diff options
Diffstat (limited to 'src/coro_unix_x64.s')
| -rw-r--r-- | src/coro_unix_x64.s | 39 |
1 files changed, 21 insertions, 18 deletions
diff --git a/src/coro_unix_x64.s b/src/coro_unix_x64.s index 98710c2..d7de2a2 100644 --- a/src/coro_unix_x64.s +++ b/src/coro_unix_x64.s @@ -36,9 +36,9 @@ rerun: ; func(R7, R6, R2, R1, R8, R9, Z0-7): R0 ; ; # Stack layout of an in-flight coro -; ^coro -; ^func -; ^bp (base pointer of stack) +; *coro +; *func +; *bp (base pointer of stack) ; ....... STACK ......... ; Saved Clobbers ; @@ -57,31 +57,33 @@ rerun: ; R14 [1] ; R15 [0] -%define WORDS 8 -%define SAVES 9 +%define WORDSZ 8 +%define NSAVES 9 -; func sys.newCoro(co ^coro, fn func, bp ^stack) +; coro *coro·new(co *coro, fn func, bp *stack) _newcoro: - lea R0, [coroinit] - lea R1, [R2 - SAVES*WORDS] + lea R0, [coroinit] ; Store address of init function + lea R1, [R2 - NSAVES*WORDSZ] ; Store offset address of stack - mov [R1 + 8*WORDS], R7 - mov [R1 + 7*WORDS], R6 - mov [R1 + 6*WORDS], R0 - mov [R1 + 5*WORDS], R2 + mov [R1 + 8*WORDSZ], R7 ; Store context pointer + mov [R1 + 7*WORDSZ], R6 ; Store function pointer + mov [R1 + 6*WORDSZ], R0 ; Store initializer pointer + mov [R1 + 5*WORDSZ], R2 ; Store stack base pointer xor R0, R0 + ; Start of mutable stack ; Blank out the clobbers - mov [R1 + 4*WORDS], R0 ; R3 - mov [R1 + 3*WORDS], R0 ; R12 - mov [R1 + 2*WORDS], R0 ; R13 - mov [R1 + 1*WORDS], R0 ; R14 - mov [R1 + 0*WORDS], R0 ; R15 + mov [R1 + 4*WORDSZ], R0 ; R3 + mov [R1 + 3*WORDSZ], R0 ; R12 + mov [R1 + 2*WORDSZ], R0 ; R13 + mov [R1 + 1*WORDSZ], R0 ; R14 + mov [R1 + 0*WORDSZ], R0 ; R15 mov [R7], R1 ret +; Saves register state %macro pushclobs 0 push RBP push R3 @@ -91,6 +93,7 @@ _newcoro: push R15 %endmacro +; Restores register state %macro popclobs 0 pop R15 pop R14 @@ -100,7 +103,7 @@ _newcoro: pop RBP %endmacro -; func coro.yield(co ^coro, ret uintptr) +; uintptr coro.yield(co *coro, data uintptr) _coroyield: pushclobs mov R0, R6 ; Move return value into return register. |