b3d5bb3b30
Placing a non-SHT_NOBITS input section in an output section specified with (NOLOAD) is fishy but used by some projects. D118840 changed the output type to SHT_PROGBITS, but using the specified type seems to make more sense and improve GNU ld compatibility: `(NOLOAD)` seems to change the output section type regardless of input. I think we should keep the current type mismatch warning as it does indicate an error-prone usage. Reviewed By: peter.smith Differential Revision: https://reviews.llvm.org/D125074
50 lines
1.8 KiB
ArmAsm
50 lines
1.8 KiB
ArmAsm
# REQUIRES: x86
|
|
# RUN: split-file %s %t
|
|
# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/asm -o %t.o
|
|
# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/mismatch.s -o %t/mismatch.o
|
|
# RUN: ld.lld --script %t/lds %t.o -o %t/out
|
|
# RUN: llvm-readelf -S -l %t/out | FileCheck %s
|
|
|
|
# CHECK: Name Type Address Off Size
|
|
# CHECK: .data_noload_a NOBITS 0000000000000000 [[OFF:[0-9a-f]+]] 001000
|
|
# CHECK-NEXT: .data_noload_b NOBITS 0000000000010000 [[OFF]] 001000
|
|
# CHECK-NEXT: .no_input_sec_noload NOBITS 0000000000011000 [[OFF]] 000001
|
|
|
|
# CHECK: Type Offset VirtAddr PhysAddr
|
|
# CHECK-NEXT: LOAD 0x001000 0x0000000000000000 0x0000000000000000
|
|
# CHECK-NEXT: LOAD 0x001000 0x0000000000020000 0x0000000000020000
|
|
|
|
# CHECK: 00 .data_noload_a .data_noload_b .no_input_sec_noload {{$}}
|
|
# CHECK: 01 .text {{$}}
|
|
|
|
## The output SHT_PROBITS is contrary to the user expectation of SHT_NOBITS.
|
|
## Issue a warning. See https://github.com/ClangBuiltLinux/linux/issues/1597
|
|
# RUN: ld.lld --script %t/lds %t.o %t/mismatch.o -o %t/out 2>&1 | FileCheck %s --check-prefix=WARN
|
|
# RUN: llvm-readelf -S -l %t/out | FileCheck %s --check-prefix=CHECK2
|
|
|
|
# WARN: warning: section type mismatch for .data_noload_a
|
|
# CHECK2: Name Type Address Off Size
|
|
# CHECK2: .data_noload_a NOBITS 0000000000000000 [[OFF:[0-9a-f]+]] 001001
|
|
|
|
#--- asm
|
|
.section .text,"ax",@progbits
|
|
nop
|
|
|
|
.section .data_noload_a,"aw",@nobits
|
|
.zero 4096
|
|
|
|
.section .data_noload_b,"aw",@nobits
|
|
.zero 4096
|
|
|
|
#--- mismatch.s
|
|
.section .data_noload_a,"aw",@progbits
|
|
.byte 1
|
|
|
|
#--- lds
|
|
SECTIONS {
|
|
.data_noload_a (NOLOAD) : { *(.data_noload_a) }
|
|
.data_noload_b (0x10000) (NOLOAD) : { *(.data_noload_b) }
|
|
.no_input_sec_noload (NOLOAD) : { . += 1; }
|
|
.text (0x20000) : { *(.text) }
|
|
}
|