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kbuild: in the section mismatch check try harder to find symbols

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When searching for symbols the only check performed was if
offset equals st_value. Adding an additional check to see if st_name
points t a valid name made us sort out a few more false positives and
let us report more correct names in warnings.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Sam Ravnborg 2006-03-05 12:02:46 +01:00
parent e835a39c1c
commit 43c74d1795
1 changed files with 16 additions and 1 deletions
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17
scripts/mod/modpost.c
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@ -558,7 +558,10 @@ static Elf_Sym *find_elf_symbol(struct elf_info *elf, Elf_Addr addr,
}
/*
* Find symbols before or equal addr and after addr - in the section sec
* Find symbols before or equal addr and after addr - in the section sec.
* If we find two symbols with equal offset prefer one with a valid name.
* The ELF format may have a better way to detect what type of symbol
* it is, but this works for now.
**/
static void find_symbols_between(struct elf_info *elf, Elf_Addr addr,
const char *sec,
@ -587,6 +590,12 @@ static void find_symbols_between(struct elf_info *elf, Elf_Addr addr,
beforediff = addr - sym->st_value;
*before = sym;
}
else if ((addr - sym->st_value) == beforediff) {
/* equal offset, valid name? */
const char *name = elf->strtab + sym->st_name;
if (name && strlen(name))
*before = sym;
}
}
else
{
@ -594,6 +603,12 @@ static void find_symbols_between(struct elf_info *elf, Elf_Addr addr,
afterdiff = sym->st_value - addr;
*after = sym;
}
else if ((sym->st_value - addr) == afterdiff) {
/* equal offset, valid name? */
const char *name = elf->strtab + sym->st_name;
if (name && strlen(name))
*after = sym;
}
}
}
}