tiny.tldr.formats.elf.addressing.target

1pub const target = @import("target.zig");

1const std = @import("std");2const root = @import("../../../root.zig");3const elf = @import("../root.zig");4const cache = @import("cache.zig");5const size = @import("size.zig");6const symbol = @import("symbol.zig");78const model = root.model;9const format = elf.format;10const layout = elf.layout;11const merge = elf.merge;1213const Access = cache.Access;14const Cache = cache.Cache;15const GlobalSymbol = layout.GlobalSymbol;16const ObjectFile = elf.parser.ObjectFile;17const ObjectLayout = layout.ObjectLayout;18const OutputSection = layout.OutputSection;19const Rela = format.Rela;2021pub const Target = struct {22    address: i128,23    addend: i64,24    size: u64,25};2627pub fn relocation(28    comptime cache_access: Access,29    objects: []const ObjectFile,30    layouts: []const ObjectLayout,31    output_sections: []const OutputSection,32    globals: *const std.StringHashMapUnmanaged(GlobalSymbol),33    symbol_addresses: *Cache,34    object_index: usize,35    symbol_index: usize,36    relocation_record: Rela,37    needs_size: bool,38) model.Error!Target {39    const object = objects[object_index];40    if (symbol_index >= object.symbols.len) return error.UndefinedSymbol;4142    if (needs_size) {43        return .{44            .address = 0,45            .addend = relocation_record.addend,46            .size = try size.symbol(objects, globals, object_index, symbol_index),47        };48    }4950    const symbol_record = object.symbols[symbol_index];51    if (symbol_record.isSection()) {52        if (relocation_record.addend >= 0) {53            const offset: u64 = @intCast(relocation_record.addend);54            if (merge.address(layouts[object_index], object, output_sections, symbol_record.section_index, offset)) |resolved| {55                return .{ .address = resolved, .addend = 0, .size = 0 };56            }57        }58        return .{59            .address = @intCast(try symbol.sectionSymbolAddress(cache_access, objects, layouts, output_sections, symbol_addresses, object_index, symbol_index, symbol_record)),60            .addend = relocation_record.addend,61            .size = 0,62        };63    }6465    return .{66        .address = try symbol.relocation(cache_access, objects, layouts, output_sections, globals, symbol_addresses, object_index, symbol_index),67        .addend = relocation_record.addend,68        .size = 0,69    };70}