ArmPkg/Library/ArmSmcLib/Arm/ArmSmc.S [17:44]:
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    // Load the SMC arguments values into the appropriate registers
    ldr     r7, [r0, #28]
    ldr     r6, [r0, #24]
    ldr     r5, [r0, #20]
    ldr     r4, [r0, #16]
    ldr     r3, [r0, #12]
    ldr     r2, [r0, #8]
    ldr     r1, [r0, #4]
    ldr     r0, [r0, #0]

    smc     #0

    // Pop the ARM_SMC_ARGS structure address from the stack into r8
    pop     {r8}

    // Load the SMC returned values into the appropriate registers
    // A SMC call can return up to 4 values - we do not need to store back r4-r7.
    str     r3, [r8, #12]
    str     r2, [r8, #8]
    str     r1, [r8, #4]
    str     r0, [r8, #0]

    mov     r0, r8

    // Restore the registers r4-r8
    pop     {r4-r8}

    bx      lr
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ArmPkg/Library/ArmSmcLib/Arm/ArmSmc.asm [16:43]:
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    // Load the SMC arguments values into the appropriate registers
    ldr     r7, [r0, #28]
    ldr     r6, [r0, #24]
    ldr     r5, [r0, #20]
    ldr     r4, [r0, #16]
    ldr     r3, [r0, #12]
    ldr     r2, [r0, #8]
    ldr     r1, [r0, #4]
    ldr     r0, [r0, #0]

    smc     #0

    // Pop the ARM_SMC_ARGS structure address from the stack into r8
    pop     {r8}

    // Load the SMC returned values into the appropriate registers
    // A SMC call can return up to 4 values - we do not need to store back r4-r7.
    str     r3, [r8, #12]
    str     r2, [r8, #8]
    str     r1, [r8, #4]
    str     r0, [r8, #0]

    mov     r0, r8

    // Restore the registers r4-r8
    pop     {r4-r8}

    bx      lr
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