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| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2022-11-14 23:27:48 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2022-11-18 19:00:16 +1100 |
| commit | 86ea7f361537f825a699e86fdc9e49be19f128d1 (patch) | |
| tree | 522a15c0519d2abf2941ee9d48fe388959efa60b /tools/objtool/include | |
| parent | objtool: Use target file endianness instead of a compiled constant (diff) | |
| download | wireguard-linux-86ea7f361537f825a699e86fdc9e49be19f128d1.tar.xz wireguard-linux-86ea7f361537f825a699e86fdc9e49be19f128d1.zip | |
objtool: Use target file class size instead of a compiled constant
In order to allow using objtool on cross-built kernels,
determine size of long from elf data instead of using
sizeof(long) at build time.
For the time being this covers only mcount.
[Sathvika Vasireddy: Rename variable "size" to "addrsize" and function
"elf_class_size()" to "elf_class_addrsize()", and modify
create_mcount_loc_sections() function to follow reverse christmas tree
format to order local variable declarations.]
Tested-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Sathvika Vasireddy <sv@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221114175754.1131267-11-sv@linux.ibm.com
Diffstat (limited to 'tools/objtool/include')
| -rw-r--r-- | tools/objtool/include/objtool/elf.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/objtool/include/objtool/elf.h b/tools/objtool/include/objtool/elf.h index 16f4067b82ae..78b3aa2e546d 100644 --- a/tools/objtool/include/objtool/elf.h +++ b/tools/objtool/include/objtool/elf.h @@ -142,6 +142,14 @@ static inline bool has_multiple_files(struct elf *elf) return elf->num_files > 1; } +static inline int elf_class_addrsize(struct elf *elf) +{ + if (elf->ehdr.e_ident[EI_CLASS] == ELFCLASS32) + return sizeof(u32); + else + return sizeof(u64); +} + struct elf *elf_open_read(const char *name, int flags); struct section *elf_create_section(struct elf *elf, const char *name, unsigned int sh_flags, size_t entsize, int nr); |