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authorWill Newton <will.newton@linaro.org>2013-08-07 13:55:30 +0100
committerWill Newton <will.newton@linaro.org>2013-10-03 11:35:50 +0100
commitb7f2d27dbd85f6a0966dc389ad4f8205085b7ae8 (patch)
tree5d08889f9d642580e01d529303ed56409982a221 /ports/ChangeLog.arm
parent29c793b3c2947badd9d05e45736e406fb12021e8 (diff)
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ARM: Add pointer encryption support.
Add support for pointer encryption in glibc internal structures in C
and assembler code. Pointer encryption is a glibc security feature
described here:

https://sourceware.org/glibc/wiki/PointerEncryption

The ARM implementation uses global variables instead of thread pointer
relative accesses to get the value of the pointer encryption guard
because accessing the thread pointer can be very expensive on older
ARM cores.

ports/ChangeLog.arm:

2013-10-03  Will Newton  <will.newton@linaro.org>

	* sysdeps/arm/__longjmp.S (__longjmp): Demangle fp, sp
	and lr when restoring register values.
	* sysdeps/arm/include/bits/setjmp.h (JMP_BUF_REGLIST): Remove
	sp and lr from list and replace fp with a4.
	* sysdeps/arm/jmpbuf-unwind.h (_jmpbuf_sp): New function.
	(_JMPBUF_UNWINDS_ADJ): Call _jmpbuf_sp.
	* sysdeps/arm/setjmp.S (__sigsetjmp): Mangle fp, sp and lr
	before storing register values.
	* sysdeps/arm/sysdep.h (LDST_GLOBAL): New macro.
	* sysdeps/unix/sysv/linux/arm/sysdep.h (PTR_MANGLE): New macro.
	(PTR_DEMANGLE): Likewise. (PTR_MANGLE2): Likewise.
	(PTR_DEMANGLE2): Likewise.
Diffstat (limited to 'ports/ChangeLog.arm')
-rw-r--r--ports/ChangeLog.arm15
1 files changed, 15 insertions, 0 deletions
diff --git a/ports/ChangeLog.arm b/ports/ChangeLog.arm
index a84c7d211c..0724dbd9a0 100644
--- a/ports/ChangeLog.arm
+++ b/ports/ChangeLog.arm
@@ -1,3 +1,18 @@
+2013-10-03  Will Newton  <will.newton@linaro.org>
+
+	* sysdeps/arm/__longjmp.S (__longjmp): Demangle fp, sp
+	and lr when restoring register values.
+	* sysdeps/arm/include/bits/setjmp.h (JMP_BUF_REGLIST): Remove
+	sp and lr from list and replace fp with a4.
+	* sysdeps/arm/jmpbuf-unwind.h (_jmpbuf_sp): New function.
+	(_JMPBUF_UNWINDS_ADJ): Call _jmpbuf_sp.
+	* sysdeps/arm/setjmp.S (__sigsetjmp): Mangle fp, sp and lr
+	before storing register values.
+	* sysdeps/arm/sysdep.h (LDST_GLOBAL): New macro.
+	* sysdeps/unix/sysv/linux/arm/sysdep.h (PTR_MANGLE): New macro.
+	(PTR_DEMANGLE): Likewise. (PTR_MANGLE2): Likewise.
+	(PTR_DEMANGLE2): Likewise.
+
 2013-09-24  Will Newton  <will.newton@linaro.org>
 
 	* ports/sysdeps/arm/nptl/tls.h (TLS_INIT_TP_EXPENSIVE): Remove