Summary: | binutils: ld: KEEP ignored | ||
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Product: | binutils | Reporter: | Heinrich Schuchardt <xypron.glpk> |
Component: | ld | Assignee: | Not yet assigned to anyone <unassigned> |
Status: | RESOLVED INVALID | ||
Severity: | normal | CC: | jrtc27, xypron.glpk |
Priority: | P2 | ||
Version: | 2.37 | ||
Target Milestone: | --- | ||
Host: | Target: | ||
Build: | Last reconfirmed: | ||
Attachments: | Test files |
add me to cc set component: ld 1. That's because you need -Wl,--whole-archive to include all .o files in the .a 2. Don't put a dot in the section names, make them valid C identifiers and use the linker-generated __start_$section/__stop_$section names 3. You will need -Wl,-z,nostart-stop-gc for LLD 13+ because the maintainer decided breaking coding patterns that have worked for decades is fine (binutils also accepts the flag as of 2.37 but does not currently default to the broken behaviour) If you want a BSD-2-Clause-licensed linker set implementation you can grab sys/sys/linker_set.h from FreeBSD and alter it however you like. > The expected behavior is that unreferenced sections .sbilist* are retained due to > the KEEP statement.
Your expectation is not correct. KEEP is for controlling garbage collection of sections part of objects loaded by ld. The behaviour of unix archives is orthogonal to this, as Jessica commented.
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Created attachment 13684 [details] Test files I am running ld on RISC-V or riscv64-linux-gnu-ld on x86_64 Ubuntu package version: binutils-riscv64-linux-gnu 2.37-7ubuntu1 binutils 2.37-7ubuntu1 SUSE package version: binutils-2.37-1.1.riscv64 I have a linker script with a KEEP() statement grep -GHrn KEEP *.ld fw_dynamic.elf.ld:48: KEEP(*(SORT(.sbilist*))) and a static library with multiple sections .sbilist* with non-zero size: objdump -h libplatsbi.a | grep sbilist 3 .sbilist_fdtreset_1_ 00000000 0000000000000000 0000000000000000 000001b0 2**3 4 .sbilist_fdtreset_3_ 00000000 0000000000000000 0000000000000000 000001b0 2**3 6 .sbilist_fdtreset_2_gpio_poweroff 00000010 0000000000000000 0000000000000000 00000498 2**3 7 .discard.sbilist 00000010 0000000000000000 0000000000000000 000004a8 2**3 8 .sbilist_fdtreset_2_gpio_reset 00000010 0000000000000000 0000000000000000 000004b8 2**3 5 .sbilist_fdtreset_2_htif 00000010 0000000000000000 0000000000000000 000000a0 2**3 6 .discard.sbilist 00000008 0000000000000000 0000000000000000 000000b0 2**3 5 .sbilist_fdtreset_2_sifive 00000010 0000000000000000 0000000000000000 000000d0 2**3 6 .discard.sbilist 00000008 0000000000000000 0000000000000000 000000e0 2**3 6 .sbilist_fdtreset_2_sunxi_wdt 00000010 0000000000000000 0000000000000000 000001d8 2**3 7 .discard.sbilist 00000008 0000000000000000 0000000000000000 000001e8 2**3 6 .sbilist_fdtreset_2_thead 00000010 0000000000000000 0000000000000000 000006e8 2**3 7 .discard.sbilist 00000008 0000000000000000 0000000000000000 000006f8 2**3 When linking using the linker script ld -T fw_dynamic.elf.ld \ fw_dynamic.o libplatsbi.a \ -o fw_dynamic.elf only referenced .sbilist* sections ends up in the elf file. objdump -h fw_dynamic.elf | grep sbilist 6 .sbilist 00000010 0000000080021ba0 0000000080021ba0 00022ba0 2**3 The expected behavior is that unreferenced sections .sbilist* are retained due to the KEEP statement. The test files are appended.