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build/elf: add Builder
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The Builder can be created from an existing ELF file, modified,
and then written out again.

Also replace the elfcopy example with a rewrite example that
uses Builder, and add some more options.
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philipc committed Feb 20, 2024
1 parent 09d8d57 commit 7fdc88b
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Showing 27 changed files with 16,190 additions and 1,225 deletions.
7 changes: 6 additions & 1 deletion .github/workflows/rust.yml
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,10 @@ jobs:
run: |
rustup install ${{matrix.rust_channel}}
rustup default ${{matrix.rust_channel}}
- name: Check
run: |
cargo check --all-targets --features all
cargo check --all-targets -p object-rewrite
- name: Test debug
run: |
cargo test --verbose --features all
Expand All @@ -39,8 +43,9 @@ jobs:
submodules: true
- run: cargo test --no-default-features --features read
- run: cargo test --no-default-features --features write
- run: cargo test --no-default-features --features build
- run: cargo test --no-default-features --features read_core,write_core,coff
- run: cargo test --no-default-features --features read_core,write_core,elf
- run: cargo test --no-default-features --features build_core,elf
- run: cargo test --no-default-features --features read_core,write_core,macho
- run: cargo test --no-default-features --features read_core,write_core,pe
- run: cargo test --no-default-features --features read_core,wasm
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10 changes: 7 additions & 3 deletions Cargo.toml
Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,10 @@ write_core = ["dep:crc32fast", "dep:indexmap", "dep:hashbrown"]
write_std = ["write_core", "std", "indexmap?/std", "crc32fast?/std"]
# Write support for all file formats, including libstd features.
write = ["write_std", "coff", "elf", "macho", "pe", "xcoff"]
# Core builder support. You will need to enable some file formats too.
build_core = ["read_core", "write_core"]
# Builder support for all file formats.
build = ["build_core", "write_std", "elf"]

#=======================================
# Misc features.
Expand Down Expand Up @@ -75,7 +79,7 @@ default = ["read", "compression"]
#=======================================
# Umbrella feature for enabling all user-facing features of this crate. Does not
# enable internal features like `rustc-dep-of-std`.
all = ["read", "write", "std", "compression", "wasm"]
all = ["read", "write", "build", "std", "compression", "wasm"]

# Use of --all-features is not supported.
# This is a dummy feature to detect when --all-features is used.
Expand All @@ -84,7 +88,7 @@ cargo-all = []
#=======================================
# Documentation should be generated with everything in "all" except for "unaligned".
doc = [
"read_core", "write_std",
"read_core", "write_std", "build_core",
"std", "compression",
"archive", "coff", "elf", "macho", "pe", "wasm", "xcoff",
]
Expand All @@ -100,6 +104,6 @@ unstable-all = ["all", "unstable"]
rustc-dep-of-std = ['core', 'compiler_builtins', 'alloc', 'memchr/rustc-dep-of-std']

[workspace]
members = ["crates/examples"]
members = ["crates/*"]
default-members = [".", "crates/examples"]
resolver = "2"
4 changes: 0 additions & 4 deletions crates/examples/Cargo.toml
Original file line number Diff line number Diff line change
Expand Up @@ -28,10 +28,6 @@ required-features = ["object/read_core", "object/archive"]
name = "dyldcachedump"
required-features = ["object/read"]

[[bin]]
name = "elfcopy"
required-features = ["object/read_core", "object/write_core", "object/elf", "object/std"]

[[bin]]
name = "elftoefi"
required-features = ["object/read_core", "object/write_core", "object/elf", "object/pe", "object/std"]
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