| 0,0 → 1,51 |
|---|
| /** @addtogroup ia32 |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #include <proc/thread.h> |
| #include <console/klog.h> |
| #include <arch/tdebug.h> |
| |
| /* trap flag */ |
| #define EFLAGS_TF 0x100 |
| |
| /** |
| * Called when the IAFTER event setting is (potentially) changed. |
| * |
| * On this arch the TRAP flag in userspace state is set |
| * according to the setting of TDEBUG_EVMASK_IAFTER |
| * in order to stop after the execution of each instruction. |
| * |
| * The calling thread must have already locked t. |
| * |
| * Returns 0 on success, non-zero on failure. (Mainly if IAFTER is set, but |
| * architecture does not support it.) |
| */ |
| int tdebug_iafter_update(thread_t *t) |
| { |
| uint32_t eflags; |
| |
| if (t->tdebug.uspace_state == NULL) { |
| /* userspace state is not available */ |
| /* FIXME: this should not happen when properly imlemented */ |
| klog_printf("fail: uspace_state not available\n"); |
| return -1; |
| } |
| |
| eflags = t->tdebug.uspace_state->eflags; |
| |
| if ((t->tdebug.event_mask & TDEBUG_EVMASK_IAFTER) != 0) { |
| eflags = eflags | EFLAGS_TF; |
| } else { |
| eflags = eflags & ~EFLAGS_TF; |
| } |
| |
| t->tdebug.uspace_state->eflags = eflags; |
| return 0; |
| } |
| |
| |
| /** @} |
| */ |