llvm-6502/bad-darwin-x86_64-reloc-expr2.s at b44e43623df07c10fbc3a32a216e3f710d3cc4a8 - llvm-6502 - Applefritter: Git

6502/llvm-6502

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Kevin Enderby 44ccedc273 Fix a Mach-O assembler segfault for a subtraction expression with an undefined symbol.

In a Mach-O object file a relocatable expression of the form
SymbolA - SymbolB + constant is allowed when both symbols are
defined in a section.  But when either symbol is undefined it
is an error.

The code was crashing when it had an undefined symbol in this case.
And should have printed a error message using the location information
in the relocation entry.

rdar://18678402


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220599 91177308-0d34-0410-b5e6-96231b3b80d8

2014-10-24 22:39:40 +00:00

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 // RUN: not llvm-mc -triple x86_64-apple-darwin10 %s -filetype=obj -o - 2> %t.err > %t
 // RUN: FileCheck --check-prefix=CHECK-ERROR < %t.err %s
 _Z:
 .long (_a+4)-_Z
 // CHECK-ERROR: error: unsupported relocation with subtraction expression, symbol '_a' can not be undefined in a subtraction expression