binutils-gdb/ld/testsuite/ld-powerpc/ext.d

#source: ext.s
#as: -a64
#objdump: -dr
#target: powerpc64*-*-*
# Just assembles an object for notoc.d

.*

Disassembly of section \.text:

0+ <ext>:
   0:	(00 00 4c 3c|3c 4c 00 00) 	addis   r2,r12,0
			(0|2): R_PPC64_REL16_HA	\.TOC\.(|\+0x2)
   4:	(00 00 42 38|38 42 00 00) 	addi    r2,r2,0
			(4|6): R_PPC64_REL16_LO	\.TOC\.\+0x(4|6)
   8:	(00 00 00 60|60 00 00 00) 	nop
   c:	(20 00 80 4e|4e 80 00 20) 	blr
R_PPC64_REL24_NOTOC support R_PPC64_REL24_NOTOC is used on calls like "bl foo@notoc" to tell the linker that linkage stubs for PLT calls or long branches can't use r2 for pic addressing. Instead, new stubs that generate pc-relative addresses are used. One complication is that pc-relative offsets to the PLT may need to be 64-bit in large programs, in contrast to the toc-relative addressing used by older PLT linkage stubs where a 32-bit offset is sufficient until the PLT itself exceeds 2G in size. .eh_frame info to cover the _notoc stubs is yet to be implemented. bfd/ * elf64-ppc.c (ADDI_R12_R11, ADDI_R12_R12, LIS_R12), (ADDIS_R12_R11, ORIS_R12_R12_0, ORI_R12_R12_0), (SLDI_R12_R12_32, LDX_R12_R11_R12, ADD_R12_R11_R12): Define. (ppc64_elf_howto_raw): Add R_PPC64_REL24_NOTOC entry. (ppc64_elf_reloc_type_lookup): Support R_PPC64_REL24_NOTOC. (ppc_stub_type): Add ppc_stub_long_branch_notoc, ppc_stub_long_branch_both, ppc_stub_plt_branch_notoc, ppc_stub_plt_branch_both, ppc_stub_plt_call_notoc, and ppc_stub_plt_call_both. (is_branch_reloc): Add R_PPC64_REL24_NOTOC. (build_offset, size_offset): New functions. (plt_stub_size): Support plt_call_notoc and plt_call_both. (ppc_build_one_stub, ppc_size_one_stub): Support new stubs. (toc_adjusting_stub_needed): Handle R_PPC64_REL24_NOTOC. (ppc64_elf_size_stubs): Likewise, and new stubs. (ppc64_elf_build_stubs, ppc64_elf_relocate_section): Likewise. * reloc.c: Add BFD_RELOC_PPC64_REL24_NOTOC. * bfd-in2.h: Regenerate. * libbfd.h: Regenerate. gas/ * config/tc-ppc.c (ppc_elf_suffix): Support @notoc. (ppc_force_relocation, ppc_fix_adjustable): Handle REL24_NOTOC. ld/ * testsuite/ld-powerpc/ext.d, * testsuite/ld-powerpc/ext.s, * testsuite/ld-powerpc/ext.lnk, * testsuite/ld-powerpc/notoc.d, * testsuite/ld-powerpc/notoc.s: New tests. * testsuite/ld-powerpc/powerpc.exp: Run them. 2018-08-03 15:11:22 +08:00			`#source: ext.s`
			`#as: -a64`
			`#objdump: -dr`
			`#target: powerpc64--*`
			`# Just assembles an object for notoc.d`

			`.*`

			`Disassembly of section \.text:`

			`0+ <ext>:`
			`0: (00 00 4c 3c\|3c 4c 00 00) addis r2,r12,0`
			`(0\|2): R_PPC64_REL16_HA \.TOC\.(\|\+0x2)`
			`4: (00 00 42 38\|38 42 00 00) addi r2,r2,0`
			`(4\|6): R_PPC64_REL16_LO \.TOC\.\+0x(4\|6)`
			`8: (00 00 00 60\|60 00 00 00) nop`
			`c: (20 00 80 4e\|4e 80 00 20) blr`