1656 lines
26 KiB
Plaintext
1656 lines
26 KiB
Plaintext
# 1 "command.k"
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# 1 "<built-in>"
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# 1 "<command-line>"
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# 31 "<command-line>"
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# 1 "/usr/include/stdc-predef.h" 1 3 4
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# 32 "<command-line>" 2
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# 1 "command.k"
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; The OS/K Team licenses this file to you under the MIT license.
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; See the LICENSE file in the project root for more information.
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cmdstart:
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jmp start
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# 1 "crt/crt.k" 1
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; The OS/K Team licenses this file to you under the MIT license.
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; See the LICENSE file in the project root for more information.
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;
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; Limits
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;
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# 31 "crt/crt.k"
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;
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; Magic numbers
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;
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;
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; CRT librairies
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;
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# 1 "./crt/sys.k" 1
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; The OS/K Team licenses this file to you under the MIT license.
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; See the LICENSE file in the project root for more information.
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;
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; SHUTDOWN syscall
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;
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; End virtual machine
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;
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Sys.Shutdown := 0x00
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;
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; EXIT syscall
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;
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; Return to COMMAND.COM
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;
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Sys.Exit := 0x01
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;
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; EXEC syscall
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;
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; IN
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; ax0 = new RIP to load
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; ax1 = frame ID to switch to
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;
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; New frame ID must be higher than current
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; frame ID, and cannot be below 5
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;
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; New CR1 is set so that new RIP corresponds to 1MB
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;
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Sys.ExecuteInFrame := 0x02
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; FIND syscalls
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;
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; Find file on disk
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;
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; IN
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; ax0 = address of name buffer
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; ax1 = size of name buffer
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;
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; OUT
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; rax = # of bytes written in name buffer
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; rdx = size of file
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;
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;
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Sys.FindFirst := 0x20
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Sys.FindNext := 0x21
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;
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; OPEN syscall
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;
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; IN
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; ax0 = name string
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;
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; OUT
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; rax = handle of file, or <0 if couldn't open
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;
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Sys.OpenFile := 0x30
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;
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; CREATE syscall
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;
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; IN
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; ax0 = name string
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;
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; OUT
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; rax = 0 on success, or <0 if couldn't open
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;
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Sys.CreateFile := 0x31
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;
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; REMOVE syscall
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;
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; IN
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; ax0 = name string
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;
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; OUT
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; rax = 0 on success, or <0 if couldn't open
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;
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Sys.RemoveFile := 0x32
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;
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; CLOSE syscall
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;
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; IN
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; ax0 = file handle
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;
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Sys.CloseFile := 0x35
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;
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; READ syscall
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;
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; IN
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; ax0 = file handle
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; ax1 = buffer address
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; ax2 = buffer size
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;
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; OUT
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; rax = number of bytes read, <0 on error
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;
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Sys.ReadFile := 0x38
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; Halt mode
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Sys.EnterHaltMode := 0x999
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# 43 "crt/crt.k" 2
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# 1 "./crt/str.k" 1
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; The OS/K Team licenses this file to you under the MIT license.
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; See the LICENSE file in the project root for more information.
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;
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; int strnlen(char *, int)
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;
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strnlen:
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mov rcx, ax1
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scasb ax0, zero
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sub rax, ax1, rcx
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ret
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;
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; int strlen(char *)
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;
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strlen:
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mov rcx, 0x7AFFFFFF
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mov rdx, rcx
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scasb ax0, zero
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sub rax, rdx, rcx
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ret
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;
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; void strcpy(char *, const char *)
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;
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strcpy:
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.l:
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mov rcx, b[ax1]
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mov b[ax0], rcx
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jrcxz .r
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inc ax0
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inc ax1
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jmp .l
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.r:
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ret
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;
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; void strncpy(char *, const char *, int)
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;
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strncpy:
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mov rcx, ax2
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jrcxz .r
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.l:
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mov b[ax0], b[ax1]
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inc ax0
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inc ax1
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loop .l
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.r:
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ret
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;
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; void strnzcpy(char *, const char *, int)
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;
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strnzcpy:
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mov rcx, ax2
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jrcxz .r
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.l:
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mov rax, b[ax1]
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mov b[ax0], rax
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jraxz .r
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inc ax0
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inc ax1
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loop .l
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.z:
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nul b[ax0]
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.r:
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ret
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;
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; int strcmp(const char *str1, const char *str2)
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;
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; Returns:
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; 0 if the contents of both strings are equal
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; >0 if the first character that does not match has a greater value in str1 than in str2
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; <0 if the first character that does not match has a lower value in str1 than in str2
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;
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strcmp:
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nul rsi
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.l:
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movzx rax, b[ax0+rsi]
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movzx rdx, b[ax1+rsi]
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bne rax, rdx, .r
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; both zero?
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add rcx, rax, rdx
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jrcxz .r
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inc rsi
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jmp .l
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.r:
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sub rax, rdx
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ret
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;
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; int strncmp(const char *str1, const char *str2, int maxn)
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;
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strncmp:
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mov rcx, ax2
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jrcxz .r
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.l:
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movzx rax, b[ax0]
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movzx rdx, b[ax1]
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bne rax, rdx, .r
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inc ax0
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inc ax1
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loop .l
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.r:
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sub rax, rdx
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ret
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;
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; char *strchrnul(const char *str, int ch)
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;
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strchrnul:
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mov rcx, 0x7AFFFFFF
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scasb ax0, ax1
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mov rax, ax0
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ret
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;
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; char *strchr(const char *str, int ch)
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;
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strchr:
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mov rcx, 0x7AFFFFFF
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scasb ax0, ax1
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bnz b[ax0], .r
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nul rax
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ret
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.r:
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mov rax, ax0
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ret
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;
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; void strrev(char *buf, const char *str)
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;
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; buf and src must NOT overlap
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;
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strrev:
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bzr b[ax1], .z
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; save str's location
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mov rsi, ax1
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; go to str's end, just before
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; the null terminator
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mov rcx, 0x7AFFFFFF
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scasb ax1, zero
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dec ax1
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.l:
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; copy, going backward though str
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; and forward through buf
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mov b[ax0], b[ax1]
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beq ax1, rsi, .r
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inc ax0
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dec ax1
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jmp .l
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.r:
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nul b[ax0+1]
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ret
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.z:
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nul b[ax0]
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ret
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;
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; void strrev2(char *str)
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;
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; Inverses str
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;
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strrev2:
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bzr b[ax0], .r
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mov ax1, ax0
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; go to str's end, just before
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; the null terminator
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mov rcx, 0x7AFFFFFF
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scasb ax1, zero
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dec ax1
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; increase ax0 while decreasing ax1, performing exchanges
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.l:
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blteu ax1, ax0, .r
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xchg b[ax0], b[ax1]
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inc ax0
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dec ax1
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jmp .l
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.r:
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ret
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# 44 "crt/crt.k" 2
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# 1 "./crt/mem.k" 1
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; The OS/K Team licenses this file to you under the MIT license.
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; See the LICENSE file in the project root for more information.
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;
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; void memcpy(void *, const void *, int)
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;
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memcpy:
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mov rcx, ax2
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jrcxz .r
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.l:
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sub rdx, ax2, rcx
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mov b[ax0+rdx], b[ax1+rdx]
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loop .l
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.r:
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ret
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;
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; void memzero(void *, int)
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;
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memzero:
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mov rcx, ax1
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jrcxz .r
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.l:
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nul b[ax0]
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inc ax0
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loop .l
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.r:
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ret
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# 45 "crt/crt.k" 2
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# 1 "./crt/time.k" 1
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; The OS/K Team licenses this file to you under the MIT license.
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; See the LICENSE file in the project root for more information.
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;
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; struct TIME
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; {
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; byte sec; +0 (0-59)
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; byte min; +1 (0-59)
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; byte hour; +2 (0-23)
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; byte mday; +3 (0-31)
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; byte month; +4 (0-11)
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; byte; +5 (pad)
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; word year; +6 (0-65536)
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; word yday; +8 (0-365)
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; word; +10 (pad)
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; dword; +12 (pad)
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; } 16 bytes
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;
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;
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; int DaysInYear(int year)
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;
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DaysInYear:
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mov rax, 365
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; divisible by 4?
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rem rcx, ax0, 4
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jrcxnz .end
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; divisible by 100?
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rem rcx, ax0, 100
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jrcxnz .leap
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; divisible by 400?
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rem rcx, ax0, 400
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jrcxnz .end
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.leap:
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inc rax, 1
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.end:
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ret
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;
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; TIME *GetTimeUTC(void)
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;
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GetTimeUTC:
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ytime
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mov rdi, .buf
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; seconds
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rem rsi, rax, 60
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mov b[rdi], rsi
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; minutes
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div rsi, rax, 60
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rem rsi, 60
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mov b[rdi+1], rsi
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; hours
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div rsi, rax, 3600
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rem rsi, 24
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mov b[rdi+2], rsi
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; month days
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div rsi, rax, 3600*24
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mov b[rdi+3], rsi
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; month
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mov b[rdi+4], rbx
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; years
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mov w[rdi+6], rcx
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;
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; ydays (TODO)
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;
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mov rax, .buf
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ret
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.buf = [24]
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# 46 "crt/crt.k" 2
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# 1 "./crt/fmt/ltostr.k" 1
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; The OS/K Team licenses this file to you under the MIT license.
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; See the LICENSE file in the project root for more information.
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;
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; void itoa(char *buf, int num, int base)
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;
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itoa:
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mov ax3, 1
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jmp ltostr
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;
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; void utoa(char *buf, int num, int base)
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;
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utoa:
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nul ax3
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jmp ltostr
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;
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; void ltostr(char *buf, int num, int base, bool signed)
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;
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ltostr:
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mov rax, ax0
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nul rcx
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; make sure base is in [2, 32]
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bltu ax2, 2, .bad
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bltu 36, ax2, .bad
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; deal with zero
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bzr ax1, .is_zero
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; deal with base 10 signedness
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bzr ax3, .conv
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bne ax2, 10, .conv ; base 10
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shr rcx, ax1, 63 ; extract ax1 sign
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jrcxz .conv
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neg ax1 ; NEG if negative
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; main loop
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.conv:
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bzr ax1, .fini
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rem rdx, ax1, ax2 ; ax1 % base
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blt 9, rdx, .nondec ; rdx > 9 ?
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inc rdx, '0'
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jmp .next
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.nondec:
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inc rdx, 55 ; 'A' - 10
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.next:
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mov b[ax0], rdx
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inc ax0
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div ax1, ax2
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jmp .conv
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; add minus flag, null-terminate and reverse
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.fini:
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jrcxz .cxz
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mov b[ax0], '-'
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inc ax0
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.cxz:
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nul b[ax0]
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call strrev2, rax
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ret
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;
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; exceptional cases
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;
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.bad:
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mov b[ax0], 0
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ret
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.is_zero:
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mov b[ax0], 48 ; '0'
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mov b[ax0+1], 0
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ret
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# 48 "crt/crt.k" 2
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# 1 "./crt/fmt/strtol.k" 1
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; The OS/K Team licenses this file to you under the MIT license.
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; See the LICENSE file in the project root for more information.
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;
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; int strtol(const char *str, int base)
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;
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; rax = integer extracted from str
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; rdx = pointer to first invalid byte
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;
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strtol:
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mov ax2, 1
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jmp strtoq
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;
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; int strtoul(const char *str, int base)
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;
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; rax = integer extracted from str
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; rdx = pointer to first invalid byte
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;
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strtoul:
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nul ax2
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jmp strtoq
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;
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; int strtoq(const char *str, int base, bool signed)
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;
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; guesses base when 'base'=0
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;
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strtoq:
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nul rax, rsi
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mov rdx, ax0
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; make sure base is in [2, 32]
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beq ax1, 1, .bad
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bltu 36, ax1, .bad
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; empty string?
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bzr b[rdx], .done
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.skip_spc:
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bne b[rdx], ' ', .no_spc
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inc rdx
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jmp .skip_spc
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.no_spc:
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; skip +
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bne b[rdx], '+', .no_plus
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inc rdx
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.no_plus:
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; unsigned?
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bzr ax2, .unsigned
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; parse '-'
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bne b[rdx], '-', .unsigned
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inc rdx
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mov rsi, 1
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.unsigned:
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; base 0
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bzr ax1, .base_0
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; base prefix?
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bne b[rdx], '0', .main_loop
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inc rdx
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movzx rcx, b[rdx]
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; "0x"/"0b" prefix
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jrcxz .done ; "0"
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beq rcx, 'x', .parsed_0x
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beq rcx, 'b', .parsed_0b
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; may be octal, but we don't care
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; we accept "0110101010" (despite base=2) for instance
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jmp .main_loop
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.parsed_0x:
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; are we in base 16?
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; if not, leave rax = 0 and *rdx = 'x'
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bne ax1, 16, .done
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; else
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inc rdx, 1
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jmp .main_loop
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.parsed_0b:
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; are we in base 2?
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; if not, leave rax = 0 and *rdx = 'b'
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bne ax1, 2, .done
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; else
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inc rdx
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jmp .main_loop
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|
|
.base_0:
|
|
; guess base
|
|
|
|
beq b[rdx], '0', .b0_not10
|
|
|
|
; must be base 10
|
|
mov ax1, 10
|
|
jmp .main_loop
|
|
|
|
.b0_not10:
|
|
inc rdx
|
|
|
|
bne b[rdx], 'x', .b0_not16
|
|
inc rdx
|
|
mov ax1, 16
|
|
jmp .main_loop
|
|
|
|
.b0_not16:
|
|
bne b[rdx], 'b', .b0_not2
|
|
inc rdx
|
|
mov ax1, 2
|
|
jmp .main_loop
|
|
|
|
.b0_not2:
|
|
; take octal by default
|
|
mov ax1, 8
|
|
|
|
.main_loop:
|
|
movzx rcx, b[rdx]
|
|
inc rdx
|
|
|
|
; between 0 and 9?
|
|
bltu rcx, '0', .done
|
|
bltu '9', rcx, .not_digit10
|
|
|
|
; yes
|
|
sub rcx, '0'
|
|
jmp .next
|
|
|
|
.not_digit10:
|
|
bltu rcx, 'A', .done
|
|
bltu 'Z', rcx, .not_digitAZ
|
|
|
|
sub rcx, 55 ; 'A' - 10
|
|
jmp .next
|
|
|
|
.not_digitAZ:
|
|
bltu rcx, 'a', .done
|
|
bltu 'z', rcx, .done
|
|
|
|
sub rcx, 87 ; 'a' - 10
|
|
jmp .next
|
|
|
|
.next:
|
|
; too large for base?
|
|
blteu ax1, rcx, .done
|
|
|
|
mul rax, ax1
|
|
inc rax, rcx
|
|
jmp .main_loop
|
|
|
|
.done:
|
|
; negative?
|
|
bzr rsi, .r
|
|
|
|
; yes
|
|
neg rax
|
|
|
|
.r:
|
|
ret
|
|
|
|
.bad:
|
|
ret
|
|
# 49 "crt/crt.k" 2
|
|
# 1 "./crt/fmt/doprnt.k" 1
|
|
; The OS/K Team licenses this file to you under the MIT license.
|
|
; See the LICENSE file in the project root for more information.
|
|
|
|
;
|
|
; typedef int (*PUTC)(int ch)
|
|
; int doprnt(PUTC putc, int n, const char *fmt, va_list ap)
|
|
;
|
|
doprnt:
|
|
push rbp
|
|
mov rbp, rsp
|
|
|
|
push r12, r13, r14
|
|
push r15, r16, r17
|
|
|
|
mov r12, ax2 ; fmt
|
|
mov r14, ax3 ; va_list
|
|
mov r15, ax1 ; n
|
|
mov r17, ax0 ; putc
|
|
nul r16 ; return value
|
|
|
|
.main_loop:
|
|
; find '%' or null-terminator
|
|
mov rcx, 0x7AFFFFFF
|
|
mov r13, r12
|
|
scasb r13, '%'
|
|
|
|
; everything below r13 is a regular character; print it
|
|
.print_regular:
|
|
beq r12, r13, .check_modf
|
|
|
|
call .doput, b[r12]
|
|
|
|
inc r12, 1
|
|
jmp .print_regular
|
|
|
|
.check_modf:
|
|
; did we find a '%' ?
|
|
; if not, then we found fmt's null-terminator; we're done
|
|
bne b[r12], '%', .epilogue
|
|
|
|
; we did find a modifier / '%'
|
|
mov rax, b[r12+1]
|
|
inc r12, 2
|
|
|
|
beq rax, 's', .modf_s
|
|
beq rax, 'c', .modf_c
|
|
beq rax, 'p', .modf_p
|
|
beq rax, 'x', .modf_x
|
|
beq rax, 'd', .modf_d
|
|
beq rax, 'o', .modf_o
|
|
beq rax, 'b', .modf_b
|
|
beq rax, '%', .modf_percent
|
|
|
|
; unrecognized
|
|
jmp .bad_modifier
|
|
|
|
.modf_s:
|
|
; get string address
|
|
mov r13, q[r14]
|
|
inc r14, 8
|
|
|
|
bzr r13, .nullstring
|
|
|
|
.print_string:
|
|
movzx ax0, b[r13]
|
|
bzr ax0, .main_loop
|
|
|
|
inc r13
|
|
call .doput
|
|
|
|
jmp .print_string
|
|
|
|
.modf_c:
|
|
call .doput, q[r14]
|
|
inc r14, 8
|
|
|
|
jmp .main_loop
|
|
|
|
.modf_p:
|
|
call .doput, '0'
|
|
call .doput, 'x'
|
|
; Fallthrough
|
|
|
|
.modf_x:
|
|
mov ax2, 16
|
|
jmp .print_number
|
|
|
|
.modf_d:
|
|
mov ax2, 10
|
|
jmp .print_number
|
|
|
|
.modf_o:
|
|
mov ax2, 8
|
|
jmp .print_number
|
|
|
|
.modf_b:
|
|
mov ax2, 2
|
|
jmp .print_number
|
|
|
|
.print_number:
|
|
; allocate itoa conversion buffer
|
|
sub rsp, 80
|
|
mov r13, rsp
|
|
|
|
; assume modifier already set up ax2
|
|
call itoa, rsp, q[r14]
|
|
inc r14, 8
|
|
|
|
.print_itoa_buf:
|
|
movzx ax0, b[r13]
|
|
|
|
bzr ax0, .pib_end_loop
|
|
inc r13
|
|
|
|
call .doput
|
|
jmp .print_itoa_buf
|
|
|
|
.pib_end_loop:
|
|
inc rsp, 80
|
|
jmp .main_loop
|
|
|
|
.modf_percent:
|
|
call .doput, '%'
|
|
jmp .main_loop
|
|
|
|
.bad_modifier:
|
|
; print "%?" to clearly indicate that something is wrong
|
|
call .doput, '%'
|
|
call .doput, '?'
|
|
|
|
jmp .main_loop
|
|
|
|
.nullstring:
|
|
; %s was passed a NULL
|
|
call .doput, '('
|
|
call .doput, 'n'
|
|
call .doput, 'u'
|
|
call .doput, 'l'
|
|
call .doput, 'l'
|
|
call .doput, ')'
|
|
|
|
jmp .main_loop
|
|
|
|
.epilogue:
|
|
mov rax, r16
|
|
|
|
pop r17, r16
|
|
pop r15, r14
|
|
pop r13, r12
|
|
|
|
leave
|
|
ret
|
|
;
|
|
; prints ax0
|
|
;
|
|
.doput:
|
|
; update print count
|
|
inc r16
|
|
|
|
; if n==0, don't print
|
|
; we follow the C convention that sprintf()-like functions
|
|
; should return the number of characters that would have
|
|
; been printed/written if 'n' were big enough
|
|
bzr r15, .r
|
|
|
|
; decrement n and print
|
|
dec r15
|
|
call r17
|
|
|
|
; did putc fail?
|
|
jraxz .r
|
|
|
|
; yes, so artificially set n=0
|
|
nul r15
|
|
|
|
.r:
|
|
ret
|
|
# 50 "crt/crt.k" 2
|
|
# 1 "./crt/fmt/printf.k" 1
|
|
; The OS/K Team licenses this file to you under the MIT license.
|
|
; See the LICENSE file in the project root for more information.
|
|
|
|
;
|
|
; int putc(int ch)
|
|
;
|
|
putc:
|
|
prn ax0
|
|
nul rax
|
|
ret
|
|
|
|
;
|
|
; int printf(const char *fmt, ...)
|
|
;
|
|
printf:
|
|
mov ax2, ax0
|
|
mov ax0, putc
|
|
mov ax1, 0x7AFFFFFF
|
|
add ax3, rsp, 8
|
|
jmp doprnt
|
|
|
|
;
|
|
; int nprintf(const char *fmt, int n, ...)
|
|
;
|
|
nprintf:
|
|
mov ax2, ax0
|
|
mov ax0, putc
|
|
add ax3, rsp, 8
|
|
jmp doprnt
|
|
|
|
;
|
|
; Print a string
|
|
; Guaranteed to only affect rcx and ax0
|
|
;
|
|
print:
|
|
.l:
|
|
movzx rax, b[ax0]
|
|
jraxz .r
|
|
|
|
prn rax
|
|
inc ax0
|
|
|
|
jmp .l
|
|
|
|
.r:
|
|
ret
|
|
|
|
;
|
|
; Print exactly ax1 characters
|
|
;
|
|
nprint:
|
|
mov rcx, ax1
|
|
jrcxz .r
|
|
|
|
.l:
|
|
prn b[ax0]
|
|
inc ax0
|
|
loop .l
|
|
.r:
|
|
ret
|
|
# 51 "crt/crt.k" 2
|
|
|
|
exit:
|
|
mov rax, Sys.Exit
|
|
trap 0
|
|
|
|
abort:
|
|
crash
|
|
# 8 "command.k" 2
|
|
|
|
|
|
|
|
|
|
; COMMAND.COM guarantees that programs
|
|
; are always loaded on a 16KB boundary
|
|
; This is guaranteed to be the case
|
|
; in all future versions as well
|
|
|
|
|
|
start:
|
|
mov rsp, 0x104000 ; + 16KB
|
|
mov rbp, zero
|
|
|
|
call main
|
|
|
|
mov rax, Sys.EnterHaltMode
|
|
trap 0
|
|
|
|
crash
|
|
|
|
cmd.versionstr = "COMMAND.COM, version 0.1 (KVISC)\nCopyright (C) 2019, The OS/K Team\nMIT license (permissive), see LICENCE file in source tree"
|
|
|
|
argbuf.size := 256
|
|
argbuf = [argbuf.size]
|
|
argv0 = [argbuf.size]
|
|
argv1pos = 0
|
|
|
|
stdin_echoing = 1
|
|
|
|
prompt = [32]
|
|
|
|
main:
|
|
mov rsi, prompt
|
|
mov b[rsi+0], 'C'
|
|
mov b[rsi+1], ':'
|
|
mov b[rsi+2], '\'
|
|
mov b[rsi+3], '>'
|
|
mov b[rsi+4], ' '
|
|
|
|
.print_prompt:
|
|
call print, prompt
|
|
|
|
; empty stuff
|
|
call memzero, argbuf, argbuf.size
|
|
call memzero, argv0, argbuf.size
|
|
nul q[argv1pos]
|
|
|
|
; call nprint, argv0, argbuf.size
|
|
|
|
; iterator through argbuf
|
|
nul rcx
|
|
|
|
.input_loop:
|
|
pause
|
|
pause
|
|
pause
|
|
|
|
; Fill .buf with user input
|
|
scan rax
|
|
jraxz .input_loop
|
|
|
|
; ESC key pressed?
|
|
beq rax, 0x1B, .handle_EXIT
|
|
|
|
; backspace character?
|
|
bne rax, 8, .handle_input
|
|
|
|
; anything to delete?
|
|
jrcxz .input_loop ; no
|
|
|
|
; yes, delete it
|
|
dec rcx
|
|
add rdx, rcx, argbuf
|
|
nul b[rdx]
|
|
|
|
; update screen
|
|
bzr b[stdin_echoing], .input_loop
|
|
prn 8
|
|
|
|
jmp .input_loop
|
|
|
|
.handle_input:
|
|
bzr b[stdin_echoing], .se.z
|
|
prn rax
|
|
|
|
.se.z:
|
|
beq rax, 10, .extract_argv0
|
|
|
|
; when max line length is reached,
|
|
; force a newline
|
|
beq rcx, argbuf.size, .extract_argv0
|
|
|
|
; add character to buffer and increase iterator (rcx)
|
|
add rdx, rcx, argbuf
|
|
mov b[rdx], rax
|
|
inc rcx
|
|
|
|
; another one
|
|
jmp .input_loop
|
|
|
|
.extract_argv0:
|
|
; did we read anything at all?
|
|
; if not, just go back to waiting input
|
|
jrcxz .print_prompt
|
|
|
|
; find first whitespace or null-terminator
|
|
mov rcx, argbuf.size
|
|
mov rdx, argbuf
|
|
scasb rdx, ' '
|
|
|
|
; argv1 exists? if so, save its position
|
|
mov rsi, rdx
|
|
|
|
.next_space:
|
|
mov rcx, b[rsi]
|
|
jrcxz .do_extract
|
|
|
|
; skip spaces
|
|
bne rcx, ' ', .not_a_space
|
|
inc rsi
|
|
jmp .next_space
|
|
|
|
.not_a_space:
|
|
; if we're here, we found a
|
|
; non-zero non-space character
|
|
mov q[argv1pos], rsi
|
|
|
|
; fallthrough
|
|
|
|
.do_extract:
|
|
; how much do we copy?
|
|
sub rcx, rdx, argbuf
|
|
jrcxz .detect_builtin
|
|
dec rcx
|
|
|
|
mov rdi, argbuf
|
|
mov rsi, argv0
|
|
|
|
.copy_loop:
|
|
mov b[rsi], b[rdi]
|
|
|
|
inc rdi
|
|
inc rsi
|
|
|
|
loop .copy_loop
|
|
|
|
.detect_builtin:
|
|
|
|
.builtin_cls = "cls"
|
|
call strcmp, argv0, .builtin_cls
|
|
jraxz .handle_CLS
|
|
|
|
.builtin_crash = "crash"
|
|
call strcmp, argv0, .builtin_crash
|
|
jraxz .handle_CRASH
|
|
|
|
.builtin_date = "date"
|
|
call strcmp, argv0, .builtin_date
|
|
jraxz .handle_DATE
|
|
|
|
.builtin_dir = "dir"
|
|
call strcmp, argv0, .builtin_dir
|
|
jraxz .handle_DIR
|
|
|
|
.builtin_dump = "dump"
|
|
call strcmp, argv0, .builtin_dump
|
|
jraxz .handle_DUMP
|
|
|
|
.builtin_echo = "echo"
|
|
call strcmp, argv0, .builtin_echo
|
|
jraxz .handle_ECHO
|
|
|
|
.builtin_erase = "erase"
|
|
call strcmp, argv0, .builtin_erase
|
|
jraxz .handle_ERASE
|
|
|
|
.builtin_exit = "exit"
|
|
call strcmp, argv0, .builtin_exit
|
|
jraxz .handle_EXIT
|
|
|
|
.builtin_help = "help"
|
|
call strcmp, argv0, .builtin_help
|
|
jraxz .handle_HELP
|
|
|
|
.builtin_halt = "halt"
|
|
call strcmp, argv0, .builtin_halt
|
|
jraxz .handle_HALT
|
|
|
|
.builtin_make = "make"
|
|
call strcmp, argv0, .builtin_make
|
|
jraxz .handle_MAKE
|
|
|
|
.builtin_print = "print"
|
|
call strcmp, argv0, .builtin_print
|
|
jraxz .handle_PRINT
|
|
|
|
.builtin_prompt = "prompt"
|
|
call strcmp, argv0, .builtin_prompt
|
|
jraxz .handle_PROMPT
|
|
|
|
.builtin_remove = "remove"
|
|
call strcmp, argv0, .builtin_remove
|
|
jraxz .handle_REMOVE
|
|
|
|
.builtin_time = "time"
|
|
call strcmp, argv0, .builtin_time
|
|
jraxz .handle_TIME
|
|
|
|
.builtin_vers = "vers"
|
|
call strcmp, argv0, .builtin_vers
|
|
jraxz .handle_VERS
|
|
|
|
jmp .try_exec
|
|
|
|
;
|
|
; call builtins
|
|
;
|
|
|
|
# 1 "usr/cmd-dir.k" 1
|
|
; The OS/K Team licenses this file to you under the MIT license.
|
|
; See the LICENSE file in the project root for more information.
|
|
|
|
|
|
|
|
.handle_DIR:
|
|
push rbp
|
|
mov rbp, rsp
|
|
|
|
push r12, r13
|
|
push r14, r15
|
|
|
|
nul r12 ; no. of files found
|
|
nul r13 ; no. of directories found
|
|
nul r14 ; total amount of bytes found
|
|
|
|
call print, .dirmsg
|
|
|
|
.first:
|
|
mov rax, Sys.FindFirst
|
|
mov ax0, .buf
|
|
mov ax1, 0x80
|
|
trap 0
|
|
|
|
jmp .list
|
|
|
|
.next:
|
|
mov rax, Sys.FindNext
|
|
mov ax0, .buf
|
|
mov ax1, 0x80
|
|
trap 0
|
|
|
|
.list:
|
|
jraxz .end
|
|
|
|
mov r15, rcx ; file size
|
|
inc r14, rcx
|
|
|
|
; directory?
|
|
bnz rdx, .is_dir
|
|
|
|
; found a file
|
|
inc r12
|
|
|
|
; separate extension from file name
|
|
mov rcx, 0x80
|
|
mov rsi, .buf
|
|
mov rdi, rsi
|
|
scasb rsi, '.'
|
|
|
|
; print file name
|
|
sub ax1, rsi, rdi
|
|
dec ax1
|
|
call nprint, rdi
|
|
|
|
; calculate where to put extension
|
|
sub rdi, rsi, .buf
|
|
dec rdi
|
|
|
|
.ext_pad:
|
|
; print at least 11 non-space characters before extension
|
|
blte 11, rdi, .print_ext
|
|
prn ' '
|
|
inc rdi
|
|
jmp .ext_pad
|
|
|
|
.print_ext:
|
|
prn ' '
|
|
; here we print at least 4 characters excluding '.'
|
|
mov rcx, 4
|
|
|
|
bne b[rsi], '.', .print_ext.1
|
|
inc rsi
|
|
|
|
.print_ext.1:
|
|
bzr b[rsi], .print_ext.2
|
|
|
|
; print and decrease rcx, unless it's already 0
|
|
prn b[rsi]
|
|
inc rsi
|
|
jrcxz .print_ext.1
|
|
|
|
dec rcx
|
|
jmp .print_ext.1
|
|
|
|
.print_ext.2:
|
|
; did we print at least 4 bytes?
|
|
jrcxz .print_bytes ; yes, carry on
|
|
|
|
.pe2.l:
|
|
prn ' '
|
|
loop .pe2.l
|
|
|
|
.print_bytes:
|
|
; print file size in bytes
|
|
prn ' '
|
|
prn ' '
|
|
prn ' '
|
|
|
|
shr rax, r15, 10
|
|
and r15, 1023
|
|
|
|
push r15, rax
|
|
call printf, .bytesstr
|
|
inc rsp, 16
|
|
|
|
.prepare_next:
|
|
; go find next entry
|
|
prn 10
|
|
jmp .next
|
|
|
|
.end:
|
|
shr rax, r14, 10
|
|
shr rdx, rax, 10
|
|
and rax, 1023
|
|
and r14, 1023
|
|
|
|
push r14, rax, rdx
|
|
call printf, .endstr0
|
|
inc rsp, 24
|
|
|
|
push r13, r12
|
|
call printf, .endstr1
|
|
inc rsp, 16
|
|
|
|
pop r15, r14
|
|
pop r13, r12
|
|
|
|
leave
|
|
jmp .print_prompt
|
|
|
|
; special case: direcory
|
|
.is_dir:
|
|
inc r13
|
|
|
|
; use printf instead of print
|
|
; because it returns the # of
|
|
; printed characters
|
|
call printf, .buf
|
|
|
|
blte 11, rax, .dir_no_pad
|
|
sub rcx, 11, rax
|
|
dec rcx
|
|
|
|
.dir.l:
|
|
prn ' '
|
|
loop .dir.l
|
|
|
|
.dir_no_pad:
|
|
call print, .dir_ext
|
|
|
|
jmp .print_bytes
|
|
|
|
.buf = [0x80]
|
|
.dir_ext = " <DIR> "
|
|
.endstr0 = " total %dMB + %dKB + %dB\n"
|
|
.endstr1 = " found %d file(s), %d dir(s)\n"
|
|
.dirmsg = "Directory of C:\\\n\n"
|
|
|
|
.bytesstr = "%d kilobytes + %d bytes"
|
|
; .bytesstr = "%dMB + %dKB + %dB" # too soon
|
|
# 228 "command.k" 2
|
|
# 1 "usr/cmd-exec.k" 1
|
|
; The OS/K Team licenses this file to you under the MIT license.
|
|
; See the LICENSE file in the project root for more information.
|
|
|
|
.try_exec:
|
|
; try without appending ".com"
|
|
mov rax, Sys.OpenFile
|
|
mov ax0, argv0
|
|
trap 0
|
|
|
|
; we good?
|
|
blte zero, rax, .do_exec
|
|
|
|
; nope, append ".com" and try again
|
|
sub rcx, argbuf.size, 5
|
|
scasb ax0, zero ; find null-term
|
|
mov b[ax0+0], '.' ; ".com"
|
|
mov b[ax0+1], 'c'
|
|
mov b[ax0+2], 'o'
|
|
mov b[ax0+3], 'm'
|
|
nul b[ax0+4]
|
|
|
|
; try again
|
|
mov rax, Sys.OpenFile
|
|
mov ax0, argv0
|
|
trap 0
|
|
|
|
; still no good?
|
|
bltz rax, .exec_not_found
|
|
|
|
.do_exec:
|
|
; load file into memory
|
|
mov ax0, rax
|
|
mov ax1, 0x108000 ; + 32KB
|
|
mov ax2, 0x8000
|
|
mov rax, Sys.ReadFile
|
|
trap 0
|
|
|
|
; save load address
|
|
mov rcx, rax
|
|
|
|
; close file
|
|
mov rax, Sys.CloseFile
|
|
trap 0
|
|
|
|
; read anything?
|
|
bltz rcx, .couldnt_read
|
|
jrcxz .empty_file
|
|
|
|
; all good, let's go
|
|
mov rax, Sys.ExecuteInFrame
|
|
mov ax0, 0x108000 ; + 32KB
|
|
mov ax1, 5
|
|
trap 0
|
|
|
|
; unreachable
|
|
jmp abort
|
|
# 229 "command.k" 2
|
|
# 1 "usr/cmd-fsmisc.k" 1
|
|
; The OS/K Team licenses this file to you under the MIT license.
|
|
; See the LICENSE file in the project root for more information.
|
|
|
|
.handle_ERASE:
|
|
mov rax, Sys.RemoveFile
|
|
mov ax0, q[argv1pos]
|
|
bzr ax0, .need_params
|
|
trap 0
|
|
|
|
bltz rax, .couldnt_remove
|
|
|
|
jmp .handle_MAKE ; re-create it back
|
|
|
|
.handle_MAKE:
|
|
mov rax, Sys.CreateFile
|
|
mov ax0, q[argv1pos]
|
|
bzr ax0, .need_params
|
|
trap 0
|
|
|
|
bltz rax, .couldnt_open
|
|
|
|
jmp .print_prompt
|
|
|
|
.handle_PRINT:
|
|
mov rax, Sys.OpenFile
|
|
mov ax0, q[argv1pos]
|
|
bzr ax0, .need_params
|
|
trap 0
|
|
|
|
bltz rax, .file_not_found
|
|
|
|
mov ax0, rax
|
|
mov ax1, 0x108000 ; + 32KB
|
|
mov ax2, 0x8000
|
|
|
|
mov rax, Sys.ReadFile
|
|
trap 0
|
|
|
|
mov rcx, rax
|
|
|
|
mov rax, Sys.CloseFile
|
|
trap 0
|
|
|
|
bltz rcx, .couldnt_read
|
|
jrcxz .empty_file
|
|
|
|
call nprint, 0x108000 ; + 32KB, rcx
|
|
|
|
jmp .print_prompt
|
|
|
|
.handle_REMOVE:
|
|
mov rax, Sys.RemoveFile
|
|
mov ax0, q[argv1pos]
|
|
bzr ax0, .need_params
|
|
trap 0
|
|
|
|
bltz rax, .couldnt_remove
|
|
|
|
jmp .print_prompt
|
|
# 230 "command.k" 2
|
|
|
|
.handle_CLS:
|
|
prn 0x8BF00001
|
|
jmp .print_prompt
|
|
|
|
.handle_CRASH:
|
|
jmp abort
|
|
|
|
.handle_DATE:
|
|
call GetTimeUTC
|
|
|
|
mov rcx, b[rax+4]
|
|
inc rcx
|
|
|
|
push b[rax+3], rcx, w[rax+6]
|
|
call printf, .datefmt
|
|
inc rsp, 40
|
|
|
|
jmp .print_prompt
|
|
|
|
.datefmt = "%d/%d/%d\n"
|
|
|
|
.handle_DUMP:
|
|
dump
|
|
jmp .print_prompt
|
|
|
|
.handle_ECHO:
|
|
mov rax, q[argv1pos]
|
|
jraxz .echo.end
|
|
|
|
call print, rax
|
|
|
|
.echo.end:
|
|
prn 10
|
|
jmp .print_prompt
|
|
|
|
.handle_EXIT:
|
|
mov rax, Sys.Shutdown
|
|
trap 0
|
|
jmp .print_prompt
|
|
|
|
.handle_HALT:
|
|
mov rax, Sys.EnterHaltMode
|
|
trap 0
|
|
jmp .print_prompt
|
|
|
|
.handle_PROMPT:
|
|
mov ax0, prompt
|
|
mov ax1, q[argv1pos]
|
|
bzr ax1, .need_params
|
|
call strcpy
|
|
|
|
jmp .print_prompt
|
|
|
|
.handle_TIME:
|
|
call GetTimeUTC
|
|
|
|
push b[rax], b[rax+1], b[rax+2]
|
|
call printf, .timefmt
|
|
inc rsp, 24
|
|
|
|
jmp .print_prompt
|
|
|
|
.timefmt = "%d:%d:%d\n"
|
|
|
|
.handle_VERS:
|
|
call print, cmd.versionstr
|
|
prn 10
|
|
|
|
jmp .print_prompt
|
|
|
|
.handle_HELP:
|
|
call print, .helpmsg
|
|
call print, .helpmsg.cls
|
|
call print, .helpmsg.date
|
|
call print, .helpmsg.dir
|
|
call print, .helpmsg.dump
|
|
call print, .helpmsg.echo
|
|
call print, .helpmsg.erase
|
|
call print, .helpmsg.exit
|
|
call print, .helpmsg.help
|
|
call print, .helpmsg.halt
|
|
call print, .helpmsg.make
|
|
call print, .helpmsg.print
|
|
call print, .helpmsg.prompt
|
|
call print, .helpmsg.remove
|
|
call print, .helpmsg.time
|
|
call print, .helpmsg.ver
|
|
|
|
jmp .print_prompt
|
|
|
|
.helpmsg = "The following commands are built-in:\n"
|
|
.helpmsg.cls = " CLS Clear screen\n"
|
|
.helpmsg.date = " DATE Display current date\n"
|
|
.helpmsg.dir = " DIR Print contents of current directory\n"
|
|
.helpmsg.dump = " DUMP Toggles debug instruction dumping\n"
|
|
.helpmsg.echo = " ECHO Write arguments to standard output\n"
|
|
.helpmsg.erase = " ERASE Clear a file, making it blank\n"
|
|
.helpmsg.exit = " EXIT Initiate machine shutdown\n"
|
|
.helpmsg.help = " HELP Display these messages\n"
|
|
.helpmsg.halt = " HALT Put processor in halt mode\n"
|
|
.helpmsg.make = " MAKE Create an empty file\n"
|
|
.helpmsg.print = " PRINT Display contents of text file\n"
|
|
.helpmsg.prompt = " PROMPT Change the command line prompt\n"
|
|
.helpmsg.remove = " REMOVE Delete a file (permanently)\n"
|
|
.helpmsg.time = " TIME Display current time of day\n"
|
|
.helpmsg.ver = " VERS Display current COMMAND.COM version\n"
|
|
|
|
.exec_not_found:
|
|
push argv0
|
|
call printf, .enf_errmsg
|
|
inc rsp, 8
|
|
|
|
jmp .print_prompt
|
|
|
|
.enf_errmsg = "%s: file not found\n"
|
|
|
|
.file_not_found:
|
|
push q[argv1pos], argv0
|
|
call printf, .fnf_errmsg
|
|
inc rsp, 16
|
|
|
|
jmp .print_prompt
|
|
|
|
.fnf_errmsg = "%s: %s: file not found\n"
|
|
|
|
.empty_file:
|
|
push q[argv1pos], argv0
|
|
call printf, .ef_errmsg
|
|
inc rsp, 16
|
|
|
|
jmp .print_prompt
|
|
|
|
.ef_errmsg = "%s: %s: file was empty\n"
|
|
|
|
.couldnt_open:
|
|
push q[argv1pos], argv0
|
|
call printf, .cno_errmsg
|
|
inc rsp, 16
|
|
|
|
jmp .print_prompt
|
|
|
|
.cno_errmsg = "%s: %s: an error occured while opening file\n"
|
|
|
|
.couldnt_remove:
|
|
push q[argv1pos], argv0
|
|
call printf, .cne_errmsg
|
|
inc rsp, 16
|
|
|
|
jmp .print_prompt
|
|
|
|
.cne_errmsg = "%s: %s: an error occured while removing file\n"
|
|
|
|
.couldnt_read:
|
|
push q[argv1pos], argv0
|
|
call printf, .cnr_errmsg
|
|
inc rsp, 16
|
|
|
|
jmp .print_prompt
|
|
|
|
.cnr_errmsg = "%s: %s: an error occured while reading file\n"
|
|
|
|
.need_params:
|
|
call print, argv0
|
|
call print, .np_errmsg
|
|
|
|
jmp .print_prompt
|
|
|
|
.np_errmsg = ": need more parameters\n"
|