1 files changed, 63 insertions, 0 deletions
diff --git a/ldso/ldso/metag/dl-startup.h b/ldso/ldso/metag/dl-startup.h
new file mode 100644
index 000000000..8dbf747e1
--- /dev/null
+++ b/ldso/ldso/metag/dl-startup.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2013 Imagination Technologies Ltd.
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+/*
+ * This code fixes the stack pointer so that the dynamic linker
+ * can find argc, argv and auxvt (Auxillary Vector Table).
+ */
+
+__asm__ (
+"       .text\n"
+"       .global __start\n"
+"       .type   __start,@function\n"
+"	.hidden __start\n"
+"_start:\n"
+"__start:\n"
+"       MSETL   [A0StP++],D0Ar4,D0Ar2\n"
+"       MOV     D1Ar1,D0Ar2\n"
+"       CALLR   D1RtP,__dl_start\n"
+"       GETL    D0Ar2,D1Ar1,[A0StP+#-(1*8)]\n"
+"       GETL    D0Ar4,D1Ar3,[A0StP+#-(2*8)]\n"
+"       SUB     A0StP,A0StP,#(2*8)\n"
+"       MOV     PC,D0Re0\n"
+"       .size __start,.-__start\n"
+"       .previous\n"
+);
+
+
+/*
+ * Get a pointer to the argv array.  On many platforms this can be just
+ * the address if 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))
+
+
+/* Handle relocation of the symbols in the dynamic loader. */
+static inline
+void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, unsigned long *reloc_addr,
+	unsigned long symbol_addr, unsigned long load_addr, Elf32_Sym *symtab)
+{
+	switch (ELF32_R_TYPE(rpnt->r_info)) {
+		case R_METAG_GLOB_DAT:
+		case R_METAG_JMP_SLOT:
+		case R_METAG_ADDR32:
+			*reloc_addr = symbol_addr;
+			break;
+		case R_METAG_RELATIVE:
+			*reloc_addr = load_addr + rpnt->r_addend;
+			break;
+		case R_METAG_RELBRANCH:
+			*reloc_addr = symbol_addr + rpnt->r_addend - *reloc_addr - 4;
+			break;
+		case R_METAG_NONE:
+			break;
+		default:
+			_dl_exit(1);
+			break;
+	}
+}