diff options
Diffstat (limited to 'tools/objtool')
| -rw-r--r-- | tools/objtool/check.c | 1 | ||||
| -rw-r--r-- | tools/objtool/elf.c | 41 |
2 files changed, 29 insertions, 13 deletions
diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 38047c6aa575..f4a25bd1871f 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -164,6 +164,7 @@ static int __dead_end_function(struct objtool_file *file, struct symbol *func, "lbug_with_loc", "fortify_panic", "usercopy_abort", + "machine_real_restart", }; if (func->bind == STB_WEAK) diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c index 4e60e105583e..0d1acb704f64 100644 --- a/tools/objtool/elf.c +++ b/tools/objtool/elf.c @@ -302,19 +302,34 @@ static int read_symbols(struct elf *elf) continue; sym->pfunc = sym->cfunc = sym; coldstr = strstr(sym->name, ".cold."); - if (coldstr) { - coldstr[0] = '\0'; - pfunc = find_symbol_by_name(elf, sym->name); - coldstr[0] = '.'; - - if (!pfunc) { - WARN("%s(): can't find parent function", - sym->name); - goto err; - } - - sym->pfunc = pfunc; - pfunc->cfunc = sym; + if (!coldstr) + continue; + + coldstr[0] = '\0'; + pfunc = find_symbol_by_name(elf, sym->name); + coldstr[0] = '.'; + + if (!pfunc) { + WARN("%s(): can't find parent function", + sym->name); + goto err; + } + + sym->pfunc = pfunc; + pfunc->cfunc = sym; + + /* + * Unfortunately, -fnoreorder-functions puts the child + * inside the parent. Remove the overlap so we can + * have sane assumptions. + * + * Note that pfunc->len now no longer matches + * pfunc->sym.st_size. + */ + if (sym->sec == pfunc->sec && + sym->offset >= pfunc->offset && + sym->offset + sym->len == pfunc->offset + pfunc->len) { + pfunc->len -= sym->len; } } } |
