Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/library/std/src/sys/sgx/abi/reloc.rs b/library/std/src/sys/sgx/abi/reloc.rs
new file mode 100644
index 000000000..02dff0ad2
--- /dev/null
+++ b/library/std/src/sys/sgx/abi/reloc.rs
@@ -0,0 +1,32 @@
+use super::mem;
+use crate::slice::from_raw_parts;
+
+const R_X86_64_RELATIVE: u32 = 8;
+
+#[repr(packed)]
+struct Rela<T> {
+    offset: T,
+    info: T,
+    addend: T,
+}
+
+pub fn relocate_elf_rela() {
+    extern "C" {
+        static RELA: u64;
+        static RELACOUNT: usize;
+    }
+
+    if unsafe { RELACOUNT } == 0 {
+        return;
+    } // unsafe ok: link-time constant
+
+    let relas = unsafe {
+        from_raw_parts::<Rela<u64>>(mem::rel_ptr(RELA), RELACOUNT) // unsafe ok: link-time constant
+    };
+    for rela in relas {
+        if rela.info != (/*0 << 32 |*/R_X86_64_RELATIVE as u64) {
+            rtabort!("Invalid relocation");
+        }
+        unsafe { *mem::rel_ptr_mut::<*const ()>(rela.offset) = mem::rel_ptr(rela.addend) };
+    }
+}