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101 lines
2.4 KiB
ArmAsm
101 lines
2.4 KiB
ArmAsm
#define STORE sw
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#define LOAD lw
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#define LOG_REGBYTES 2
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#define REGBYTES (1 << LOG_REGBYTES)
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/*
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Trap entry point (_start_trap)
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Saves registers and calls _start_trap_rust_hal,
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restores registers and then returns.
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*/
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.section .trap, "ax"
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.global _start_trap_hal
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.option norelax
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.align 6
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_start_trap_hal:
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addi sp, sp, -32*REGBYTES
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STORE ra, 0*REGBYTES(sp)
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STORE t0, 1*REGBYTES(sp)
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STORE t1, 2*REGBYTES(sp)
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STORE t2, 3*REGBYTES(sp)
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STORE t3, 4*REGBYTES(sp)
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STORE t4, 5*REGBYTES(sp)
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STORE t5, 6*REGBYTES(sp)
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STORE t6, 7*REGBYTES(sp)
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STORE a0, 8*REGBYTES(sp)
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STORE a1, 9*REGBYTES(sp)
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STORE a2, 10*REGBYTES(sp)
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STORE a3, 11*REGBYTES(sp)
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STORE a4, 12*REGBYTES(sp)
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STORE a5, 13*REGBYTES(sp)
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STORE a6, 14*REGBYTES(sp)
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STORE a7, 15*REGBYTES(sp)
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STORE s0, 16*REGBYTES(sp)
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STORE s1, 17*REGBYTES(sp)
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STORE s2, 18*REGBYTES(sp)
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STORE s3, 19*REGBYTES(sp)
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STORE s4, 20*REGBYTES(sp)
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STORE s5, 21*REGBYTES(sp)
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STORE s6, 22*REGBYTES(sp)
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STORE s7, 23*REGBYTES(sp)
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STORE s8, 24*REGBYTES(sp)
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STORE s9, 25*REGBYTES(sp)
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STORE s10, 26*REGBYTES(sp)
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STORE s11, 27*REGBYTES(sp)
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STORE gp, 28*REGBYTES(sp)
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STORE tp, 29*REGBYTES(sp)
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addi s0, sp, 32*REGBYTES
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STORE s0, 30*REGBYTES(sp)
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add a0, sp, zero
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jal ra, _start_trap_rust_hal
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LOAD ra, 0*REGBYTES(sp)
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LOAD t0, 1*REGBYTES(sp)
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LOAD t1, 2*REGBYTES(sp)
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LOAD t2, 3*REGBYTES(sp)
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LOAD t3, 4*REGBYTES(sp)
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LOAD t4, 5*REGBYTES(sp)
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LOAD t5, 6*REGBYTES(sp)
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LOAD t6, 7*REGBYTES(sp)
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LOAD a0, 8*REGBYTES(sp)
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LOAD a1, 9*REGBYTES(sp)
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LOAD a2, 10*REGBYTES(sp)
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LOAD a3, 11*REGBYTES(sp)
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LOAD a4, 12*REGBYTES(sp)
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LOAD a5, 13*REGBYTES(sp)
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LOAD a6, 14*REGBYTES(sp)
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LOAD a7, 15*REGBYTES(sp)
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LOAD s0, 16*REGBYTES(sp)
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LOAD s1, 17*REGBYTES(sp)
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LOAD s2, 18*REGBYTES(sp)
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LOAD s3, 19*REGBYTES(sp)
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LOAD s4, 20*REGBYTES(sp)
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LOAD s5, 21*REGBYTES(sp)
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LOAD s6, 22*REGBYTES(sp)
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LOAD s7, 23*REGBYTES(sp)
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LOAD s8, 24*REGBYTES(sp)
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LOAD s9, 25*REGBYTES(sp)
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LOAD s10, 26*REGBYTES(sp)
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LOAD s11, 27*REGBYTES(sp)
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LOAD gp, 28*REGBYTES(sp)
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LOAD tp, 29*REGBYTES(sp)
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LOAD sp, 30*REGBYTES(sp)
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# SP was restored from the original SP
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mret
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.section .trap, "ax"
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.balign 0x100
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.global _vector_table
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.type _vector_table, @function
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_vector_table:
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.option push
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.option norvc
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.rept 31
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j _start_trap_hal
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.endr |