fbt/powerpc/fbt_isa.c

47 #define FBT_IS_JUMP(instr)	((instr & ~FBT_BR_MASK) == FBT_BRANCH)
116 	uint32_t *instr, *limit;
135 	instr = (uint32_t *) symval->value;
138 	for (; instr < limit; instr++)
139 		if (*instr == FBT_MFLR_R0)
142 	if (*instr != FBT_MFLR_R0)
149 	fbt->fbtp_patchpoint = instr;
152 	fbt->fbtp_savedval = *instr;
157 	fbt->fbtp_hashnext = fbt_probetab[FBT_ADDR2NDX(instr)];
158 	fbt_probetab[FBT_ADDR2NDX(instr)] = fbt;
164 	if (instr >= limit)
179 		ptr = *(uint32_t **)instr;
182 			instr++;
187 	if (*instr != FBT_MTLR_R0) {
188 		instr++;
192 	instr++;
194 	for (j = 0; j < 12 && instr < limit; j++, instr++) {
195 		if ((*instr == FBT_BCTR) || (*instr == FBT_BLR) ||
196 		    FBT_IS_JUMP(*instr))
200 	if (!(*instr == FBT_BCTR || *instr == FBT_BLR || FBT_IS_JUMP(*instr)))
218 	fbt->fbtp_patchpoint = instr;
223 	if (*instr == FBT_BCTR)
225 	else if (*instr == FBT_BLR)
231 	    (uintptr_t)((uint8_t *)instr - (uint8_t *)symval->value);
233 	fbt->fbtp_savedval = *instr;
235 	fbt->fbtp_hashnext = fbt_probetab[FBT_ADDR2NDX(instr)];
236 	fbt_probetab[FBT_ADDR2NDX(instr)] = fbt;
240 	instr += 4;