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This is part of PR36515. With some linkerscripts it is possible to get file offset overlaps and overflows. Currently LLD checks overlaps in checkNoOverlappingSections(). And also we allow broken output with --no-inhibit-exec. Problem is that sometimes final offset of sections is completely broken and we calculate output file size wrong and might crash. Patch implements check to verify that there is no output section which offset exceeds file size. Differential revision: https://reviews.llvm.org/D43819 llvm-svn: 327376
23 lines
932 B
Plaintext
23 lines
932 B
Plaintext
# REQUIRES: x86
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# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/sections-va-overflow.s -o %t.o
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# RUN: not ld.lld -o /dev/null --script %s %t.o 2>&1 | FileCheck %s -check-prefix=ERR
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PHDRS {
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ph_headers PT_PHDR PHDRS;
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ph_text PT_LOAD FILEHDR PHDRS FLAGS (0x1 | 0x4);
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}
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SECTIONS {
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. = 0xffffffff20000000;
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.text : { *(.text*) } : ph_text
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.test 0x1000 : { BYTE(0) }
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.bss : { *(.bss*) }
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}
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## Section .test has VA 0x1000 and placed in the same segment as section .text
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## with VA 0xffffffff20000000. That might be technically correct, but most probably
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## is a result of a broken script file and causes file offset calculation overflow.
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## It seems we do not have to support it, so we don't and we report an error in this case.
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# ERR: error: unable to place section .text at file offset [0xFFFFFFFF20000000, 0xFFFFFFFE40000000]; check your linker script for overflows
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# ERR-NOT: unable to place section .bss
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