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Index: head/sys/kern/subr_syscall.c
===================================================================
--- head/sys/kern/subr_syscall.c
+++ head/sys/kern/subr_syscall.c
@@ -85,6 +85,8 @@
STOPEVENT(p, S_SCE, sa->narg);
if (p->p_flag & P_TRACED && p->p_stops & S_PT_SCE) {
PROC_LOCK(p);
+ td->td_dbg_sc_code = sa->code;
+ td->td_dbg_sc_narg = sa->narg;
ptracestop((td), SIGTRAP);
PROC_UNLOCK(p);
}
@@ -94,6 +96,10 @@
* debugger modified registers or memory.
*/
error = (p->p_sysent->sv_fetch_syscall_args)(td, sa);
+ PROC_LOCK(p);
+ td->td_dbg_sc_code = sa->code;
+ td->td_dbg_sc_narg = sa->narg;
+ PROC_UNLOCK(p);
#ifdef KTRACE
if (KTRPOINT(td, KTR_SYSCALL))
ktrsyscall(sa->code, sa->narg, sa->args);
Index: head/sys/kern/sys_process.c
===================================================================
--- head/sys/kern/sys_process.c
+++ head/sys/kern/sys_process.c
@@ -97,6 +97,8 @@
struct siginfo32 pl_siginfo; /* siginfo for signal */
char pl_tdname[MAXCOMLEN + 1]; /* LWP name. */
int pl_child_pid; /* New child pid */
+ u_int pl_syscall_code;
+ u_int pl_syscall_narg;
};
#endif
@@ -481,6 +483,8 @@
siginfo_to_siginfo32(&pl->pl_siginfo, &pl32->pl_siginfo);
strcpy(pl32->pl_tdname, pl->pl_tdname);
pl32->pl_child_pid = pl->pl_child_pid;
+ pl32->pl_syscall_code = pl->pl_syscall_code;
+ pl32->pl_syscall_narg = pl->pl_syscall_narg;
}
#endif /* COMPAT_FREEBSD32 */
@@ -1211,6 +1215,13 @@
pl->pl_sigmask = td2->td_sigmask;
pl->pl_siglist = td2->td_siglist;
strcpy(pl->pl_tdname, td2->td_name);
+ if ((td2->td_dbgflags & (TDB_SCE | TDB_SCX)) != 0) {
+ pl->pl_syscall_code = td2->td_dbg_sc_code;
+ pl->pl_syscall_narg = td2->td_dbg_sc_narg;
+ } else {
+ pl->pl_syscall_code = 0;
+ pl->pl_syscall_narg = 0;
+ }
#ifdef COMPAT_FREEBSD32
if (wrap32)
ptrace_lwpinfo_to32(pl, pl32);
Index: head/sys/sys/proc.h
===================================================================
--- head/sys/sys/proc.h
+++ head/sys/sys/proc.h
@@ -174,6 +174,7 @@
struct racct;
struct sbuf;
struct sleepqueue;
+struct syscall_args;
struct td_sched;
struct thread;
struct trapframe;
@@ -282,6 +283,8 @@
int td_no_sleeping; /* (k) Sleeping disabled count. */
int td_dom_rr_idx; /* (k) RR Numa domain selection. */
void *td_su; /* (k) FFS SU private */
+ u_int td_dbg_sc_code; /* (c) Syscall code to debugger. */
+ u_int td_dbg_sc_narg; /* (c) Syscall arg count to debugger.*/
#define td_endzero td_sigmask
/* Copied during fork1() or create_thread(). */
@@ -979,7 +982,6 @@
void cpu_exit(struct thread *);
void exit1(struct thread *, int, int) __dead2;
-struct syscall_args;
int cpu_fetch_syscall_args(struct thread *td, struct syscall_args *sa);
void cpu_fork(struct thread *, struct proc *, struct thread *, int);
void cpu_set_fork_handler(struct thread *, void (*)(void *), void *);
Index: head/sys/sys/ptrace.h
===================================================================
--- head/sys/sys/ptrace.h
+++ head/sys/sys/ptrace.h
@@ -113,6 +113,8 @@
struct __siginfo pl_siginfo; /* siginfo for signal */
char pl_tdname[MAXCOMLEN + 1]; /* LWP name */
int pl_child_pid; /* New child pid */
+ u_int pl_syscall_code;
+ u_int pl_syscall_narg;
};
/* Argument structure for PT_VM_ENTRY. */

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