diff options
| -rw-r--r-- | sys/ia64/ia64/vm_machdep.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/sys/ia64/ia64/vm_machdep.c b/sys/ia64/ia64/vm_machdep.c index a9f927a..2aa78fd 100644 --- a/sys/ia64/ia64/vm_machdep.c +++ b/sys/ia64/ia64/vm_machdep.c @@ -149,6 +149,32 @@ cpu_set_upcall(struct thread *td, struct thread *td0) void cpu_set_upcall_kse(struct thread *td, struct kse_upcall *ku) { + struct ia64_fdesc *fd; + struct trapframe *tf; + uint64_t stack; + + tf = td->td_frame; + KASSERT(tf->tf_flags & FRAME_SYSCALL, ("foo")); + bzero(&tf->tf_special, sizeof(tf->tf_special)); + /* + * ku->ku_func of course points to a function descriptor. Fetch the + * code address and GP value from userland. + */ + fd = ku->ku_func; + tf->tf_special.rp = fuword(&fd->func); + tf->tf_special.gp = fuword(&fd->gp); + tf->tf_special.pfs = (3UL<<62) | (1UL<<7) | 1UL; + stack = (uint64_t)ku->ku_stack.ss_sp; + tf->tf_special.bspstore = stack + 8; + tf->tf_special.sp = (stack + ku->ku_stack.ss_size - 16) & ~15; + tf->tf_special.rsc = 0xf; + tf->tf_special.fpsr = IA64_FPSR_DEFAULT; + tf->tf_special.psr = IA64_PSR_IC | IA64_PSR_I | IA64_PSR_IT | + IA64_PSR_DT | IA64_PSR_RT | IA64_PSR_DFH | IA64_PSR_BN | + IA64_PSR_CPL_USER; + + /* XXX assumes that (bspstore & 0x1f8) < 0x1e0. */ + suword((caddr_t)tf->tf_special.bspstore - 8, (uint64_t)ku->ku_mailbox); } /* |
