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authorTom Tromey <tromey@redhat.com>2014-01-20 12:58:03 +0000
committerMarcus Shawcroft <marcus.shawcroft@linaro.org>2014-01-20 15:44:05 +0000
commit3a3acb6afc753475675b5724f206e619d0c9590d (patch)
tree17c565f3ad7d09d9890e42495ab3fc9cf20229b9 /ports
parentb67e7fe0f9f9b0f6c4386a0eccba83178098438c (diff)
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[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.
Diffstat (limited to 'ports')
-rw-r--r--ports/ChangeLog.aarch646
-rw-r--r--ports/sysdeps/unix/sysv/linux/aarch64/clone.S7
2 files changed, 12 insertions, 1 deletions
diff --git a/ports/ChangeLog.aarch64 b/ports/ChangeLog.aarch64
index 19d8fe13a0..f11a086536 100644
--- 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 2ca8021064..f2964f4871 100644
--- 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)