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commit 9188b6818a3d1a6e6d89bf10fa4aea27a591494c
Author: Venkataramanan Kumar <venkataramanan.kumar@linaro.org>
Date: Wed Jan 1 17:47:14 2014 +0000
[AArch64] Pointer mangling support for AArch64.
diff --git glibc-2.17-c758a686/ports/sysdeps/aarch64/__longjmp.S glibc-2.17-c758a686/ports/sysdeps/aarch64/__longjmp.S
index 250f2af..2d38bbf 100644
--- glibc-2.17-c758a686/ports/sysdeps/aarch64/__longjmp.S
+++ glibc-2.17-c758a686/ports/sysdeps/aarch64/__longjmp.S
@@ -50,8 +50,12 @@ ENTRY (__longjmp)
ldp x23, x24, [x0, #JB_X23<<3]
ldp x25, x26, [x0, #JB_X25<<3]
ldp x27, x28, [x0, #JB_X27<<3]
+#ifdef PTR_DEMANGLE
+ ldp x29, x4, [x0, #JB_X29<<3]
+ PTR_DEMANGLE (x30, x4, x3, x2)
+#else
ldp x29, x30, [x0, #JB_X29<<3]
-
+#endif
ldp d8, d9, [x0, #JB_D8<<3]
ldp d10, d11, [x0, #JB_D10<<3]
ldp d12, d13, [x0, #JB_D12<<3]
@@ -87,8 +91,12 @@ ENTRY (__longjmp)
cfi_same_value(d13)
cfi_same_value(d14)
cfi_same_value(d15)
-
- ldr x5, [x0, #JB_SP<<3]
+#ifdef PTR_DEMANGLE
+ ldr x4, [x0, #JB_SP<<3]
+ PTR_DEMANGLE (x5, x4, x3, x2)
+#else
+ ldr x5, [x0, #JB_SP<<3]
+#endif
mov sp, x5
cmp x1, #0
mov x0, #1
diff --git glibc-2.17-c758a686/ports/sysdeps/aarch64/jmpbuf-offsets.h glibc-2.17-c758a686/ports/sysdeps/aarch64/jmpbuf-offsets.h
index 84c2ccc..bcf2afa 100644
--- glibc-2.17-c758a686/ports/sysdeps/aarch64/jmpbuf-offsets.h
+++ glibc-2.17-c758a686/ports/sysdeps/aarch64/jmpbuf-offsets.h
@@ -39,6 +39,22 @@
#define JB_D14 20
#define JB_D15 21
+#ifndef __ASSEMBLER__
+#include <setjmp.h>
+#include <stdint.h>
+#include <sysdep.h>
+
+static inline uintptr_t __attribute__ ((unused))
+_jmpbuf_sp (__jmp_buf jmpbuf)
+{
+ uintptr_t sp = jmpbuf[JB_SP];
+#ifdef PTR_DEMANGLE
+ PTR_DEMANGLE (sp);
+#endif
+ return sp;
+}
+#endif
+
/* Helper for generic ____longjmp_chk(). */
#define JB_FRAME_ADDRESS(buf) \
- ((void *) (buf[JB_SP]))
+ ((void *) _jmpbuf_sp (buf))
diff --git glibc-2.17-c758a686/ports/sysdeps/aarch64/jmpbuf-unwind.h glibc-2.17-c758a686/ports/sysdeps/aarch64/jmpbuf-unwind.h
index 22c6c2b..39a5dc2 100644
--- glibc-2.17-c758a686/ports/sysdeps/aarch64/jmpbuf-unwind.h
+++ glibc-2.17-c758a686/ports/sysdeps/aarch64/jmpbuf-unwind.h
@@ -29,16 +29,6 @@
#define _JMPBUF_CFA_UNWINDS_ADJ(jmpbuf, context, adj) \
_JMPBUF_UNWINDS_ADJ (jmpbuf, (void *) _Unwind_GetCFA (context), adj)
-static inline uintptr_t __attribute__ ((unused))
-_jmpbuf_sp (__jmp_buf jmpbuf)
-{
- uintptr_t sp = jmpbuf[JB_SP];
-#ifdef PTR_DEMANGLE
- PTR_DEMANGLE (sp);
-#endif
- return sp;
-}
-
#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
diff --git glibc-2.17-c758a686/ports/sysdeps/aarch64/setjmp.S glibc-2.17-c758a686/ports/sysdeps/aarch64/setjmp.S
index cb94e01..5822abd 100644
--- glibc-2.17-c758a686/ports/sysdeps/aarch64/setjmp.S
+++ glibc-2.17-c758a686/ports/sysdeps/aarch64/setjmp.S
@@ -39,13 +39,25 @@ ENTRY (__sigsetjmp)
stp x23, x24, [x0, #JB_X23<<3]
stp x25, x26, [x0, #JB_X25<<3]
stp x27, x28, [x0, #JB_X27<<3]
+
+#ifdef PTR_MANGLE
+ PTR_MANGLE (x4, x30, x3, x2)
+ stp x29, x4, [x0, #JB_X29<<3]
+#else
stp x29, x30, [x0, #JB_X29<<3]
+#endif
stp d8, d9, [x0, #JB_D8<<3]
stp d10, d11, [x0, #JB_D10<<3]
stp d12, d13, [x0, #JB_D12<<3]
stp d14, d15, [x0, #JB_D14<<3]
+#ifdef PTR_MANGLE
+ mov x4, sp
+ PTR_MANGLE (x5, x4, x3, x2)
+ str x5, [x0, #JB_SP<<3]
+#else
mov x2, sp
str x2, [x0, #JB_SP<<3]
+#endif
#if defined NOT_IN_libc && defined IS_IN_rtld
/* In ld.so we never save the signal mask */
mov w0, #0
diff --git glibc-2.17-c758a686/ports/sysdeps/aarch64/sysdep.h glibc-2.17-c758a686/ports/sysdeps/aarch64/sysdep.h
index 0dd597a..7169ba7 100644
--- glibc-2.17-c758a686/ports/sysdeps/aarch64/sysdep.h
+++ glibc-2.17-c758a686/ports/sysdeps/aarch64/sysdep.h
@@ -78,6 +78,17 @@
# define L(name) .L##name
#endif
+/* Load or store to/from a pc-relative EXPR into/from R, using T. */
+#define LDST_PCREL(OP, R, T, EXPR) \
+ adrp T, EXPR; \
+ OP R, [T, #:lo12:EXPR];\
+
+/* Load or store to/from a got-relative EXPR into/from R, using T. */
+#define LDST_GLOBAL(OP, R, T, EXPR) \
+ adrp T, :got:EXPR; \
+ ldr T, [T, #:got_lo12:EXPR];\
+ OP R, [T];
+
/* Since C identifiers are not normally prefixed with an underscore
on this system, the asm identifier `syscall_error' intrudes on the
C name space. Make sure we use an innocuous name. */
diff --git glibc-2.17-c758a686/ports/sysdeps/unix/sysv/linux/aarch64/sysdep.h glibc-2.17-c758a686/ports/sysdeps/unix/sysv/linux/aarch64/sysdep.h
index f3f0ada..5ccf1da 100644
--- glibc-2.17-c758a686/ports/sysdeps/unix/sysv/linux/aarch64/sysdep.h
+++ glibc-2.17-c758a686/ports/sysdeps/unix/sysv/linux/aarch64/sysdep.h
@@ -371,8 +371,44 @@ __local_syscall_error: \
#endif /* __ASSEMBLER__ */
-/* Pointer mangling is not yet supported for AArch64. */
-#define PTR_MANGLE(var) (void) (var)
-#define PTR_DEMANGLE(var) (void) (var)
+/* Pointer mangling is supported for AArch64. */
+#if (defined NOT_IN_libc && defined IS_IN_rtld) || \
+ (!defined SHARED && (!defined NOT_IN_libc || defined IS_IN_libpthread))
+# ifdef __ASSEMBLER__
+# define PTR_MANGLE(dst, src, guard, tmp) \
+ LDST_PCREL (ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard_local)); \
+ PTR_MANGLE2 (dst, src, guard)
+/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
+# define PTR_MANGLE2(dst, src, guard)\
+ eor dst, src, guard
+# define PTR_DEMANGLE(dst, src, guard, tmp)\
+ PTR_MANGLE (dst, src, guard, tmp)
+# define PTR_DEMANGLE2(dst, src, guard)\
+ PTR_MANGLE2 (dst, src, guard)
+# else
+extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
+# define PTR_MANGLE(var) \
+ (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
+# define PTR_DEMANGLE(var) PTR_MANGLE (var)
+# endif
+#else
+# ifdef __ASSEMBLER__
+# define PTR_MANGLE(dst, src, guard, tmp) \
+ LDST_GLOBAL (ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard)); \
+ PTR_MANGLE2 (dst, src, guard)
+/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
+# define PTR_MANGLE2(dst, src, guard)\
+ eor dst, src, guard
+# define PTR_DEMANGLE(dst, src, guard, tmp)\
+ PTR_MANGLE (dst, src, guard, tmp)
+# define PTR_DEMANGLE2(dst, src, guard)\
+ PTR_MANGLE2 (dst, src, guard)
+# else
+extern uintptr_t __pointer_chk_guard attribute_relro;
+# define PTR_MANGLE(var) \
+ (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
+# define PTR_DEMANGLE(var) PTR_MANGLE (var)
+# endif
+#endif
#endif /* linux/aarch64/sysdep.h */
commit 0b1f8e35640f5b3f7af11764ade3ff060211c309
Author: Carlos O'Donell <carlos@redhat.com>
Date: Mon Sep 23 01:44:38 2013 -0400
BZ #15754: Fix test case for ARM.
Statically built binaries use __pointer_chk_guard_local,
while dynamically built binaries use __pointer_chk_guard.
Provide the right definition depending on the test case
we are building.
diff --git glibc-2.17-c758a686/elf/Makefile glibc-2.17-c758a686/elf/Makefile
index cb8da93..27d249b 100644
--- glibc-2.17-c758a686/elf/Makefile
+++ glibc-2.17-c758a686/elf/Makefile
@@ -1019,6 +1019,9 @@ tst-stackguard1-ARGS = --command "$(host-test-program-cmd) --child"
tst-stackguard1-static-ARGS = --command "$(objpfx)tst-stackguard1-static --child"
tst-ptrguard1-ARGS = --command "$(host-built-program-cmd) --child"
+# When built statically, the pointer guard interface uses
+# __pointer_chk_guard_local.
+CFLAGS-tst-ptrguard1-static.c = -DPTRGUARD_LOCAL
tst-ptrguard1-static-ARGS = --command "$(objpfx)tst-ptrguard1-static --child"
$(objpfx)tst-leaks1: $(libdl)
diff --git glibc-2.17-c758a686/sysdeps/generic/stackguard-macros.h glibc-2.17-c758a686/sysdeps/generic/stackguard-macros.h
index 4fa3d96..b4a6b23 100644
--- glibc-2.17-c758a686/sysdeps/generic/stackguard-macros.h
+++ glibc-2.17-c758a686/sysdeps/generic/stackguard-macros.h
@@ -3,5 +3,10 @@
extern uintptr_t __stack_chk_guard;
#define STACK_CHK_GUARD __stack_chk_guard
+#ifdef PTRGUARD_LOCAL
extern uintptr_t __pointer_chk_guard_local;
-#define POINTER_CHK_GUARD __pointer_chk_guard_local
+# define POINTER_CHK_GUARD __pointer_chk_guard_local
+#else
+extern uintptr_t __pointer_chk_guard;
+# define POINTER_CHK_GUARD __pointer_chk_guard
+#endif