Commit Graph

18 Commits

Author SHA1 Message Date
Fangrui Song d001ab82e4 [ELF] Don't fall back to .text for e_entry
We have the rule to simulate
(https://sourceware.org/binutils/docs/ld/Entry-Point.html),
but the behavior is questionable
(https://sourceware.org/pipermail/binutils/2021-September/117929.html).

gold doesn't fall back to .text.
The behavior is unlikely relied by projects (there is even a warning for
executable links), so let's just delete this fallback path.

Reviewed By: jhenderson, peter.smith

Differential Revision: https://reviews.llvm.org/D110014
2021-09-20 09:35:12 -07:00
Fangrui Song d4306e90cb [ELF][X86] Allow PT_LOAD to have overlapping p_offset ranges on EM_X86_64
Port the D64906 technique to EM_X86_64.

Differential Revision: https://reviews.llvm.org/D67482

llvm-svn: 371958
2019-09-16 07:05:34 +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
Joel Jones a5752e199c [lld] Add REQUIRES: x86 where needed to tests
If building lld without x86 support, tests that require that support should
be treated as unsupported, not errors.

Tested using:
  1. cmake '-DLLVM_TARGETS_TO_BUILD=AArch64;X86'
     make check-lld
     =>
     Expected Passes    : 1406
     Unsupported Tests  : 287

  2. cmake '-DLLVM_TARGETS_TO_BUILD=AArch64'
     make check-lld
     =>
     Expected Passes    : 410
     Unsupported Tests  : 1283

Patch by Joel Jones

Differential Revision: https://reviews.llvm.org/D47748

llvm-svn: 334095
2018-06-06 13:56:51 +00:00
Simon Atanasyan 8f7d28122c [ELF] Do not warn about missed entry symbol in case of relocatable output
Relocatable file does not need to have an entry symbol so the warning is
useless in that case.

llvm-svn: 290206
2016-12-20 22:24:45 +00:00
Rui Ueyama 2eda6d1633 Set default entry point to .text if no entry point is found.
Previously, if a symbol specified by -e or ENTRY() is not found,
we didn't set entry point address. That is incompatible with GNU
because GNU linkers set the first address of .text to entry.
This patch implement that behavior.

llvm-svn: 287836
2016-11-23 22:41:00 +00:00
Ed Maste 8fd0196c6f lld: Default image base address to 0x200000 on x86-64
Align to the large page size (known as a superpage or huge page).
FreeBSD automatically promotes large, superpage-aligned allocations.

Differential Revision:	https://reviews.llvm.org/D27042

llvm-svn: 287782
2016-11-23 17:44:02 +00:00
Rui Ueyama 22646a80f4 Include ARGV[0] in error messages.
This is what other linkers and clang driver do.

Differential Revision: https://reviews.llvm.org/D25780

llvm-svn: 284634
2016-10-19 20:05:43 +00:00
Eugene Leviant 74c1b6c548 [ELF] Add "error" and "warning" prefixes to linker messages
Differential revision: https://reviews.llvm.org/D25729

llvm-svn: 284575
2016-10-19 09:35:19 +00:00
George Rimar a213e6b6f5 [ELF] - Fix for: Bug 30521 - lld exits non-zero return value linking a library with no entry symbol
PR30521 was about linking shared library. After r282295 code when linking -shared produced
"entry symbol not found" warning, what in combination with --fatal-errors failed linkage.

Patch fixes logic (and adds testcases) to follow next rules:

1) If entry was specified and not found report warning.
2) If entry was not specified then:
 a) Emit warning if not -shared.
 b) Do not emit warning if -shared.

Differential revision: https://reviews.llvm.org/D24913

llvm-svn: 282427
2016-09-26 19:04:42 +00:00
Rafael Espindola 251e240adc Warn if we can't find the entry symbol.
Fixes pr30465.

llvm-svn: 282295
2016-09-23 21:04:56 +00:00
Eugene Leviant 3967ea05a9 Set entry address to 0x0 if no _start symbol
Differential revision: https://reviews.llvm.org/D23925

llvm-svn: 280912
2016-09-08 08:57:51 +00:00
Davide Italiano c03d610cff [ELF] Support --entry= option variant. Update tests while I'm there.
llvm-svn: 274524
2016-07-04 21:50:50 +00:00
Ed Maste f2ac688217 ELF: Allow -e <entry> with -shared
It is reasonable to specify an entry point for shared objects - for
example, for the FreeBSD rtld ld-elf.so.1.

Unlike GNU ld we leave the entry address as 0 if -shared is specified
without -e.

Differential Revision:	http://reviews.llvm.org/D15454

llvm-svn: 255349
2015-12-11 17:46:46 +00:00
Ed Maste 24bcc11e5c Test that -e <symbol> works
llvm-svn: 255347
2015-12-11 17:42:38 +00:00
Igor Kudrin b044af50f2 [ELF] Define symbols "_end" and "end" if referenced.
These symbols are expected to point to the end of the data segment.

Implements http://llvm.org/pr25528.

Differential Revision: http://reviews.llvm.org/D14833

llvm-svn: 253637
2015-11-20 02:32:35 +00:00
Rafael Espindola 9c8904fb38 Rename ld.lld2 to ld.lld since it is the default.
llvm-svn: 253437
2015-11-18 06:11:01 +00:00
Rafael Espindola 4b1285c55a Rename test/elf2 to test/ELF.
llvm-svn: 253313
2015-11-17 05:36:42 +00:00