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| author | Alan Modra <amodra@gmail.com> | 2015-01-27 23:40:05 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2015-01-28 18:30:54 +1030 |
| commit | dbd1e97e32057af2841e5150daa2e2d4cb046a3b (patch) | |
| tree | ad21bab1f655d821724de5eab738bd4016aff80d /ld/testsuite/ld-powerpc | |
| parent | 3f8107ab38095bb3db840f9f14a0fd339f55e06e (diff) | |
| download | gdb-dbd1e97e32057af2841e5150daa2e2d4cb046a3b.zip gdb-dbd1e97e32057af2841e5150daa2e2d4cb046a3b.tar.gz gdb-dbd1e97e32057af2841e5150daa2e2d4cb046a3b.tar.bz2 | |
PowerPC64 changes for xlc
The changes to reorder sections for better relro protection on powerpc64,
3e2b0f31, 23283c1b, and 5ad18f16, run into a problem with xlc.
xlc -qdatalocal puts global variables into .toc, which means that .toc
must be writable. The simplest way to accomplish this is to edit the
linker script to remove .toc sections from .got on detecting xlc object
files.
bfd/
* elf64-ppc.h (struct ppc64_elf_params): Add "object_in_toc".
* elf64-ppc.c (ppc64_elf_add_symbol_hook): Assume that global symbols
in .toc indicate xlc compiled code that might require a rw .toc.
ld/
* emulparams/elf64ppc.sh (INITIAL_READWRITE_SECTIONS): Define.
* emultempl/ppc64elf.em (params): Init new field.
(ppc_after_open): New function.
(LDEMUL_AFTER_OPEN): Define.
* ldlang.c (lang_final): Whitespace fix.
ld/testsuite/
* ld-powerpc/tocvar.d, * ld-powerpc/tocvar.s: New test.
* ld-powerpc/tocnovar.d, * ld-powerpc/tocnovar.s: New test.
* ld-powerpc/powerpc.exp: Run tocvar and tocnovar.
Diffstat (limited to 'ld/testsuite/ld-powerpc')
| -rw-r--r-- | ld/testsuite/ld-powerpc/powerpc.exp | 2 | ||||
| -rw-r--r-- | ld/testsuite/ld-powerpc/tocnovar.d | 14 | ||||
| -rw-r--r-- | ld/testsuite/ld-powerpc/tocnovar.s | 16 | ||||
| -rw-r--r-- | ld/testsuite/ld-powerpc/tocvar.d | 14 | ||||
| -rw-r--r-- | ld/testsuite/ld-powerpc/tocvar.s | 17 |
5 files changed, 63 insertions, 0 deletions
diff --git a/ld/testsuite/ld-powerpc/powerpc.exp b/ld/testsuite/ld-powerpc/powerpc.exp index 11f1e4f..81cc310 100644 --- a/ld/testsuite/ld-powerpc/powerpc.exp +++ b/ld/testsuite/ld-powerpc/powerpc.exp @@ -320,3 +320,5 @@ run_dump_test "attr-gnu-12-11" run_dump_test "attr-gnu-12-21" run_dump_test "vle-multiseg-6" +run_dump_test "tocvar" +run_dump_test "tocnovar" diff --git a/ld/testsuite/ld-powerpc/tocnovar.d b/ld/testsuite/ld-powerpc/tocnovar.d new file mode 100644 index 0000000..d1fd258 --- /dev/null +++ b/ld/testsuite/ld-powerpc/tocnovar.d @@ -0,0 +1,14 @@ +#source: tocnovar.s +#as: -a64 +#ld: -melf64ppc -z relro +#readelf: -l --wide +#target: powerpc64*-*-* + +#... + +LOAD .* + +LOAD .* + +GNU_RELRO .* +#... + +00 +\.text + +01 +\.opd \.got + +02 +\.opd \.got diff --git a/ld/testsuite/ld-powerpc/tocnovar.s b/ld/testsuite/ld-powerpc/tocnovar.s new file mode 100644 index 0000000..8045d14 --- /dev/null +++ b/ld/testsuite/ld-powerpc/tocnovar.s @@ -0,0 +1,16 @@ + .section .opd,"aw",@progbits + .global _start + .type _start,@function +_start: + .quad .L_start, .TOC.@tocbase, 0 + + .text +.L_start: + lwz 3,x@toc(2) + b _start + .size _start,.-.L_start + + .section .toc,"aw",@progbits + .type x,@object +x: .long 0 + .size x,.-x diff --git a/ld/testsuite/ld-powerpc/tocvar.d b/ld/testsuite/ld-powerpc/tocvar.d new file mode 100644 index 0000000..62bc998 --- /dev/null +++ b/ld/testsuite/ld-powerpc/tocvar.d @@ -0,0 +1,14 @@ +#source: tocvar.s +#as: -a64 +#ld: -melf64ppc -z relro +#readelf: -l --wide +#target: powerpc64*-*-* + +#... + +LOAD .* + +LOAD .* + +GNU_RELRO .* +#... + +00 +\.text + +01 +\.opd \.toc + +02 +\.opd diff --git a/ld/testsuite/ld-powerpc/tocvar.s b/ld/testsuite/ld-powerpc/tocvar.s new file mode 100644 index 0000000..d4ebbbe --- /dev/null +++ b/ld/testsuite/ld-powerpc/tocvar.s @@ -0,0 +1,17 @@ + .section .opd,"aw",@progbits + .global _start + .type _start,@function +_start: + .quad .L_start, .TOC.@tocbase, 0 + + .text +.L_start: + lwz 3,x@toc(2) + b _start + .size _start,.-.L_start + + .section .toc,"aw",@progbits + .global x + .type x,@object +x: .long 0 + .size x,.-x |