kernel/bpf/verifier.c

333 		u8 frameno;
591 	return cur->frame[reg->frameno];
1343 	state->refs[new_ofs].callback_ref = state->in_callback_fn ? state->frameno : 0;
1357 			if (state->in_callback_fn && state->refs[i].callback_ref != state->frameno)
2309 	reg->frameno = 0;
2392 	regs[BPF_REG_FP].frameno = state->frameno;
2403 			    int callsite, int frameno, int subprogno)
2406 	state->frameno = frameno;
2449 			0 /* frameno within this callchain */,
3310 static int insn_stack_access_flags(int frameno, int spi)
3312 	return INSN_F_STACK_ACCESS | (spi << INSN_F_SPI_SHIFT) | frameno;
4503 	int insn_flags = insn_stack_access_flags(state->frameno, spi);
4803 	int insn_flags = insn_stack_access_flags(reg_state->frameno, spi);
7877 		meta->iter.frameno = reg->frameno;
8049 	int iter_frameno = meta->iter.frameno;
9381 			state->curframe + 1 /* frameno within this callchain */,
10128 	if (!exception_exit && state->frameno && !state->in_callback_fn)
10132 		if (!exception_exit && state->in_callback_fn && state->refs[i].callback_ref != state->frameno)
16790 		return regs_exact(rold, rcur, idmap) && rold->frameno == rcur->frameno;
20749 			0 /* frameno */,