bfd: RISC-V: relax to gp in more cases.

bfd/ChangeLog:

2017-02-24  Andrew Waterman  <andrew@sifive.com>

	* elfnn-riscv.c (GP_NAME): New macro.
	(riscv_global_pointer_value): Use it.
	(_bfd_riscv_relax_lui): If symbol and global pointer are in same
	output section, consider only that section's alignment.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 7435d5abdcf6a4414e64c54a4d4817009f105e1e..7eda9630c903a2a7b0427ee3b43208e5eceb62ad 100644 (file)
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,10 @@
+2017-02-24  Andrew Waterman  <andrew@sifive.com>
+
+       * elfnn-riscv.c (GP_NAME): New macro.
+       (riscv_global_pointer_value): Use it.
+       (_bfd_riscv_relax_lui): If symbol and global pointer are in same
+       output section, consider only that section's alignment.
+
 2017-02-23  Maciej W. Rozycki  <macro@imgtec.com>
 
        * elfxx-mips.h (_bfd_mips_relax_section): Remove prototype.

diff --git a/bfd/elfnn-riscv.c b/bfd/elfnn-riscv.c
index 6c14313310ac6acb52f285673f4b03fbbd09e18f..2ccfc5f08fba79e62b10e6fbe934ee311f66e6c6 100644 (file)
--- a/bfd/elfnn-riscv.c
+++ b/bfd/elfnn-riscv.c
@@ -52,6 +52,10 @@
 #define ELF_MAXPAGESIZE                        0x1000
 #define ELF_COMMONPAGESIZE             0x1000
 
+/* The global pointer's symbol name.  */
+
+#define GP_NAME "__global_pointer$"
+
 /* The RISC-V linker needs to keep track of the number of relocs that it
    decides to copy as dynamic relocs in check_relocs for each symbol.
    This is so that it can later discard them if they are found to be
@@ -1463,7 +1467,7 @@ riscv_global_pointer_value (struct bfd_link_info *info)
 {
   struct bfd_link_hash_entry *h;
 
-  h = bfd_link_hash_lookup (info->hash, "__global_pointer$", FALSE, FALSE, TRUE);
+  h = bfd_link_hash_lookup (info->hash, GP_NAME, FALSE, FALSE, TRUE);
   if (h == NULL || h->type != bfd_link_hash_defined)
     return 0;
 
@@ -2809,6 +2813,16 @@ _bfd_riscv_relax_lui (bfd *abfd,
 
   BFD_ASSERT (rel->r_offset + 4 <= sec->size);
 
+  if (gp)
+    {
+      /* If gp and the symbol are in the same output section, then
+        consider only that section's alignment.  */
+      struct bfd_link_hash_entry *h =
+       bfd_link_hash_lookup (link_info->hash, GP_NAME, FALSE, FALSE, TRUE);
+      if (h->u.def.section->output_section == sym_sec->output_section)
+       max_alignment = (bfd_vma) 1 << sym_sec->output_section->alignment_power;
+    }
+
   /* Is the reference in range of x0 or gp?
      Valid gp range conservatively because of alignment issue.  */
   if (VALID_ITYPE_IMM (symval)