fbt/x86/fbt_isa.c

23  * $FreeBSD: stable/11/sys/cddl/dev/fbt/x86/fbt_isa.c 307837 2016-10-24 01:29:46Z markj $
37 #include "fbt.h"
66 	fbt_probe_t *fbt;
76 	fbt = fbt_probetab[FBT_ADDR2NDX(addr)];
77 	for (; fbt != NULL; fbt = fbt->fbtp_hashnext) {
78 		if ((uintptr_t)fbt->fbtp_patchpoint == addr) {
79 			if (fbt->fbtp_roffset == 0) {
81 				/* fbt->fbtp_rval == DTRACE_INVOP_PUSHQ_RBP */
113 				dtrace_probe(fbt->fbtp_id, arg0, arg1,
131 				dtrace_probe(fbt->fbtp_id, fbt->fbtp_roffset,
136 			return (fbt->fbtp_rval);
144 fbt_patch_tracepoint(fbt_probe_t *fbt, fbt_patchval_t val)
147 	*fbt->fbtp_patchpoint = val;
156 	fbt_probe_t *fbt, *retfbt;
212 	fbt = malloc(sizeof (fbt_probe_t), M_FBT, M_WAITOK | M_ZERO);
213 	fbt->fbtp_name = name;
214 	fbt->fbtp_id = dtrace_probe_create(fbt_id, modname,
215 	    name, FBT_ENTRY, 3, fbt);
216 	fbt->fbtp_patchpoint = instr;
217 	fbt->fbtp_ctl = lf;
218 	fbt->fbtp_loadcnt = lf->loadcnt;
219 	fbt->fbtp_rval = DTRACE_INVOP_PUSHL_EBP;
220 	fbt->fbtp_savedval = *instr;
221 	fbt->fbtp_patchval = FBT_PATCHVAL;
222 	fbt->fbtp_symindx = symindx;
224 	fbt->fbtp_hashnext = fbt_probetab[FBT_ADDR2NDX(instr)];
225 	fbt_probetab[FBT_ADDR2NDX(instr)] = fbt;
294 	fbt = malloc(sizeof (fbt_probe_t), M_FBT, M_WAITOK | M_ZERO);
295 	fbt->fbtp_name = name;
298 		fbt->fbtp_id = dtrace_probe_create(fbt_id, modname,
299 		    name, FBT_RETURN, 3, fbt);
301 		retfbt->fbtp_next = fbt;
302 		fbt->fbtp_id = retfbt->fbtp_id;
305 	retfbt = fbt;
306 	fbt->fbtp_patchpoint = instr;
307 	fbt->fbtp_ctl = lf;
308 	fbt->fbtp_loadcnt = lf->loadcnt;
309 	fbt->fbtp_symindx = symindx;
313 		fbt->fbtp_rval = DTRACE_INVOP_POPL_EBP;
316 		fbt->fbtp_rval = DTRACE_INVOP_LEAVE;
318 	fbt->fbtp_roffset =
323 	fbt->fbtp_rval = DTRACE_INVOP_RET;
324 	fbt->fbtp_roffset =
328 	fbt->fbtp_savedval = *instr;
329 	fbt->fbtp_patchval = FBT_PATCHVAL;
330 	fbt->fbtp_hashnext = fbt_probetab[FBT_ADDR2NDX(instr)];
331 	fbt_probetab[FBT_ADDR2NDX(instr)] = fbt;