gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/pkg/sentry/platform/systrap/sysmsg/gen_offsets_go.sh (about)

     1  # Copyright 2020 The gVisor Authors.
     2  #
     3  # Licensed under the Apache License, Version 2.0 (the "License");
     4  # you may not use this file except in compliance with the License.
     5  # You may obtain a copy of the License at
     6  #
     7  #     http://www.apache.org/licenses/LICENSE-2.0
     8  #
     9  # Unless required by applicable law or agreed to in writing, software
    10  # distributed under the License is distributed on an "AS IS" BASIS,
    11  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  # See the License for the specific language governing permissions and
    13  # limitations under the License.
    14  
    15  # This script generates a golang file which contains:
    16  #   * byte array with the sysmsg stub binary blob.
    17  #   * set of variables with addresses of exported symbols.
    18  
    19  #!/bin/bash
    20  
    21  set -e
    22  set -u
    23  
    24  FILE=$1
    25  NAME=$2
    26  
    27  PREFIX=${NAME}_blob_offset__
    28  BLOB=${NAME}_blob
    29  OBJNAME=$3
    30  
    31  AWK_CMD='$2 ~ /^[tBCTA]$/ { print "var '$PREFIX'" $3 " = 0x" $1 }'
    32  
    33  cat << EOF
    34  /* Autogenerated by $0, do not edit */
    35  package sysmsg
    36  
    37  EOF
    38  
    39  nm "$OBJNAME" | grep "__export_" | tr . _ | awk "$AWK_CMD"