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[external/binutils.git] / bfd / elfnn-riscv.c

diff --git a/bfd/elfnn-riscv.c b/bfd/elfnn-riscv.c
index 003b4f8..d14c29e 100644 (file)
--- a/bfd/elfnn-riscv.c
+++ b/bfd/elfnn-riscv.c
@@ -1482,9 +1482,21 @@ perform_relocation (const reloc_howto_type *howto,
       break;
 
     case R_RISCV_RVC_LUI:
-      if (!VALID_RVC_LUI_IMM (RISCV_CONST_HIGH_PART (value)))
+      if (RISCV_CONST_HIGH_PART (value) == 0)
+       {
+         /* Linker relaxation can convert an address equal to or greater than
+            0x800 to slightly below 0x800.  C.LUI does not accept zero as a
+            valid immediate.  We can fix this by converting it to a C.LI.  */
+         bfd_vma insn = bfd_get (howto->bitsize, input_bfd,
+                                 contents + rel->r_offset);
+         insn = (insn & ~MATCH_C_LUI) | MATCH_C_LI;
+         bfd_put (howto->bitsize, input_bfd, insn, contents + rel->r_offset);
+         value = ENCODE_RVC_IMM (0);
+       }
+      else if (!VALID_RVC_LUI_IMM (RISCV_CONST_HIGH_PART (value)))
        return bfd_reloc_overflow;
-      value = ENCODE_RVC_LUI_IMM (RISCV_CONST_HIGH_PART (value));
+      else
+       value = ENCODE_RVC_LUI_IMM (RISCV_CONST_HIGH_PART (value));
       break;
 
     case R_RISCV_32:
@@ -3562,11 +3574,16 @@ _bfd_riscv_relax_lui (bfd *abfd,
     }
 
   /* Can we relax LUI to C.LUI?  Alignment might move the section forward;
-     account for this assuming page alignment at worst.  */
+     account for this assuming page alignment at worst. In the presence of 
+     RELRO segment the linker aligns it by one page size, therefore sections
+     after the segment can be moved more than one page. */
+
   if (use_rvc
       && ELFNN_R_TYPE (rel->r_info) == R_RISCV_HI20
       && VALID_RVC_LUI_IMM (RISCV_CONST_HIGH_PART (symval))
-      && VALID_RVC_LUI_IMM (RISCV_CONST_HIGH_PART (symval + ELF_MAXPAGESIZE)))
+      && VALID_RVC_LUI_IMM (RISCV_CONST_HIGH_PART (symval)
+                           + (link_info->relro ? 2 * ELF_MAXPAGESIZE
+                              : ELF_MAXPAGESIZE)))
     {
       /* Replace LUI with C.LUI if legal (i.e., rd != x0 and rd != x2/sp).  */
       bfd_vma lui = bfd_get_32 (abfd, contents + rel->r_offset);