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FROMLIST: modpost: lto: strip .lto from module names

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With LTO, everything is compiled into LLVM bitcode, so we have to link
each module into native code before modpost. Kbuild uses the .lto.o
suffix for these files, which also ends up in module information. This
change strips the unnecessary .lto suffix from the module name.

Bug: 145210207
Change-Id: I25b97a586f273b1b8d1f153b71e567136b0016ec
Link: https://lore.kernel.org/lkml/20201211184633.3213045-11-samitolvanen@google.com/
Suggested-by: Bill Wendling <morbo@google.com>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Sami Tolvanen
2020-03-06 13:52:03 -08:00
parent 7ffcc1cf4c
commit 1f975cd7dd
3 changed files with 21 additions and 10 deletions
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6
scripts/mod/sumversion.c
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@@ -391,10 +391,14 @@ void get_src_version(const char *modname, char sum[], unsigned sumlen)
struct md4_ctx md;
char *fname;
char filelist[PATH_MAX + 1];
int postfix_len = 1;
if (strends(modname, ".lto.o"))
postfix_len = 5;
/* objects for a module are listed in the first line of *.mod file. */
snprintf(filelist, sizeof(filelist), "%.*smod",
(int)strlen(modname) - 1, modname);
(int)strlen(modname) - postfix_len, modname);
buf = read_text_file(filelist);