kernel/linux.git/arch/powerpc/tools, branch v6.1.168

powerpc/64: Add UADDR64 relocation support

2022-03-09T10:47:53+00:00

When ld detects unaligned relocations, it emits R_PPC64_UADDR64 relocations instead of R_PPC64_RELATIVE. Currently R_PPC64_UADDR64 are detected by arch/powerpc/tools/relocs_check.sh and expected not to work. Below is a simple chunk to trigger this behaviour (this disables optimization for the demonstration purposes only, this also happens with -O1/-O2 when CONFIG_PRINTK_INDEX=y, for example): \#pragma GCC push_options \#pragma GCC optimize ("O0") struct entry { const char *file; int line; } __attribute__((packed)); static const struct entry e1 = { .file = __FILE__, .line = __LINE__ }; static const struct entry e2 = { .file = __FILE__, .line = __LINE__ }; ... prom_printf("e1=%s %lx %lx\n", e1.file, (unsigned long) e1.file, mfmsr()); prom_printf("e2=%s %lx\n", e2.file, (unsigned long) e2.file); \#pragma GCC pop_options This adds support for UADDR64 for 64bit. This reuses __dynamic_symtab from the 32bit code which supports more relocation types already. Because RELACOUNT includes only R_PPC64_RELATIVE, this replaces it with RELASZ which is the size of all relocation records. Signed-off-by: Alexey Kardashevskiy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220309061822.168173-1-aik@ozlabs.ru

powerpc/head_check: Fix shellcheck errors

2021-08-17T12:52:02+00:00

Replace "cat file | grep pattern" with "grep pattern file", and quote a few variables. Together that fixes all shellcheck errors. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210817125154.3369884-1-mpe@ellerman.id.au

powerpc/head_check: use stdout for error messages

2021-08-16T06:28:14+00:00

Prefer stderr instead of stdout for error messages. This is a good practice and can help CI error detecting and reporting (0day in this case). Signed-off-by: Randy Dunlap Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210815222334.9575-1-rdunlap@infradead.org

powerpc/tools: Remove 90 line limit in checkpatch script

2020-09-08T12:57:11+00:00

As of commit bdc48fa11e46, scripts/checkpatch.pl now has a default line length warning of 100 characters. The powerpc wrapper script was using a length of 90 instead of 80 in order to make checkpatch less restrictive, but now it's making it more restrictive instead. I think it makes sense to just use the default value now. Signed-off-by: Russell Currey Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200828020542.393022-1-ruscur@russell.cc

powerpc: unrel_branch_check.sh: enable the use of llvm-objdump v9, 10 or 11

2020-09-02T01:00:22+00:00

Currently, using llvm-objtool, this script just silently succeeds without actually do the intended checking. So this updates it to work properly. Firstly, llvm-objdump does not add target symbol names to the end of branches in its asm output, so we have to drop the branch to __start_initialization_multiplatform using its address. Secondly, v9 and 10 specify branch targets as .+, so we convert those to actual addresses. Thirdly, v10 and 11 error out on a vmlinux if given the -R option complaining that it is "not a dynamic object". The -R does not make any difference to the asm output, so remove it. Lastly, v11 produces asm that is very similar to Gnu objtool (at least as far as branches are concerned), so no further changes are necessary to make it work. Signed-off-by: Stephen Rothwell Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200812081036.7969-3-sfr@canb.auug.org.au

powerpc: unrel_branch_check.sh: use nm to find symbol value

2020-09-02T01:00:22+00:00

This is considerably faster then parsing the objdump asm output. It will also make the enabling of llvm-objdump a little easier. Signed-off-by: Stephen Rothwell Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200812081036.7969-2-sfr@canb.auug.org.au

powerpc: unrel_branch_check.sh: exit silently for early errors

2020-09-02T01:00:22+00:00

If we can't find the address of __end_interrupts, then we still exit successfully as that is the current behaviour. Signed-off-by: Stephen Rothwell Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200811140435.20957-8-sfr@canb.auug.org.au

powerpc: unrel_branch_check.sh: fix up the file header

2020-09-02T01:00:22+00:00

Signed-off-by: Stephen Rothwell Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200811140435.20957-7-sfr@canb.auug.org.au

powerpc: unrel_branch_check.sh: simplify and tidy up the final loop

2020-09-02T01:00:22+00:00

Signed-off-by: Stephen Rothwell Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200811140435.20957-6-sfr@canb.auug.org.au

powerpc: unrel_branch_check.sh: convert grep | sed | awk to just sed

2020-09-02T01:00:22+00:00

Also start using sed -E and make all the separate expressions into a single one with comments. Pull the stripping of condition registers back into the sed command. Signed-off-by: Stephen Rothwell Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200811140435.20957-5-sfr@canb.auug.org.au