ucontext.h

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#pragma once

#include <stdint.h>
#include <signal.h>

#define getcontext(ctx) (getmcontext(&(ctx)->uc_mcontext))
#define setcontext(ctx) (setmcontext(&(ctx)->uc_mcontext))

typedef struct mcontext {
    uint32_t pc;
    uint32_t sp;

    uint32_t r4;
    uint32_t r5;
    uint32_t r6;
    uint32_t r7;
    uint32_t r8;
    uint32_t r9;
    uint32_t r10;
    uint32_t r11;
    uint32_t r12;
    uint32_t r13;
    uint32_t r14;
    uint32_t r15;
} mcontext_t;

typedef struct ucontext {
    stack_t uc_stack;
    mcontext_t uc_mcontext;
} ucontext_t;

extern int getmcontext(
    mcontext_t* ctx
);

extern int setmcontext(
    const mcontext_t* ctx
);

extern void makecontext(
    ucontext_t* ctx,
    void (*func)(),
    int argc,
    ...
);

extern int swapcontext(
    ucontext_t* octx,
    const ucontext_t* ctx
);