Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool fix from Thomas Gleixner: "A single fix for objtool to address a bug in handling the cold subfunction detection for aliased functions which was added recently. The bug causes objtool to enter an infinite loop" * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: objtool: Support GCC 8 '-fnoreorder-functions'
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commit
f5c926b99e
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@ -302,19 +302,34 @@ static int read_symbols(struct elf *elf)
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continue;
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sym->pfunc = sym->cfunc = sym;
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coldstr = strstr(sym->name, ".cold.");
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if (coldstr) {
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coldstr[0] = '\0';
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pfunc = find_symbol_by_name(elf, sym->name);
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coldstr[0] = '.';
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if (!coldstr)
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continue;
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if (!pfunc) {
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WARN("%s(): can't find parent function",
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sym->name);
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goto err;
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}
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coldstr[0] = '\0';
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pfunc = find_symbol_by_name(elf, sym->name);
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coldstr[0] = '.';
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sym->pfunc = pfunc;
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pfunc->cfunc = sym;
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if (!pfunc) {
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WARN("%s(): can't find parent function",
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sym->name);
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goto err;
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}
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sym->pfunc = pfunc;
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pfunc->cfunc = sym;
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/*
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* Unfortunately, -fnoreorder-functions puts the child
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* inside the parent. Remove the overlap so we can
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* have sane assumptions.
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*
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* Note that pfunc->len now no longer matches
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* pfunc->sym.st_size.
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*/
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if (sym->sec == pfunc->sec &&
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sym->offset >= pfunc->offset &&
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sym->offset + sym->len == pfunc->offset + pfunc->len) {
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pfunc->len -= sym->len;
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}
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}
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}
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