[IA64] Fix 2.6 kernel for the new ia64 assembler
The new ia64 assembler uses slot 1 for the offset of a long (2-slot)
instruction and the old assembler uses slot 2. The 2.6 kernel assumes
slot 2 and won't boot when the new assembler is used:
http://sources.redhat.com/bugzilla/show_bug.cgi?id=1433
This patch will work with either slot 1 or 2.
Patch provided by H.J. Lu
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/kernel/patch.c b/arch/ia64/kernel/patch.c
index 367804a..6a4ac7d 100644
--- a/arch/ia64/kernel/patch.c
+++ b/arch/ia64/kernel/patch.c
@@ -64,22 +64,30 @@
void
ia64_patch_imm64 (u64 insn_addr, u64 val)
{
- ia64_patch(insn_addr,
+ /* The assembler may generate offset pointing to either slot 1
+ or slot 2 for a long (2-slot) instruction, occupying slots 1
+ and 2. */
+ insn_addr &= -16UL;
+ ia64_patch(insn_addr + 2,
0x01fffefe000UL, ( ((val & 0x8000000000000000UL) >> 27) /* bit 63 -> 36 */
| ((val & 0x0000000000200000UL) << 0) /* bit 21 -> 21 */
| ((val & 0x00000000001f0000UL) << 6) /* bit 16 -> 22 */
| ((val & 0x000000000000ff80UL) << 20) /* bit 7 -> 27 */
| ((val & 0x000000000000007fUL) << 13) /* bit 0 -> 13 */));
- ia64_patch(insn_addr - 1, 0x1ffffffffffUL, val >> 22);
+ ia64_patch(insn_addr + 1, 0x1ffffffffffUL, val >> 22);
}
void
ia64_patch_imm60 (u64 insn_addr, u64 val)
{
- ia64_patch(insn_addr,
+ /* The assembler may generate offset pointing to either slot 1
+ or slot 2 for a long (2-slot) instruction, occupying slots 1
+ and 2. */
+ insn_addr &= -16UL;
+ ia64_patch(insn_addr + 2,
0x011ffffe000UL, ( ((val & 0x0800000000000000UL) >> 23) /* bit 59 -> 36 */
| ((val & 0x00000000000fffffUL) << 13) /* bit 0 -> 13 */));
- ia64_patch(insn_addr - 1, 0x1fffffffffcUL, val >> 18);
+ ia64_patch(insn_addr + 1, 0x1fffffffffcUL, val >> 18);
}
/*