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Refactor - dissolve text section enum #581

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Jul 9, 2024
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Refactor - dissolve text section enum #581

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32 changes: 11 additions & 21 deletions src/elf.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -237,8 +237,10 @@ pub struct Executable<C: ContextObject> {
sbpf_version: SBPFVersion,
/// Read-only section
ro_section: Section,
/// Text section
text_section: Section,
/// Text section virtual address
text_section_vaddr: u64,
/// Text section range in `elf_bytes`
text_section_range: Range<usize>,
/// Address of the entry point
entry_pc: usize,
/// Call resolution map (hash, pc, name)
Expand All @@ -263,16 +265,9 @@ impl<C: ContextObject> Executable<C> {

/// Get the .text section virtual address and bytes
pub fn get_text_bytes(&self) -> (u64, &[u8]) {
let (offset, section) = match &self.text_section {
Section::Owned(_offset, _data) => unreachable!(),
Section::Borrowed(offset, byte_range) => {
(*offset, &self.elf_bytes.as_slice()[byte_range.clone()])
}
};
(
// The offset field is relative to `MM_PROGRAM_START`
ebpf::MM_PROGRAM_START.saturating_add(offset as u64),
section,
self.text_section_vaddr,
&self.elf_bytes.as_slice()[self.text_section_range.clone()],
)
}

Expand All @@ -299,10 +294,7 @@ impl<C: ContextObject> Executable<C> {
/// Get the text section offset in the ELF file
#[cfg(feature = "debugger")]
pub fn get_text_section_offset(&self) -> u64 {
match &self.text_section {
Section::Owned(_offset, _data) => unreachable!(),
Section::Borrowed(_offset, byte_range) => byte_range.start as u64,
}
self.text_section_range.start as u64
}

/// Get the loader built-in program
Expand Down Expand Up @@ -363,7 +355,8 @@ impl<C: ContextObject> Executable<C> {
elf_bytes,
sbpf_version,
ro_section: Section::Borrowed(0, 0..text_bytes.len()),
text_section: Section::Borrowed(0, 0..text_bytes.len()),
text_section_vaddr: ebpf::MM_PROGRAM_START,
text_section_range: 0..text_bytes.len(),
entry_pc,
function_registry,
loader,
Expand Down Expand Up @@ -466,11 +459,8 @@ impl<C: ContextObject> Executable<C> {
elf_bytes,
sbpf_version,
ro_section,
text_section: Section::Borrowed(
// The offset field is relative to `MM_PROGRAM_START`
text_section_vaddr.saturating_sub(ebpf::MM_PROGRAM_START) as usize,
text_section.file_range().unwrap_or_default(),
),
text_section_vaddr,
text_section_range: text_section.file_range().unwrap_or_default(),
entry_pc,
function_registry,
loader,
Expand Down