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ARM: Fix clone code when built for Thumb.

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The mov lr, pc instruction will lose the Thumb bit from the return address
so use blx lr instead.

ports/ChangeLog.arm:

2013-08-30  Will Newton  <will.newton@linaro.org>

	[BZ #15909]
	* sysdeps/unix/sysv/linux/arm/clone.S (__clone): Use blx
	instead of mov lr, pc.
This commit is contained in:
Will Newton 2013-08-29 20:10:26 +01:00
parent 2601bc1860
commit 6b06ac56cd
3 changed files with 9 additions and 3 deletions
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2
NEWS
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@ -10,7 +10,7 @@ Version 2.19
* The following bugs are resolved with this release:
14699, 15522, 15531, 15532, 15736, 15749, 15797, 15867, 15890, 15897,
15905.
15905, 15909.
* CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
to the d_name member of struct dirent, or omit the terminating NUL

6
ports/ChangeLog.arm
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@ -1,3 +1,9 @@
2013-08-30 Will Newton <will.newton@linaro.org>
[BZ #15909]
* sysdeps/unix/sysv/linux/arm/clone.S (__clone): Use blx
instead of mov lr, pc.
2013-08-30 Will Newton <will.newton@linaro.org>
* sysdeps/arm/armv6t2/strlen.S: New file.

4
ports/sysdeps/unix/sysv/linux/arm/clone.S
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@ -93,8 +93,8 @@ PSEUDO_END (__clone)
mov lr, pc
bx ip
#else
mov lr, pc
ldr pc, [sp], #8
ldr lr, [sp], #8
blx lr
#endif
@ and we are done, passing the return value through r0