segment readable writable executable
+;;; This is the very first word
+
+ ;; FORTH is the last word of WORDLIST FORTH
+ WORD p_forth,'FORTH',dovalue
+ ;; ( -- )
+ ;; Change to use this wordlist
+ dq last_forth_word
+ dq inline_code
+ mov rax,qword [p_forth_DFA]
+ mov qword [p_wordlist],rax
+ popr rsi
+ next
+
+ WORD p_syscall,'SYSCALL',dodoes,,,8
+ ;; ( -- )
+ ;; Change to use this wordlist
+ dq last_syscall_word
+ dq inline_code
+ mov rax,qword [p_syscall_DFA]
+ mov qword [p_wordlist],rax
+ popr rsi
+ next
+
+last_wordlists_word:
+ WORD p_wordlists,'WORDLISTS',dodoes,,,8
+ ;; ( -- )
+ ;; Change to use this wordlist
+ dq p_wordlists_TFA
+ dq inline_code
+ mov rax,qword [p_wordlists_DFA]
+ mov qword [p_wordlist],rax
+ popr rsi
+ next
+
+include 'wordlists.asm'
+
WORD return_stack,'RS',dovariable
;; The return stack
rb 1048576 ; 1 Mb return stack
popr rsi
next
+ ;; TERMINATE0 terminates the program with code 0
+ ;; ( -- )
+ WORD terminate, 'TERMINATE0',fasm
+ pop rdx
+terminate_special:
+ mov eax,60
+ syscall
+
;;; Execution semantics for FORTH defition word
;;; At entry, rsi points into the calling definition, at the cell
;;; following the cell indicating this word, rax points to the CFA of
;; Execution semantics for a string constant ( -- addr n )
;; rax points to CFA field
dostring:
- add rax,8
- xor rbx,rbx
- mov bl,[rax]
- inc rax
- push rax
- push rbx
+ cfa2dfa rax
+ pushpname rax
next
-include 'wordlists.asm'
-include 'syscalls.asm'
include 'memory.asm'
include 'stack.asm'
include 'math.asm'
WORD p_stdin,'STDIN',dovalue
;; Initialised to hold a STREAM for fd 0
dq 0
-
+
+;;; The main entry point.
+;;; This word is also the last word before syscalls
+last_forth_word:
WORD p_quit,'QUIT',fasm
;; QUIT is the program entry point ********************
main:
push 0
DOFORTH sys_exit
- ;; TERMINATE0 terminates the program with code 0
- ;; ( v -- )
- WORD terminate, 'TERMINATE',fasm
- pop rdx
-terminate_special:
- mov eax,60
- syscall
+ previous_word = last_wordlists_word
-last_word:
- ;; FORTH is the last word of VOCABULARY FORTH
- WORD forth,'FORTH',dovalue
- dq forth_TFA
- dq 0
+include 'syscalls.asm'
+last_word:
+
heap_start: