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llvm-project/lld/test
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Fangrui Song c49f83b6e9 [ELF] Don't advance sh_offset for an empty section whose PT_LOAD is removed (due to p_memsz=0) 
removeEmptyPTLoad() removes empty (p_memsz=0) PT_LOAD segments.  In
assignFileOffsets(), setFileOffset() unnecessarily advances file offsets
for containing empty sections.

This is exposed by arm Linux kernel's multi_v5_defconfig
(see https://bugs.llvm.org/show_bug.cgi?id=45632)

```
ld.lld (max-page-size=65536):
  [34] .init.data        PROGBITS        c0c24000 c34000 0128ac 00  WA  0   0 4096
  [35] .text_itcm        PROGBITS        fffe0000 c50000 000000 00  WA  0   0  1
  [36] .data_dtcm        PROGBITS        fffe8000 c58000 000000 00  WA  0   0  1
  [37] .data             PROGBITS        c0c38000 c58000 0647a0 00  WA  0   0 32

arm-linux-gnueabi-ld (max-page-size=65536):
  [23] .init.data        PROGBITS        c0c12000 c22000 0128ac 00  WA  0   0 4096
  [24] .text_itcm        PROGBITS        fffe0000 ca2558 000000 00   W  0   0  1
  [25] .data_dtcm        PROGBITS        fffe8000 ca2558 000000 00   W  0   0  1
  [26] .data             PROGBITS        c0c26000 c36000 0647a0 00  WA  0   0 32
```

This patch clears OutputSection::ptLoad if ptLoad is removed by
removeEmptyPTLoad(). Conceptually this removes "dangling" references.

Reviewed By: psmith

Differential Revision: https://reviews.llvm.org/D79254
 		2020-05-04 08:07:34 -07:00
..
COFF [COFF] Assign unique identifiers to ObjFiles from LTO 2020-04-17 17:15:12 -07:00
Driver/Inputs
…
ELF [ELF] Don't advance sh_offset for an empty section whose PT_LOAD is removed (due to p_memsz=0) 2020-05-04 08:07:34 -07:00
MachO [lld] Merge Mach-O input sections 2020-05-01 16:57:18 -07:00
MinGW Use error instead of fatal to report usage errors 2019-10-10 09:46:41 +00:00
Unit Revert "Temporarily revert "build: use `find_package(Python3)` if available"" 2020-04-29 01:38:08 +00:00
darwin [Darwin] Do not error on '-lto_library' option 2018-06-13 18:59:14 +00:00
mach-o Reland D78837 [lld] Remove special cases from default ld driver mode. 2020-04-29 14:45:44 -07:00
wasm [WebAssmebly] Add support for defined wasm globals in MC and lld 2020-04-30 12:43:15 -07:00
CMakeLists.txt [lld-macho] Support reading of universal binaries 2020-04-29 15:44:44 -07:00
lit.cfg.py ELF: Change FileSize back to a uint64_t. 2019-03-01 18:53:41 +00:00
lit.site.cfg.py.in Revert "Temporarily revert "build: use `find_package(Python3)` if available"" 2020-04-29 01:38:08 +00:00