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use crate::region::{wrap_anonymous, wrap_child};
use vyre_foundation::ir::model::expr::GeneratorRef;
use vyre_foundation::ir::{BufferAccess, BufferDecl, DataType, Expr, Node, Program};
/// Registered op id for GPU ELF container emission.
pub const ELF_LOWERING_OP_ID: &str = "vyre-libs::parsing::opt_lower_elf";
const ELF64_HEADER_WORDS: u32 = 16;
const ELF64_SECTION_HEADER_WORDS: u32 = 16;
const ELF_SECTION_COUNT: u32 = 3;
const TEXT_SECTION_INDEX: u32 = 1;
const SHSTRTAB_SECTION_INDEX: u32 = 2;
const TEXT_SECTION_WORD_OFFSET: u32 =
ELF64_HEADER_WORDS + ELF64_SECTION_HEADER_WORDS * ELF_SECTION_COUNT;
/// Phase 4: ELF64 relocatable container emission.
///
/// Copies already-encoded 32-bit compiler words into a valid ELF64 ET_REL
/// `.text` section and emits the section table plus `.shstrtab` in VRAM.
#[must_use]
pub fn opt_lower_elf(ssa_nodes: &str, target_object_bytes: &str, num_nodes: Expr) -> Program {
let t = Expr::InvocationId { axis: 0 };
let node_count = match &num_nodes {
Expr::LitU32(n) => *n,
_ => 1,
};
let visible_object_words = TEXT_SECTION_WORD_OFFSET
.saturating_add(node_count)
.saturating_add(5)
.min(4096);
let visible_object_bytes = (visible_object_words as usize) * 4;
let loop_body = vec![
Node::let_bind("encoded_word", Expr::load(ssa_nodes, t.clone())),
Node::let_bind(
"write_offset",
Expr::add(Expr::u32(TEXT_SECTION_WORD_OFFSET), t.clone()),
),
Node::store(
target_object_bytes,
Expr::var("write_offset"),
Expr::var("encoded_word"),
),
];
Program::wrapped(
vec![
BufferDecl::storage(ssa_nodes, 0, BufferAccess::ReadOnly, DataType::U32)
.with_count(node_count),
BufferDecl::storage(
target_object_bytes,
1,
BufferAccess::ReadWrite,
DataType::U32,
)
.with_count(4096)
.with_output_byte_range(0..visible_object_bytes),
],
[256, 1, 1],
vec![wrap_anonymous(
ELF_LOWERING_OP_ID,
vec![wrap_child(
vyre_primitives::decode::rle_segment_lengths::OP_ID,
GeneratorRef {
name: ELF_LOWERING_OP_ID.to_string(),
},
vec![
Node::if_then(
Expr::eq(t.clone(), Expr::u32(0)),
vec![
// e_ident (16 bytes)
Node::store(target_object_bytes, Expr::u32(0), Expr::u32(0x464C457F)), // "\x7fELF"
Node::store(target_object_bytes, Expr::u32(1), Expr::u32(0x00010102)), // 64-bit, LSB, SystemV ABI
Node::store(target_object_bytes, Expr::u32(2), Expr::u32(0x00000000)), // Padding
Node::store(target_object_bytes, Expr::u32(3), Expr::u32(0x00000000)), // Padding
// e_type, e_machine, e_version
Node::store(target_object_bytes, Expr::u32(4), Expr::u32(0x003E0001)), // ET_REL (1), EM_X86_64 (62)
Node::store(target_object_bytes, Expr::u32(5), Expr::u32(0x00000001)), // Version 1
// e_entry (8 bytes), e_phoff (8 bytes)
Node::store(target_object_bytes, Expr::u32(6), Expr::u32(0x00000000)),
Node::store(target_object_bytes, Expr::u32(7), Expr::u32(0x00000000)),
Node::store(target_object_bytes, Expr::u32(8), Expr::u32(0x00000000)), // No Program Headers
Node::store(target_object_bytes, Expr::u32(9), Expr::u32(0x00000000)),
// e_shoff (8 bytes) -> Section Header Table immediately follows header (64)
Node::store(target_object_bytes, Expr::u32(10), Expr::u32(0x00000040)),
Node::store(target_object_bytes, Expr::u32(11), Expr::u32(0x00000000)),
// e_flags (4 bytes)
Node::store(target_object_bytes, Expr::u32(12), Expr::u32(0x00000000)),
// e_ehsize (2), e_phentsize (2), e_phnum (2), e_shentsize (2)
Node::store(target_object_bytes, Expr::u32(13), Expr::u32(0x00000040)), // Ehdr size = 64
Node::store(target_object_bytes, Expr::u32(14), Expr::u32(0x00400000)), // Phnum = 0, Shdr size = 64
// e_shnum (2), e_shstrndx (2)
Node::store(
target_object_bytes,
Expr::u32(15),
Expr::u32((SHSTRTAB_SECTION_INDEX << 16) | ELF_SECTION_COUNT),
),
// Section 0: SHT_NULL, all zero.
Node::loop_for(
"null_sh_word",
Expr::u32(0),
Expr::u32(ELF64_SECTION_HEADER_WORDS),
vec![Node::store(
target_object_bytes,
Expr::add(
Expr::u32(ELF64_HEADER_WORDS),
Expr::var("null_sh_word"),
),
Expr::u32(0),
)],
),
// Section 1: .text
Node::store(
target_object_bytes,
Expr::u32(
ELF64_HEADER_WORDS
+ TEXT_SECTION_INDEX * ELF64_SECTION_HEADER_WORDS,
),
Expr::u32(1),
), // sh_name = ".text"
Node::store(
target_object_bytes,
Expr::u32(
ELF64_HEADER_WORDS
+ TEXT_SECTION_INDEX * ELF64_SECTION_HEADER_WORDS
+ 1,
),
Expr::u32(1),
), // SHT_PROGBITS
Node::store(
target_object_bytes,
Expr::u32(
ELF64_HEADER_WORDS
+ TEXT_SECTION_INDEX * ELF64_SECTION_HEADER_WORDS
+ 2,
),
Expr::u32(0x6),
), // SHF_ALLOC | SHF_EXECINSTR
Node::store(
target_object_bytes,
Expr::u32(
ELF64_HEADER_WORDS
+ TEXT_SECTION_INDEX * ELF64_SECTION_HEADER_WORDS
+ 6,
),
Expr::u32(TEXT_SECTION_WORD_OFFSET * 4),
),
Node::store(
target_object_bytes,
Expr::u32(
ELF64_HEADER_WORDS
+ TEXT_SECTION_INDEX * ELF64_SECTION_HEADER_WORDS
+ 8,
),
Expr::u32(node_count * 4),
),
Node::store(
target_object_bytes,
Expr::u32(
ELF64_HEADER_WORDS
+ TEXT_SECTION_INDEX * ELF64_SECTION_HEADER_WORDS
+ 12,
),
Expr::u32(4),
),
// Section 2: .shstrtab
Node::store(
target_object_bytes,
Expr::u32(
ELF64_HEADER_WORDS
+ SHSTRTAB_SECTION_INDEX * ELF64_SECTION_HEADER_WORDS,
),
Expr::u32(7),
), // sh_name = ".shstrtab"
Node::store(
target_object_bytes,
Expr::u32(
ELF64_HEADER_WORDS
+ SHSTRTAB_SECTION_INDEX * ELF64_SECTION_HEADER_WORDS
+ 1,
),
Expr::u32(3),
), // SHT_STRTAB
Node::store(
target_object_bytes,
Expr::u32(
ELF64_HEADER_WORDS
+ SHSTRTAB_SECTION_INDEX * ELF64_SECTION_HEADER_WORDS
+ 6,
),
Expr::u32((TEXT_SECTION_WORD_OFFSET + node_count) * 4),
),
Node::store(
target_object_bytes,
Expr::u32(
ELF64_HEADER_WORDS
+ SHSTRTAB_SECTION_INDEX * ELF64_SECTION_HEADER_WORDS
+ 8,
),
Expr::u32(17),
),
Node::store(
target_object_bytes,
Expr::u32(
ELF64_HEADER_WORDS
+ SHSTRTAB_SECTION_INDEX * ELF64_SECTION_HEADER_WORDS
+ 12,
),
Expr::u32(1),
),
Node::store(
target_object_bytes,
Expr::u32(TEXT_SECTION_WORD_OFFSET + node_count),
Expr::u32(0x65742E00),
), // "\0.te"
Node::store(
target_object_bytes,
Expr::u32(TEXT_SECTION_WORD_OFFSET + node_count + 1),
Expr::u32(0x2E007478),
), // "xt\0."
Node::store(
target_object_bytes,
Expr::u32(TEXT_SECTION_WORD_OFFSET + node_count + 2),
Expr::u32(0x74736873),
), // "shst"
Node::store(
target_object_bytes,
Expr::u32(TEXT_SECTION_WORD_OFFSET + node_count + 3),
Expr::u32(0x62617472),
), // "rtab"
Node::store(
target_object_bytes,
Expr::u32(TEXT_SECTION_WORD_OFFSET + node_count + 4),
Expr::u32(0),
),
],
),
Node::if_then(Expr::lt(t.clone(), num_nodes), loop_body),
],
)],
)],
)
}
inventory::submit! {
crate::harness::OpEntry {
id: ELF_LOWERING_OP_ID,
build: || opt_lower_elf("ssa", "obj", Expr::u32(4)),
// Small deterministic fixture: 4 encoded words and a 4096-word object buffer.
test_inputs: Some(|| vec![vec![
vyre_primitives::wire::pack_u32_slice(&[
0xC0DE_0001u32,
0xC0DE_0002,
0xC0DE_0003,
0xC0DE_0004,
]),
vec![0u8; 4_096 * 4],
]]),
expected_output: Some(|| {
let to_bytes = vyre_primitives::wire::pack_u32_slice;
let mut obj = vec![0u32; 4096];
obj[0] = 0x464C_457F;
obj[1] = 0x0001_0102;
obj[4] = 0x003E_0001;
obj[5] = 0x0000_0001;
obj[10] = 0x0000_0040;
obj[13] = 0x0000_0040;
obj[14] = 0x0040_0000;
obj[15] = 0x0002_0003;
obj[32] = 1;
obj[33] = 1;
obj[34] = 0x6;
obj[38] = TEXT_SECTION_WORD_OFFSET * 4;
obj[40] = 16;
obj[44] = 4;
obj[48] = 7;
obj[49] = 3;
obj[54] = (TEXT_SECTION_WORD_OFFSET + 4) * 4;
obj[56] = 17;
obj[60] = 1;
obj[64] = 0xC0DE_0001;
obj[65] = 0xC0DE_0002;
obj[66] = 0xC0DE_0003;
obj[67] = 0xC0DE_0004;
obj[68] = 0x6574_2E00;
obj[69] = 0x2E00_7478;
obj[70] = 0x7473_6873;
obj[71] = 0x6261_7472;
obj.truncate((TEXT_SECTION_WORD_OFFSET + 4 + 5) as usize);
vec![vec![to_bytes(&obj)]]
}),
category: Some("compiler"),
}
}