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| author | Masahiro Yamada <masahiroy@kernel.org> | 2023-06-20 21:05:21 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2023-06-25 23:12:20 +0900 |
| commit | 8e86ebefdd5ca15458fcb3a03da89ab9cad6382b (patch) | |
| tree | faba256667adb429ecdd19b093715ae1545774d3 /scripts | |
| parent | 8aa00e2c3da470c82148f64b6a3cac2d79bb9d16 (diff) | |
| download | lwn-8e86ebefdd5ca15458fcb3a03da89ab9cad6382b.tar.gz lwn-8e86ebefdd5ca15458fcb3a03da89ab9cad6382b.zip | |
modpost: continue even with unknown relocation type
Currently, unknown relocation types are just skipped.
The value of r_addend is only needed to get the symbol name in case
is_valid_name(elf, sym) returns false.
Even if we do not know how to calculate r_addend, we should continue.
At worst, we will get "(unknown)" as the symbol name, but it is better
than failing to detect section mismatches.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/mod/modpost.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index bfe26b835db2..73f4f5588b67 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -1267,6 +1267,8 @@ static int addend_386_rel(uint32_t *location, Elf_Rela *r) case R_386_PC32: r->r_addend = TO_NATIVE(*location) + 4; break; + default: + r->r_addend = (Elf_Addr)(-1); } return 0; } @@ -1382,7 +1384,7 @@ static int addend_arm_rel(void *loc, Elf_Sym *sym, Elf_Rela *r) r->r_addend = offset + sym->st_value + 4; break; default: - return 1; + r->r_addend = (Elf_Addr)(-1); } return 0; } @@ -1392,8 +1394,6 @@ static int addend_mips_rel(uint32_t *location, Elf_Rela *r) unsigned int r_typ = ELF_R_TYPE(r->r_info); uint32_t inst; - if (r_typ == R_MIPS_HI16) - return 1; /* skip this */ inst = TO_NATIVE(*location); switch (r_typ) { case R_MIPS_LO16: @@ -1405,6 +1405,8 @@ static int addend_mips_rel(uint32_t *location, Elf_Rela *r) case R_MIPS_32: r->r_addend = inst; break; + default: + r->r_addend = (Elf_Addr)(-1); } return 0; } @@ -1514,20 +1516,17 @@ static void section_rel(struct module *mod, struct elf_info *elf, r.r_addend = 0; loc = sym_get_data_by_offset(elf, fsecndx, r.r_offset); - tsym = elf->symtab_start + ELF_R_SYM(r.r_info); + tsym = elf->symtab_start + r_sym; switch (elf->hdr->e_machine) { case EM_386: - if (addend_386_rel(loc, &r)) - continue; + addend_386_rel(loc, &r); break; case EM_ARM: - if (addend_arm_rel(loc, tsym, &r)) - continue; + addend_arm_rel(loc, tsym, &r); break; case EM_MIPS: - if (addend_mips_rel(loc, &r)) - continue; + addend_mips_rel(loc, &r); break; default: fatal("Please add code to calculate addend for this architecture\n"); |