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https://github.com/c64scene-ar/llvm-6502.git
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Fix parsing of .symver directive on ARM
ARM assembly syntax uses @ for a comment, execpt for the second parameter of the .symver directive which requires @ as part of the symbol name. This commit fixes the parsing of this directive by adding a special case for ARM for this one argumnet. To make the change we had to move the AllowAtInIdentifier variable to the MCAsmLexer interface (from AsmLexer) and expose a setter for the value. The ELFAsmParser then toggles this value when parsing the second argument to the .symver directive for a target that uses @ as a comment symbol git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199339 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Peixotto
parent
4c831d97bf
commit
a034c96443
@ -30,7 +30,6 @@ class AsmLexer : public MCAsmLexer {
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const char *CurPtr;
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const MemoryBuffer *CurBuf;
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bool isAtStartOfLine;
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bool AllowAtInIdentifier; // Cached here to avoid repeated MAI query.
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void operator=(const AsmLexer&) LLVM_DELETED_FUNCTION;
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AsmLexer(const AsmLexer&) LLVM_DELETED_FUNCTION;
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@ -118,6 +118,7 @@ class MCAsmLexer {
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protected: // Can only create subclasses.
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const char *TokStart;
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bool SkipSpace;
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bool AllowAtInIdentifier;
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MCAsmLexer();
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@ -170,6 +171,9 @@ public:
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/// setSkipSpace - Set whether spaces should be ignored by the lexer
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void setSkipSpace(bool val) { SkipSpace = val; }
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bool getAllowAtInIdentifier() { return AllowAtInIdentifier; }
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void setAllowAtInIdentifier(bool v) { AllowAtInIdentifier = v; }
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};
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} // End llvm namespace
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@ -590,7 +590,14 @@ bool ELFAsmParser::ParseDirectiveSymver(StringRef, SMLoc) {
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if (getLexer().isNot(AsmToken::Comma))
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return TokError("expected a comma");
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// ARM assembly uses @ for a comment...
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// except when parsing the second parameter of the .symver directive.
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// Force the next symbol to allow @ in the identifier, which is
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// required for this directive and then reset it to its initial state.
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const bool AllowAtInIdentifier = getLexer().getAllowAtInIdentifier();
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getLexer().setAllowAtInIdentifier(true);
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Lex();
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getLexer().setAllowAtInIdentifier(AllowAtInIdentifier);
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StringRef AliasName;
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if (getParser().parseIdentifier(AliasName))
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152
test/MC/ARM/arm-elf-symver.s
Normal file
152
test/MC/ARM/arm-elf-symver.s
Normal file
@ -0,0 +1,152 @@
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@ RUN: llvm-mc -filetype=obj -triple arm-none-linux-gnueabi %s -o - | llvm-readobj -r -t | FileCheck %s
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@ RUN: llvm-mc -filetype=obj -triple thumb-none-linux-gnueabi %s -o - | llvm-readobj -r -t | FileCheck %s
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defined1:
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defined2:
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defined3:
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.symver defined1, bar1@zed
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.symver undefined1, bar2@zed
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.symver defined2, bar3@@zed
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.symver defined3, bar5@@@zed
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.symver undefined3, bar6@@@zed
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.long defined1
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.long undefined1
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.long defined2
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.long defined3
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.long undefined3
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.global global1
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.symver global1, g1@@zed
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global1:
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@ CHECK: Relocations [
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@ CHECK-NEXT: Section (2) .rel.text {
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@ CHECK-NEXT: 0x0 R_ARM_ABS32 defined1 0x0
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@ CHECK-NEXT: 0x4 R_ARM_ABS32 bar2@zed 0x0
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@ CHECK-NEXT: 0x8 R_ARM_ABS32 defined2 0x0
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@ CHECK-NEXT: 0xC R_ARM_ABS32 defined3 0x0
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@ CHECK-NEXT: 0x10 R_ARM_ABS32 bar6@zed 0x0
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@ CHECK-NEXT: }
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@ CHECK-NEXT: ]
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@ CHECK: Symbol {
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@ CHECK: Name: bar1@zed (28)
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@ CHECK-NEXT: Value: 0x0
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@ CHECK-NEXT: Size: 0
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@ CHECK-NEXT: Binding: Local (0x0)
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@ CHECK-NEXT: Type: None (0x0)
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@ CHECK-NEXT: Other: 0
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@ CHECK-NEXT: Section: .text (0x1)
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@ CHECK-NEXT: }
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@ CHECK-NEXT: Symbol {
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@ CHECK-NEXT: Name: bar3@@zed (46)
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@ CHECK-NEXT: Value: 0x0
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@ CHECK-NEXT: Size: 0
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@ CHECK-NEXT: Binding: Local (0x0)
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@ CHECK-NEXT: Type: None (0x0)
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@ CHECK-NEXT: Other: 0
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@ CHECK-NEXT: Section: .text (0x1)
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@ CHECK-NEXT: }
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@ CHECK-NEXT: Symbol {
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@ CHECK-NEXT: Name: bar5@@zed (56)
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@ CHECK-NEXT: Value: 0x0
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@ CHECK-NEXT: Size: 0
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@ CHECK-NEXT: Binding: Local (0x0)
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@ CHECK-NEXT: Type: None (0x0)
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@ CHECK-NEXT: Other: 0
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@ CHECK-NEXT: Section: .text (0x1)
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@ CHECK-NEXT: }
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@ CHECK-NEXT: Symbol {
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@ CHECK-NEXT: Name: defined1 (1)
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@ CHECK-NEXT: Value: 0x0
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@ CHECK-NEXT: Size: 0
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@ CHECK-NEXT: Binding: Local (0x0)
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@ CHECK-NEXT: Type: None (0x0)
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@ CHECK-NEXT: Other: 0
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@ CHECK-NEXT: Section: .text (0x1)
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@ CHECK-NEXT: }
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@ CHECK-NEXT: Symbol {
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@ CHECK-NEXT: Name: defined2 (10)
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@ CHECK-NEXT: Value: 0x0
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@ CHECK-NEXT: Size: 0
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@ CHECK-NEXT: Binding: Local (0x0)
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@ CHECK-NEXT: Type: None (0x0)
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@ CHECK-NEXT: Other: 0
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@ CHECK-NEXT: Section: .text (0x1)
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@ CHECK-NEXT: }
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@ CHECK-NEXT: Symbol {
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@ CHECK-NEXT: Name: defined3 (19)
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@ CHECK-NEXT: Value: 0x0
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@ CHECK-NEXT: Size: 0
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@ CHECK-NEXT: Binding: Local (0x0)
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@ CHECK-NEXT: Type: None (0x0)
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@ CHECK-NEXT: Other: 0
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@ CHECK-NEXT: Section: .text (0x1)
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@ CHECK-NEXT: }
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@ CHECK-NEXT: Symbol {
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@ CHECK-NEXT: Name: .text (0)
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@ CHECK-NEXT: Value: 0x0
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@ CHECK-NEXT: Size: 0
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@ CHECK-NEXT: Binding: Local (0x0)
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@ CHECK-NEXT: Type: Section (0x3)
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@ CHECK-NEXT: Other: 0
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@ CHECK-NEXT: Section: .text (0x1)
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@ CHECK-NEXT: }
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@ CHECK-NEXT: Symbol {
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@ CHECK-NEXT: Name: .data (0)
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@ CHECK-NEXT: Value: 0x0
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@ CHECK-NEXT: Size: 0
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@ CHECK-NEXT: Binding: Local (0x0)
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@ CHECK-NEXT: Type: Section (0x3)
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@ CHECK-NEXT: Other: 0
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@ CHECK-NEXT: Section: .data (0x3)
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@ CHECK-NEXT: }
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@ CHECK-NEXT: Symbol {
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@ CHECK-NEXT: Name: .bss (0)
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@ CHECK-NEXT: Value: 0x0
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@ CHECK-NEXT: Size: 0
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@ CHECK-NEXT: Binding: Local (0x0)
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@ CHECK-NEXT: Type: Section (0x3)
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@ CHECK-NEXT: Other: 0
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@ CHECK-NEXT: Section: .bss (0x4)
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@ CHECK-NEXT: }
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@ CHECK-NEXT: Symbol {
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@ CHECK-NEXT: Name: g1@@zed (88)
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@ CHECK-NEXT: Value: 0x14
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@ CHECK-NEXT: Size: 0
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@ CHECK-NEXT: Binding: Global (0x1)
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@ CHECK-NEXT: Type: None (0x0)
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@ CHECK-NEXT: Other: 0
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@ CHECK-NEXT: Section: .text (0x1)
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@ CHECK-NEXT: }
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@ CHECK-NEXT: Symbol {
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@ CHECK-NEXT: Name: global1 (80)
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@ CHECK-NEXT: Value: 0x14
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@ CHECK-NEXT: Size: 0
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@ CHECK-NEXT: Binding: Global (0x1)
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@ CHECK-NEXT: Type: None (0x0)
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@ CHECK-NEXT: Other: 0
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@ CHECK-NEXT: Section: .text (0x1)
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@ CHECK-NEXT: }
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@ CHECK-NEXT: Symbol {
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@ CHECK-NEXT: Name: bar2@zed (37)
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@ CHECK-NEXT: Value: 0x0
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@ CHECK-NEXT: Size: 0
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@ CHECK-NEXT: Binding: Global (0x1)
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@ CHECK-NEXT: Type: None (0x0)
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@ CHECK-NEXT: Other: 0
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@ CHECK-NEXT: Section: (0x0)
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@ CHECK-NEXT: }
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@ CHECK-NEXT: Symbol {
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@ CHECK-NEXT: Name: bar6@zed (66)
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@ CHECK-NEXT: Value: 0x0
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@ CHECK-NEXT: Size: 0
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@ CHECK-NEXT: Binding: Global (0x1)
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@ CHECK-NEXT: Type: None (0x0)
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@ CHECK-NEXT: Other: 0
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@ CHECK-NEXT: Section: (0x0)
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@ CHECK-NEXT: }
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@ CHECK-NEXT: ]
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@ -9,6 +9,18 @@ foo:
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.long baz@got
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add r0, r0@ignore this extra junk
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@ the symver directive should allow @ in the second symbol name
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defined1:
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defined2:
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defined3:
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bar:
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.symver defined1, bar1@zed
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.symver defined2, bar3@@zed
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.symver defined3, bar5@@@zed
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far:
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.long baz@got
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@CHECK-LABEL: foo:
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@CHECK: bl boo
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@CHECK-NOT: @
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@ -21,4 +33,15 @@ foo:
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@CHECK: add r0, r0
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@CHECK-NOT: @
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@CHECK-LABEL: bar:
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@CHECK: bar1@zed = defined1
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@CHECK: bar3@@zed = defined2
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@CHECK: bar5@@@zed = defined3
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@ Make sure we did not mess up the parser state and it still lexes
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@ comments correctly by excluding the @ in normal symbols
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@CHECK-LABEL: far:
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@CHECK: .long baz
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@CHECK-NOT: @
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@ERROR-NOT: error:
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