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