binutils-gdb/ld/testsuite/ld-aarch64/farcall-bl-section.d

#name: aarch64-farcall-bl-section
#source: farcall-bl-section.s
#as:
#ld: -Ttext 0x1000 --section-start .foo=0x8001000
#objdump: -dr
#...

Disassembly of section .text:

.* <_start>:
    1000:	94000008 	bl	1020 <___veneer>
    1004:	94000003 	bl	1010 <___veneer>
    1008:	d65f03c0 	ret
    100c:	1400000d 	b	1040 <___veneer\+0x20>

.* <___veneer>:
    1010:	90040010 	adrp	x16, 8001000 <bar>
    1014:	91001210 	add	x16, x16, #0x4
    1018:	d61f0200 	br	x16
    101c:	00000000 	.inst	0x00000000 ; undefined

.* <___veneer>:
    1020:	90040010 	adrp	x16, 8001000 <bar>
    1024:	91000210 	add	x16, x16, #0x0
    1028:	d61f0200 	br	x16
	...

Disassembly of section .foo:

.* <bar>:
 8001000:	d65f03c0 	ret

.* <bar2>:
 8001004:	d65f03c0 	ret
[AArch64] Relax long branch veneer insertion for non STT_FUNC symbol As defined at AArch64 ELF Specification (4.6.7 Call and Jump relocations), symbol with type of non STT_FUNC but in different input section with relocation place should insert long branch veneer also. Meanwhile the current long branch veneer infrastructure havn't considered the situation where the branch destination is "sym_value + rela->addend". This was OK because we only insert veneer for long call destination is STT_FUNC symbol for which the addend is always zero. But as we relax the support to other situations by this patch, we need to handle addend be non-zero value. For example, for static function, relocation against "local symbol" are turned into relocation against "section symbol + offset" where there is a valid addend. bfd/ * elfnn-aarch64.c (aarch64_type_of_stub): Allow insert long branch veneer for sym_sec != input_sec. (elfNN_aarch64_size_stub): Support STT_SECTION symbol. (elfNN_aarch64_final_link_relocate): Take rela addend into account when calculation destination. ld/ * testsuite/ld-aarch64/farcall-section.d: Delete. * testsuite/ld-aarch64/farcall-section.s: Delete. * testsuite/ld-aarch64/farcall-b-section.d: New expectation file. * testsuite/ld-aarch64/farcall-bl-section.d: Likewise. * testsuite/ld-aarch64/farcall-b-section.s: New testcase. * testsuite/ld-aarch64/farcall-bl-section.s: Likewise. * testsuite/ld-aarch64/aarch64-elf.exp: Likewise. 2016-01-21 00:57:59 +08:00			`#name: aarch64-farcall-bl-section`
			`#source: farcall-bl-section.s`
			`#as:`
			`#ld: -Ttext 0x1000 --section-start .foo=0x8001000`
			`#objdump: -dr`
			`#...`

			`Disassembly of section .text:`

			`.* <_start>:`
			`1000: 94000008 bl 1020 <___veneer>`
			`1004: 94000003 bl 1010 <___veneer>`
			`1008: d65f03c0 ret`
			`100c: 1400000d b 1040 <___veneer\+0x20>`

			`.* <___veneer>:`
			`1010: 90040010 adrp x16, 8001000 <bar>`
			`1014: 91001210 add x16, x16, #0x4`
			`1018: d61f0200 br x16`
			`101c: 00000000 .inst 0x00000000 ; undefined`

			`.* <___veneer>:`
			`1020: 90040010 adrp x16, 8001000 <bar>`
			`1024: 91000210 add x16, x16, #0x0`
			`1028: d61f0200 br x16`
			`...`

			`Disassembly of section .foo:`

			`.* <bar>:`
			`8001000: d65f03c0 ret`

			`.* <bar2>:`
			`8001004: d65f03c0 ret`