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[ARM] FDPIC: Add stack segment

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The size of the stack segment defaults to 32KB, and can be overridden
by defining the __stacksize symbol.

2018-04-25  Christophe Lyon  <christophe.lyon@st.com>
	Mickaël Guêné  <mickael.guene@st.com>

	bfd/
	* elf32-arm.c (DEFAULT_STACK_SIZE): New.
	(elf32_arm_always_size_sections): Create stack segment.
This commit is contained in:
Christophe Lyon
2018-03-20 10:55:37 +01:00
committed by Christophe Lyon
parent 5c5a4843ec
commit cb10292c2a
2 changed files with 19 additions and 0 deletions
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6
bfd/ChangeLog
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@ -1,3 +1,9 @@
2018-04-25 Christophe Lyon <christophe.lyon@st.com>
Mickaël Guêné <mickael.guene@st.com>
* elf32-arm.c (DEFAULT_STACK_SIZE): New.
(elf32_arm_always_size_sections): Create stack segment.
2018-04-25 Christophe Lyon <christophe.lyon@st.com> 2018-04-25 Christophe Lyon <christophe.lyon@st.com>
Mickaël Guêné <mickael.guene@st.com> Mickaël Guêné <mickael.guene@st.com>

13
bfd/elf32-arm.c
View File

@ -2251,6 +2251,9 @@ typedef unsigned short int insn16;
section. */ section. */
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
/* FDPIC default stack size. */
#define DEFAULT_STACK_SIZE 0x8000
static const unsigned long tls_trampoline [] = static const unsigned long tls_trampoline [] =
{ {
0xe08e0000, /* add r0, lr, r0 */ 0xe08e0000, /* add r0, lr, r0 */
@ -16485,6 +16488,7 @@ maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
/* Not an error, just cut short the traversal. */ /* Not an error, just cut short the traversal. */
return FALSE; return FALSE;
} }
return TRUE; return TRUE;
} }
@ -16955,6 +16959,9 @@ elf32_arm_always_size_sections (bfd *output_bfd,
struct bfd_link_info *info) struct bfd_link_info *info)
{ {
asection *tls_sec; asection *tls_sec;
struct elf32_arm_link_hash_table *htab;
htab = elf32_arm_hash_table (info);
if (bfd_link_relocatable (info)) if (bfd_link_relocatable (info))
return TRUE; return TRUE;
@ -16987,6 +16994,12 @@ elf32_arm_always_size_sections (bfd *output_bfd,
(*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
} }
} }
if (htab->fdpic_p && !bfd_link_relocatable (info)
&& !bfd_elf_stack_segment_size (output_bfd, info,
"__stacksize", DEFAULT_STACK_SIZE))
return FALSE;
return TRUE; return TRUE;
} }