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73 lines
2.5 KiB
Diff
73 lines
2.5 KiB
Diff
Index: llvm/lib/MC/MCParser/ELFAsmParser.cpp
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===================================================================
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--- a/llvm/lib/MC/MCParser/ELFAsmParser.cpp
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+++ b/llvm/lib/MC/MCParser/ELFAsmParser.cpp
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@@ -652,10 +652,13 @@
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!(SectionName == ".eh_frame" && Type == ELF::SHT_PROGBITS))
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Error(loc, "changed section type for " + SectionName + ", expected: 0x" +
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utohexstr(Section->getType()));
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- if (Section->getFlags() != Flags)
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+ // Check that flags are used consistently. However, the GNU assembler permits
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+ // to leave out in subsequent uses of the same sections; for compatibility,
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+ // do likewise.
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+ if ((Flags || Size || !TypeName.empty()) && Section->getFlags() != Flags)
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Error(loc, "changed section flags for " + SectionName + ", expected: 0x" +
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utohexstr(Section->getFlags()));
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- if (Section->getEntrySize() != Size)
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+ if ((Flags || Size || !TypeName.empty()) && Section->getEntrySize() != Size)
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Error(loc, "changed section entsize for " + SectionName +
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", expected: " + Twine(Section->getEntrySize()));
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Index: llvm/test/MC/ELF/section-entsize-changed.s
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===================================================================
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--- a/llvm/test/MC/ELF/section-entsize-changed.s
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+++ b/llvm/test/MC/ELF/section-entsize-changed.s
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@@ -10,3 +10,23 @@
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.pushsection .foo,"aM",@progbits,4
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.pushsection .foo,"aM",@progbits,1
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+
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+bar:
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+.section .bar
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+
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+# CHECK: {{.*}}.s:[[# @LINE+1]]:1: error: changed section flags for .bar, expected: 0x0
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+.section .bar,"awx",@progbits
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+
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+# CHECK: {{.*}}.s:[[# @LINE+1]]:1: error: changed section flags for .bar, expected: 0x0
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+.pushsection .bar,"a",@progbits
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+
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+.pushsection .bar
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+
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+foobar:
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+.section .foobar,"ax",@progbits
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+
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+# CHECK: {{.*}}.s:[[# @LINE+1]]:1: error: changed section flags for .foobar, expected: 0x6
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+.section .foobar,"",@progbits
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+
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+# CHECK: {{.*}}.s:[[# @LINE+1]]:1: error: changed section flags for .foobar, expected: 0x6
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+.section .foobar,"a",@progbits
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Index: llvm/test/MC/ELF/section-omitted-attributes.s
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===================================================================
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--- /dev/null
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+++ llvm/test/MC/ELF/section-omitted-attributes.s
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@@ -0,0 +1,19 @@
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+# RUN: llvm-mc -triple=x86_64 %s -o - | FileCheck %s
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+
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+# CHECK: .section .foo,"aM",@progbits,1
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+# CHECK: .section .bar,"aM",@progbits,4
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+
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+foo:
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+.section .foo,"aM",@progbits,1
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+
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+.section .foo
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+
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+.pushsection .foo
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+
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+.section .bar,"aM",@progbits,4
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+
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+.section .bar
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+
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+.pushsection .bar,"aM",@progbits,4
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+
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+.pushsection .bar
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