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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2014-09-17 01:50:05 +0200 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2014-09-17 01:50:05 +0200 |
| commit | 96cec60d956bfb27f135d4e932a1c319cbc878df (patch) | |
| tree | cf5c24b302c1e3950075cdddee67f9539a24642c /i386 | |
| parent | 5ae510e35c54009626999a88f0f1cb34d6dfc94f (diff) | |
Report DR6 to userland
* i386/i386/trap.c (user_trap): On T_DEBUG, record the content of dr6 in
PCB, and clear it.
Diffstat (limited to 'i386')
| -rw-r--r-- | i386/i386/trap.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/i386/i386/trap.c b/i386/i386/trap.c index 200cbccc..9d4d43d0 100644 --- a/i386/i386/trap.c +++ b/i386/i386/trap.c @@ -395,6 +395,11 @@ printf("user trap %d error %d sub %08x\n", type, code, subcode); return 0; } #endif /* MACH_KDB */ + /* Make the content of the debug status register (DR6) + available to user space. */ + if (thread->pcb) + thread->pcb->ims.ids.dr[6] = get_dr6() & 0x600F; + set_dr6(0); exc = EXC_BREAKPOINT; code = EXC_I386_SGL; break; |