LibELF: Fix syscall regions for .text segments with a non-zero offset

Previously, we assumed that the `.text` segment was loaded at vaddr 0 in
all dynamic libraries, so we used the dynamic object's base address with
`msyscall`. This did not work with the LLVM toolchain, as it likes to
shuffle these segments around.

This now also handles the case when there are multiple text segments for
some reason correctly.

1 files changed, 5 insertions, 2 deletions

diff --git a/Userland/Libraries/LibELF/DynamicLinker.cpp b/Userland/Libraries/LibELF/DynamicLinker.cpp
index 06eb3425be..cc93fea4ed 100644
--- a/Userland/Libraries/LibELF/DynamicLinker.cpp
+++ b/Userland/Libraries/LibELF/DynamicLinker.cpp
@@ -301,8 +301,11 @@ static Result<NonnullRefPtr<DynamicLoader>, DlErrorMessage> load_main_library(co
         auto& object = result.value();
 
         if (loader.filename() == "libsystem.so"sv) {
-            if (syscall(SC_msyscall, object->base_address().as_ptr())) {
-                VERIFY_NOT_REACHED();
+            VERIFY(!loader.text_segments().is_empty());
+            for (const auto& segment : loader.text_segments()) {
+                if (syscall(SC_msyscall, segment.address().get())) {
+                    VERIFY_NOT_REACHED();
+                }
             }
         }