Mercurial > hg > nginx
view src/event/quic/bpf/bpfgen.sh @ 8962:47f45a98f892 quic
QUIC: fixed handling STREAM FIN.
Previously, when a STREAM FIN frame with no data bytes was received after all
prior stream data were already read by the application layer, the frame was
ignored and eof was not reported to the application.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Tue, 11 Jan 2022 18:57:02 +0300 |
parents | 7df607cb2d11 |
children |
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#!/bin/bash export LANG=C set -e if [ $# -lt 1 ]; then echo "Usage: PROGNAME=foo LICENSE=bar $0 <bpf object file>" exit 1 fi self=$0 filename=$1 funcname=$PROGNAME generate_head() { cat << END /* AUTO-GENERATED, DO NOT EDIT. */ #include <stddef.h> #include <stdint.h> #include "ngx_bpf.h" END } generate_tail() { cat << END ngx_bpf_program_t $PROGNAME = { .relocs = bpf_reloc_prog_$funcname, .nrelocs = sizeof(bpf_reloc_prog_$funcname) / sizeof(bpf_reloc_prog_$funcname[0]), .ins = bpf_insn_prog_$funcname, .nins = sizeof(bpf_insn_prog_$funcname) / sizeof(bpf_insn_prog_$funcname[0]), .license = "$LICENSE", .type = BPF_PROG_TYPE_SK_REUSEPORT, }; END } process_relocations() { echo "static ngx_bpf_reloc_t bpf_reloc_prog_$funcname[] = {" objdump -r $filename | awk '{ if (enabled && $NF > 0) { off = strtonum(sprintf("0x%s", $1)); name = $3; printf(" { \"%s\", %d },\n", name, off/8); } if ($1 == "OFFSET") { enabled=1; } }' echo "};" echo } process_section() { echo "static struct bpf_insn bpf_insn_prog_$funcname[] = {" echo " /* opcode dst src offset imm */" section_info=$(objdump -h $filename --section=$funcname | grep "1 $funcname") # dd doesn't know hex length=$(printf "%d" 0x$(echo $section_info | cut -d ' ' -f3)) offset=$(printf "%d" 0x$(echo $section_info | cut -d ' ' -f6)) for ins in $(dd if="$filename" bs=1 count=$length skip=$offset status=none | xxd -p -c 8) do opcode=0x${ins:0:2} srcdst=0x${ins:2:2} # bytes are dumped in LE order offset=0x${ins:6:2}${ins:4:2} # short immedi=0x${ins:14:2}${ins:12:2}${ins:10:2}${ins:8:2} # int dst="$(($srcdst & 0xF))" src="$(($srcdst & 0xF0))" src="$(($src >> 4))" opcode=$(printf "0x%x" $opcode) dst=$(printf "BPF_REG_%d" $dst) src=$(printf "BPF_REG_%d" $src) offset=$(printf "%d" $offset) immedi=$(printf "0x%x" $immedi) printf " { %4s, %11s, %11s, (int16_t) %6s, %10s },\n" $opcode $dst $src $offset $immedi done cat << END }; END } generate_head process_relocations process_section generate_tail