diff options
Diffstat (limited to 'arch/parisc/include/asm/bug.h')
| -rw-r--r-- | arch/parisc/include/asm/bug.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/bug.h b/arch/parisc/include/asm/bug.h new file mode 100644 index 000000000..833555f74 --- /dev/null +++ b/arch/parisc/include/asm/bug.h @@ -0,0 +1,101 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _PARISC_BUG_H +#define _PARISC_BUG_H + +#include <linux/kernel.h> /* for BUGFLAG_TAINT */ + +/* + * Tell the user there is some problem. + * The offending file and line are encoded in the __bug_table section. + */ + +#ifdef CONFIG_BUG +#define HAVE_ARCH_BUG +#define HAVE_ARCH_WARN_ON + +/* the break instruction is used as BUG() marker. */ +#define PARISC_BUG_BREAK_ASM "break 0x1f, 0x1fff" +#define PARISC_BUG_BREAK_INSN 0x03ffe01f /* PARISC_BUG_BREAK_ASM */ + +#ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS +# define __BUG_REL(val) ".word " __stringify(val) " - ." +#else +# define __BUG_REL(val) ".word " __stringify(val) +#endif + + +#ifdef CONFIG_DEBUG_BUGVERBOSE +#define BUG() \ + do { \ + asm volatile("\n" \ + "1:\t" PARISC_BUG_BREAK_ASM "\n" \ + "\t.pushsection __bug_table,\"a\"\n" \ + "\t.align 4\n" \ + "2:\t" __BUG_REL(1b) "\n" \ + "\t" __BUG_REL(%c0) "\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)) ); \ + unreachable(); \ + } while(0) + +#else +#define BUG() \ + do { \ + asm volatile(PARISC_BUG_BREAK_ASM : : ); \ + unreachable(); \ + } while(0) +#endif + +#ifdef CONFIG_DEBUG_BUGVERBOSE +#define __WARN_FLAGS(flags) \ + do { \ + asm volatile("\n" \ + "1:\t" PARISC_BUG_BREAK_ASM "\n" \ + "\t.pushsection __bug_table,\"a\"\n" \ + "\t.align 4\n" \ + "2:\t" __BUG_REL(1b) "\n" \ + "\t" __BUG_REL(%c0) "\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)) ); \ + } while(0) +#else +#define __WARN_FLAGS(flags) \ + do { \ + asm volatile("\n" \ + "1:\t" PARISC_BUG_BREAK_ASM "\n" \ + "\t.pushsection __bug_table,\"a\"\n" \ + "\t.align 4\n" \ + "2:\t" __BUG_REL(1b) "\n" \ + "\t.short %0\n" \ + "\t.blockz %1-4-2\n" \ + "\t.popsection" \ + : : "i" (BUGFLAG_WARNING|(flags)), \ + "i" (sizeof(struct bug_entry)) ); \ + } while(0) +#endif + + +#define WARN_ON(x) ({ \ + int __ret_warn_on = !!(x); \ + if (__builtin_constant_p(__ret_warn_on)) { \ + if (__ret_warn_on) \ + __WARN(); \ + } else { \ + if (unlikely(__ret_warn_on)) \ + __WARN(); \ + } \ + unlikely(__ret_warn_on); \ +}) + +#endif + +#include <asm-generic/bug.h> +#endif + |