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binutils-gdb/ld/testsuite/ld-powerpc/notoc.s

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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
.text
.globl f1, f2, g1, g2, _start
.weak ext
.abiversion 2
f1:
.localentry f1,1
bl f1@notoc
bl f2@notoc
bl g1@notoc
bl g2@notoc
bl ext@notoc
blr
g1:
.localentry g1,1
bl f2@notoc
bl f1@notoc
bl g2@notoc
bl g1@notoc
blr
f2:
0:
addis 2,12,.TOC.-0b@ha
addi 2,2,.TOC.-0b@l
.localentry f2,.-0b
bl f1
nop
bl f2
nop
bl g1
nop
bl g2
nop
bl ext
nop
blr
g2:
0:
addis 2,12,.TOC.-0b@ha
addi 2,2,.TOC.-0b@l
.localentry g2,.-0b
bl f2
nop
bl f1
nop
bl g2
nop
bl g1
nop
blr
_start:
PowerPC64 EH info for _notoc linkage stubs This patch generates EH info for the new _notoc linkage stubs, to support unwinding from asynchronous signal handlers. Unwinding through the __tls_get_addr_opt stub was already supported, but that was just a single stub. With multiple stubs the EH opcodes need to be emitted and sized when iterating over stubs, so this is done when emitting and sizing the stub code. Emitting the CIEs and FDEs is done when sizing the stubs, as we did before in order to have the linker generated FDEs indexed in .eh_frame_hdr. I moved the final tweaks to FDEs from ppc64_elf_finish_dynamic_sections to ppc64_elf_build_stubs simply because it's tidier to be done with them at that point. bfd/ * elf64-ppc.c (struct map_stub): Delete tls_get_addr_opt_bctrl. Add lr_restore, eh_size and eh_base. (eh_advance, eh_advance_size): New functions. (build_tls_get_addr_stub): Emit EH info for stub. (ppc_build_one_stub): Likewise for _notoc stubs. (ppc_size_one_stub): Size EH info for stub. (group_sections): Init new map_stub fields. (stub_eh_frame_size): Delete. (ppc64_elf_size_stubs): Size EH info for stubs. Set up dummy EH program for stubs. (ppc64_elf_build_stubs): Reinit new map_stub fields. Set FDE offset to stub section here.. (ppc64_elf_finish_dynamic_sections): ..rather than here. ld/ * testsuite/ld-powerpc/notoc.s: Generate some cfi. * testsuite/ld-powerpc/notoc.d: Adjust. * testsuite/ld-powerpc/notoc.wf: New file. * testsuite/ld-powerpc/powerpc.exp: Run "ext" and "notoc" tests as run_ld_link_tests rather than run_dump_test.
2018-08-06 20:13:51 +08:00
.cfi_startproc
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
b _start
PowerPC64 EH info for _notoc linkage stubs This patch generates EH info for the new _notoc linkage stubs, to support unwinding from asynchronous signal handlers. Unwinding through the __tls_get_addr_opt stub was already supported, but that was just a single stub. With multiple stubs the EH opcodes need to be emitted and sized when iterating over stubs, so this is done when emitting and sizing the stub code. Emitting the CIEs and FDEs is done when sizing the stubs, as we did before in order to have the linker generated FDEs indexed in .eh_frame_hdr. I moved the final tweaks to FDEs from ppc64_elf_finish_dynamic_sections to ppc64_elf_build_stubs simply because it's tidier to be done with them at that point. bfd/ * elf64-ppc.c (struct map_stub): Delete tls_get_addr_opt_bctrl. Add lr_restore, eh_size and eh_base. (eh_advance, eh_advance_size): New functions. (build_tls_get_addr_stub): Emit EH info for stub. (ppc_build_one_stub): Likewise for _notoc stubs. (ppc_size_one_stub): Size EH info for stub. (group_sections): Init new map_stub fields. (stub_eh_frame_size): Delete. (ppc64_elf_size_stubs): Size EH info for stubs. Set up dummy EH program for stubs. (ppc64_elf_build_stubs): Reinit new map_stub fields. Set FDE offset to stub section here.. (ppc64_elf_finish_dynamic_sections): ..rather than here. ld/ * testsuite/ld-powerpc/notoc.s: Generate some cfi. * testsuite/ld-powerpc/notoc.d: Adjust. * testsuite/ld-powerpc/notoc.wf: New file. * testsuite/ld-powerpc/powerpc.exp: Run "ext" and "notoc" tests as run_ld_link_tests rather than run_dump_test.
2018-08-06 20:13:51 +08:00
.cfi_endproc
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