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Diffstat (limited to 'sim/bpf/mloop.in')
| -rw-r--r-- | sim/bpf/mloop.in | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/sim/bpf/mloop.in b/sim/bpf/mloop.in deleted file mode 100644 index 4ec5d29..0000000 --- a/sim/bpf/mloop.in +++ /dev/null @@ -1,168 +0,0 @@ -# Simulator main loop for eBPF. -*- C -*- -# -# Copyright (C) 2020-2023 Free Software Foundation, Inc. -# -# This file is part of the GNU Simulators. -# -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 3 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program. If not, see <http://www.gnu.org/licenses/>. - -# Syntax: -# /bin/sh mloop.in command -# -# Command is one of: -# -# init -# support -# extract-{simple,scache,pbb} -# {full,fast}-exec-{simple,scache,pbb} -# -# A target need only provide a "full" version of one of simple,scache,pbb. -# If the target wants it can also provide a fast version of same, or if -# the slow (full featured) version is `simple', then the fast version can be -# one of scache/pbb. -# A target can't provide more than this. -# However for illustration's sake this file provides examples of all. - -# ??? After a few more ports are done, revisit. -# Will eventually need to machine generate a lot of this. - -case "x$1" in - -xsupport) - -cat <<EOF - -static INLINE const IDESC * -extract (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_WORD insn, - ARGBUF *abuf, int fast_p) -{ - const IDESC *id = @prefix@_decode (current_cpu, pc, insn, abuf); - @prefix@_fill_argbuf (current_cpu, abuf, id, pc, fast_p); - if (!fast_p) - { - int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc); - int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc); - @prefix@_fill_argbuf_tp (current_cpu, abuf, trace_p, profile_p); - } - return id; -} - -static INLINE SEM_PC -execute (SIM_CPU *current_cpu, SCACHE *sc, int fast_p) -{ - SEM_PC vpc; - - if (fast_p) - vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, sc); - else - { - ARGBUF *abuf = &sc->argbuf; - const IDESC *idesc = abuf->idesc; - const CGEN_INSN *idata = idesc->idata; - int virtual_p = 0; - - if (! virtual_p) - { - /* FIXME: call x-before */ - if (ARGBUF_PROFILE_P (abuf)) - PROFILE_COUNT_INSN (current_cpu, abuf->addr, idesc->num); - /* FIXME: Later make cover macros: PROFILE_INSN_{INIT,FINI}. */ - if (PROFILE_MODEL_P (current_cpu) - && ARGBUF_PROFILE_P (abuf)) - @cpu@_model_insn_before (current_cpu, 1 /*first_p*/); - CGEN_TRACE_INSN_INIT (current_cpu, abuf, 1); - CGEN_TRACE_INSN (current_cpu, idata, - (const struct argbuf *) abuf, abuf->addr); - } - vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, sc); - if (! virtual_p) - { - /* FIXME: call x-after */ - if (PROFILE_MODEL_P (current_cpu) - && ARGBUF_PROFILE_P (abuf)) - { - int cycles; - - cycles = (*idesc->timing->model_fn) (current_cpu, sc); - @cpu@_model_insn_after (current_cpu, 1 /*last_p*/, cycles); - } - CGEN_TRACE_INSN_FINI (current_cpu, abuf, 1); - } - } - - return vpc; -} - -EOF - -;; - -xinit) - -# Nothing needed. - -;; - -xextract-scache) - -cat <<EOF -{ - - UDI insn = GETIMEMUDI (current_cpu, vpc); - - if (CURRENT_TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) - { - UHI off16; - USI imm32; - - /* eBPF instructions are little-endian, but GETIMEMUDI reads according - to target byte order. Swap to little-endian. */ - insn = SWAP_8 (insn); - - /* But, the imm32 and offset16 fields within instructions follow target - byte order. Swap those fields back. */ - off16 = (UHI) ((insn & 0x00000000ffff0000) >> 16); - imm32 = (USI) ((insn & 0xffffffff00000000) >> 32); - off16 = SWAP_2 (off16); - imm32 = SWAP_4 (imm32); - - insn = (((UDI) imm32) << 32) | (((UDI) off16) << 16) | (insn & 0xffff); - } - - extract (current_cpu, vpc, insn, SEM_ARGBUF (sc), FAST_P); - - //XXX SEM_SKIP_COMPILE (current_cpu, sc, 1); -} -EOF - -;; - -xfull-exec-* | xfast-exec-*) - -# Inputs: current_cpu, vpc, sc, FAST_P -# Outputs: vpc -# vpc is the virtual program counter. - -cat <<EOF - vpc = execute (current_cpu, sc, FAST_P); -EOF - -;; - -*) - echo "Invalid argument to mainloop.in: $1" >&2 - exit 1 - ;; - -esac |