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binutils-gdb/ld/testsuite/ld-powerpc/ppc476-shared.d

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ppc476 linker workaround shared lib fixes When building a shared lib from non-PIC objects, we'll get dynamic text relocations. These need to move with any insns we move. Otherwise the dynamic reloc will modify the branch, resulting in crashes and other unpleasant behaviour. Also, ld -r --ppc476-workaround used with sufficiently aligned PIC objects needs a fix for emitted REL16 relocs. bfd/ * elf64-ppc.c (ppc_elf_relocate_section): Move dynamic text relocs with insns moved by --ppc476-workaround. Correct output of REL16 relocs. ld/testsuite/ * ld-powerpc/ppc476-shared.s, * ld-powerpc/ppc476-shared.lnk, * ld-powerpc/ppc476-shared.d, * ld-powerpc/ppc476-shared2.d: New tests. * ld-powerpc/powerpc.exp: Run them.
2015-06-05 11:05:40 +02:00
#source: ppc476-shared.s
#as: -a32
powerpc common-page-size max-page-size only matters for demand paged executables or shared libraries, and the ideal size is the largest value used by your operating system. Values larger than necessary just waste file space and memory. common-page-size also affects file and memory size, trading a possible small increase in file size for a decrease in memory size when the operating system is using a common-page-size page. With a powerpc max-page-size of 64k and common-page-size of 4k many executables will use no more memory pages when the system page size is 4k than an executable linked with -z max-page-size=0x1000, yet will still run on a system using 64k pages. However, when running on a system using 64k pages relro protection will not be completely effective. Due to the relro problem, powerpc binutils has been using a default common-page-size of 64k since 2014-12-18 (git commit 04c6a44c7), leading to complaints about increased file and memory sizes. People not using relro do have a valid reason to complain.. So this patch introduces an extra back-end value to use as the default for common-page-size when generating relro executables, and enables the support for powerpc. Non relro executables will now be generated with a default common-page-size of 4k. bfd/ * elf-bfd.h (struct elf_backend_data): Add relropagesize. * elfxx-target.h (ELF_RELROPAGESIZE): Provide default and sanity test. (elfNN_bed): Init relropagesize. * bfd.c (bfd_emul_get_commonpagesize): Add boolean param to select relropagesize. * elf32-ppc.c (ELF_COMMONPAGESIZE): Define as 0x1000. (ELF_RELROPAGESIZE): Define as ELF_MAXPAGESIZE. (ELF_MINPAGESIZE): Don't define. * elf64-ppc.c (ELF_COMMONPAGESIZE): Define as 0x1000. (ELF_RELROPAGESIZE): Define as ELF_MAXPAGESIZE. * bfd-in2.h: Regenerate. ld/ * ldmain.c (main): Move config.maxpagesize and config.commonpagesize initialization to.. * ldemul.c (after_parse_default): ..here. * testsuite/ld-powerpc/ppc476-shared.d: Pass -z common-page-size. * testsuite/ld-powerpc/ppc476-shared2.d: Likewise.
2018-04-14 08:53:56 +02:00
#ld: -melf32ppc -q -shared -z common-page-size=0x10000 --ppc476-workaround -T ppc476-shared.lnk
ppc476 linker workaround shared lib fixes When building a shared lib from non-PIC objects, we'll get dynamic text relocations. These need to move with any insns we move. Otherwise the dynamic reloc will modify the branch, resulting in crashes and other unpleasant behaviour. Also, ld -r --ppc476-workaround used with sufficiently aligned PIC objects needs a fix for emitted REL16 relocs. bfd/ * elf64-ppc.c (ppc_elf_relocate_section): Move dynamic text relocs with insns moved by --ppc476-workaround. Correct output of REL16 relocs. ld/testsuite/ * ld-powerpc/ppc476-shared.s, * ld-powerpc/ppc476-shared.lnk, * ld-powerpc/ppc476-shared.d, * ld-powerpc/ppc476-shared2.d: New tests. * ld-powerpc/powerpc.exp: Run them.
2015-06-05 11:05:40 +02:00
#objdump: -dr
#target: powerpc*-*-*
.*: file format .*
Disassembly of section \.text:
ppc476 linker workaround shared lib fixes again Huh, I can't even write a binary search properly. bfd/ * elf32-ppc.c (ppc_elf_relocate_section): Correct binary search of dynamic relocs. ld/testsuite/ * ld-powerpc/ppc476-shared.s: Repeat dynamic reloc generating insns. * ld-powerpc/ppc476-shared.d: Update. * ld-powerpc/ppc476-shared2.d: Update.
2015-06-16 09:17:51 +02:00
0000fffc <\.text>:
fffc: (48 03 00 04|04 00 03 48) b 40000 .*
ppc476 linker workaround shared lib fixes When building a shared lib from non-PIC objects, we'll get dynamic text relocations. These need to move with any insns we move. Otherwise the dynamic reloc will modify the branch, resulting in crashes and other unpleasant behaviour. Also, ld -r --ppc476-workaround used with sufficiently aligned PIC objects needs a fix for emitted REL16 relocs. bfd/ * elf64-ppc.c (ppc_elf_relocate_section): Move dynamic text relocs with insns moved by --ppc476-workaround. Correct output of REL16 relocs. ld/testsuite/ * ld-powerpc/ppc476-shared.s, * ld-powerpc/ppc476-shared.lnk, * ld-powerpc/ppc476-shared.d, * ld-powerpc/ppc476-shared2.d: New tests. * ld-powerpc/powerpc.exp: Run them.
2015-06-05 11:05:40 +02:00
10000: (38 63 00 00|00 00 63 38) addi r3,r3,0
ppc476 linker workaround shared lib fixes again Huh, I can't even write a binary search properly. bfd/ * elf32-ppc.c (ppc_elf_relocate_section): Correct binary search of dynamic relocs. ld/testsuite/ * ld-powerpc/ppc476-shared.s: Repeat dynamic reloc generating insns. * ld-powerpc/ppc476-shared.d: Update. * ld-powerpc/ppc476-shared2.d: Update.
2015-06-16 09:17:51 +02:00
1000[02]: R_PPC_ADDR16_LO \.bss
ppc476 linker workaround shared lib fixes When building a shared lib from non-PIC objects, we'll get dynamic text relocations. These need to move with any insns we move. Otherwise the dynamic reloc will modify the branch, resulting in crashes and other unpleasant behaviour. Also, ld -r --ppc476-workaround used with sufficiently aligned PIC objects needs a fix for emitted REL16 relocs. bfd/ * elf64-ppc.c (ppc_elf_relocate_section): Move dynamic text relocs with insns moved by --ppc476-workaround. Correct output of REL16 relocs. ld/testsuite/ * ld-powerpc/ppc476-shared.s, * ld-powerpc/ppc476-shared.lnk, * ld-powerpc/ppc476-shared.d, * ld-powerpc/ppc476-shared2.d: New tests. * ld-powerpc/powerpc.exp: Run them.
2015-06-05 11:05:40 +02:00
\.\.\.
ppc476 linker workaround shared lib fixes again Huh, I can't even write a binary search properly. bfd/ * elf32-ppc.c (ppc_elf_relocate_section): Correct binary search of dynamic relocs. ld/testsuite/ * ld-powerpc/ppc476-shared.s: Repeat dynamic reloc generating insns. * ld-powerpc/ppc476-shared.d: Update. * ld-powerpc/ppc476-shared2.d: Update.
2015-06-16 09:17:51 +02:00
1fffc: (48 02 00 14|14 00 02 48) b 40010 .*
20000: (38 63 00 00|00 00 63 38) addi r3,r3,0
2000[02]: R_PPC_ADDR16_LO \.bss
\.\.\.
2fffc: (48 01 00 24|24 00 01 48) b 40020 .*
30000: (38 63 00 00|00 00 63 38) addi r3,r3,0
3000[02]: R_PPC_ADDR16_LO \.bss
\.\.\.
3fff0: (42 9f 00 05|05 00 9f 42) bcl .*
3fff4: (7d 28 02 a6|a6 02 28 7d) mflr r9
Make ppc476 testcases more robust * testsuite/ld-powerpc/ppc476-shared.lnk: Align .bss. * testsuite/ld-powerpc/ppc476-shared.d: Adjust. * testsuite/ld-powerpc/ppc476-shared2.d: Adjust.
2017-07-07 16:19:42 +02:00
3fff8: (3d 29 00 01|01 00 29 3d) addis r9,r9,1
ppc476 linker workaround shared lib fixes again Huh, I can't even write a binary search properly. bfd/ * elf32-ppc.c (ppc_elf_relocate_section): Correct binary search of dynamic relocs. ld/testsuite/ * ld-powerpc/ppc476-shared.s: Repeat dynamic reloc generating insns. * ld-powerpc/ppc476-shared.d: Update. * ld-powerpc/ppc476-shared2.d: Update.
2015-06-16 09:17:51 +02:00
3fff[8a]: R_PPC_REL16_HA \.bss\+0x[46]
3fffc: (48 00 00 34|34 00 00 48) b 40030 .*
40000: (3c 60 00 00|00 00 60 3c) lis r3,0
4000[02]: R_PPC_ADDR16_HA \.bss
40004: (4b fc ff fc|fc ff fc 4b) b 10000 .*
40008: (48 00 00 02|02 00 00 48) ba 0 .*
4000c: (48 00 00 02|02 00 00 48) ba 0 .*
40010: (3c 60 00 00|00 00 60 3c) lis r3,0
4001[02]: R_PPC_ADDR16_HA \.bss
40014: (4b fd ff ec|ec ff fd 4b) b 20000 .*
40018: (48 00 00 02|02 00 00 48) ba 0 .*
4001c: (48 00 00 02|02 00 00 48) ba 0 .*
40020: (3c 60 00 00|00 00 60 3c) lis r3,0
4002[02]: R_PPC_ADDR16_HA \.bss
40024: (4b fe ff dc|dc ff fe 4b) b 30000 .*
40028: (48 00 00 02|02 00 00 48) ba 0 .*
4002c: (48 00 00 02|02 00 00 48) ba 0 .*
Make ppc476 testcases more robust * testsuite/ld-powerpc/ppc476-shared.lnk: Align .bss. * testsuite/ld-powerpc/ppc476-shared.d: Adjust. * testsuite/ld-powerpc/ppc476-shared2.d: Adjust.
2017-07-07 16:19:42 +02:00
40030: (39 29 00 0c|0c 00 29 39) addi r9,r9,12
ppc476 linker workaround shared lib fixes again Huh, I can't even write a binary search properly. bfd/ * elf32-ppc.c (ppc_elf_relocate_section): Correct binary search of dynamic relocs. ld/testsuite/ * ld-powerpc/ppc476-shared.s: Repeat dynamic reloc generating insns. * ld-powerpc/ppc476-shared.d: Update. * ld-powerpc/ppc476-shared2.d: Update.
2015-06-16 09:17:51 +02:00
4003[02]: R_PPC_REL16_LO \.bss\+0x3[ce]
40034: (4b ff ff cc|cc ff ff 4b) b 40000 .*
40038: (48 00 00 02|02 00 00 48) ba 0 .*
4003c: (48 00 00 02|02 00 00 48) ba 0 .*