> Date: Sun, 16 Oct 2016 23:30:07 -0700
> From: Philip Guenther <guent...@gmail.com>
>
> In 2003(!) a pile of code was deleted from sparc64's locore.s:
> ----------------------------
> revision 1.35
> date: 2003/05/17 07:09:08; author: art; state: Exp; lines: +1 -957;
> Get rid of lots of hairy ifdefs that we'll most likely never use.
> TRAPTRACE, TRAPSTATS, FLTTRACE and SCHED_DEBUG.
>
> mdw@ henric@ ok.
> ----------------------------
>
> That was the code that actually put data into the trap_trace[] array,
> rendering the remaining trap_trace* code useless. How about we delete
> those bits?
>
> This built and the box booted with the resulting kernel.
>
> ok?
ok kettenis@
> Index: sparc64/autoconf.c
> ===================================================================
> RCS file: /cvs/src/sys/arch/sparc64/sparc64/autoconf.c,v
> retrieving revision 1.126
> diff -u -p -r1.126 autoconf.c
> --- sparc64/autoconf.c 8 Jun 2016 17:24:44 -0000 1.126
> +++ sparc64/autoconf.c 17 Oct 2016 06:25:36 -0000
> @@ -586,11 +586,6 @@ bootpath_build(void)
> #else
> printf("kernel has no debugger\n");
> #endif
> - } else if (*cp == 't') {
> - /* turn on traptrace w/o breaking into kdb */
> - extern int trap_trace_dis;
> -
> - trap_trace_dis = 0;
> }
> }
> }
> Index: sparc64/db_interface.c
> ===================================================================
> RCS file: /cvs/src/sys/arch/sparc64/sparc64/db_interface.c,v
> retrieving revision 1.45
> diff -u -p -r1.45 db_interface.c
> --- sparc64/db_interface.c 8 Oct 2016 05:49:09 -0000 1.45
> +++ sparc64/db_interface.c 17 Oct 2016 06:25:37 -0000
> @@ -73,17 +73,6 @@ db_regs_t ddb_regs; /* register state */
>
> extern void OF_enter(void);
>
> -extern struct traptrace {
> - unsigned short tl:3, /* Trap level */
> - ns:4, /* PCB nsaved */
> - tt:9; /* Trap type */
> - unsigned short pid; /* PID */
> - u_int tstate; /* tstate */
> - u_int tsp; /* sp */
> - u_int tpc; /* pc */
> - u_int tfault; /* MMU tag access */
> -} trap_trace[], trap_trace_end[];
> -
> static long nil;
>
> static int
> @@ -231,14 +220,12 @@ void db_pmap_kernel(db_expr_t, int, db_e
> void db_pload_cmd(db_expr_t, int, db_expr_t, char *);
> void db_pmap_cmd(db_expr_t, int, db_expr_t, char *);
> void db_lock(db_expr_t, int, db_expr_t, char *);
> -void db_traptrace(db_expr_t, int, db_expr_t, char *);
> void db_dump_buf(db_expr_t, int, db_expr_t, char *);
> void db_dump_espcmd(db_expr_t, int, db_expr_t, char *);
> void db_watch(db_expr_t, int, db_expr_t, char *);
> void db_xir(db_expr_t, int, db_expr_t, char *);
>
> static void db_dump_pmap(struct pmap*);
> -static void db_print_trace_entry(struct traptrace *, int);
>
> #ifdef MULTIPROCESSOR
> void db_cpuinfo_cmd(db_expr_t, int, db_expr_t, char *);
> @@ -272,9 +259,6 @@ db_ktrap(type, tf)
> struct trapstate *ts = &ddb_regs.ddb_ts[0];
> extern int savetstate(struct trapstate *ts);
> extern void restoretstate(int tl, struct trapstate *ts);
> - extern int trap_trace_dis;
> -
> - trap_trace_dis++;
>
> #if NTDA > 0
> tda_full_blast();
> @@ -336,7 +320,6 @@ db_ktrap(type, tf)
> *(struct frame *)tf->tf_out[6] = ddb_regs.ddb_fr;
> #endif
> *tf = ddb_regs.ddb_tf;
> - trap_trace_dis--;
>
> #ifdef MULTIPROCESSOR
> if (!db_switch_cpu)
> @@ -1098,78 +1081,6 @@ db_setpcb(addr, have_addr, count, modif)
> db_printf("PID %ld not found.\n", addr);
> }
>
> -static void
> -db_print_trace_entry(te, i)
> - struct traptrace *te;
> - int i;
> -{
> - db_printf("%d:%d p:%d tt:%d:%llx:%llx %llx:%llx ", i,
> - (int)te->tl, (int)te->pid,
> - (int)te->tt, (unsigned long long)te->tstate,
> - (unsigned long long)te->tfault, (unsigned long long)te->tsp,
> - (unsigned long long)te->tpc);
> - db_printsym((u_long)te->tpc, DB_STGY_PROC, db_printf);
> - db_printf(": ");
> - if ((te->tpc && !(te->tpc&0x3)) &&
> - curproc &&
> - (curproc->p_pid == te->pid)) {
> - db_disasm((u_long)te->tpc, 0);
> - } else db_printf("\n");
> -}
> -
> -void
> -db_traptrace(addr, have_addr, count, modif)
> - db_expr_t addr;
> - int have_addr;
> - db_expr_t count;
> - char *modif;
> -{
> - int i, start = 0, full = 0, reverse = 0;
> - struct traptrace *end;
> -
> - start = 0;
> - end = &trap_trace_end[0];
> -
> - {
> - register char c, *cp = modif;
> - if (modif)
> - while ((c = *cp++) != 0) {
> - if (c == 'f')
> - full = 1;
> - if (c == 'r')
> - reverse = 1;
> - }
> - }
> -
> - if (have_addr) {
> - start = addr / (sizeof (struct traptrace));
> - if (&trap_trace[start] > &trap_trace_end[0]) {
> - db_printf("Address out of range.\n");
> - return;
> - }
> - if (!full) end = &trap_trace[start+1];
> - }
> -
> - db_printf("#:tl p:pid tt:tt:tstate:tfault sp:pc\n");
> - if (reverse) {
> - if (full && start)
> - for (i=start; --i;) {
> - db_print_trace_entry(&trap_trace[i], i);
> - }
> - i = (end - &trap_trace[0]);
> - while(--i > start) {
> - db_print_trace_entry(&trap_trace[i], i);
> - }
> - } else {
> - for (i=start; &trap_trace[i] < end ; i++) {
> - db_print_trace_entry(&trap_trace[i], i);
> - }
> - if (full && start)
> - for (i=0; i < start ; i++) {
> - db_print_trace_entry(&trap_trace[i], i);
> - }
> - }
> -}
>
> /*
> * Use physical or virtual watchpoint registers -- ugh
> @@ -1285,7 +1196,6 @@ struct db_command db_machine_command_tab
> { "stack", db_dump_stack, 0, 0 },
> { "tf", db_dump_trap, 0, 0 },
> { "ts", db_dump_ts, 0, 0 },
> - { "traptrace", db_traptrace, 0, 0 },
> { "watch", db_watch, 0, 0 },
> { "window", db_dump_window, 0, 0 },
> { "xir", db_xir, 0, 0 },
> Index: sparc64/locore.s
> ===================================================================
> RCS file: /cvs/src/sys/arch/sparc64/sparc64/locore.s,v
> retrieving revision 1.183
> diff -u -p -r1.183 locore.s
> --- sparc64/locore.s 23 May 2016 20:11:49 -0000 1.183
> +++ sparc64/locore.s 17 Oct 2016 06:25:38 -0000
> @@ -1345,21 +1345,6 @@ panic_red:
> .endm
> #endif /* DEBUG_NOTDEF */
>
> -#define TRACESIZ 0x01000
> - .globl _C_LABEL(trap_trace)
> - .globl _C_LABEL(trap_trace_ptr)
> - .globl _C_LABEL(trap_trace_end)
> - .globl _C_LABEL(trap_trace_dis)
> - .data
> -_C_LABEL(trap_trace_dis):
> - .word 1, 1 ! Starts disabled. DDB turns it on.
> -_C_LABEL(trap_trace_ptr):
> - .word 0, 0, 0, 0
> -_C_LABEL(trap_trace):
> - .space TRACESIZ
> -_C_LABEL(trap_trace_end):
> - .space 0x20 ! safety margin
> -
> /*
> * v9 machines do not have a trap window.
> *
> Index: sparc64/trap.c
> ===================================================================
> RCS file: /cvs/src/sys/arch/sparc64/sparc64/trap.c,v
> retrieving revision 1.94
> diff -u -p -r1.94 trap.c
> --- sparc64/trap.c 8 Oct 2016 05:49:09 -0000 1.94
> +++ sparc64/trap.c 17 Oct 2016 06:25:38 -0000
> @@ -431,10 +431,7 @@ trap(struct trapframe64 *tf, unsigned ty
>
> default:
> if (type < 0x100) {
> - extern int trap_trace_dis;
> dopanic:
> - trap_trace_dis = 1;
> -
> panic("trap type 0x%x (%s): pc=%lx npc=%lx pstate=%b",
> type, type < N_TRAP_TYPES ? trap_type[type] : T,
> pc, (long)tf->tf_npc, pstate, PSTATE_BITS);
> @@ -851,8 +848,6 @@ data_access_fault(struct trapframe64 *tf
> kfault:
> onfault = (long)p->p_addr->u_pcb.pcb_onfault;
> if (!onfault) {
> - extern int trap_trace_dis;
> - trap_trace_dis = 1; /* Disable traptrace for
> printf */
> (void) splhigh();
> panic("kernel data fault: pc=%lx addr=%lx",
> pc, addr);
> @@ -934,9 +929,6 @@ data_access_error(struct trapframe64 *tf
> if (tstate & TSTATE_PRIV) {
>
> if (!onfault) {
> - extern int trap_trace_dis;
> -
> - trap_trace_dis = 1; /* Disable traptrace for printf */
> (void) splhigh();
> panic("data fault: pc=%lx addr=%lx sfsr=%lb",
> (u_long)pc, (long)sfva, sfsr, SFSR_BITS);
> @@ -998,8 +990,6 @@ text_access_fault(struct trapframe64 *tf
>
> access_type = PROT_EXEC;
> if (tstate & TSTATE_PRIV) {
> - extern int trap_trace_dis;
> - trap_trace_dis = 1; /* Disable traptrace for printf */
> (void) splhigh();
> panic("kernel text_access_fault: pc=%lx va=%lx", pc, va);
> /* NOTREACHED */
> @@ -1031,8 +1021,6 @@ text_access_fault(struct trapframe64 *tf
> * fault, deliver SIGSEGV.
> */
> if (tstate & TSTATE_PRIV) {
> - extern int trap_trace_dis;
> - trap_trace_dis = 1; /* Disable traptrace for printf */
> (void) splhigh();
> panic("kernel text fault: pc=%llx", (unsigned long
> long)pc);
> /* NOTREACHED */
> @@ -1076,13 +1064,9 @@ text_access_error(struct trapframe64 *tf
> tstate = tf->tf_tstate;
>
> if ((afsr) != 0) {
> - extern int trap_trace_dis;
> -
> - trap_trace_dis++; /* Disable traptrace for printf */
> printf("text_access_error: memory error...\n");
> printf("text memory error type %d sfsr=%lx sfva=%lx afsr=%lx
> afva=%lx tf=%p\n",
> type, sfsr, pc, afsr, afva, tf);
> - trap_trace_dis--; /* Reenable traptrace for printf */
>
> if (tstate & TSTATE_PRIV)
> panic("text_access_error: kernel memory error");
> @@ -1101,8 +1085,6 @@ text_access_error(struct trapframe64 *tf
> /* Now munch on protections... */
> access_type = PROT_EXEC;
> if (tstate & TSTATE_PRIV) {
> - extern int trap_trace_dis;
> - trap_trace_dis = 1; /* Disable traptrace for printf */
> (void) splhigh();
> panic("kernel text error: pc=%lx sfsr=%lb", pc,
> sfsr, SFSR_BITS);
> @@ -1136,8 +1118,6 @@ text_access_error(struct trapframe64 *tf
> * fault, deliver SIGSEGV.
> */
> if (tstate & TSTATE_PRIV) {
> - extern int trap_trace_dis;
> - trap_trace_dis = 1; /* Disable traptrace for printf */
> (void) splhigh();
> panic("kernel text error: pc=%lx sfsr=%lb", pc,
> sfsr, SFSR_BITS);
>
>
