[lld] r310607 - [ELF, LinkerScript] Support ! operator in linker script.
Hafiz Abid Qadeer via llvm-commits
llvm-commits at lists.llvm.org
Thu Aug 10 08:25:47 PDT 2017
Author: abidh
Date: Thu Aug 10 08:25:47 2017
New Revision: 310607
URL: http://llvm.org/viewvc/llvm-project?rev=310607&view=rev
Log:
[ELF, LinkerScript] Support ! operator in linker script.
Summary: This small patch adds the support for ! operator in linker scripts.
Reviewers: ruiu, rafael
Reviewed By: ruiu
Subscribers: meadori, grimar, emaste, llvm-commits
Differential Revision: https://reviews.llvm.org/D36451
Modified:
lld/trunk/ELF/ScriptLexer.cpp
lld/trunk/ELF/ScriptParser.cpp
lld/trunk/test/ELF/linkerscript/symbol-assignexpr.s
Modified: lld/trunk/ELF/ScriptLexer.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/ScriptLexer.cpp?rev=310607&r1=310606&r2=310607&view=diff
==============================================================================
--- lld/trunk/ELF/ScriptLexer.cpp (original)
+++ lld/trunk/ELF/ScriptLexer.cpp Thu Aug 10 08:25:47 2017
@@ -168,7 +168,7 @@ bool ScriptLexer::atEOF() { return Error
// Split a given string as an expression.
// This function returns "3", "*" and "5" for "3*5" for example.
static std::vector<StringRef> tokenizeExpr(StringRef S) {
- StringRef Ops = "+-*/:"; // List of operators
+ StringRef Ops = "+-*/:!"; // List of operators
// Quoted strings are literal strings, so we don't want to split it.
if (S.startswith("\""))
@@ -189,9 +189,14 @@ static std::vector<StringRef> tokenizeEx
if (E != 0)
Ret.push_back(S.substr(0, E));
- // Get the operator as a token.
- Ret.push_back(S.substr(E, 1));
- S = S.substr(E + 1);
+ // Get the operator as a token. Keep != as one token.
+ if (S.substr(E).startswith("!=")) {
+ Ret.push_back(S.substr(E, 2));
+ S = S.substr(E + 2);
+ } else {
+ Ret.push_back(S.substr(E, 1));
+ S = S.substr(E + 1);
+ }
}
return Ret;
}
Modified: lld/trunk/ELF/ScriptParser.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/ScriptParser.cpp?rev=310607&r1=310606&r2=310607&view=diff
==============================================================================
--- lld/trunk/ELF/ScriptParser.cpp (original)
+++ lld/trunk/ELF/ScriptParser.cpp Thu Aug 10 08:25:47 2017
@@ -884,6 +884,10 @@ Expr ScriptParser::readPrimary() {
Expr E = readPrimary();
return [=] { return ~E().getValue(); };
}
+ if (consume("!")) {
+ Expr E = readPrimary();
+ return [=] { return !E().getValue(); };
+ }
if (consume("-")) {
Expr E = readPrimary();
return [=] { return -E().getValue(); };
Modified: lld/trunk/test/ELF/linkerscript/symbol-assignexpr.s
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/ELF/linkerscript/symbol-assignexpr.s?rev=310607&r1=310606&r2=310607&view=diff
==============================================================================
--- lld/trunk/test/ELF/linkerscript/symbol-assignexpr.s (original)
+++ lld/trunk/test/ELF/linkerscript/symbol-assignexpr.s Thu Aug 10 08:25:47 2017
@@ -15,6 +15,9 @@
# RUN: symbol11 = ((0x28000 + 0x1fff) & ~(0x1000 + -1)); \
# RUN: symbol12 = 0x1234; \
# RUN: symbol12 += 1; \
+# RUN: symbol13 = !1; \
+# RUN: symbol14 = !0; \
+# RUN: symbol15 = 0!=1; \
# RUN: bar = 0x5678; \
# RUN: baz = 0x9abc; \
# RUN: }" > %t.script
@@ -39,6 +42,9 @@
# CHECK-NEXT: fedcba9876543210 *ABS* 00000000 symbol10
# CHECK-NEXT: 0000000000029000 *ABS* 00000000 symbol11
# CHECK-NEXT: 0000000000001235 *ABS* 00000000 symbol12
+# CHECK-NEXT: 0000000000000000 *ABS* 00000000 symbol13
+# CHECK-NEXT: 0000000000000001 *ABS* 00000000 symbol14
+# CHECK-NEXT: 0000000000000001 *ABS* 00000000 symbol15
# RUN: echo "SECTIONS { symbol2 = symbol; }" > %t2.script
# RUN: not ld.lld -o %t2 --script %t2.script %t 2>&1 \
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