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parisc: Use natural CPU alignment for bug_table 

Make sure that the __bug_table section gets 32- or 64-bit aligned,
depending if a 32- or 64-bit kernel is being built.
Mark it non-writeable and use .blockz instead of the .org assembler
directive to pad the struct.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org   # v6.0+
This commit is contained in:
Helge Deller 2023-11-20 23:30:49 +01:00
parent c9fcb2b65c
commit fe76a1349f
1 changed files with 18 additions and 12 deletions
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30
arch/parisc/include/asm/bug.h
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@ -28,13 +28,15 @@
do { \
asm volatile("\n" \
"1:\t" PARISC_BUG_BREAK_ASM "\n" \
"\t.pushsection __bug_table,\"aw\"\n" \
"\t.pushsection __bug_table,\"a\"\n" \
"\t.align %4\n" \
"2:\t" ASM_WORD_INSN "1b, %c0\n" \
"\t.short %c1, %c2\n" \
"\t.org 2b+%c3\n" \
"\t.short %1, %2\n" \
"\t.blockz %3-2*%4-2*2\n" \
"\t.popsection" \
: : "i" (__FILE__), "i" (__LINE__), \
"i" (0), "i" (sizeof(struct bug_entry)) ); \
"i" (0), "i" (sizeof(struct bug_entry)), \
"i" (sizeof(long)) ); \
unreachable(); \
} while(0)
@ -51,27 +53,31 @@
do { \
asm volatile("\n" \
"1:\t" PARISC_BUG_BREAK_ASM "\n" \
"\t.pushsection __bug_table,\"aw\"\n" \
"\t.pushsection __bug_table,\"a\"\n" \
"\t.align %4\n" \
"2:\t" ASM_WORD_INSN "1b, %c0\n" \
"\t.short %c1, %c2\n" \
"\t.org 2b+%c3\n" \
"\t.short %1, %2\n" \
"\t.blockz %3-2*%4-2*2\n" \
"\t.popsection" \
: : "i" (__FILE__), "i" (__LINE__), \
"i" (BUGFLAG_WARNING|(flags)), \
"i" (sizeof(struct bug_entry)) ); \
"i" (sizeof(struct bug_entry)), \
"i" (sizeof(long)) ); \
} while(0)
#else
#define __WARN_FLAGS(flags) \
do { \
asm volatile("\n" \
"1:\t" PARISC_BUG_BREAK_ASM "\n" \
"\t.pushsection __bug_table,\"aw\"\n" \
"\t.pushsection __bug_table,\"a\"\n" \
"\t.align %2\n" \
"2:\t" ASM_WORD_INSN "1b\n" \
"\t.short %c0\n" \
"\t.org 2b+%c1\n" \
"\t.short %0\n" \
"\t.blockz %1-%2-2\n" \
"\t.popsection" \
: : "i" (BUGFLAG_WARNING|(flags)), \
"i" (sizeof(struct bug_entry)) ); \
"i" (sizeof(struct bug_entry)), \
"i" (sizeof(long)) ); \
} while(0)
#endif