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