[AArch64] Fix libunwind build when using GNU assembler
Use x29 and x30 for fp and lr respectively.
This does not change the code generation with integrated asm
but using x30 and x29 helps compile the code with gnu as. Currently gas
fails to assemble this code with errors as below.
Error: operand X should be an integer register.
Newer versions of binutils should be fixed, but enough exists in the wild
to make this change harmless and worthy.
Patch by Khem Raj.
git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@260595 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/UnwindRegistersRestore.S b/src/UnwindRegistersRestore.S
index 3a4ea62..d5ecc6e 100644
--- a/src/UnwindRegistersRestore.S
+++ b/src/UnwindRegistersRestore.S
@@ -282,8 +282,8 @@
ldp x22,x23, [x0, #0x0B0]
ldp x24,x25, [x0, #0x0C0]
ldp x26,x27, [x0, #0x0D0]
- ldp x28,fp, [x0, #0x0E0]
- ldr lr, [x0, #0x100] // restore pc into lr
+ ldp x28,x29, [x0, #0x0E0]
+ ldr x30, [x0, #0x100] // restore pc into lr
ldr x1, [x0, #0x0F8]
mov sp,x1 // restore sp
@@ -306,7 +306,7 @@
ldr d31, [x0, #0x208]
ldp x0, x1, [x0, #0x000] // restore x0,x1
- ret lr // jump to pc
+ ret x30 // jump to pc
#elif defined(__arm__) && !defined(__APPLE__)
diff --git a/src/UnwindRegistersSave.S b/src/UnwindRegistersSave.S
index f84b711..82becff 100644
--- a/src/UnwindRegistersSave.S
+++ b/src/UnwindRegistersSave.S
@@ -263,11 +263,11 @@
stp x22,x23, [x0, #0x0B0]
stp x24,x25, [x0, #0x0C0]
stp x26,x27, [x0, #0x0D0]
- stp x28,fp, [x0, #0x0E0]
- str lr, [x0, #0x0F0]
+ stp x28,x29, [x0, #0x0E0]
+ str x30, [x0, #0x0F0]
mov x1,sp
str x1, [x0, #0x0F8]
- str lr, [x0, #0x100] // store return address as pc
+ str x30, [x0, #0x100] // store return address as pc
// skip cpsr
stp d0, d1, [x0, #0x110]
stp d2, d3, [x0, #0x120]