kbuild: kill false positives from section mismatch warnings for powerpc (9209aed0) · Commits · 戴 / test

Building an allmodconfig kernel for ppc64 revealed a number of false positives - originally reported by Andrew Morton. This patch removes most if not all false positives for ppc64: Section .opd The .opd section contains function descriptors at least for ppc64. So ignore it for .init.text (was ignored for .exit.text). See description of function descriptors here: http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi-1.7.html Section .toc1 ppc64 places some static variables in .toc1 - ignore the. Section __bug_tabe BUG() and friends uses __bug_table. Ignore warnings from that section. Module parameters are placed in .data.rel for ppc64, for adjust pattern to match on section named .data* Tested with gcc: 3.4.0 and binutils 2.15.90.0.3 Signed-off-by:

Sam Ravnborg <sam@ravnborg.org>

scripts/mod/modpost.c

+7 −2

Original line number	Diff line number	Diff line
		@@ -483,7 +483,7 @@ static int strrcmp(const char s, const char sub)
		* this pattern.
		* The pattern is identified by:
		* tosec = .init.data
		* fromsec = .data
		* fromsec = .data*
		* atsym =__param*
		*
		* Pattern 2:
		@@ -512,7 +512,7 @@ static int secref_whitelist(const char tosec, const char fromsec,
		/* Check for pattern 1 */
		if (strcmp(tosec, ".init.data") != 0)
		f1 = 0;
		if (strcmp(fromsec, ".data") != 0)
		if (strncmp(fromsec, ".data", strlen(".data")) != 0)
		f1 = 0;
		if (strncmp(atsym, "__param", strlen("__param")) != 0)
		f1 = 0;
		@@ -743,9 +743,12 @@ static int init_section_ref_ok(const char *name)
		/* Absolute section names */
		const char *namelist1[] = {
		".init",
		".opd", /* see comment [OPD] at exit_section_ref_ok() */
		".toc1", /* used by ppc64 */
		".stab",
		".rodata",
		".text.lock",
		"__bug_table", /* used by powerpc for BUG() */
		".pci_fixup_header",
		".pci_fixup_final",
		".pdr",
		@@ -812,8 +815,10 @@ static int exit_section_ref_ok(const char *name)
		".exit.data",
		".init.text",
		".opd", /* See comment [OPD] */
		".toc1", /* used by ppc64 */
		".altinstructions",
		".pdr",
		"__bug_table", /* used by powerpc for BUG() */
		".exitcall.exit",
		".eh_frame",
		".stab",

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