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kallsyms: add symbol size for kallsyms symbols that can change size

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Add symbol size for kallsyms symbols that can change size so that sizes
can be determined easily without having to manually calculate them
when inspecting the object files (.tmp_vmlinux?.kallsyms.o or
.tmp_vmlinux?). Without, the assembler records the symbol size as 0.

This is primarily useful as a debugging aid in case of linker errors as
part of link-vmlinux.sh, and because symbol size doesn't have to align
with the offset to the next symbol due to padding/alignment.

Signed-off-by: André Draszik <andre.draszik@linaro.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nicolas Schier <nsc@kernel.org>
Signed-off-by: Nicolas Schier <nsc@kernel.org>
This commit is contained in:
André Draszik 2026-07-28 13:42:39 +01:00 committed by Nicolas Schier
parent 69ef27076d
commit d6bf11a7e8
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1 changed files with 4 additions and 0 deletions
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4
scripts/kallsyms.c
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@ -398,11 +398,13 @@ static void write_src(void)
strcpy((char *)table[i]->sym, buf);
printf("\t/* %s */\n", table[i]->sym);
}
printf(".size kallsyms_names, . - kallsyms_names\n");
printf("\n");
output_label("kallsyms_markers");
for (i = 0; i < markers_cnt; i++)
printf("\t.long\t%u\n", markers[i]);
printf(".size kallsyms_markers, . - kallsyms_markers\n");
printf("\n");
free(markers);
@ -415,6 +417,7 @@ static void write_src(void)
printf("\t.asciz\t\"%s\"\n", buf);
off += strlen(buf) + 1;
}
printf(".size kallsyms_token_table, . - kallsyms_token_table\n");
printf("\n");
output_label("kallsyms_token_index");
@ -441,6 +444,7 @@ static void write_src(void)
(unsigned int)table[i]->addr, table[i]->sym);
}
}
printf(".size kallsyms_offsets, . - kallsyms_offsets\n");
printf("\n");
sort_symbols_by_name();