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From 0c6a475b99dc06a49549d81059f290b23b86c62d Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Tue, 20 Nov 2012 05:57:53 +0000
Subject: [PATCH 12/27] Fix TLS LD to LE optimization for x32
PR gold/14858
* x86_64.cc (Relocate::tls_ld_to_le): Support x32.
---
gold/ChangeLog | 5 +++++
gold/x86_64.cc | 9 ++++++++-
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/gold/ChangeLog b/gold/ChangeLog
index 9a1a9d3..b31d11f 100644
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -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
diff --git a/gold/x86_64.cc b/gold/x86_64.cc
index b5b616f..8ddf4f2 100644
--- a/gold/x86_64.cc
+++ b/gold/x86_64.cc
@@ -3959,8 +3959,12 @@ 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);
@@ -3970,7 +3974,10 @@ Target_x86_64<size>::Relocate::tls_ld_to_le(
tls::check_tls(relinfo, relnum, rela.get_r_offset(), view[4] == 0xe8);
- memcpy(view - 3, "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0\0", 12);
+ 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.
--
1.7.9.5
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