| /* |
| * typedef void (*PushAllRegistersCallback)(ThreadState*, intptr_t*); |
| * extern "C" void PushAllRegisters(ThreadState*, PushAllRegistersCallback) |
| */ |
| |
| .type PushAllRegisters, %function |
| .global PushAllRegisters |
| .hidden PushAllRegisters |
| PushAllRegisters: |
| // Push all callee-saves registers to get them |
| // on the stack for conservative stack scanning. |
| // Reserve space for callee-saved registers and minimal stack frame. |
| mflr 0 |
| std 0,16(1) |
| stdu 1,-176(1) // 3218*8 = min stack non-volatile registers |
| |
| // Save the callee-saved register |
| std 31,168(1) |
| std 30,160(1) |
| std 29,152(1) |
| std 28,144(1) |
| std 27,136(1) |
| std 26,128(1) |
| std 25,120(1) |
| std 24,112(1) |
| std 23,104(1) |
| std 22,96(1) |
| std 21,88(1) |
| std 20,80(1) |
| std 19,72(1) |
| std 18,64(1) |
| std 17,56(1) |
| std 16,48(1) |
| std 15,40(1) |
| std 14,32(1) |
| // Note: the callee-saved floating point registers do not need to be |
| // copied to the stack, because fp registers never hold heap pointers |
| // and so do not need to be kept visible to the garbage collector. |
| // Pass the first argument untouched in r3 and the |
| // stack pointer to the callback. |
| std 2, 24(1) |
| mtctr 4 |
| mr 12, 4 |
| mr 4, 1 |
| bctrl |
| ld 2, 24(1) |
| |
| // Adjust stack, restore return address and return. |
| // Note: the copied registers do not need to be reloaded here, |
| // because they were preserved by the called routine. |
| addi 1,1,176 |
| ld 0,16(1) |
| mtlr 0 |
| blr |
