diff options
Diffstat (limited to 'arch/s390/include/asm/bug.h')
| -rw-r--r-- | arch/s390/include/asm/bug.h | 152 |
1 files changed, 105 insertions, 47 deletions
diff --git a/arch/s390/include/asm/bug.h b/arch/s390/include/asm/bug.h index c500d45fb465..59017fd3d935 100644 --- a/arch/s390/include/asm/bug.h +++ b/arch/s390/include/asm/bug.h @@ -3,68 +3,126 @@ #define _ASM_S390_BUG_H #include <linux/compiler.h> +#include <linux/const.h> -#ifdef CONFIG_BUG +#define MONCODE_BUG _AC(0, U) +#define MONCODE_BUG_ARG _AC(1, U) + +#ifndef __ASSEMBLER__ +#if defined(CONFIG_BUG) && defined(CONFIG_CC_HAS_ASM_IMMEDIATE_STRINGS) #ifdef CONFIG_DEBUG_BUGVERBOSE +#define __BUG_ENTRY_VERBOSE(format, file, line) \ + " .long " format " - . # bug_entry::format\n" \ + " .long " file " - . # bug_entry::file\n" \ + " .short " line " # bug_entry::line\n" +#else +#define __BUG_ENTRY_VERBOSE(format, file, line) +#endif -#define __EMIT_BUG(x) do { \ - asm_inline volatile( \ - "0: mc 0,0\n" \ - ".section .rodata.str,\"aMS\",@progbits,1\n" \ - "1: .asciz \""__FILE__"\"\n" \ - ".previous\n" \ - ".section __bug_table,\"aw\"\n" \ - "2: .long 0b-.\n" \ - " .long 1b-.\n" \ - " .short %0,%1\n" \ - " .org 2b+%2\n" \ - ".previous\n" \ - : : "i" (__LINE__), \ - "i" (x), \ - "i" (sizeof(struct bug_entry))); \ -} while (0) +#ifdef CONFIG_DEBUG_BUGVERBOSE_DETAILED +#define WARN_CONDITION_STR(cond_str) cond_str +#else +#define WARN_CONDITION_STR(cond_str) "" +#endif + +#define __BUG_ENTRY(format, file, line, flags, size) \ + " .section __bug_table,\"aw\"\n" \ + "1: .long 0b - . # bug_entry::bug_addr\n" \ + __BUG_ENTRY_VERBOSE(format, file, line) \ + " .short "flags" # bug_entry::flags\n" \ + " .org 1b+"size"\n" \ + " .previous" -#else /* CONFIG_DEBUG_BUGVERBOSE */ - -#define __EMIT_BUG(x) do { \ - asm_inline volatile( \ - "0: mc 0,0\n" \ - ".section __bug_table,\"aw\"\n" \ - "1: .long 0b-.\n" \ - " .short %0\n" \ - " .org 1b+%1\n" \ - ".previous\n" \ - : : "i" (x), \ - "i" (sizeof(struct bug_entry))); \ +#define __BUG_ASM(cond_str, flags) \ +do { \ + asm_inline volatile("\n" \ + "0: mc %[monc](%%r0),0\n" \ + __BUG_ENTRY("%[frmt]", "%[file]", "%[line]", \ + "%[flgs]", "%[size]") \ + : \ + : [monc] "i" (MONCODE_BUG), \ + [frmt] "i" (WARN_CONDITION_STR(cond_str)), \ + [file] "i" (__FILE__), \ + [line] "i" (__LINE__), \ + [flgs] "i" (flags), \ + [size] "i" (sizeof(struct bug_entry))); \ } while (0) -#endif /* CONFIG_DEBUG_BUGVERBOSE */ +#define BUG() \ +do { \ + __BUG_ASM("", 0); \ + unreachable(); \ +} while (0) -#define BUG() do { \ - __EMIT_BUG(0); \ - unreachable(); \ +#define __WARN_FLAGS(cond_str, flags) \ +do { \ + __BUG_ASM(cond_str, BUGFLAG_WARNING | (flags)); \ } while (0) -#define __WARN_FLAGS(flags) do { \ - __EMIT_BUG(BUGFLAG_WARNING|(flags)); \ +#define __WARN_bug_entry(flags, format) \ +({ \ + struct bug_entry *bug; \ + \ + asm_inline volatile("\n" \ + "0: larl %[bug],1f\n" \ + __BUG_ENTRY("%[frmt]", "%[file]", "%[line]", \ + "%[flgs]", "%[size]") \ + : [bug] "=d" (bug) \ + : [frmt] "i" (format), \ + [file] "i" (__FILE__), \ + [line] "i" (__LINE__), \ + [flgs] "i" (flags), \ + [size] "i" (sizeof(struct bug_entry))); \ + bug; \ +}) + +/* + * Variable Argument List (va_list) as defined in ELF Application + * Binary Interface s390x Supplement documentation. + */ +struct arch_va_list { + long __gpr; + long __fpr; + void *__overflow_arg_area; + void *__reg_save_area; +}; + +struct bug_entry; +struct pt_regs; + +void *__warn_args(struct arch_va_list *args, struct pt_regs *regs); +void __WARN_trap(struct bug_entry *bug, ...); + +#define __WARN_print_arg(flags, format, arg...) \ +do { \ + int __flags = (flags) | BUGFLAG_WARNING | BUGFLAG_ARGS; \ + \ + __WARN_trap(__WARN_bug_entry(__flags, format), ## arg); \ + /* prevent tail-call optimization */ \ + asm(""); \ } while (0) -#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); \ +#define __WARN_printf(taint, fmt, arg...) \ + __WARN_print_arg(BUGFLAG_TAINT(taint), fmt, ## arg) + +#define WARN_ONCE(cond, format, arg...) \ +({ \ + int __ret_warn_on = !!(cond); \ + \ + if (unlikely(__ret_warn_on)) { \ + __WARN_print_arg(BUGFLAG_ONCE|BUGFLAG_TAINT(TAINT_WARN),\ + format, ## arg); \ + } \ + __ret_warn_on; \ }) #define HAVE_ARCH_BUG -#define HAVE_ARCH_WARN_ON -#endif /* CONFIG_BUG */ +#define HAVE_ARCH_BUG_FORMAT +#define HAVE_ARCH_BUG_FORMAT_ARGS + +#endif /* CONFIG_BUG && CONFIG_CC_HAS_ASM_IMMEDIATE_STRINGS */ +#endif /* __ASSEMBLER__ */ #include <asm-generic/bug.h> |