2020-08-21 06:00:25 +08:00
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# RUN: yaml2obj %s -o %t.obj
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[COFF] Implement /safeseh:no and check @feat.00 flags by default
Summary:
Fixes PR41828. Before this, LLD always emitted SafeSEH chunks and
defined __safe_se_handler_table & size. Now, /safeseh:no leaves those
undefined.
Additionally, we were checking for the safeseh @feat.00 flag in two
places: once to emit errors, and once during safeseh table construction.
The error was set up to be off by default, but safeseh is supposed to be
on by default. I combined the two checks, so now LLD emits an error if
an input object lacks @feat.00 and safeseh is enabled. This caused the
majority of 32-bit LLD tests to fail, since many test input object files
lack @feat.00 symbols. I explicitly added -safeseh:no to those tests to
preserve behavior.
Finally, LLD no longer sets IMAGE_DLL_CHARACTERISTICS_NO_SEH if any
input file wasn't compiled for safeseh.
Reviewers: mstorsjo, ruiu, thakis
Reviewed By: ruiu, thakis
Subscribers: llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D63570
llvm-svn: 366238
2019-07-17 02:17:33 +08:00
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# RUN: lld-link -safeseh:no /out:%t.exe /entry:main %t.obj
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2015-07-10 05:15:58 +08:00
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# RUN: llvm-objdump -s %t.exe | FileCheck %s
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# CHECK: Contents of section .text:
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# CHECK-NEXT: 1000 00200000
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# CHECK: Contents of section .rdata:
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2015-07-26 05:42:33 +08:00
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# CHECK-NEXT: 2000 04104000
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2015-07-10 05:15:58 +08:00
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2016-06-28 04:17:08 +08:00
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--- !COFF
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2015-07-10 05:15:58 +08:00
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header:
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Machine: IMAGE_FILE_MACHINE_I386
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Characteristics: []
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sections:
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- Name: .text
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Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
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Alignment: 4
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SectionData: 00000000
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Relocations:
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- VirtualAddress: 0
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SymbolName: __imp__main
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Type: IMAGE_REL_I386_DIR32NB
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symbols:
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- Name: .text
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Value: 0
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SectionNumber: 1
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SimpleType: IMAGE_SYM_TYPE_NULL
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ComplexType: IMAGE_SYM_DTYPE_NULL
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StorageClass: IMAGE_SYM_CLASS_STATIC
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SectionDefinition:
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Length: 4
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NumberOfRelocations: 1
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NumberOfLinenumbers: 0
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CheckSum: 0
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Number: 0
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Selection: IMAGE_COMDAT_SELECT_ANY
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- Name: _main
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Value: 4
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SectionNumber: 1
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SimpleType: IMAGE_SYM_TYPE_NULL
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ComplexType: IMAGE_SYM_DTYPE_FUNCTION
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StorageClass: IMAGE_SYM_CLASS_EXTERNAL
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- Name: __imp__main
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Value: 0
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SectionNumber: 0
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SimpleType: IMAGE_SYM_TYPE_NULL
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ComplexType: IMAGE_SYM_DTYPE_FUNCTION
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StorageClass: IMAGE_SYM_CLASS_EXTERNAL
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...
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