GNU C Library master sources branch master updated. glibc-2.23-45-gec21534

[hjl at sourceware dot org]

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- Log -----------------------------------------------------------------
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=ec215346b92fdaef5d8042b5545e16beb7ccc7d1

commit ec215346b92fdaef5d8042b5545e16beb7ccc7d1
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Tue Mar 1 16:58:07 2016 -0800

    Call x86-64 __mcount_internal/__sigjmp_save directly
    
    Since __mcount_internal and __sigjmp_save are internal to x86-64 libc.so:
    
    3532: 0000000000104530   289 FUNC    LOCAL  DEFAULT   13 __mcount_internal
    3391: 0000000000034170    38 FUNC    LOCAL  DEFAULT   13 __sigjmp_save
    
    they can be called directly without PLT.
    
    	* sysdeps/x86_64/_mcount.S (C_LABEL(_mcount)): Call
    	__mcount_internal directly.
    	(C_LABEL(__fentry__)): Likewise.
    	* sysdeps/x86_64/setjmp.S __sigsetjmp): Call __sigjmp_save
    	directly.

diff --git a/ChangeLog b/ChangeLog
index 2808645..787fef1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,13 @@
 2016-03-01  H.J. Lu  <hongjiu.lu@intel.com>
 
+	* sysdeps/x86_64/_mcount.S (C_LABEL(_mcount)): Call
+	__mcount_internal directly.
+	(C_LABEL(__fentry__)): Likewise.
+	* sysdeps/x86_64/setjmp.S __sigsetjmp): Call __sigjmp_save
+	directly.
+
+2016-03-01  H.J. Lu  <hongjiu.lu@intel.com>
+
 	* sysdeps/unix/sysv/linux/x86_64/__start_context.S
 	(__start_context): Call __setcontext directly.
 
diff --git a/sysdeps/x86_64/_mcount.S b/sysdeps/x86_64/_mcount.S
index 5d7edd2..ba13643 100644
--- a/sysdeps/x86_64/_mcount.S
+++ b/sysdeps/x86_64/_mcount.S
@@ -43,11 +43,7 @@ C_LABEL(_mcount)
 	movq	56(%rsp),%rsi
 	/* Get frompc via the frame pointer.  */
 	movq	8(%rbp),%rdi
-#ifdef PIC
-	call C_SYMBOL_NAME(__mcount_internal)@PLT
-#else
 	call C_SYMBOL_NAME(__mcount_internal)
-#endif
 	/* Pop the saved registers.  Please note that `mcount' has no
 	   return value.  */
 	movq	48(%rsp),%r9
@@ -84,11 +80,7 @@ C_LABEL(__fentry__)
 	movq	64(%rsp),%rsi
 	/* caller is the return address above it */
 	movq	72(%rsp),%rdi
-#ifdef PIC
-	call C_SYMBOL_NAME(__mcount_internal)@PLT
-#else
 	call C_SYMBOL_NAME(__mcount_internal)
-#endif
 	/* Pop the saved registers.  Please note that `__fentry__' has no
 	   return value.  */
 	movq	48(%rsp),%r9
diff --git a/sysdeps/x86_64/setjmp.S b/sysdeps/x86_64/setjmp.S
index 3e93967..e37c223 100644
--- a/sysdeps/x86_64/setjmp.S
+++ b/sysdeps/x86_64/setjmp.S
@@ -60,11 +60,7 @@ ENTRY (__sigsetjmp)
 	retq
 #else
 	/* Make a tail call to __sigjmp_save; it takes the same args.  */
-# ifdef	PIC
-	jmp C_SYMBOL_NAME (__sigjmp_save)@PLT
-# else
 	jmp __sigjmp_save
-# endif
 #endif
 END (__sigsetjmp)
 hidden_def (__sigsetjmp)

http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=521266a819be5b33b224f2e8358175c30c79f1c2

commit 521266a819be5b33b224f2e8358175c30c79f1c2
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Tue Mar 1 16:55:36 2016 -0800

    Call x86-64 __setcontext directly
    
    Since x86-64 __start_context calls the internal __setcontext:
    
    5089: 00000000000417e0   145 FUNC    LOCAL  DEFAULT   13 __setcontext
    
    it should call __setcontext directly.
    
    	* sysdeps/unix/sysv/linux/x86_64/__start_context.S
    	(__start_context): Call __setcontext directly.

diff --git a/ChangeLog b/ChangeLog
index 9dabeca..2808645 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2016-03-01  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* sysdeps/unix/sysv/linux/x86_64/__start_context.S
+	(__start_context): Call __setcontext directly.
+
 2016-02-26  Joseph Myers  <joseph@codesourcery.com>
 
 	* sysdeps/unix/sysv/linux/alpha/kernel-features.h
diff --git a/sysdeps/unix/sysv/linux/x86_64/__start_context.S b/sysdeps/unix/sysv/linux/x86_64/__start_context.S
index 408d30d..6a33cd0 100644
--- a/sysdeps/unix/sysv/linux/x86_64/__start_context.S
+++ b/sysdeps/unix/sysv/linux/x86_64/__start_context.S
@@ -36,7 +36,7 @@ ENTRY(__start_context)
 	testq	%rdi, %rdi
 	je	2f			/* If it is zero exit.  */
 
-	call	JUMPTARGET(__setcontext)
+	call	__setcontext
 	/* If this returns (which can happen if the syscall fails) we'll
 	   exit the program with the return error value (-1).  */
 	movq	%rax,%rdi

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                                        |   13 +++++++++++++
 sysdeps/unix/sysv/linux/x86_64/__start_context.S |    2 +-
 sysdeps/x86_64/_mcount.S                         |    8 --------
 sysdeps/x86_64/setjmp.S                          |    4 ----
 4 files changed, 14 insertions(+), 13 deletions(-)


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