loading dols

2026-05-12 10:44:44 +02:00
parent 5f1e3aa095
commit 0b1d14bcd5
9 changed files with 163 additions and 42 deletions
@@ -0,0 +1,48 @@
+#include <loaders/elf.hpp>
+#include <mem.hpp>
+#include <elfio/elfio.hpp>
+#include <print>
+
+namespace weee::core {
+bool load_elf(const std::string &path, mem &mem) {
+    ELFIO::elfio reader;
+    if (!reader.load(path))
+        return false;
+
+    size_t sanity_bss_check_count = 0;
+
+    for (const auto &segment : reader.segments) {
+        const auto segment_type = segment->get_type();
+        if (segment_type != ELFIO::PT_LOAD && segment_type != ELFIO::PT_TLS && segment_type != ELFIO::PT_NOTE)
+            continue;
+
+        if (segment->get_memory_size() == 0)
+            continue;
+
+        const bool exc = segment->get_flags() & ELFIO::PF_X;
+        const bool rd = segment->get_flags() & ELFIO::PF_R;
+        const bool wr = segment->get_flags() & ELFIO::PF_W;
+
+        std::println("Segment {} {}{}{} @ 0x{:08X} -> 0x{:08X}", segment->get_index(), rd ? 'R' : '_', wr ? 'W' : '_',
+                     exc ? 'X' : '_', segment->get_virtual_address(),
+                     segment->get_virtual_address() + segment->get_memory_size() - 1);
+
+        if (segment->get_file_size() == 0) {
+            sanity_bss_check_count++;
+            if (sanity_bss_check_count > 1) {
+                std::println("weee does not support multiple .bss segments");
+                return -2;
+            }
+
+            // .bss we zero out
+            mem.set(0, segment->get_memory_size(), segment->get_virtual_address() & 0x0FFFFFFF);
+            continue;
+        }
+
+        mem.copy((const ircolib::u8 *)segment->get_data(), segment->get_file_size(),
+                 segment->get_virtual_address() & 0x0FFFFFFF);
+    }
+
+    return true;
+}
+} // namespace weee::core