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8 Commits

Author SHA1 Message Date
Fangrui Song 9c371309f3 [ELF][X86] Allow PT_LOAD to have overlapping p_offset ranges on EM_386 
Ported the D64906 technique to EM_386.

If `sh_addralign(.tdata) < sh_addralign(.tbss)`,
we can potentially make `p_vaddr(PT_TLS)%p_align(PT_TLS) != 0`.

ld.so that are known to have problems if p_vaddr%p_align!=0:

* FreeBSD 13.0-CURRENT rtld-elf
* glibc https://sourceware.org/bugzilla/show_bug.cgi?id=24606

New test i386-tls-vaddr-align.s checks our workaround makes p_vaddr%p_align = 0.

Reviewed By: ruiu

Differential Revision: https://reviews.llvm.org/D65865

llvm-svn: 369347
 2019-08-20 08:43:47 +00:00
Fangrui Song 5ebee2558b [ELF][X86] Add --no-show-raw-insn and -soname to some i386 tests 
llvm-svn: 368142
 2019-08-07 09:43:54 +00:00
Fangrui Song 5387c2cd17 [llvm-objdump] Print newlines before and after "Disassembly of section ...:" 
This improves readability and the behavior is consistent with GNU objdump.

The new test test/tools/llvm-objdump/X86/disassemble-section-name.s
checks we print newlines before and after "Disassembly of section ...:"

Differential Revision: https://reviews.llvm.org/D61127

llvm-svn: 359668
 2019-05-01 10:40:48 +00:00
Fangrui Song b159906a9a [test] Change llvm-readobj -long-option to --long-option or well-known short options. NFC 
Also change some options that have different semantics (cause confusion) in llvm-readelf mode:

-s => -S
-t => --symbols
-sd => --section-data

llvm-svn: 359651
 2019-05-01 05:49:01 +00:00
Dimitry Andric c9de3b4d26 Align AArch64 and i386 image base to superpage 
Summary:

As for x86_64, the default image base for AArch64 and i386 should be
aligned to a superpage appropriate for the architecture.

On AArch64, this is 2 MiB, on i386 it is 4 MiB.

Reviewers: emaste, grimar, javed.absar, espindola, ruiu, peter.smith, srhines, rprichard

Reviewed By: ruiu, peter.smith

Subscribers: jfb, markj, arichardson, krytarowski, kristof.beyls, llvm-commits

Differential Revision: https://reviews.llvm.org/D50297

llvm-svn: 342746
 2018-09-21 16:58:13 +00:00
Rafael Espindola 75baf09be5 Don't include tbss's alignment in offset. 
The .tbss section is in the middle of a PT_LOAD. Whatever treatment we
give to its address we must also give to the offset.

We were ignoring it for address computations, but not for offset.

Fixes pr26712.

llvm-svn: 261667
 2016-02-23 18:39:55 +00:00
Rafael Espindola 97cbe3e39c Place RW sections that go after relro to another memory page. 
Before this patch sections that go after relro sequence were placed at
the same memory page with relro ones. It caused segmentation fault on
freebsd.

Fixes PR25790.

Patch by George Rimar with some tweaks by myself.

llvm-svn: 256334
 2015-12-23 15:20:38 +00:00
George Rimar 70e2508259 [ELF] - R_386_COPY relocation implemented (x86) 
Implements R_386_COPY relocation for x86 target.
Similar to one for x64 http://reviews.llvm.org/D14090 which did most of job needed.

Differential revision: http://reviews.llvm.org/D14958

llvm-svn: 254065
 2015-11-25 11:27:40 +00:00