derek.holloway
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58 lines
2.1 KiB
Plaintext
58 lines
2.1 KiB
Plaintext
# REQUIRES: x86
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## Test ELF header and phdrs allocation. Also check that SIZEOF_HEADERS as a
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## symbol value matches the post-layout address.
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# RUN: rm -rf %t && split-file %s %t && cd %t
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# RUN: llvm-mc -filetype=obj -triple=x86_64 a.s -o a.o
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## Fits: . leaves enough room below the first alloc section, same page.
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# RUN: ld.lld -T fit.t a.o -o fit
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# RUN: llvm-readelf -ls fit | FileCheck %s --check-prefix=FIT
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## After .text's alignment is applied, `min` is 4 bytes below headerSize => headers dropped.
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# RUN: ld.lld -T nofit.t a.o -o nofit
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# RUN: llvm-readelf -l nofit | FileCheck %s --check-prefix=NOFIT
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## min is page-aligned, base = alignDown(min, page) = min, so min - base == 0
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## and allocating would add a whole page => headers dropped.
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# RUN: ld.lld -T page.t a.o -o page -z max-page-size=0x1000
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# RUN: llvm-readelf -l page | FileCheck %s --check-prefix=NOFIT
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## Explicit FILEHDR/PHDRS but headers cannot fit => error.
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# RUN: not ld.lld -T explicit-nofit.t a.o 2>&1 | FileCheck %s --check-prefix=ERR
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# ERR: error: could not allocate headers
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# FIT: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
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# FIT-NEXT: PHDR 0x000040 0x0000000000000040 0x0000000000000040 0x0000e0 0x0000e0 R 0x8
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# FIT-NEXT: LOAD 0x000000 0x0000000000000000 0x0000000000000000 0x000120 0x000120 R 0x1000
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# FIT-NEXT: LOAD 0x000120 0x0000000000000120 0x0000000000000120 0x000001 0x000001 R E 0x1000
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# FIT: 0000000000000120 0 NOTYPE GLOBAL DEFAULT 1 _start
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# FIT-NEXT: 0000000000000120 0 NOTYPE GLOBAL DEFAULT ABS _size
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# NOFIT: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
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# NOFIT-NEXT: LOAD
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# NOFIT-NOT: PHDR
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#--- a.s
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.globl _start
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_start:
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ret
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#--- fit.t
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SECTIONS {
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. = SIZEOF_HEADERS;
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_size = SIZEOF_HEADERS;
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.text : { *(.text) }
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}
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#--- nofit.t
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SECTIONS { . = SIZEOF_HEADERS - 4; .text : { *(.text) } }
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#--- page.t
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SECTIONS { . = 0x1000; .text : { *(.text) } }
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#--- explicit-nofit.t
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PHDRS { foobar PT_LOAD FILEHDR PHDRS; }
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SECTIONS { .text : { *(.text) } : foobar }
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