// __tls_get_addr is defined by the dynamic linker for dynamic ELFs. For
// static linking the linker is required to optimize away any references to
// __tls_get_addr, so it's not defined anywhere. Create a hidden definition
- // to avoid the undefined symbol error. As usual as special case is MIPS -
- // MIPS libc defines __tls_get_addr itself because there are no TLS
- // optimizations for this target.
- if (!Out<ELFT>::DynSymTab && Config->EMachine != EM_MIPS)
+ // to avoid the undefined symbol error. As usual special cases are ARM and
+ // MIPS - the libc for these targets defines __tls_get_addr itself because
+ // there are no TLS optimizations for these targets.
+ if (!Out<ELFT>::DynSymTab &&
+ (Config->EMachine != EM_MIPS && Config->EMachine != EM_ARM))
Symtab<ELFT>::X->addIgnored("__tls_get_addr");
// If linker script do layout we do not need to create any standart symbols.
Out<ELFT>::PreinitArray);
Define("__init_array_start", "__init_array_end", Out<ELFT>::InitArray);
Define("__fini_array_start", "__fini_array_end", Out<ELFT>::FiniArray);
+
+ if (OutputSectionBase<ELFT> *Sec = findSection(".ARM.exidx"))
+ Define("__exidx_start", "__exidx_end", Sec);
}
// If a section name is valid as a C identifier (which is rare because of
--- /dev/null
+// RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t
+// RUN: ld.lld %t --static -o %t2 2>&1
+// RUN: llvm-readobj --symbols %t2 | FileCheck %s
+// REQUIRES: arm
+
+// Check that on ARM we don't get a multiply defined symbol for __tls_get_addr
+// and undefined symbols for references to __exidx_start and __exidx_end
+ .syntax unified
+.section .text
+ .global __tls_get_addr
+__tls_get_addr:
+ bx lr
+
+ .global _start
+ .global __exidx_start
+ .global __exidx_end
+_start:
+ .fnstart
+ bx lr
+ .word __exidx_start
+ .word __exidx_end
+ .cantunwind
+ .fnend
+
+// CHECK: Name: __exidx_end
+// CHECK-NEXT: Value: 0x100DC
+// CHECK-NEXT: Size: 0
+// CHECK-NEXT: Binding: Local
+// CHECK-NEXT: Type: None
+// CHECK-NEXT: Other [
+// CHECK-NEXT: STV_HIDDEN
+// CHECK-NEXT: ]
+// CHECK-NEXT: Section: .ARM.exidx
+// CHECK: Name: __exidx_start
+// CHECK-NEXT: Value: 0x100D4
+// CHECK-NEXT: Size: 0
+// CHECK-NEXT: Binding: Local
+// CHECK-NEXT: Type: None
+// CHECK-NEXT: Other [
+// CHECK-NEXT: STV_HIDDEN
+// CHECK-NEXT: ]
+// CHECK-NEXT: Section: .ARM.exidx
+// CHECK: Symbol {
+// CHECK-NEXT: Name: __tls_get_addr