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#ifndef __X86_BUG_H__
#define __X86_BUG_H__
#define BUG_DISP_WIDTH 24
#define BUG_LINE_LO_WIDTH (31 - BUG_DISP_WIDTH)
#define BUG_LINE_HI_WIDTH (31 - BUG_DISP_WIDTH)
struct bug_frame {
signed int loc_disp:BUG_DISP_WIDTH;
unsigned int line_hi:BUG_LINE_HI_WIDTH;
signed int ptr_disp:BUG_DISP_WIDTH;
unsigned int line_lo:BUG_LINE_LO_WIDTH;
signed int msg_disp[];
};
#define bug_loc(b) ((const void *)(b) + (b)->loc_disp)
#define bug_ptr(b) ((const void *)(b) + (b)->ptr_disp)
#define bug_line(b) (((((b)->line_hi + ((b)->loc_disp < 0)) & \
((1 << BUG_LINE_HI_WIDTH) - 1)) << \
BUG_LINE_LO_WIDTH) + \
(((b)->line_lo + ((b)->ptr_disp < 0)) & \
((1 << BUG_LINE_LO_WIDTH) - 1)))
#define bug_msg(b) ((const char *)(b) + (b)->msg_disp[1])
#define BUGFRAME_run_fn 0
#define BUGFRAME_warn 1
#define BUGFRAME_bug 2
#define BUGFRAME_assert 3
#define BUG_FRAME(type, line, ptr, second_frame, msg) do { \
BUILD_BUG_ON((line) >> (BUG_LINE_LO_WIDTH + BUG_LINE_HI_WIDTH)); \
asm volatile ( ".Lbug%=: ud2\n" \
".pushsection .bug_frames.%c0, \"a\", @progbits\n" \
".p2align 2\n" \
".Lfrm%=:\n" \
".long (.Lbug%= - .Lfrm%=) + %c4\n" \
".long (%c1 - .Lfrm%=) + %c3\n" \
".if " #second_frame "\n" \
".long 0, %c2 - .Lfrm%=\n" \
".endif\n" \
".popsection" \
: \
: "i" (type), "i" (ptr), "i" (msg), \
"i" ((line & ((1 << BUG_LINE_LO_WIDTH) - 1)) \
<< BUG_DISP_WIDTH), \
"i" (((line) >> BUG_LINE_LO_WIDTH) << BUG_DISP_WIDTH)); \
} while (0)
#define WARN() BUG_FRAME(BUGFRAME_warn, __LINE__, __FILE__, 0, NULL)
#define BUG() do { \
BUG_FRAME(BUGFRAME_bug, __LINE__, __FILE__, 0, NULL); \
unreachable(); \
} while (0)
#define run_in_exception_handler(fn) BUG_FRAME(BUGFRAME_run_fn, 0, fn, 0, NULL)
#define assert_failed(msg) do { \
BUG_FRAME(BUGFRAME_assert, __LINE__, __FILE__, 1, msg); \
unreachable(); \
} while (0)
extern const struct bug_frame __start_bug_frames[],
__stop_bug_frames_0[],
__stop_bug_frames_1[],
__stop_bug_frames_2[],
__stop_bug_frames_3[];
#endif /* __X86_BUG_H__ */
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