1 files changed, 115 insertions, 0 deletions
diff --git a/ldso/ldso/csky/dl-startup.h b/ldso/ldso/csky/dl-startup.h
new file mode 100644
index 000000000..0a74ab69f
--- /dev/null
+++ b/ldso/ldso/csky/dl-startup.h
@@ -0,0 +1,115 @@
+#ifdef __CSKYABIV2__
+
+__asm__ (
+    "    .text\n\t"
+    "    .globl _start\n\t"
+    "_start:\n\t"
+    "    mov a0, sp\n\t"
+    "    bsr _dl_start\n\t"
+    "    # Return from _dl_start, user entry point address in a0 \n\t"
+    "    # the code is PIC, so get global offset table\n\t"
+    "    grs gb,.Lgetpc1\n\t"
+    ".Lgetpc1:\n\t    "
+    "    lrw t0, .Lgetpc1@GOTPC\n\t"
+    "    add gb, gb,t0\n\t"
+    "    lrw r5, _dl_skip_args@GOT\n\t"
+    "    ldr.w r5, (gb, r5 << 0)\n\t"
+    "    # get the value of variable _dl_skip_args in r6\n\t"
+    "    ldw r6, (r5, 0)\n\t"
+    "    # get the argc in r7 \n\t"
+    "    ldw r7, (sp, 0)\n\t"
+    "    # adjust the argc, this may be a bug when _dl_skip_args > argc\n\t"
+    "    rsub r6, r7\n\t"
+    "    # adjust the stack\n\t"
+    "    mov r7, r6\n\t"
+    "    lsli r6, 2\n\t"
+    "    # adjust the stack pointer,this may be a bug, "
+    "    # because it must be 8 bytes align"
+    "    addu sp, r6\n\t"
+    "    stw  r7, (sp, 0)\n\t"
+    "    lrw  r7, _dl_fini@GOTOFF\n\t"
+    "    addu  r7, gb\n\t"
+    "    jmp a0"
+);
+#else
+__asm__ (
+    "    .text\n\t"
+    "    .globl _start\n\t"
+    "_start:\n\t"
+    "    mov r2, r0\n\t"
+# if defined(__ck810__)
+    "    bsr _dl_start\n\t"
+#else
+    "    # the code is PIC, so get global offset table\n\t"
+    "    bsr .Lgetpc0\n\t"
+    ".Lgetpc0:\n\t    "
+    "    lrw r14, .Lgetpc0@GOTPC\n\t"
+    "    add r14, r15\n\t"
+    "    lrw r4, _dl_start@GOTOFF\n\t"
+    "    add r4, r14\n\t"
+    "    jsr r4\n\t"
+#endif
+    "    # Return from _dl_start, user entry point address in r2 \n\t"
+    "    # the code is PIC, so get global offset table\n\t"
+    "    bsr .Lgetpc1\n\t"
+    ".Lgetpc1:\n\t    "
+    "    lrw r3, .Lgetpc1@GOTPC\n\t"
+    "    add r3, r15\n\t"
+# if defined(__ck810__)
+    "    ldw r5, (r3, _dl_skip_args@GOT)\n\t"
+#else
+    "    lrw r4, _dl_skip_args@GOT\n\t"
+    "    add r4, r3\n\t"
+    "    ldw r5, (r4, 0)\n\t"
+#endif
+    "    # get the value of variable _dl_skip_args in r6\n\t"
+    "    ldw r6, (r5, 0)\n\t"
+    "    # get the argc in r7 \n\t"
+    "    ldw r7, (r0, 0)\n\t"
+    "    # adjust the argc, this may be a bug when _dl_skip_args > argc\n\t"
+    "    rsub r6, r7\n\t"
+    "    # adjust the stack\n\t"
+    "    mov r7, r6\n\t"
+    "    lsli r6, 2\n\t"
+    "    # adjust the stack pointer,this may be a bug, "
+    "    # because it must be 8 bytes align"
+    "    addu r0, r6\n\t"
+    "    stw  r7, (r0, 0)\n\t"
+    "    lrw  r7, _dl_fini@GOTOFF\n\t"
+    "    addu  r7, r3\n\t"
+    "    jmp r2"
+);
+
+#endif
+
+/* Get a pointer to the argv array. */
+#define GET_ARGV(ARGVP, ARGS) ARGVP = (((unsigned long*)ARGS)+1)
+
+/* Function calls are not safe until the GOT relocations have been done.  */
+#define NO_FUNCS_BEFORE_BOOTSTRAP
+/* Handle relocation of the symbols in the dynamic loader. */
+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 (ELF32_R_TYPE(rpnt->r_info))
+    {
+       case R_CKCORE_RELATIVE:
+            *reloc_addr = load_addr + rpnt->r_addend;
+            break;
+        case R_CKCORE_GLOB_DAT:
+        case R_CKCORE_JUMP_SLOT:
+            *reloc_addr = symbol_addr;
+            break;
+        case R_CKCORE_ADDR32:
+            *reloc_addr = symbol_addr + rpnt->r_addend;
+            break;
+        case R_CKCORE_NONE:
+            break;
+
+        default:
+            _dl_exit(1);
+    }
+}
+
+