[AArch64] BZ #16169 Add CFI directives to clone.S

[BZ #16169] Add CFI directives to the AArch64 clone.S implementation
and ensure that the FP in the child is zero'd in order to comply with
AAPCS.

diff --git a/NEWS b/NEWS
index da86ee502ebdbe2c1d7ce2e768674f9e3b1a7fc3..87ab0485fd1381af74e0a50703df55581af1ec36 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -22,10 +22,10 @@ Version 2.19
   15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15985, 15988,
   15997, 16032, 16034, 16036, 16037, 16038, 16041, 16055, 16071, 16072,
   16074, 16077, 16078, 16103, 16112, 16133, 16143, 16144, 16146, 16150,
-  16151, 16153, 16167, 16172, 16195, 16214, 16245, 16271, 16274, 16283,
-  16289, 16293, 16314, 16316, 16330, 16337, 16338, 16356, 16365, 16366,
-  16369, 16372, 16375, 16379, 16384, 16385, 16386, 16387, 16390, 16394,
-  16400, 16407, 16408, 16414, 16430, 16453.
+  16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245, 16271, 16274,
+  16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338, 16356, 16365,
+  16366, 16369, 16372, 16375, 16379, 16384, 16385, 16386, 16387, 16390,
+  16394, 16400, 16407, 16408, 16414, 16430, 16453.
 
 * Slovenian translations for glibc messages have been contributed by the
   Translation Project's Slovenian team of translators.

diff --git a/ports/ChangeLog.aarch64 b/ports/ChangeLog.aarch64
index 19d8fe13a0117ce854701877aec36fc478c5a95f..f11a086536900cf3ab007e0bd3ea9df71eec6b76 100644 (file)
--- a/ports/ChangeLog.aarch64
+++ b/ports/ChangeLog.aarch64
@@ -1,3 +1,9 @@
+2014-01-20  Tom Tromey  <tromey@redhat.com>
+
+       [BZ #16169]
+       * sysdeps/unix/sysv/linux/aarch64/clone.S (__clone): Add CFI
+       directives;  Zero x29.
+
 2014-01-20  Marcus Shawcroft  <marcus.shawcroft@linaro.org>
 
        * sysdeps/aarch64/configure.ac: New file.

diff --git a/ports/sysdeps/unix/sysv/linux/aarch64/clone.S b/ports/sysdeps/unix/sysv/linux/aarch64/clone.S
index 2ca8021064049bab487239458062f6bde05123de..f2964f48716c3bfbc428b9c69b65e2568edff40b 100644 (file)
--- a/ports/sysdeps/unix/sysv/linux/aarch64/clone.S
+++ b/ports/sysdeps/unix/sysv/linux/aarch64/clone.S
@@ -63,6 +63,7 @@ ENTRY(__clone)
        mov     x8, #SYS_ify(clone)
        /* X0:flags, x1:newsp, x2:parenttidptr, x3:newtls, x4:childtid.  */
        svc     0x0
+       cfi_endproc
        cmp     x0, #0
        beq     2f
        blt     3f
@@ -72,6 +73,9 @@ ENTRY(__clone)
        b       syscall_error
 
 2:
+       cfi_startproc
+       cfi_undefined (x30)
+       mov     x29, 0
 #ifdef RESET_PID
        tbnz    x5, #CLONE_THREAD_BIT, 3f
        mov     x0, #-1
@@ -93,7 +97,8 @@ ENTRY(__clone)
 
        /* We are done, pass the return value through x0.  */
        b       HIDDEN_JUMPTARGET(_exit)
-
+       cfi_endproc
+       cfi_startproc
 PSEUDO_END (__clone)
 
 weak_alias (__clone, clone)