0edc8b59ab
When using `-no-pie` without a `SECTIONS` command, the linker uses the target's default image base. If `-Ttext=` or `--section-start` specifies an output section address below this base, the result is likely unintended. - With `--no-rosegment`, the PT_LOAD segment covering the ELF header cannot include `.text` if `.text`'s address is too low, causing an `error: output file too large`. - With default `--rosegment`: - If a read-only section (e.g., `.rodata`) exists, a similar `error: output file too large` occurs. - Without read-only sections, the PT_LOAD segment covering the ELF header and program headers includes no sections, which is unusual and likely undesired. This also causes non-ascending PT_LOAD `p_vaddr` values related to the PT_LOAD that overlaps with PT_PHDR (#138584). To prevent these issues, report an error if a section address is below the image base and suggest `--image-base`. This check also applies when `--image-base` is explicitly set but is skipped when a `SECTIONS` command is used. Pull Request: https://github.com/llvm/llvm-project/pull/140187
73 lines
3.0 KiB
ArmAsm
73 lines
3.0 KiB
ArmAsm
# REQUIRES: x86
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# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
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# RUN: not ld.lld %t.o --section-start .text=0x100000 \
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# RUN: --section-start=.data=0x110000 --section-start .bss=0x200000
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# RUN: ld.lld %t.o --section-start .text=0x100000 \
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# RUN: --section-start=.data=0x110000 --section-start .bss=0x200000 --noinhibit-exec -o %t 2>&1 | \
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# RUN: FileCheck %s --check-prefix=LINK --implicit-check-not=warning:
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# RUN: llvm-objdump --section-headers %t | FileCheck %s
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# LINK: warning: section '.text' address (0x100000) is smaller than image base (0x200000); specify --image-base
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# LINK-NEXT: warning: section '.data' address (0x110000) is smaller than image base (0x200000); specify --image-base
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# CHECK: Sections:
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# CHECK-NEXT: Idx Name Size VMA Type
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# CHECK-NEXT: 0 00000000 0000000000000000
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# CHECK-NEXT: 1 .text 00000001 0000000000100000 TEXT
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# CHECK-NEXT: 2 .data 00000004 0000000000110000 DATA
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# CHECK-NEXT: 3 .bss 00000004 0000000000200000 BSS
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## The errors go away when the image base is 0.
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# RUN: ld.lld %t.o -pie --section-start .text=0x100000 \
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# RUN: --section-start=.data=0x110000 --section-start .bss=0x200000 -o %t 2>&1 | count 0
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# RUN: llvm-objdump --section-headers %t | FileCheck %s
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## The same, but dropped "0x" prefix. Specify a smaller --image-base to suppress warnings.
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# RUN: ld.lld %t.o --image-base=0x90000 --section-start .text=100000 \
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# RUN: --section-start .data=110000 --section-start .bss=0x200000 -o %t1 2>&1 | count 0
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# RUN: llvm-objdump --section-headers %t1 | FileCheck %s
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## Use -Ttext, -Tdata, -Tbss as replacement for --section-start:
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# RUN: ld.lld %t.o --image-base=0x90000 -Ttext=0x100000 -Tdata=0x110000 -Tbss=0x200000 -o %t4
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# RUN: llvm-objdump --section-headers %t4 | FileCheck %s
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## The same, but dropped "0x" prefix.
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# RUN: ld.lld %t.o --image-base=0x90000 -Ttext=100000 -Tdata=110000 -Tbss=200000 -o %t5
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# RUN: llvm-objdump --section-headers %t5 | FileCheck %s
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## Check form without assignment:
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# RUN: ld.lld %t.o --image-base=0x90000 -Ttext 0x100000 -Tdata 0x110000 -Tbss 0x200000 -o %t4
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# RUN: llvm-objdump --section-headers %t4 | FileCheck %s
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## Errors:
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# RUN: not ld.lld %t.o --section-start .text100000 -o /dev/null 2>&1 \
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# RUN: | FileCheck -check-prefix=ERR1 %s
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# ERR1: invalid argument: --section-start .text100000
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# RUN: not ld.lld %t.o --section-start .text=1Q0000 -o /dev/null 2>&1 \
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# RUN: | FileCheck -check-prefix=ERR2 %s
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# ERR2: invalid argument: --section-start .text=1Q0000
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# RUN: not ld.lld %t.o -Ttext=1w0000 -o /dev/null 2>&1 \
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# RUN: | FileCheck -check-prefix=ERR3 %s
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# ERR3: invalid argument: -Ttext=1w0000
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# RUN: not ld.lld %t.o -Tbss=1w0000 -o /dev/null 2>&1 \
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# RUN: | FileCheck -check-prefix=ERR4 %s
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# ERR4: invalid argument: -Tbss=1w0000
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# RUN: not ld.lld %t.o -Tdata=1w0000 -o /dev/null 2>&1 \
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# RUN: | FileCheck -check-prefix=ERR5 %s
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# ERR5: invalid argument: -Tdata=1w0000
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.text
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.globl _start
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_start:
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nop
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.data
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.long 0
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.bss
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.zero 4
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