emu_task.c

[詳解]

/** @file
    @brief      エミュレータ疑似タスク制御

    @date       2012.12.08
    @author     Takashi SHUDO
*/

#include "asm-emu.h"
#include "task/task.h"
#include "tprintf.h"

#include <stdio.h>

//#define DEBUG
#ifdef DEBUG
#define PCPRINTF        printf
#else
#define PCPRINTF(x, ...)
#endif

static ucontext_t uctx;

void setup_task(void *sp, int stack_size, void (* task)(void),
                struct st_tcb *tcb)
{
        PCPRINTF("setup_task sp=%p, stack_size=%d, task=%p,"
                 " tcb=%p\r\n", sp, stack_size,
                 task, tcb);
        
        if(getcontext(&(tcb->ctx.uc)) == -1) {
                fprintf(stderr, "getcontext error");
        }
        tcb->ctx.uc.uc_stack.ss_sp = sp;
        tcb->ctx.uc.uc_stack.ss_size = stack_size;
        tcb->ctx.uc.uc_link = &uctx;
        makecontext(&(tcb->ctx.uc), (void *)task, 0);
}

void disp_regs(void *sp)
{
        // EMUはレジスタは表示できない
}