darkkirb/old-cross-binutils
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Fix TLS to LE optimization for x32

Browse source 
PR gold/14858
	* x86_64.cc (Relocate::tls_ld_to_le): Support x32.
This commit is contained in:
H.J. Lu 2012-11-20 05:56:06 +00:00
parent de9f1b683d
commit d2cf1c6cfc
2 changed files with 13 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
gold/ChangeLog
View file

@ -1,3 +1,8 @@
2012-11-19 H.J. Lu <hongjiu.lu@intel.com>
PR gold/14858
* x86_64.cc (Relocate::tls_ld_to_le): Support x32.
2012-11-14 Roland McGrath <mcgrathr@google.com>
* arm.cc (Output_data_plt_arm_nacl::first_plt_entry): Use bic rather

7
gold/x86_64.cc
View file

@ -3965,8 +3965,12 @@ Target_x86_64<size>::Relocate::tls_ld_to_le(
section_size_type view_size)
{
// leaq foo@tlsld(%rip),%rdi; call __tls_get_addr@plt;
// For SIZE == 64:
// ... leq foo@dtpoff(%rax),%reg
// ==> .word 0x6666; .byte 0x66; movq %fs:0,%rax ... leaq x@tpoff(%rax),%rdx
// For SIZE == 32:
// ... leq foo@dtpoff(%rax),%reg
// ==> nopl 0x0(%rax); movl %fs:0,%eax ... leaq x@tpoff(%rax),%rdx
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, -3);
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 9);
@ -3976,7 +3980,10 @@ Target_x86_64<size>::Relocate::tls_ld_to_le(
tls::check_tls(relinfo, relnum, rela.get_r_offset(), view[4] == 0xe8);
if (size == 64)
memcpy(view - 3, "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0\0", 12);
else
memcpy(view - 3, "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0\0", 12);
// The next reloc should be a PLT32 reloc against __tls_get_addr.
// We can skip it.