upgrade to latest rocket-chip

tests/link.ld

@@ -12,6 +12,7 @@
    specifically one of the entires in bfd/cpu-mips.c */
 
 OUTPUT_ARCH( "riscv" )
+ENTRY(_start)
 
 /*----------------------------------------------------------------------*/
 /* Sections                                                             */
@@ -22,7 +23,7 @@ SECTIONS
 
   /* text: test code section */
   . = 0x80000000;
-  .text.init : { crt.o(.text) }
+  .text.init : { *(.text.init) }
 
   .tohost ALIGN(0x1000) : { *(.tohost) }
 
@@ -32,7 +33,7 @@ SECTIONS
   .data : { *(.data) }
 
   .sdata : {
-    _gp = . + 0x800;
+    __global_pointer$ = . + 0x800;
     *(.srodata.cst16) *(.srodata.cst8) *(.srodata.cst4) *(.srodata.cst2) *(.srodata*)
     *(.sdata .sdata.* .gnu.linkonce.s.*)
   }
@@ -48,14 +49,14 @@ SECTIONS
   .tdata :
   {
     _tls_data = .;
-    crt.o(.tdata.begin)
+    *(.tdata.begin)
     *(.tdata)
-    crt.o(.tdata.end)
+    *(.tdata.end)
   }
   .tbss :
   {
     *(.tbss)
-    crt.o(.tbss.end)
+    *(.tbss.end)
   }
 
   /* End of uninitalized data segement */