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Rev 3022 Rev 4055
Line 68... Line 68...
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    volatile ustate_t ustate;
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    volatile ustate_t ustate;
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    /* set first parameter */
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    /* set first parameter */
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    ustate.r0 = (uintptr_t) kernel_uarg->uspace_uarg;
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    ustate.r0 = (uintptr_t) kernel_uarg->uspace_uarg;
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- 
 
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    /* %r1 is defined to hold pcb_ptr - set it to 0 */
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    ustate.r1 = 0;
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    /* clear other registers */
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    /* clear other registers */
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    ustate.r1 = ustate.r2  = ustate.r3  = ustate.r4  = ustate.r5 =
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    ustate.r2 = ustate.r3  = ustate.r4  = ustate.r5 =
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        ustate.r6  = ustate.r7  = ustate.r8  = ustate.r9 = ustate.r10 =
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        ustate.r6  = ustate.r7  = ustate.r8  = ustate.r9 = ustate.r10 =
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        ustate.r11 = ustate.r12 = ustate.lr = 0;
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        ustate.r11 = ustate.r12 = ustate.lr = 0;
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    /* set user stack */
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    /* set user stack */
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    ustate.sp = ((uint32_t)kernel_uarg->uspace_stack) + PAGE_SIZE;
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    ustate.sp = ((uint32_t)kernel_uarg->uspace_stack) + PAGE_SIZE;
Line 85... Line 88...
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    ipl_t user_mode = current_status_reg_read() &
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    ipl_t user_mode = current_status_reg_read() &
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        (~STATUS_REG_MODE_MASK | USER_MODE);
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        (~STATUS_REG_MODE_MASK | USER_MODE);
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    /* set user mode, set registers, jump */
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    /* set user mode, set registers, jump */
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    asm volatile (
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    asm volatile (
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        "mov sp, %0         \n"
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        "mov sp, %[ustate]\n"
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        "msr spsr_c, %1         \n"
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        "msr spsr_c, %[user_mode]\n"
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        "ldmfd sp!, {r0-r12, sp, lr}^   \n"
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        "ldmfd sp!, {r0-r12, sp, lr}^\n"
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        "ldmfd sp!, {pc}^\n"
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        "ldmfd sp!, {pc}^\n"
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        :
 - 
 
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        : "r" (&ustate), "r" (user_mode)
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        :: [ustate] "r" (&ustate), [user_mode] "r" (user_mode)
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    );
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    );
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    /* unreachable */
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    /* unreachable */
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    while(1)
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    while(1)
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        ;
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        ;