JezK
Edit File: switch_arm64_masm.asm
AREA switch_arm64_masm, CODE, READONLY; GLOBAL slp_switch [FUNC] EXTERN slp_save_state_asm EXTERN slp_restore_state_asm slp_switch ; push callee saved registers to stack stp x19, x20, [sp, #-16]! stp x21, x22, [sp, #-16]! stp x23, x24, [sp, #-16]! stp x25, x26, [sp, #-16]! stp x27, x28, [sp, #-16]! stp x29, x30, [sp, #-16]! stp d8, d9, [sp, #-16]! stp d10, d11, [sp, #-16]! stp d12, d13, [sp, #-16]! stp d14, d15, [sp, #-16]! ; call slp_save_state_asm with stack pointer mov x0, sp bl slp_save_state_asm ; early return for return value of 1 and -1 cmp x0, #-1 b.eq RETURN cmp x0, #1 b.eq RETURN ; increment stack and frame pointer add sp, sp, x0 add x29, x29, x0 bl slp_restore_state_asm ; store return value for successful completion of routine mov x0, #0 RETURN ; pop registers from stack ldp d14, d15, [sp], #16 ldp d12, d13, [sp], #16 ldp d10, d11, [sp], #16 ldp d8, d9, [sp], #16 ldp x29, x30, [sp], #16 ldp x27, x28, [sp], #16 ldp x25, x26, [sp], #16 ldp x23, x24, [sp], #16 ldp x21, x22, [sp], #16 ldp x19, x20, [sp], #16 ret END