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replace multiple instructions with macro SAVE_CONTEXT and RESTORE_CONTEXT

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acezhao
2019-09-14 22:15:09 +08:00
parent ad72fb73d2
commit de43d4ef0e
10 changed files with 342 additions and 502 deletions
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52
arch/risc-v/rv32i/start.S
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@@ -3,39 +3,39 @@
#include "riscv_encoding.h"
.section .text.entry
.globl _start
.type _start,@function
.globl _start
.type _start,@function
_start:
csrc mstatus, MSTATUS_MIE
csrw mie, 0
csrc mstatus, MSTATUS_MIE
csrw mie, 0
la t0, machine_trap_entry
csrw mtvec, t0
la t0, machine_trap_entry
csrw mtvec, t0
la sp, _stack_top
la sp, _stack_top
/* Load data section */
la a0, _load_data
la a1, _data
la a2, _edata
bgeu a1, a2, begin_clear_bss
/* Load data section */
la a0, _load_data
la a1, _data
la a2, _edata
bgeu a1, a2, begin_clear_bss
clear_data:
lw t0, (a0)
sw t0, (a1)
addi a0, a0, 4
addi a1, a1, 4
bltu a1, a2, clear_data
lw t0, (a0)
sw t0, (a1)
addi a0, a0, 4
addi a1, a1, 4
bltu a1, a2, clear_data
begin_clear_bss:
// clear bss section
la a0, _bss
la a1, _ebss
bgeu a0, a1, init_finish
// clear bss section
la a0, _bss
la a1, _ebss
bgeu a0, a1, init_finish
clear_bss:
sw zero, (a0)
addi a0, a0, 4
bltu a0, a1, clear_bss
sw zero, (a0)
addi a0, a0, 4
bltu a0, a1, clear_bss
init_finish:
call main
call main
__die:
j __die
j __die