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objtool: Optimize layout of struct symbol

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Reduce the size of struct symbol on x86_64 from 208 to 200 bytes.
This structure is allocated a lot and never freed.

This reduces maximum memory usage while processing vmlinux.o from
2919716 KB to 2917988 KB (-0.5%) on my notebooks "localmodconfig".

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20221216-objtool-memory-v2-6-17968f85a464@weissschuh.net
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
This commit is contained in:
Thomas Weißschuh
2022-12-27 16:01:02 +00:00
committed by Josh Poimboeuf
parent 8045b8f0b1
commit 21a899f9fc
1 changed files with 2 additions and 3 deletions
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tools/objtool/include/objtool/elf.h
+2 -3
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@@ -50,12 +50,11 @@ struct symbol {
GElf_Sym sym;
struct section *sec;
char *name;
unsigned int idx;
unsigned char bind, type;
unsigned int idx, len;
unsigned long offset;
unsigned int len;
unsigned long __subtree_last;
struct symbol *pfunc, *cfunc, *alias;
unsigned char bind, type;
u8 uaccess_safe : 1;
u8 static_call_tramp : 1;
u8 retpoline_thunk : 1;