1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136

use super::{Contents32, Contents64, Section32, Section64, Shdr32, Shdr64, Type};

#[derive(Debug, Clone)]
pub(crate) struct Section {
    pub name: String,
    pub header: Shdr,

    pub contents: Contents,
}

#[derive(Debug, Clone)]
pub(crate) enum Shdr {
    Shdr64(Shdr64),
    Shdr32(Shdr32),
}

#[derive(Debug, Clone)]
pub(crate) enum Contents {
    Contents64(Contents64),
    Contents32(Contents32),
}

#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct StrTabEntry {
    pub v: String,
    pub idx: usize,
}

impl Section {
    pub fn new(hdr: Shdr) -> Self {
        let is_64bit = matches!(hdr, Shdr::Shdr64(_));
        Self {
            name: Default::default(),
            contents: if is_64bit {
                Contents::Contents64(Contents64::Raw(Default::default()))
            } else {
                Contents::Contents32(Contents32::Raw(Default::default()))
            },
            header: hdr,
        }
    }

    pub fn as_64bit(&self) -> Section64 {
        Section64 {
            name: self.name.clone(),
            contents: self.contents.as_64bit(),
            header: self.header.as_64bit(),
        }
    }
    pub fn as_32bit(&self) -> Section32 {
        Section32 {
            name: self.name.clone(),
            contents: self.contents.as_32bit(),
            header: self.header.as_32bit(),
        }
    }

    pub fn ty(&self) -> Type {
        match self.header {
            Shdr::Shdr32(shdr) => shdr.get_type(),
            Shdr::Shdr64(shdr) => shdr.get_type(),
        }
    }
    pub fn name_idx(&self) -> usize {
        match self.header {
            Shdr::Shdr32(shdr) => shdr.sh_name as usize,
            Shdr::Shdr64(shdr) => shdr.sh_name as usize,
        }
    }
    pub fn offset(&self) -> usize {
        match self.header {
            Shdr::Shdr32(shdr) => shdr.sh_offset as usize,
            Shdr::Shdr64(shdr) => shdr.sh_offset as usize,
        }
    }
    pub fn size(&self) -> usize {
        match self.header {
            Shdr::Shdr32(shdr) => shdr.sh_size as usize,
            Shdr::Shdr64(shdr) => shdr.sh_size as usize,
        }
    }
    pub fn entry_size(&self) -> usize {
        match self.header {
            Shdr::Shdr32(shdr) => shdr.sh_entsize as usize,
            Shdr::Shdr64(shdr) => shdr.sh_entsize as usize,
        }
    }
    pub fn link(&self) -> usize {
        match self.header {
            Shdr::Shdr32(shdr) => shdr.sh_link as usize,
            Shdr::Shdr64(shdr) => shdr.sh_link as usize,
        }
    }
}

impl Contents {
    pub fn as_64bit(&self) -> Contents64 {
        match self {
            Contents::Contents64(contents) => contents.clone(),
            _ => unreachable!(),
        }
    }
    pub fn as_32bit(&self) -> Contents32 {
        match self {
            Contents::Contents32(contents) => contents.clone(),
            _ => unreachable!(),
        }
    }
    pub fn as_strtab(&self) -> Vec<StrTabEntry> {
        match self {
            Contents::Contents32(contents) => match contents {
                Contents32::StrTab(v) => v.clone(),
                _ => unreachable!(),
            },
            Contents::Contents64(contents) => match contents {
                Contents64::StrTab(v) => v.clone(),
                _ => unreachable!(),
            },
        }
    }
}

impl Shdr {
    pub fn as_64bit(&self) -> Shdr64 {
        match self {
            Self::Shdr64(shdr) => *shdr,
            _ => unreachable!(),
        }
    }
    pub fn as_32bit(&self) -> Shdr32 {
        match self {
            Self::Shdr32(shdr) => *shdr,
            _ => unreachable!(),
        }
    }
}