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llvm-project/lld/test/ELF/protected-shared.s

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Produce STV_DEFAULT for symbols in shared libraries. The spec says: If a symbol definition with STV_PROTECTED visibility from a shared object is taken as resolving a reference from an executable or another shared object, the SHN_UNDEF symbol table entry created has STV_DEFAULT visibility. llvm-svn: 265792
2016-04-08 23:43:43 +08:00
// REQUIRES: x86
// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %p/Inputs/protected-shared.s -o %t2.o
// RUN: ld.lld -shared %t2.o -o %t2.so
// RUN: ld.lld %t.o %t2.so -o %t
Cleanup the handling of MustBeInDynSym and IsUsedInRegularObj. Now MustBeInDynSym is only true if the symbol really must be in the dynamic symbol table. IsUsedInRegularObj is only true if the symbol is used in a .o or -u. Not a .so or a .bc. A benefit is that this is now done almost entirilly during symbol resolution. The only exception is copy relocations because of aliases. This includes a small fix in that protected symbols in .so don't force executable symbols to be exported. This also opens the way for implementing internalize for -shared. llvm-svn: 265826
2016-04-09 02:39:03 +08:00
// RUN: llvm-readobj -t --dyn-symbols %t | FileCheck %s
Produce STV_DEFAULT for symbols in shared libraries. The spec says: If a symbol definition with STV_PROTECTED visibility from a shared object is taken as resolving a reference from an executable or another shared object, the SHN_UNDEF symbol table entry created has STV_DEFAULT visibility. llvm-svn: 265792
2016-04-08 23:43:43 +08:00
.global _start
_start:
Don't lower the visibility because of shared symbols. If a shared library has a protected symbol 'foo', that doesn't imply that the symbol 'foo' in the output should be protected or not. llvm-svn: 265794
2016-04-09 00:11:42 +08:00
.global bar
bar:
Don't depend on lld creating relocations in ro segments. We currently don't do a good job of diagnosing inputs that would require dynamic relocations to be applied to read only segments. I am about to improve lld in that area, but unfortunately we developed tests that depend on the current behavior. To make clear what is actually changing, this first patch just updates tests to not depend on the current behavior. In most cases this just means using a rw section instead of a ro one, but that unfortunately changes many addresses. llvm-svn: 268145
2016-04-30 08:49:10 +08:00
.data
.quad foo
Don't lower the visibility because of shared symbols. If a shared library has a protected symbol 'foo', that doesn't imply that the symbol 'foo' in the output should be protected or not. llvm-svn: 265794
2016-04-09 00:11:42 +08:00
// CHECK: Name: bar
// CHECK-NEXT: Value:
// CHECK-NEXT: Size: 0
// CHECK-NEXT: Binding: Global
// CHECK-NEXT: Type: None
// CHECK-NEXT: Other: 0
// CHECK-NEXT: Section: .text
Produce STV_DEFAULT for symbols in shared libraries. The spec says: If a symbol definition with STV_PROTECTED visibility from a shared object is taken as resolving a reference from an executable or another shared object, the SHN_UNDEF symbol table entry created has STV_DEFAULT visibility. llvm-svn: 265792
2016-04-08 23:43:43 +08:00
// CHECK: Name: foo
// CHECK-NEXT: Value: 0x0
// CHECK-NEXT: Size: 0
// CHECK-NEXT: Binding: Global
// CHECK-NEXT: Type: None
// CHECK-NEXT: Other: 0
// CHECK-NEXT: Section: Undefined
Cleanup the handling of MustBeInDynSym and IsUsedInRegularObj. Now MustBeInDynSym is only true if the symbol really must be in the dynamic symbol table. IsUsedInRegularObj is only true if the symbol is used in a .o or -u. Not a .so or a .bc. A benefit is that this is now done almost entirilly during symbol resolution. The only exception is copy relocations because of aliases. This includes a small fix in that protected symbols in .so don't force executable symbols to be exported. This also opens the way for implementing internalize for -shared. llvm-svn: 265826
2016-04-09 02:39:03 +08:00
// CHECK: DynamicSymbols [
// CHECK-NEXT: Symbol {
// CHECK-NEXT: Name: @
// CHECK-NEXT: Value: 0x0
// CHECK-NEXT: Size: 0
// CHECK-NEXT: Binding: Local (0x0)
// CHECK-NEXT: Type: None (0x0)
// CHECK-NEXT: Other: 0
// CHECK-NEXT: Section: Undefined (0x0)
// CHECK-NEXT: }
// CHECK-NEXT: Symbol {
// CHECK-NEXT: Name: foo@
// CHECK-NEXT: Value: 0x0
// CHECK-NEXT: Size: 0
// CHECK-NEXT: Binding: Global
// CHECK-NEXT: Type: None
// CHECK-NEXT: Other: 0
// CHECK-NEXT: Section: Undefined
// CHECK-NEXT: }
// CHECK-NEXT: ]