| comment "subroutine prologue" | |
| .macro gdbasm_enter | |
| push %rbp | |
| mov %rsp,%rbp | |
| .endm | |
| comment "subroutine epilogue" | |
| .macro gdbasm_leave | |
| pop %rbp | |
| ret | |
| .endm | |
| .macro gdbasm_call subr | |
| call \subr | |
| .endm | |
| .macro gdbasm_several_nops | |
| nop | |
| nop | |
| nop | |
| nop | |
| .endm | |
| comment "exit (0)" | |
| .macro gdbasm_exit0 | |
| hlt | |
| .endm | |
| comment "crt0 startup" | |
| .macro gdbasm_startup | |
| xor %rbp, %rbp | |
| .endm | |
| comment "Declare a data variable" | |
| .macro gdbasm_datavar name value | |
| .data | |
| \name: | |
| .long \value | |
| .endm |