diff options
Diffstat (limited to 'coroutine/ppc64le/Context.S')
| -rw-r--r-- | coroutine/ppc64le/Context.S | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/coroutine/ppc64le/Context.S b/coroutine/ppc64le/Context.S index 61be9efcf0..819264c245 100644 --- a/coroutine/ppc64le/Context.S +++ b/coroutine/ppc64le/Context.S @@ -1,14 +1,20 @@ #define TOKEN_PASTE(x,y) x##y -#define PREFIXED_SYMBOL(prefix,name) TOKEN_PASTE(prefix,name) +.abiversion 2 .text .align 2 -.globl PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer) -.type PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer), @function -PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer): +.globl PREFIXED_SYMBOL(coroutine_transfer) +.type PREFIXED_SYMBOL(coroutine_transfer), @function +PREFIXED_SYMBOL(coroutine_transfer): + # Global entry: set up TOC pointer (r2) from r12. + # Required by ELFv2 ABI when this function is reached via the PLT. + addis 2, 12, .TOC. - PREFIXED_SYMBOL(coroutine_transfer)@ha + addi 2, 2, .TOC. - PREFIXED_SYMBOL(coroutine_transfer)@l + .localentry PREFIXED_SYMBOL(coroutine_transfer), .-PREFIXED_SYMBOL(coroutine_transfer) + # Make space on the stack for caller registers - addi 1,1,-152 + addi 1,1,-160 # Save caller registers std 14,0(1) @@ -34,6 +40,10 @@ PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer): mflr 0 std 0,144(1) + # Save caller special register + mfcr 0 + std 0, 152(1) + # Save stack pointer to first argument std 1,0(3) @@ -64,8 +74,14 @@ PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer): ld 0,144(1) mtlr 0 + # Load special registers + ld 0,152(1) + # Restore cr register cr2, cr3 and cr4 (field index 3,4,5) + # (field index is 1-based, field 1 = cr0) using a mask (32|16|8 = 56) + mtcrf 56,0 + # Pop stack frame - addi 1,1,152 + addi 1,1,160 # Jump to return address blr |