
#define elf_backend_plt_readonly 0
#define elf_backend_want_plt_sym 1
#define elf_backend_got_header_size 4
#define elf_backend_want_dynrelro 1
#define elf_backend_rela_normal 1
#define elf_backend_add_symbol_hook elf32_sparc_add_symbol_hook
#define elf_backend_linux_prpsinfo32_ugid16 TRUE
#include "elf32-target.h"
/* Solaris 2. */
#undef TARGET_BIG_SYM
#define TARGET_BIG_SYM sparc_elf32_sol2_vec
#undef TARGET_BIG_NAME
#define TARGET_BIG_NAME "elf32-sparc-sol2"
#undef elf32_bed
#define elf32_bed elf32_sparc_sol2_bed
/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
boundary. */
#undef elf_backend_static_tls_alignment
#define elf_backend_static_tls_alignment 8
#undef elf_backend_strtab_flags
#define elf_backend_strtab_flags SHF_STRINGS
static bfd_boolean
elf32_sparc_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
bfd *obfd ATTRIBUTE_UNUSED,
const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
{
/* PR 19938: FIXME: Need to add code for setting the sh_info
and sh_link fields of Solaris specific section types. */
return FALSE;
}
#undef elf_backend_copy_special_section_fields
#define elf_backend_copy_special_section_fields elf32_sparc_copy_solaris_special_section_fields
#include "elf32-target.h"
/* A wrapper around _bfd_sparc_elf_link_hash_table_create that identifies
the target system as VxWorks. */
static struct bfd_link_hash_table *
elf32_sparc_vxworks_link_hash_table_create (bfd *abfd)
{
struct bfd_link_hash_table *ret;
ret = _bfd_sparc_elf_link_hash_table_create (abfd);
if (ret)
{
struct _bfd_sparc_elf_link_hash_table *htab;
htab = (struct _bfd_sparc_elf_link_hash_table *) ret;
htab->is_vxworks = 1;
}
return ret;
}
/* A final_write_processing hook that does both the SPARC- and VxWorks-
specific handling. */
static void
elf32_sparc_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
{
elf32_sparc_final_write_processing (abfd, linker);
elf_vxworks_final_write_processing (abfd, linker);
}
#undef TARGET_BIG_SYM
#define TARGET_BIG_SYM sparc_elf32_vxworks_vec
#undef TARGET_BIG_NAME
#define TARGET_BIG_NAME "elf32-sparc-vxworks"
#undef ELF_MINPAGESIZE
#define ELF_MINPAGESIZE 0x1000
#undef bfd_elf32_bfd_link_hash_table_create
#define bfd_elf32_bfd_link_hash_table_create \
elf32_sparc_vxworks_link_hash_table_create
#undef elf_backend_want_got_plt
#define elf_backend_want_got_plt 1
#undef elf_backend_plt_readonly
#define elf_backend_plt_readonly 1
#undef elf_backend_got_header_size
#define elf_backend_got_header_size 12
#undef elf_backend_dtrel_excludes_plt
#define elf_backend_dtrel_excludes_plt 1
#undef elf_backend_add_symbol_hook
#define elf_backend_add_symbol_hook \
elf_vxworks_add_symbol_hook
#undef elf_backend_link_output_symbol_hook
#define elf_backend_link_output_symbol_hook \
elf_vxworks_link_output_symbol_hook
#undef elf_backend_emit_relocs
#define elf_backend_emit_relocs \
elf_vxworks_emit_relocs
#undef elf_backend_final_write_processing
#define elf_backend_final_write_processing \
elf32_sparc_vxworks_final_write_processing
#undef elf_backend_static_tls_alignment
#undef elf_backend_strtab_flags
#undef elf_backend_copy_special_section_fields
#undef elf32_bed
#define elf32_bed sparc_elf_vxworks_bed
#include "elf32-target.h"
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