jmp.h

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#ifndef JMP_H
#define JMP_H

/*
   q_jmp_buf:
    offset  size    description
    0    2  frame pointer (r29:r28)
    2    2  stack pointer (SPH:SPL)
    4    1  status register (SREG)
    5    2/3    return address (PC) (2 bytes used for <=128Kw flash)
    7        = total size (AVR Tiny10 family always has 2 bytes PC)
 */

#if defined(__AVR_3_BYTE_PC__) && __AVR_3_BYTE_PC__
# define _QJB_LEN  8
#else
# define _QJB_LEN  7
#endif
typedef struct _q_jmp_buf { unsigned char _buf[_QJB_LEN]; } q_jmp_buf[1];

/* Note that this version of setjmp/longjmp does not bother with
 * passing a value. This is intentional.
 */
extern void setjmp_q(q_jmp_buf _buf);
extern void longjmp_q(q_jmp_buf _buf) __attribute__((__noreturn__));

#endif  /* JMP_H */