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* elf-bfd.h (struct elf_backend_data): Add default_execstack.

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* elflink.c (bfd_elf_size_dynamic_sections): Heed default_execstack.
	* elfxx-target.h (elf_backend_default_execstack): Define to 1.
	(elfNN_bed): Init new field.
	* elf64-ppc.c (elf_backend_default_execstack): Define to 0.
This commit is contained in:
Alan Modra
2007-02-19 12:44:18 +00:00
parent c88471452a
commit 6bfdb61b0c
5 changed files with 27 additions and 7 deletions
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8
bfd/ChangeLog
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@@ -1,3 +1,11 @@
2007-02-19 Alan Modra <amodra@bigpond.net.au>
* elf-bfd.h (struct elf_backend_data): Add default_execstack.
* elflink.c (bfd_elf_size_dynamic_sections): Heed default_execstack.
* elfxx-target.h (elf_backend_default_execstack): Define to 1.
(elfNN_bed): Init new field.
* elf64-ppc.c (elf_backend_default_execstack): Define to 0.
2007-02-17 Mark Mitchell <mark@codesourcery.com> 2007-02-17 Mark Mitchell <mark@codesourcery.com>
Nathan Sidwell <nathan@codesourcery.com> Nathan Sidwell <nathan@codesourcery.com>
Vladimir Prus <vladimir@codesourcery.com Vladimir Prus <vladimir@codesourcery.com

13
bfd/elf-bfd.h
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@@ -1106,10 +1106,17 @@ struct elf_backend_data
unsigned can_refcount : 1; unsigned can_refcount : 1;
unsigned want_got_sym : 1; unsigned want_got_sym : 1;
unsigned want_dynbss : 1; unsigned want_dynbss : 1;
/* Targets which do not support physical addressing often require
that the p_paddr field in the section header to be set to zero. /* Targets which do not support physical addressing often require
This field indicates whether this behavior is required. */ that the p_paddr field in the section header to be set to zero.
This field indicates whether this behavior is required. */
unsigned want_p_paddr_set_to_zero : 1; unsigned want_p_paddr_set_to_zero : 1;
/* True if an object file lacking a .note.GNU-stack section
should be assumed to be requesting exec stack. At least one
other file in the link needs to have a .note.GNU-stack section
for a PT_GNU_STACK segment to be created. */
unsigned default_execstack : 1;
}; };
/* Information stored for each BFD section in an ELF file. This /* Information stored for each BFD section in an ELF file. This

3
bfd/elf64-ppc.c
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@@ -73,6 +73,7 @@ static bfd_vma opd_entry_value
#define elf_backend_can_gc_sections 1 #define elf_backend_can_gc_sections 1
#define elf_backend_can_refcount 1 #define elf_backend_can_refcount 1
#define elf_backend_rela_normal 1 #define elf_backend_rela_normal 1
#define elf_backend_default_execstack 0
#define bfd_elf64_mkobject ppc64_elf_mkobject #define bfd_elf64_mkobject ppc64_elf_mkobject
#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
@@ -1197,7 +1198,7 @@ static reloc_howto_type ppc64_elf_howto_raw[] = {
/* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */ /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
/* FIXME: R_PPC64_PLTGOT16_DS not implemented. */ /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
HOWTO (R_PPC64_PLTGOT16_DS, /* type */ HOWTO (R_PPC64_PLTGOT16_DS, /* type */
0, /* rightshift */ 0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */ 1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */ 16, /* bitsize */

4
bfd/elflink.c
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@@ -5237,6 +5237,7 @@ bfd_elf_size_dynamic_sections (bfd *output_bfd,
if (!is_elf_hash_table (info->hash)) if (!is_elf_hash_table (info->hash))
return TRUE; return TRUE;
bed = get_elf_backend_data (output_bfd);
elf_tdata (output_bfd)->relro = info->relro; elf_tdata (output_bfd)->relro = info->relro;
if (info->execstack) if (info->execstack)
elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X; elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
@@ -5263,7 +5264,7 @@ bfd_elf_size_dynamic_sections (bfd *output_bfd,
exec = PF_X; exec = PF_X;
notesec = s; notesec = s;
} }
else else if (bed->default_execstack)
exec = PF_X; exec = PF_X;
} }
if (notesec) if (notesec)
@@ -5284,7 +5285,6 @@ bfd_elf_size_dynamic_sections (bfd *output_bfd,
/* The backend may have to create some sections regardless of whether /* The backend may have to create some sections regardless of whether
we're dynamic or not. */ we're dynamic or not. */
bed = get_elf_backend_data (output_bfd);
if (bed->elf_backend_always_size_sections if (bed->elf_backend_always_size_sections
&& ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) && ! (*bed->elf_backend_always_size_sections) (output_bfd, info))
return FALSE; return FALSE;

6
bfd/elfxx-target.h
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@@ -103,6 +103,9 @@
#ifndef elf_backend_want_p_paddr_set_to_zero #ifndef elf_backend_want_p_paddr_set_to_zero
#define elf_backend_want_p_paddr_set_to_zero 0 #define elf_backend_want_p_paddr_set_to_zero 0
#endif #endif
#ifndef elf_backend_default_execstack
#define elf_backend_default_execstack 1
#endif
#define bfd_elfNN_bfd_debug_info_start bfd_void #define bfd_elfNN_bfd_debug_info_start bfd_void
#define bfd_elfNN_bfd_debug_info_end bfd_void #define bfd_elfNN_bfd_debug_info_end bfd_void
@@ -683,7 +686,8 @@ static struct elf_backend_data elfNN_bed =
elf_backend_can_refcount, elf_backend_can_refcount,
elf_backend_want_got_sym, elf_backend_want_got_sym,
elf_backend_want_dynbss, elf_backend_want_dynbss,
elf_backend_want_p_paddr_set_to_zero elf_backend_want_p_paddr_set_to_zero,
elf_backend_default_execstack
}; };
/* Forward declaration for use when initialising alternative_target field. */ /* Forward declaration for use when initialising alternative_target field. */