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kernel: separate state for trace-deferred syscalls

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state is usually not in p_reg any more with sysenter/syscall trap entries,
so when saving/restarting do_ipc invocations the state has to be remembered
explicitly.
This commit is contained in:
Ben Gras
2013-01-04 17:14:31 +00:00
parent 7f1018b145
commit 51a3e84a97
3 changed files with 11 additions and 1 deletions
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4
kernel/proc.c
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@@ -546,7 +546,11 @@ int do_ipc(reg_t r1, reg_t r2, reg_t r3)
* input message. Postpone the entire system call.
*/
caller_ptr->p_misc_flags &= ~MF_SC_TRACE;
assert(!(caller_ptr->p_misc_flags & MF_SC_DEFER));
caller_ptr->p_misc_flags |= MF_SC_DEFER;
caller_ptr->p_defer.r1 = r1;
caller_ptr->p_defer.r2 = r2;
caller_ptr->p_defer.r3 = r3;
/* Signal the "enter system call" event. Block the process. */
cause_sig(proc_nr(caller_ptr), SIGTRAP);