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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-14 20:13:37 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-14 20:13:37 +0300 |
commit | 6873139ed078bfe0341d4cbb69e5af1b323bf532 (patch) | |
tree | 234f7acaf1b8db767868dff4ad4b6af73b247ee7 /tools/objtool/objtool.c | |
parent | d5660df4a555a98154da850fb61f118269d0a283 (diff) | |
parent | ab0a40ea88204e1291b56da8128e2845fec8ee88 (diff) | |
download | linux-6873139ed078bfe0341d4cbb69e5af1b323bf532.tar.xz |
Merge tag 'objtool-core-2020-10-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool updates from Ingo Molnar:
"Most of the changes are cleanups and reorganization to make the
objtool code more arch-agnostic. This is in preparation for non-x86
support.
Other changes:
- KASAN fixes
- Handle unreachable trap after call to noreturn functions better
- Ignore unreachable fake jumps
- Misc smaller fixes & cleanups"
* tag 'objtool-core-2020-10-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
perf build: Allow nested externs to enable BUILD_BUG() usage
objtool: Allow nested externs to enable BUILD_BUG()
objtool: Permit __kasan_check_{read,write} under UACCESS
objtool: Ignore unreachable trap after call to noreturn functions
objtool: Handle calling non-function symbols in other sections
objtool: Ignore unreachable fake jumps
objtool: Remove useless tests before save_reg()
objtool: Decode unwind hint register depending on architecture
objtool: Make unwind hint definitions available to other architectures
objtool: Only include valid definitions depending on source file type
objtool: Rename frame.h -> objtool.h
objtool: Refactor jump table code to support other architectures
objtool: Make relocation in alternative handling arch dependent
objtool: Abstract alternative special case handling
objtool: Move macros describing structures to arch-dependent code
objtool: Make sync-check consider the target architecture
objtool: Group headers to check in a single list
objtool: Define 'struct orc_entry' only when needed
objtool: Skip ORC entry creation for non-text sections
objtool: Move ORC logic out of check()
...
Diffstat (limited to 'tools/objtool/objtool.c')
-rw-r--r-- | tools/objtool/objtool.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/tools/objtool/objtool.c b/tools/objtool/objtool.c index 58fdda510653..9df0cd86d310 100644 --- a/tools/objtool/objtool.c +++ b/tools/objtool/objtool.c @@ -22,6 +22,8 @@ #include <linux/kernel.h> #include "builtin.h" +#include "objtool.h" +#include "warn.h" struct cmd_struct { const char *name; @@ -39,6 +41,34 @@ static struct cmd_struct objtool_cmds[] = { bool help; +const char *objname; +static struct objtool_file file; + +struct objtool_file *objtool_open_read(const char *_objname) +{ + if (objname) { + if (strcmp(objname, _objname)) { + WARN("won't handle more than one file at a time"); + return NULL; + } + return &file; + } + objname = _objname; + + file.elf = elf_open_read(objname, O_RDWR); + if (!file.elf) + return NULL; + + INIT_LIST_HEAD(&file.insn_list); + hash_init(file.insn_hash); + INIT_LIST_HEAD(&file.static_call_list); + file.c_file = !vmlinux && find_section_by_name(file.elf, ".comment"); + file.ignore_unreachables = no_unreachable; + file.hints = false; + + return &file; +} + static void cmd_usage(void) { unsigned int i, longest = 0; |