[ARM-FDPIC,07/12,ARM] FDPIC: Add stack segment

Message ID 20180322143850.1766-8-christophe.lyon@st.com
State New
Headers show
Series
  • FDPIC ABI for ARM
Related show

Commit Message

Christophe Lyon March 22, 2018, 2:38 p.m.
The size of the stack segment defaults to 32KB, and can be overridden
by defining the __stacksize symbol.

2018-XX-XX  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.
---
 bfd/elf32-arm.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

-- 
2.6.3

Patch

diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c
index 0e03c77..6ba4ee4 100644
--- a/bfd/elf32-arm.c
+++ b/bfd/elf32-arm.c
@@ -2251,6 +2251,9 @@  typedef unsigned short int insn16;
    section.  */
 #define ELF_DYNAMIC_INTERPRETER     "/usr/lib/ld.so.1"
 
+/* FDPIC default stack size.  */
+#define DEFAULT_STACK_SIZE 0x8000
+
 static const unsigned long tls_trampoline [] =
 {
   0xe08e0000,		/* add r0, lr, r0 */
@@ -16488,6 +16491,7 @@  maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
       /* Not an error, just cut short the traversal.  */
       return FALSE;
     }
+
   return TRUE;
 }
 
@@ -16958,6 +16962,9 @@  elf32_arm_always_size_sections (bfd *output_bfd,
 				struct bfd_link_info *info)
 {
   asection *tls_sec;
+  struct elf32_arm_link_hash_table *htab;
+
+  htab = elf32_arm_hash_table (info);
 
   if (bfd_link_relocatable (info))
     return TRUE;
@@ -16990,6 +16997,12 @@  elf32_arm_always_size_sections (bfd *output_bfd,
 	  (*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;
 }