| 39,9 → 39,7 |
|---|
| .global interrupt_handlers |
| .global memsetb |
| .global memsetw |
| .global memcmp |
| |
| |
| ## Turn paging on |
| # |
| # Enable paging and write-back caching in CR0. |
| 202,32 → 200,6 |
|---|
| ret |
| |
| |
| ## Compare memory regions for equality |
| # |
| # Compare a given number of bytes (3rd argument) |
| # at memory locations defined by 1st and 2nd argument |
| # for equality. If the bytes are equal, EAX contains 0. |
| # |
| SRC=12 |
| DST=16 |
| CNT=20 |
| memcmp: |
| push %esi |
| push %edi |
| |
| movl CNT(%esp),%ecx |
| movl DST(%esp),%edi |
| movl SRC(%esp),%esi |
| |
| repe cmpsb %es:(%edi),%ds:(%esi) |
| movl %ecx,%eax # %ecx contains the return value (zero on success) |
| |
| pop %edi |
| pop %esi |
| |
| ret |
| |
| |
| # THIS IS USERSPACE CODE |
| .global utext |
| utext: |