GNU C Library master sources branch master updated. glibc-2.26.9000-1154-gc739e19

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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=c739e191d0697e29110d4eb446e537ff336324c6

commit c739e191d0697e29110d4eb446e537ff336324c6
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Mon Jan 22 11:13:31 2018 +0000

    aarch64: Revert the change of the __reserved member of mcontext_t
    
    The uc_mcontext.__reserved member of ucontext_t is a user visible API,
    that should not be changed, because this is the only way to access cpu
    states of various extensions of linux asm/sigcontext.h, it does not
    violate namespace rules either, so revert this part of the commit
    
    commit 4fa9b3bfe6759c82beb4b043a54a3598ca467289
    Commit:     Joseph Myers <joseph@codesourcery.com>
    
        Fix mcontext_t sigcontext namespace (bug 21457).
    
    (In principle the user can type cast &uc_mcontext to struct sigcontext*
    to use the linux sigcontext fields, but that's not the existing practice
    since mcontext_t used to be a typedef of struct sigcontext.)
    
    	[BZ #22742]
    	* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h (__glibc_reserved1):
    	Rename to __reserved and add comment.
    	* sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym (__glibc_reserved1):
    	Rename to __reserved.

diff --git a/ChangeLog b/ChangeLog
index 53a88a1..0f5f959 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2018-01-24  Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	[BZ #22742]
+	* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h (__glibc_reserved1):
+	Rename to __reserved and add comment.
+	* sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym (__glibc_reserved1):
+	Rename to __reserved.
+
 2018-01-24  Joseph Myers  <joseph@codesourcery.com>
 
 	* scripts/build-many-glibcs.py (Context.add_all_configs): Add
diff --git a/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h b/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h
index fe72fdd..f1b3ab5 100644
--- a/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h
+++ b/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h
@@ -56,7 +56,11 @@ typedef struct
     unsigned long long int __ctx(sp);
     unsigned long long int __ctx(pc);
     unsigned long long int __ctx(pstate);
-    unsigned char __glibc_reserved1[4096] __attribute__ ((__aligned__ (16)));
+    /* This field contains extension records for additional processor
+       state such as the FP/SIMD state.  It has to match the definition
+       of the corresponding field in the sigcontext struct, see the
+       arch/arm64/include/uapi/asm/sigcontext.h linux header for details.  */
+    unsigned char __reserved[4096] __attribute__ ((__aligned__ (16)));
   } mcontext_t;
 
 /* Userlevel context.  */
diff --git a/sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym b/sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym
index 479bdda..ab3930c 100644
--- a/sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym
+++ b/sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym
@@ -38,7 +38,7 @@ oX0				mcontext (regs)
 oSP				mcontext (sp)
 oPC				mcontext (pc)
 oPSTATE				mcontext (pstate)
-oEXTENSION                      mcontext (__glibc_reserved1)
+oEXTENSION                      mcontext (__reserved)
 
 #define fpsimd_context(member)  offsetof (struct fpsimd_context, member)
 

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

Summary of changes:
 ChangeLog                                      |    8 ++++++++
 sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h |    6 +++++-
 sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym |    2 +-
 3 files changed, 14 insertions(+), 2 deletions(-)


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