binutils-gdb/ld/testsuite/ld-mips-elf/pic-reloc-lui.s

	.text
	.globl	foo
	.ent	foo
foo:
	lui	$2, %hi(bar)
	addiu	$2, %lo(bar)
	lui	$2, %hi(bar)
	addiu	$2, %lo(bar)
	.end	foo

# Force some (non-delay-slot) zero bytes, to make 'objdump' print ...
	.align	4, 0
	.space	16
MIPS/LD: Accept high-part relocations in PIC code with absolute symbols Accept R_MIPS_HI16, R_MIPS_HIGHER and R_MIPS_HIGHEST relocations and their compressed counterparts in PIC code where the symbol referred is absolute. Such an operation is meaningful, because an absolute symbol effectively is a constant the calculation of the value of which has been deferred to the static link time, and which is not going to change any further at the dynamic load time. Therefore there is no need ever to refuse the use of these relocations with such symbols, as the resulting run-time value observed by the program will be correct even in PIC code. This is not the case with R_MIPS_26 and its compressed counterparts, because the run-time value calculated by the instructions these relocations are used with depends on the address of the instruction itself, and that can change according to the base address used by the dynamic loader. Therefore these relocations have to continue being rejected in PIC code even with absolute symbols. This allows successful linking of code that relies on previous linker behavior up to commit 861fb55ab50a ("Defer allocation of R_MIPS_REL32 GOT slots"), <https://sourceware.org/ml/binutils/2008-08/msg00096.html>, which introduced the problematic check missing this special exception for absolute symbols. bfd/ * elfxx-mips.c (_bfd_mips_elf_check_relocs) <R_MIPS16_HI16> <R_MIPS_HI16, R_MIPS_HIGHER, R_MIPS_HIGHEST, R_MICROMIPS_HI16> <R_MICROMIPS_HIGHER, R_MICROMIPS_HIGHEST>: Also accept an absolute symbol in PIC code. ld/ * testsuite/ld-mips-elf/pic-reloc-0.d: New test. * testsuite/ld-mips-elf/pic-reloc-1.d: New test. * testsuite/ld-mips-elf/pic-reloc-2.d: New test. * testsuite/ld-mips-elf/pic-reloc-3.d: New test. * testsuite/ld-mips-elf/pic-reloc-4.d: New test. * testsuite/ld-mips-elf/pic-reloc-absolute-hi.ld: New test linker script. * testsuite/ld-mips-elf/pic-reloc-absolute-lo.ld: New test linker script. * testsuite/ld-mips-elf/pic-reloc-ordinary.ld: New test linker script. * testsuite/ld-mips-elf/pic-reloc-j.s: New test source. * testsuite/ld-mips-elf/pic-reloc-lui.s: New test source. * testsuite/ld-mips-elf/mips-elf.exp: Run the new tests. 2018-11-28 00:34:03 +08:00			`.text`
			`.globl foo`
			`.ent foo`
			`foo:`
			`lui $2, %hi(bar)`
			`addiu $2, %lo(bar)`
			`lui $2, %hi(bar)`
			`addiu $2, %lo(bar)`
			`.end foo`

			`# Force some (non-delay-slot) zero bytes, to make 'objdump' print ...`
			`.align 4, 0`
			`.space 16`