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| author | H.J. Lu <hjl.tools@gmail.com> | 2016-06-29 08:37:30 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2016-06-29 08:37:42 -0700 |
| commit | ad961eab9a010e79d17a4ea7e6bb977fe6dd86c2 (patch) | |
| tree | a4e66fa49c5f2abc3328cceae2ab73cbf470ad0b /gold/configure | |
| parent | 9bf74fb27dc6e2a9679403d66fe919215e3c2a45 (diff) | |
| download | binutils-gdb-ad961eab9a010e79d17a4ea7e6bb977fe6dd86c2.tar.gz | |
gold: Support x86-64 TLS code sequences without PLT
There are extensions to x86-64 psABI:
https://groups.google.com/forum/#!topic/x86-64-abi/de5_KnLHxtI
to call tls_get_addr via GOT:
call *__tls_get_addr@GOTPCREL(%rip)
Since direct call is 4-byte long and indirect call, is 5-byte long, the
extra one byte must be handled properly.
For general dynamic model, one 0x66 prefix before call instruction is
removed to make room for indirect call. For local dynamic model, we
simply use 5-byte indirect call.
TLS linker optimization is updated to recognize new instruction
patterns. For local dynamic model to local exec model transition, we
generate 4 0x66 prefixes, instead of 3, before mov instruction in 64-bit
and generate a 5-byte nop, instead of 4-byte, before mov instruction in
32-bit.
PR gold/20216
* configure.ac (DEFAULT_TARGET_X86_64_OR_X32): New
AM_CONDITIONAL.
* configure: Regenerated.
* x86_64.cc (Target_x86_64<size>::Relocate::relocate): Allow
R_X86_64_GOTPCRELX relocation against __tls_get_addr.
(Target_x86_64<size>::Relocate::tls_gd_to_ie): Support indirect
call to __tls_get_addr.
(Target_x86_64<size>::Relocate::tls_gd_to_le): Likewise.
(Target_x86_64<size>::Relocate::tls_ld_to_le): Likewise.
* testsuite/Makefile.am (check_PROGRAMS): Add pr20216a_test,
pr20216b_test, pr20216c_test, pr20216d_test, pr20216e_test.
(pr20216a_test_SOURCES): New.
(pr20216a_test_DEPENDENCIES): Likewise.
(pr20216a_test_CFLAGS): Likewise.
(pr20216a_test_LDFLAGS): Likewise.
(pr20216a_test_LDADD): Likewise.
(pr20216b_test_SOURCES): Likewise.
(pr20216b_test_DEPENDENCIES): Likewise.
(pr20216b_test_CFLAGS): Likewise.
(pr20216b_test_LDFLAGS): Likewise.
(pr20216b_test_LDADD): Likewise.
(pr20216c_test_SOURCES): Likewise.
(pr20216c_test_DEPENDENCIES): Likewise.
(pr20216c_test_CFLAGS): Likewise.
(pr20216c_test_LDFLAGS): Likewise.
(pr20216c_test_LDADD): Likewise.
(pr20216d_test_SOURCES): Likewise.
(pr20216d_test_DEPENDENCIES): Likewise.
(pr20216d_test_CFLAGS): Likewise.
(pr20216d_test_LDFLAGS): Likewise.
(pr20216d_test_LDADD): Likewise.
(pr20216e_test_SOURCES): Likewise.
(pr20216e_test_DEPENDENCIES): Likewise.
(pr20216e_test_CFLAGS): Likewise.
(pr20216e_test_LDFLAGS): Likewise.
(pr20216e_test_LDADD): Likewise.
(pr20216a.so): Likewise.
(pr20216b.so): Likewise.
(pr20216_gd.o): Likewise.
(pr20216_ld.o): Likewise.
(MOSTLYCLEANFILES): Add pr20216a.so pr20216b.so.
* testsuite/Makefile.in: Regenerated.
* testsuite/pr20216_def.c: New file.
* testsuite/pr20216_gd.S: Likewise.
* testsuite/pr20216_ld.S: Likewise.
* testsuite/pr20216_main.c: Likewise.
Diffstat (limited to 'gold/configure')
| -rwxr-xr-x | gold/configure | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gold/configure b/gold/configure index a40b2b542e1..8240c28a91e 100755 --- a/gold/configure +++ b/gold/configure @@ -690,6 +690,8 @@ DEFAULT_TARGET_MIPS_FALSE DEFAULT_TARGET_MIPS_TRUE DEFAULT_TARGET_TILEGX_FALSE DEFAULT_TARGET_TILEGX_TRUE +DEFAULT_TARGET_X86_64_OR_X32_FALSE +DEFAULT_TARGET_X86_64_OR_X32_TRUE DEFAULT_TARGET_X32_FALSE DEFAULT_TARGET_X32_TRUE DEFAULT_TARGET_X86_64_FALSE @@ -3539,6 +3541,14 @@ else DEFAULT_TARGET_X32_FALSE= fi + if test "$target_x86_64" = "yes" -o "$target_x32" = "yes"; then + DEFAULT_TARGET_X86_64_OR_X32_TRUE= + DEFAULT_TARGET_X86_64_OR_X32_FALSE='#' +else + DEFAULT_TARGET_X86_64_OR_X32_TRUE='#' + DEFAULT_TARGET_X86_64_OR_X32_FALSE= +fi + if test "$targ_obj" = "tilegx"; then DEFAULT_TARGET_TILEGX_TRUE= DEFAULT_TARGET_TILEGX_FALSE='#' @@ -7837,6 +7847,10 @@ if test -z "${DEFAULT_TARGET_X32_TRUE}" && test -z "${DEFAULT_TARGET_X32_FALSE}" as_fn_error "conditional \"DEFAULT_TARGET_X32\" was never defined. Usually this means the macro was only invoked conditionally." "$LINENO" 5 fi +if test -z "${DEFAULT_TARGET_X86_64_OR_X32_TRUE}" && test -z "${DEFAULT_TARGET_X86_64_OR_X32_FALSE}"; then + as_fn_error "conditional \"DEFAULT_TARGET_X86_64_OR_X32\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi if test -z "${DEFAULT_TARGET_TILEGX_TRUE}" && test -z "${DEFAULT_TARGET_TILEGX_FALSE}"; then as_fn_error "conditional \"DEFAULT_TARGET_TILEGX\" was never defined. Usually this means the macro was only invoked conditionally." "$LINENO" 5 |