Clément Chigot 1b2cb8e2ee aix: implement TLS relocation for gas and ld ... Add support for TLS in XCOFF. Amongst the things done by this commit: - Update XCOFF auxialiary header to match new version and allow TLS sections. - Add TLS sections (.tdata and .tbss) support in gas and ld. - Add support for the TLS relocations in gas and ld. Two different types BFD_RELOC are created for PPC and PPC64 as the size is a pointer, thus distinct in 32 or 64bit. The addresses given by ld to .tdata and .tbss is a bit special. In XCOFF, these addresses are actually offsets from the TLS pointer computed at runtime. AIX assembly and linker does the same. In top of that, the .tdata must be before .data (this is mandatory for AIX loader). Thus, the aix ld script is recomputing "." before .data to restore its original value. There might be a simpler way, but this one is working. Optimisation linked to TLS relocations aren't yet implemented. bfd/ * reloc.c (BFD_RELOC_PPC_TLS_LE, BFD_RELOC_PPC_TLS_IE, BFD_RELOC_PPC_TLS_M, BFD_RELOC_PPC_TLS_ML, BFD_RELOC_PPC64_TLS_GD, BFD_RELOC_PPC64_TLS_LD, BFD_RELOC_PPC64_TLS_LE, BFD_RELOC_PPC64_TLS_IE, BFD_RELOC_PPC64_TLS_M, BFD_RELOC_PPC64_TLS_ML): New relocations. * bfd-in2.h: Regenerate. * libbfd.h: Regenerate. * coff-rs6000.c (xcoff_calculate_relocation): Call xcoff_reloc_type_tls for TLS relocations. (xcoff_howto_table): Implement TLS relocations. (_bfd_xcoff_reloc_type_lookup): Add cases TLS relocations. (xcoff_reloc_type_tls): New function. * coff64-rs6000.c (xcoff_calculate_relocation): Likewise. (xcoff_howto_table): Likewise. (_bfd_xcoff_reloc_type_lookup): Likewise. * coffcode.h (sec_to_styp_flags): Handle TLS sections. (styp_to_sec_flags): Likewise. (coff_compute_section_file_positions): Avoid file offset optimisation for .data when the previous section is .tdata. (coff_write_object_contents): Handle TLS sections. * coffswap.h (coff_swap_aouthdr_out): Add support for new fields in aouthdr. * libxcoff.h (xcoff_reloc_type_tls): Add prototype. * xcofflink.c (xcoff_link_add_symbols): Handle XMC_UL. (xcoff_need_ldrel_p): Add cases for TLS relocations. (xcoff_create_ldrel): Add l_symndx for TLS sections. gas/ * config/tc-ppc.c (ppc_xcoff_text_section, ppc_xcoff_data_section, (ppc_xcoff_bss_section, ppc_xcoff_tdata_section, (ppc_xcoff_tbss_section): New variables. (ppc_text_subsegment, ppc_text_csects, ppc_data_subgments, (ppc_data_csects): Removed. (ppc_xcoff_section_is_initialized, ppc_init_xcoff_section, ppc_xcoff_parse_cons): New functions. (md_being): Initialize XCOFF sections. (ppc_xcoff_suffix): Add support for TLS relocations (fixup_size, md_apply_fix): Add support for new BFD_RELOC. (ppc_change_csect): Handle XMC_TL, XMC_UL. Correctly, add XMC_BS to .bss section. Handle new XCOFF section variables. (ppc_comm): Likewise. (ppc_toc): Likewise. (ppc_symbol_new_hook): Likewise. (ppc_frob_symbol): Likewise. (ppc_fix_adjustable): Add tbss support. * config/tc-ppc.h (TC_PARSE_CONS_EXPRESSION): New define. (ppc_xcoff_parse_cons): Add prototype. (struct ppc_xcoff_section): New structure. ld/ * emultempl/aix.em: Ensure .tdata section is removed if empty, even with -r flag. * scripttempl/aix.sc: Handle TLS sections. * testsuite/ld-powerpc/aix52.exp: Add new tests. * testsuite/ld-powerpc/aix-tls-reloc-32.d: New test. * testsuite/ld-powerpc/aix-tls-reloc-64.d: New test. * testsuite/ld-powerpc/aix-tls-reloc.ex: New test. * testsuite/ld-powerpc/aix-tls-reloc.s: New test. * testsuite/ld-powerpc/aix-tls-section-32.d: New test. * testsuite/ld-powerpc/aix-tls-section-64.d: New test. * testsuite/ld-powerpc/aix-tls-section.ex: New test. * testsuite/ld-powerpc/aix-tls-section.s: New test. include/ * coff/internal.h (struct internal_aouthdr): Add new fields. * coff/rs6000.h (AOUTHDRÃ): Add new fields. * coff/rs6k64.h (struct external_filehdr): Likewise. * coff/xcoff.h (_TDATA), _TBSS): New defines (RS6K_AOUTHDR_TLS_LE, RS6K_AOUTHDR_RAS, RS6K_AOUTHDR_ALGNTDATA, RS6K_AOUTHDR_SHR_SYMTAB, RS6K_AOUTHDR_FORK_POLICY, RS6K_AOUTHDR_FORK_COR): New defines. (XMC_TU): Removed. (XMC_UL): New define.		2021-03-12 22:47:33 +10:30
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config
ld-aarch64
ld-alpha
ld-arc
ld-arm
ld-auto-import
ld-avr
ld-bootstrap
ld-bpf
ld-cdtest
ld-checks
ld-cris
ld-crx
ld-csky
ld-ctf
ld-cygwin
ld-d10v
ld-discard
ld-dynamic
ld-elf	PR27128, nm -P portable output format regression	2021-03-01 14:26:39 +10:30
ld-elfcomm
ld-elfvers
ld-elfvsb
ld-elfweak
ld-fastcall
ld-frv
ld-gc	PE image base fallout	2021-03-12 10:41:34 +10:30
ld-h8300
ld-i386	readelf: Replace procesor with processor	2021-02-20 05:55:42 -08:00
ld-ia64
ld-ifunc
ld-libs
ld-linkonce
ld-m68hc11
ld-m68k
ld-mep
ld-metag
ld-mips-elf
ld-misc
ld-mmix
ld-mn10300
ld-msp430-elf
ld-nds32
ld-nios2
ld-or1k
ld-pdp11
ld-pe	ld: adjust PE base relocations testcase	2021-03-09 12:40:13 +01:00
ld-pie
ld-plugin	Add PR27441 testcase	2021-02-26 17:49:04 +10:30
ld-powerpc	aix: implement TLS relocation for gas and ld	2021-03-12 22:47:33 +10:30
ld-pru
ld-riscv-elf	RISC-V: Improve multiple relax passes problem.	2021-03-11 17:27:13 +08:00
ld-s12z
ld-s390
ld-scripts	PE image base fallout	2021-03-12 10:41:34 +10:30
ld-selective
ld-sh
ld-shared
ld-size
ld-sparc
ld-spu
ld-srec	PE image base fallout	2021-03-12 10:41:34 +10:30
ld-tic6x
ld-tilegx
ld-tilepro
ld-undefined	bfd: don't silently wrap or truncate PE image section RVAs	2021-03-09 08:52:32 +01:00
ld-unique
ld-v850
ld-vax-elf
ld-visium
ld-vxworks
ld-x86-64	elf/x86-64: Subtract __ImageBase for R_AMD64_IMAGEBASE	2021-03-05 18:25:06 -08:00
ld-xc16x
ld-xstormy16
ld-xtensa
ld-z8k
ld-z80
lib	PE image base fallout	2021-03-12 10:41:34 +10:30
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