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modpost: add handler function pointer to sectioncheck.

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This will be useful when we want to have special handlers which need to go
through more hops to print useful information to the user.

Signed-off-by: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Quentin Casasnovas 2015-04-13 20:43:17 +09:30 committed by Rusty Russell
parent 157d1972d0
commit 644e8f14cb
1 changed files with 42 additions and 26 deletions
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68
scripts/mod/modpost.c
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@ -930,6 +930,10 @@ struct sectioncheck {
const char *good_tosec[20];
enum mismatch mismatch;
const char *symbol_white_list[20];
void (*handler)(const char *modname, struct elf_info *elf,
const struct sectioncheck* const mismatch,
Elf_Rela *r, Elf_Sym *sym, const char *fromsec);
};
static const struct sectioncheck sectioncheck[] = {
@ -1417,37 +1421,49 @@ static void report_sec_mismatch(const char *modname,
fprintf(stderr, "\n");
}
static void default_mismatch_handler(const char *modname, struct elf_info *elf,
const struct sectioncheck* const mismatch,
Elf_Rela *r, Elf_Sym *sym, const char *fromsec)
{
const char *tosec;
Elf_Sym *to;
Elf_Sym *from;
const char *tosym;
const char *fromsym;
tosec = sec_name(elf, get_secindex(elf, sym));
from = find_elf_symbol2(elf, r->r_offset, fromsec);
fromsym = sym_name(elf, from);
to = find_elf_symbol(elf, r->r_addend, sym);
tosym = sym_name(elf, to);
if (!strncmp(fromsym, "reference___initcall",
sizeof("reference___initcall")-1))
return;
/* check whitelist - we may ignore it */
if (secref_whitelist(mismatch,
fromsec, fromsym, tosec, tosym)) {
report_sec_mismatch(modname, mismatch,
fromsec, r->r_offset, fromsym,
is_function(from), tosec, tosym,
is_function(to));
}
}
static void check_section_mismatch(const char *modname, struct elf_info *elf,
Elf_Rela *r, Elf_Sym *sym, const char *fromsec)
{
const char *tosec;
const struct sectioncheck *mismatch;
const char *tosec = sec_name(elf, get_secindex(elf, sym));;
const struct sectioncheck *mismatch = section_mismatch(fromsec, tosec);
tosec = sec_name(elf, get_secindex(elf, sym));
mismatch = section_mismatch(fromsec, tosec);
if (mismatch) {
Elf_Sym *to;
Elf_Sym *from;
const char *tosym;
const char *fromsym;
from = find_elf_symbol2(elf, r->r_offset, fromsec);
fromsym = sym_name(elf, from);
to = find_elf_symbol(elf, r->r_addend, sym);
tosym = sym_name(elf, to);
if (!strncmp(fromsym, "reference___initcall",
sizeof("reference___initcall")-1))
return;
/* check whitelist - we may ignore it */
if (secref_whitelist(mismatch,
fromsec, fromsym, tosec, tosym)) {
report_sec_mismatch(modname, mismatch,
fromsec, r->r_offset, fromsym,
is_function(from), tosec, tosym,
is_function(to));
}
if (mismatch->handler)
mismatch->handler(modname, elf, mismatch,
r, sym, fromsec);
else
default_mismatch_handler(modname, elf, mismatch,
r, sym, fromsec);
}
}