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RISC-V: Fix weak function call reloc overflow on llvm build. 

bfd/
	PR 25205
	* elfnn-riscv.c (riscv_elf_relocate_section) <R_RISCV_CALL>: Add
	check for !bfd_link_pic (info).
	<R_RISCV_CALL_PLT>: Move next to R_RISCV_CALL.
	<R_RISCV_JAL>: Add comment.
	(_bfd_riscv_relax_section): For plt.offset check, add check for
	bfd_link_pic (info).  Add comment.

Change-Id: Ie769bc3d5adf096a51df5cc12efe3d50e80acb8f
This commit is contained in:
Jim Wilson 2020-01-06 15:34:50 -08:00
parent 85e290dc12
commit 85f7836470
2 changed files with 16 additions and 3 deletions
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10
bfd/ChangeLog
View File

@ -1,3 +1,13 @@
2020-01-06 Jim Wilson <jimw@sifive.com>
PR 25205
* elfnn-riscv.c (riscv_elf_relocate_section) <R_RISCV_CALL>: Add
check for !bfd_link_pic (info).
<R_RISCV_CALL_PLT>: Move next to R_RISCV_CALL.
<R_RISCV_JAL>: Add comment.
(_bfd_riscv_relax_section): For plt.offset check, add check for
bfd_link_pic (info). Add comment.
2020-01-06 Alan Modra <amodra@gmail.com>
* format.c (bfd_check_format_matches): Ignore bfd_error on target

9
bfd/elfnn-riscv.c
View File

@ -1987,10 +1987,11 @@ riscv_elf_relocate_section (bfd *output_bfd,
break;
case R_RISCV_CALL:
case R_RISCV_CALL_PLT:
/* Handle a call to an undefined weak function. This won't be
relaxed, so we have to handle it here. */
if (h != NULL && h->root.type == bfd_link_hash_undefweak
&& h->plt.offset == MINUS_ONE)
&& (!bfd_link_pic (info) || h->plt.offset == MINUS_ONE))
{
/* We can use x0 as the base register. */
bfd_vma insn = bfd_get_32 (input_bfd,
@ -2003,9 +2004,9 @@ riscv_elf_relocate_section (bfd *output_bfd,
}
/* Fall through. */
case R_RISCV_CALL_PLT:
case R_RISCV_JAL:
case R_RISCV_RVC_JUMP:
/* This line has to match the check in _bfd_riscv_relax_section. */
if (bfd_link_pic (info) && h != NULL && h->plt.offset != MINUS_ONE)
{
/* Refer to the PLT entry. */
@ -4128,7 +4129,9 @@ _bfd_riscv_relax_section (bfd *abfd, asection *sec,
undefined_weak = TRUE;
}
if (h->plt.offset != MINUS_ONE)
/* This line has to match the check in riscv_elf_relocate_section
in the R_RISCV_CALL[_PLT] case. */
if (bfd_link_pic (info) && h->plt.offset != MINUS_ONE)
{
sym_sec = htab->elf.splt;
symval = h->plt.offset;