| /SPARTAN/trunk/doc/TODO |
|---|
| 16,7 → 16,8 |
| + zero IOPL in EFLAGS [DONE] |
| + before IRET (from SYSCALL), zero NT in EFLAGS [DONE] |
| + [ia32] review the cache controling bits in CR0 register |
| + [ia32] zero the alignment exception bit in EFLAGS |
| + [ia32] zero the alignment exception bit in EFLAGS [DONE] |
| - Task changed to clean AM in CR0 so the alignment check is disabled globaly |
| + make emulated architectures also work on real hardware |
| + bring in support for other architectures (e.g. PowerPC) |
| /SPARTAN/trunk/arch/ia32/src/pm.c |
|---|
| 128,7 → 128,7 |
| } |
| // Clean IOPL(12,13) and NT(14) flags in EFLAGS register |
| /* Clean IOPL(12,13) and NT(14) flags in EFLAGS register */ |
| static void clean_IOPL_NT_flags(void) |
| { |
| asm |
| 144,7 → 144,7 |
| ); |
| } |
| // Clean AM(18) flag in CR0 register |
| /* Clean AM(18) flag in CR0 register */ |
| static void clean_AM_flag(void) |
| { |
| asm |
| 200,6 → 200,6 |
| */ |
| __asm__("ltr %0" : : "r" ((__u16) selector(TSS_DES))); |
| clean_IOPL_NT_flags(); //Disable I/O on nonprivileged levels |
| clean_AM_flag(); //Disable alignment check |
| clean_IOPL_NT_flags(); /* Disable I/O on nonprivileged levels */ |
| clean_AM_flag(); /* Disable alignment check */ |
| } |
| /SPARTAN/trunk/arch/ia32/src/userspace.c |
|---|
| 46,7 → 46,7 |
| pri = cpu_priority_high(); |
| __asm__ volatile ("" |
| // CLNT |
| /* CLNT */ |
| "pushfl;" |
| "pop %%eax;" |
| "and $0xFFFFBFFF,%%eax;" |