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2009-08-05 Chao-ying Fu <fu@mips.com>

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* elf32-mips.c (mips_reloc_map): Add BFD_RELOC_MIPS_JALR.
	* elfxx-mips.c (JAL_TO_BAL_P): New define to transform JAL to BAL
	for CPUs.  It is true for RM9000.
	(JALR_TO_BAL_P): New define to transform JALR to BAL.  It is true
	for all CPUs.
	(mips_elf_perform_relocation): Use JAL_TO_BAL_P and JALR_TO_BAL_P
	to guard the transformation.
This commit is contained in:
Chao-ying Fu 2009-08-05 21:17:51 +00:00
parent ef15dade89
commit cd8d5a82a2
3 changed files with 30 additions and 8 deletions
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10
bfd/ChangeLog
View File

@ -1,3 +1,13 @@
2009-08-05 Chao-ying Fu <fu@mips.com>
* elf32-mips.c (mips_reloc_map): Add BFD_RELOC_MIPS_JALR.
* elfxx-mips.c (JAL_TO_BAL_P): New define to transform JAL to BAL
for CPUs. It is true for RM9000.
(JALR_TO_BAL_P): New define to transform JALR to BAL. It is true
for all CPUs.
(mips_elf_perform_relocation): Use JAL_TO_BAL_P and JALR_TO_BAL_P
to guard the transformation.
2009-08-05 Trevor Smigiel <Trevor_Smigiel@playstation.sony.com>
* elf32-spu.h (spu_elf_params): Add member emit_fixups.

1
bfd/elf32-mips.c
View File

@ -1261,6 +1261,7 @@ static const struct elf_reloc_map mips_reloc_map[] =
{ BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE },
{ BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST },
{ BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP },
{ BFD_RELOC_MIPS_JALR, R_MIPS_JALR },
{ BFD_RELOC_MIPS_TLS_DTPMOD32, R_MIPS_TLS_DTPMOD32 },
{ BFD_RELOC_MIPS_TLS_DTPREL32, R_MIPS_TLS_DTPREL32 },
{ BFD_RELOC_MIPS_TLS_DTPMOD64, R_MIPS_TLS_DTPMOD64 },

27
bfd/elfxx-mips.c
View File

@ -668,6 +668,17 @@ static bfd *reldyn_sorting_bfd;
( ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) != E_MIPS_ARCH_1) \
|| ((elf_elfheader (abfd)->e_flags & EF_MIPS_MACH) == E_MIPS_MACH_3900))
/* True if ABFD is for CPUs that are faster if JAL is converted to BAL.
This should be safe for all architectures. We enable this predicate
for RM9000 for now. */
#define JAL_TO_BAL_P(abfd) \
((elf_elfheader (abfd)->e_flags & EF_MIPS_MACH) == E_MIPS_MACH_9000)
/* True if ABFD is for CPUs that are faster if JALR is converted to BAL.
This should be safe for all architectures. We enable this predicate for
all CPUs. */
#define JALR_TO_BAL_P(abfd) 1
/* True if ABFD is a PIC object. */
#define PIC_OBJECT_P(abfd) \
((elf_elfheader (abfd)->e_flags & EF_MIPS_PIC) != 0)
@ -5586,15 +5597,15 @@ mips_elf_perform_relocation (struct bfd_link_info *info,
x = (x & ~(0x3f << 26)) | (jalx_opcode << 26);
}
/* On the RM9000, bal is faster than jal, because bal uses branch
prediction hardware. If we are linking for the RM9000, and we
see jal, and bal fits, use it instead. Note that this
transformation should be safe for all architectures. */
if (bfd_get_mach (input_bfd) == bfd_mach_mips9000
&& !info->relocatable
/* Try converting JAL and JALR to BAL, if the target is in range. */
if (!info->relocatable
&& !require_jalx
&& ((r_type == R_MIPS_26 && (x >> 26) == 0x3) /* jal addr */
|| (r_type == R_MIPS_JALR && x == 0x0320f809))) /* jalr t9 */
&& ((JAL_TO_BAL_P (input_bfd)
&& r_type == R_MIPS_26
&& (x >> 26) == 0x3) /* jal addr */
|| (JALR_TO_BAL_P (input_bfd)
&& r_type == R_MIPS_JALR
&& x == 0x0320f809))) /* jalr t9 */
{
bfd_vma addr;
bfd_vma dest;