inst.s

diff --git a/Makefile b/Makefile
index 2f699c69e037c3198c2088b02027b6ca7da4c5c9..81fc642627a0277d2fce48ef41149e4f2b0833a5 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,9 @@
 all:
        as _start.s -o _start.o
        as asm.s -o asm.o
-       ld _start.o asm.o -lc -o a.out
+       as str.s -o str.o
+       as inst.s -o inst.o
+       ld _start.o asm.o str.o inst.o -lc -o a.out
 #      gcc -fPIE main.c str.s asm.s
 clean:
        rm *.o

diff --git a/asm.s b/asm.s
index ecebc7184f505fb12c0fbe8326a10a4511274186..527b90c0e8ffb7e3f518c64c1c5fbb358132870e 100644 (file)
--- a/asm.s
+++ b/asm.s
@@ -1,11 +1,13 @@
 .text
 .global printf, putchar
-.global asm_main
+.global asm_main, asm_make_inst
 
 asm_main:
 #rdi = argc
 #rsi = argv
 #rdx = envp
+       push %rbp
+
        cmp $2, %rdi
        jl  _print_usage
 
@@ -25,35 +27,45 @@ asm_main:
        je   4f
 
        test %al, %al
-       je   5f
+       je   4f
 
        inc %rdi
        jmp 1b
 
 2:#before ' ' is opcode
+       movb $0, (%rdi)
+       leaq opcode, %r8
+       movq %rsi, (%r8)
+       jmp 5f
+
 3:#before ',' is operand 1
-4:#before '\n' is operand 2
        movb $0, (%rdi)
-5:
-       push %rax
+       leaq src, %r8
+       movq %rsi, (%r8)
+       jmp 5f
+
+4:#before '\n' or '\0' is operand 2
+       movb $0, (%rdi)
+
        push %rax
        push %rdi
-       mov  %rsi, %rdi
-       mov  $0, %eax
-       call printf
 
-       mov  $10, %rdi
-       call putchar
+       movq %rsi, %rdx
+       movq src,  %rsi
+       movq opcode, %rdi
+
+       call asm_make_inst
+
        pop  %rdi
        pop  %rax
-       pop  %rax
-
+5:
        test %al,%al
        je 6f
 
        inc %rdi
        jmp 0b
 6:
+       pop %rbp
        ret
 _print_usage:
        push %rdi
@@ -63,4 +75,6 @@ _print_usage:
        pop  %rdi
        ret
 .data
+opcode: .quad 0
+src: .quad 0
 usage: .asciz "./a.out asm_code\n"

diff --git a/inst.s b/inst.s
new file mode 100644 (file)
index 0000000..82417d2
--- /dev/null
+++ b/inst.s
@@ -0,0 +1,214 @@
+.text
+.global printf, putchar
+.global asm_strncmp, asm_strcmp
+.global asm_make_inst
+
+N_registers = 4
+N_opcodes = 4
+
+asm_make_inst:
+#rdi = opcode
+#rsi = src
+#rdx = dst
+       push %rbp
+
+       movq %rdi, v_op
+       movq %rsi, v_src
+       movq %rdx, v_dst
+
+       movq v_dst, %rdi
+       leaq __registers, %rsi
+       movl $N_registers, %edx
+       call asm_find_reg
+       movq %rax, v_dst
+
+       movq v_src, %rdi
+       leaq __registers, %rsi
+       movl $N_registers, %edx
+       call asm_find_reg
+       movq %rax, v_src
+
+       movq v_op, %rdi
+       movq v_src, %rax
+       movb 9(%rax), %sil
+       movq v_dst, %rax
+       movb 9(%rax), %dl
+       leaq __opcodes, %rcx
+       movl $N_opcodes, %r8d
+       call asm_find_opcode
+       movq %rax, v_op
+
+       leaq fmt, %rdi
+       movb 10(%rax), %al
+       movzbq %al, %rsi
+       xorq  %rax, %rax
+       call  printf
+
+       leaq fmt, %rdi
+       movq v_src, %rax
+       movb 8(%rax), %al
+       movzbq %al, %rsi
+       xorq  %rax, %rax
+       call  printf
+
+       leaq fmt, %rdi
+       movq v_dst, %rax
+       movb 8(%rax), %al
+       movzbq %al, %rsi
+       xorq  %rax, %rax
+       call  printf
+
+       pop  %rbp
+       ret
+
+asm_find_reg:
+#rdi, name of opcode
+#rsi, array pointer to search
+#edx, array len
+
+       push %rbx
+       push %r12
+       push %r13
+
+       movq %rsi, %rbx
+       movl %edx, %r12d
+       movq %rdi, %r13
+
+0:
+       movq %r13, %rdi
+       movq (%rbx), %rsi
+       call asm_strcmp
+
+       test %eax, %eax
+       jne  1f
+
+       movq %rbx, %rax
+       jmp  3f
+1:
+       decl %r12d
+       test %r12d, %r12d
+       je   2f
+
+       addq $16, %rbx
+       jmp  0b
+2:
+       xorq %rax, %rax
+3:
+       pop  %r13
+       pop  %r12
+       pop  %rbx
+       ret
+
+asm_find_opcode:
+#rdi, name of opcode
+#esi, src len of opcode
+#edx, dst len of opcode
+#rcx, array pointer to search
+#r8,  array len
+
+       push %rbx
+       push %r12
+       push %r13
+       push %r14
+       push %r15
+
+       movq %rcx, %rbx
+       movl %r8d, %r12d
+
+       movq %rdi, %r13
+       movl %esi, %r14d
+       movl %edx, %r15d
+
+0:
+       movq %r13, %rdi
+       movq (%rbx), %rsi
+       call asm_strcmp
+
+       test %eax, %eax
+       jne  1f
+
+       cmpb 8(%rbx), %r14b
+       jne  1f
+       cmpb 9(%rbx), %r15b
+       jne  1f
+
+       movq %rbx, %rax
+       jmp  2f
+1:
+       decl %r12d
+       test %r12d, %r12d
+       je   2f
+
+       addq $16, %rbx
+       jmp  0b
+2:
+       pop  %r15
+       pop  %r14
+       pop  %r13
+       pop  %r12
+       pop  %rbx
+       ret
+
+.align 4
+.data
+v_op:  .quad 0
+v_src: .quad 0
+v_dst: .quad 0
+
+fmt: .asciz "%#x\n"
+
+.align 4
+__mov: .asciz "mov"
+
+__al: .asciz "al"
+__eax: .asciz "eax"
+
+__bl: .asciz "bl"
+__ebx: .asciz "ebx"
+
+.align 4
+__opcodes:
+       .quad __mov
+       .byte 1     # src len
+       .byte 1     # dst len
+       .byte 0x88  # opcode
+       .fill 5, 1, 0
+
+       .quad __mov
+       .byte 2     # src len
+       .byte 2     # dst len
+       .byte 0x89
+       .fill 5, 1, 0
+
+       .quad __mov
+       .byte 4     # src len
+       .byte 4     # dst len
+       .byte 0x89
+       .fill 5, 1, 0
+
+       .quad __mov
+       .byte 8     # src len
+       .byte 8     # dst len
+       .byte 0x89
+       .fill 5, 1, 0
+
+__registers:
+       .quad __al
+       .byte 0   #id
+       .byte 1   #uint8_t
+       .fill 6, 1, 0
+
+       .quad __eax
+       .byte 0   #id
+       .byte 4   #uint32_t
+       .fill 6, 1, 0
+
+       .quad __bl
+       .byte 3   #id
+       .byte 1   #uint8_t
+       .fill 6, 1, 0
+
+       .quad __ebx
+       .byte 3   #id
+       .byte 4   #uint32_t
+       .fill 6, 1, 0