Hi,

This is all that I can find that's related to ucontext and mcontext:

#define GREG_S0 3
#define GREG_S1 4
#define GREG_S2 5
#define GREG_S3 6
#define GREG_S4 7
#define GREG_S5 8
#define GREG_S6 9
#define GREG_S7 10
#define GREG_S8 11
#define GREG_SP 12
#define GREG_GP 13
#define GREG_RA 14

typedef int     greg_t;
typedef greg_t  gregset_t[38];

typedef struct  mcontext
{
        gregset_t       gpregs;
} mcontext_t;

typedef struct  ucontext
{
        mcontext_t      uc_mcontext;
} ucontext_t;


me2faster at excite dot com