nios2: sync support with glibc

Only static linking is supported for now.
More debugging and analyzing for ld.so, TLS and NPTL
is required. But at least you can bootup a static
root fileystem in Qemu.

1 files changed, 34 insertions, 0 deletions

diff --git a/ldso/ldso/nios2/dl-startup.h b/ldso/ldso/nios2/dl-startup.h
new file mode 100644
index 000000000..982e55532
--- /dev/null
+++ b/ldso/ldso/nios2/dl-startup.h
@@ -0,0 +1,34 @@
+__asm__ ("\
+	.text\n\
+	.globl _start\n\
+	.type _start, %function\n\
+_start:\n\
+        mov r4, sp\n\
+        br _dl_start\n\
+	mov r16, r4\n\
+        jmp r16\n\
+");
+
+/*
+ * Get a pointer to the argv array.  On many platforms this can be just
+ * the address of the first argument, on other platforms we need to
+ * do something a little more subtle here.
+ */
+#define GET_ARGV(ARGVP, ARGS) ARGVP = (((unsigned long*) ARGS)+1)
+
+/* The ld.so library requires relocations */
+#define ARCH_NEEDS_BOOTSTRAP_RELOCS
+
+static __always_inline
+void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, unsigned long *reloc_addr,
+	unsigned long symbol_addr, unsigned long load_addr, attribute_unused Elf32_Sym *symtab)
+{
+	switch (ELF_R_TYPE(rpnt->r_info)) {
+		case R_NIOS2_RELATIVE:
+			*reloc_addr = load_addr + rpnt->r_addend;
+			break;
+		default:
+			_dl_exit(1);
+			break;
+	}
+}