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ac187dc4ab
glibc/sysdeps
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H.J. Lu ac187dc4ab Always indirect branch to __libc_start_main via GOT 
Since __libc_start_main in libc.so is called very early, lazy binding
isn't relevant.  Always call __libc_start_main with indirect branch via
GOT to avoid extra branch to PLT slot.  In case of static executable,
ld in binutils 2.26 or above can convert indirect branch into direct
branch:

0000000000400a80 <_start>:
  400a80:       31 ed                   xor    %ebp,%ebp
  400a82:       49 89 d1                mov    %rdx,%r9
  400a85:       5e                      pop    %rsi
  400a86:       48 89 e2                mov    %rsp,%rdx
  400a89:       48 83 e4 f0             and    $0xfffffffffffffff0,%rsp
  400a8d:       50                      push   %rax
  400a8e:       54                      push   %rsp
  400a8f:       49 c7 c0 20 1b 40 00    mov    $0x401b20,%r8
  400a96:       48 c7 c1 90 1a 40 00    mov    $0x401a90,%rcx
  400a9d:       48 c7 c7 c0 03 40 00    mov    $0x4003c0,%rdi
  400aa4:       67 e8 96 09 00 00       addr32 callq 401440 <__libc_start_main>
  400aaa:       f4                      hlt

	* sysdeps/x86_64/start.S (_start): Always indirect branch to
	__libc_start_main via GOT.
2016-06-09 04:43:31 -07:00
..
aarch64 This is an optimized memset for AArch64. Memset is split into 4 main cases: 2016-05-12 16:44:53 +01:00
alpha Update Alpha libm-test-ulps 2016-01-25 10:43:41 -08:00
arm Bug 20198: quick_exit should not call destructors. 2016-06-06 21:40:25 -04:00
generic Fix crash on getauxval call without HAVE_AUX_VECTOR 2016-04-10 23:58:43 +02:00
gnu Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
hppa hppa: fix dladdr [BZ #19415] 2016-01-08 02:19:26 -05:00
i386 Fix i386/x86_64 log1pl (sNaN) (bug 20229). 2016-06-08 23:11:42 +00:00
ia64 Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ieee754 Fix dbl-64 asin (sNaN) (bug 20213). 2016-06-06 22:21:11 +00:00
init_array Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
m68k m68k: use large PIC model for gcrt1.o 2016-04-30 18:51:43 +02:00
mach hurd: disable ifunc for now 2016-05-30 22:13:47 +02:00
microblaze Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
mips Fix MIPS64 memcpy regression. 2016-01-28 01:52:05 +00:00
nacl Fix build with HAVE_AUX_VECTOR 2016-04-11 10:27:25 +02:00
nios2 Maintainence patch for nios2: update ULPS file and localplt.data changes. 2016-01-21 22:58:03 -08:00
nptl Increase fork signal safety for single-threaded processes [BZ #19703] 2016-05-12 15:26:55 +02:00
posix getaddrinfo: Convert from extend_alloca to struct scratch_buffer 2016-05-12 14:07:56 +02:00
powerpc powerpc: Fix --disable-multi-arch build on POWER8 2016-06-06 16:03:29 -03:00
pthread Revert "aio: fix newp->running data race" 2016-05-04 15:52:30 +02:00
s390 S390: Fix utf32 to utf16 handling of low surrogates (disable cu42). 2016-05-25 17:18:06 +02:00
sh Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sparc Add _STRING_INLINE_unaligned and string_private.h 2016-02-18 14:55:29 -02:00
tile Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
unix Bug 20214: Fix linux/in6.h and netinet/in.h sync. 2016-06-07 04:46:37 -04:00
wordsize-32 Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
wordsize-64 Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
x86 Check FMA after COMMON_CPUID_INDEX_80000001 2016-06-07 08:00:40 -07:00
x86_64 Always indirect branch to __libc_start_main via GOT 2016-06-09 04:43:31 -07:00