1# REQUIRES: x86 2## Keep st_type for simple assignment (`alias = aliasee`). This property is 3## desired on some targets, where symbol types can affect relocation processing 4## (e.g. Thumb interworking). However, the st_size field should not be retained 5## because some tools use st_size=0 as a heuristic to detect aliases. With any 6## operation, it can be argued that the new symbol may not be of the same type, 7## so reset st_type to STT_NOTYPE. 8 9## NOTE: GNU ld retains st_type for many operations. 10 11# RUN: split-file %s %t 12# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/main.s -o %t.o 13# RUN: ld.lld -T %t/a.lds %t.o -o %t1 14# RUN: llvm-readelf -s %t1 | FileCheck %s 15 16# CHECK: Size Type Bind Vis Ndx Name 17# CHECK: 1 FUNC GLOBAL DEFAULT 1 _start 18# CHECK: 0 FUNC GLOBAL DEFAULT 1 retain1 19# CHECK-NEXT: 0 FUNC GLOBAL DEFAULT 1 retain2 20# CHECK-NEXT: 0 NOTYPE GLOBAL DEFAULT 1 drop1 21# CHECK-NEXT: 0 NOTYPE GLOBAL DEFAULT ABS drop2 22# CHECK-NEXT: 0 NOTYPE GLOBAL DEFAULT ABS drop3 23 24# RUN: ld.lld --defsym 'retain=_start' --defsym 'drop=_start+0' %t.o -o %t2 25# RUN: llvm-readelf -s %t2 | FileCheck %s --check-prefix=DEFSYM 26 27# DEFSYM: 0 FUNC GLOBAL DEFAULT 1 retain 28# DEFSYM-NEXT: 0 NOTYPE GLOBAL DEFAULT 1 drop 29 30#--- a.lds 31retain1 = _start; 32retain2 = 1 ? _start : 0; 33 34## Reset to STT_NOTYPE if any operation is performed, 35## even if the operation is an identity function. 36drop1 = _start + 0; 37drop2 = 0 ? _start : 1; 38drop3 = -_start; 39 40#--- main.s 41.globl _start 42.type _start, @function 43_start: 44 ret 45.size _start, 1 46