Adding dlsym.
This commit is contained in:
Brad Nelson
@ -4,9 +4,10 @@ out:
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mkdir -p out
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mkdir -p out
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out/ueforth: ueforth.c | out
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out/ueforth: ueforth.c | out
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$(CC) $(CFLAGS) $< -o $@
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$(CC) $(CFLAGS) $< -o $@ $(LIBS)
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CFLAGS=-O2 -Wall -Werror
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CFLAGS=-O2 -Wall -Werror
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LIBS=-ldl
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clean:
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clean:
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rm -rf out/
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rm -rf out/
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@ -1,3 +1,4 @@
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#include <dlfcn.h>
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#include <inttypes.h>
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#include <inttypes.h>
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#include <stdint.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdio.h>
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@ -65,10 +66,10 @@ typedef uint64_t udcell_t;
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X("TYPE", OP_TYPE, fwrite((void *) *sp, 1, tos, stdout); --sp; DROP) \
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X("TYPE", OP_TYPE, fwrite((void *) *sp, 1, tos, stdout); --sp; DROP) \
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X("KEY", OP_KEY, DUP; tos = fgetc(stdin)) \
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X("KEY", OP_KEY, DUP; tos = fgetc(stdin)) \
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X("SYSEXIT", OP_SYSEXIT, DUP; exit(tos)) \
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X("SYSEXIT", OP_SYSEXIT, DUP; exit(tos)) \
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X("FIND", OP_FIND, *sp = find((const char *) *sp, tos); DROP) \
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X("FIND", OP_FIND, tos = find((const char *) *sp, tos); --sp) \
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X("PARSE", OP_PARSE, DUP; tos = parse(tos, sp)) \
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X("PARSE", OP_PARSE, DUP; tos = parse(tos, sp)) \
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X("S>NUMBER?", OP_CONVERT, tos = convert((const char *) *sp, tos, sp); \
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X("S>NUMBER?", OP_CONVERT, tos = convert((const char *) *sp, tos, sp); \
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if (!tos) DROP) \
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if (!tos) --sp) \
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X("CREATE", OP_CREATE, t = parse(32, &tmp); \
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X("CREATE", OP_CREATE, t = parse(32, &tmp); \
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create((const char *) tmp, t, 0, && OP_DOCREATE); \
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create((const char *) tmp, t, 0, && OP_DOCREATE); \
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*g_heap++ = 0) \
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*g_heap++ = 0) \
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@ -83,6 +84,14 @@ typedef uint64_t udcell_t;
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X("#TIB", OP_NTIB, DUP; tos = (cell_t) &g_ntib) \
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X("#TIB", OP_NTIB, DUP; tos = (cell_t) &g_ntib) \
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X(">IN", OP_TIN, DUP; tos = (cell_t) &g_tin) \
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X(">IN", OP_TIN, DUP; tos = (cell_t) &g_tin) \
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X("'THROW", OP_TTHROW, DUP; tos = (cell_t) &g_throw) \
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X("'THROW", OP_TTHROW, DUP; tos = (cell_t) &g_throw) \
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X("DLSYM", OP_DLSYM, tos = (cell_t) dlsym((void *) *sp, (void *) tos); --sp) \
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X("CALL0", OP_CALL0, tos = ((cell_t (*)()) tos)()) \
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X("CALL1", OP_CALL1, tos = ((cell_t (*)()) tos)(*sp); --sp) \
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X("CALL2", OP_CALL2, tos = ((cell_t (*)()) tos)(sp[-1], *sp); sp -= 2) \
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X("CALL3", OP_CALL3, tos = ((cell_t (*)()) tos)(sp[-2], sp[-1], *sp); sp -= 3) \
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X("CALL4", OP_CALL4, tos = ((cell_t (*)()) tos)(sp[-3], sp[-2], sp[-1], *sp); sp -= 4) \
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X("CALL5", OP_CALL5, tos = ((cell_t (*)()) tos)(sp[-4], sp[-3], sp[-2], sp[-1], *sp); sp -= 5) \
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X("CALL6", OP_CALL6, tos = ((cell_t (*)()) tos)(sp[-5], sp[-4], sp[-3], sp[-2], sp[-1], *sp); sp -= 6) \
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X(":", OP_COLON, t = parse(32, &tmp); \
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X(":", OP_COLON, t = parse(32, &tmp); \
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create((const char *) tmp, t, 0, && OP_DOCOL); \
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create((const char *) tmp, t, 0, && OP_DOCOL); \
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g_state = -1) \
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g_state = -1) \
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@ -218,6 +227,8 @@ static const char boot[] =
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" : .\" [char] \" parse postpone $. dup , 0 do dup c@ c, 1+ loop drop align ; immediate "
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" : .\" [char] \" parse postpone $. dup , 0 do dup c@ c, 1+ loop drop align ; immediate "
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" : $@ r@ dup cell+ swap @ r> dup @ aligned + cell+ >r ; "
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" : $@ r@ dup cell+ swap @ r> dup @ aligned + cell+ >r ; "
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" : s\" [char] \" parse postpone $@ dup , 0 do dup c@ c, 1+ loop drop align ; immediate "
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" : s\" [char] \" parse postpone $@ dup , 0 do dup c@ c, 1+ loop drop align ; immediate "
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" : z$@ r@ cell+ r> dup @ aligned + cell+ >r ; "
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" : z\" [char] \" parse postpone z$@ dup 1+ , 0 do dup c@ c, 1+ loop drop 0 c, align ; immediate "
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// Examine Dictionary
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// Examine Dictionary
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" : >name ( xt -- a n ) 3 cells - dup @ swap over aligned - swap ; "
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" : >name ( xt -- a n ) 3 cells - dup @ swap over aligned - swap ; "
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356
ueforth/ueforth.js
Normal file
356
ueforth/ueforth.js
Normal file
@ -0,0 +1,356 @@
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'use strict';
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(function() {
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const HEAP_SIZE = 10 * 1024 * 1024;
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const STACK_SIZE = 16 * 1024;
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#define DUP *++sp = tos
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#define DROP tos = *sp--
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#define NEXT w = *ip++; goto **(void **) w
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#define CELL_LEN(n) (((n) + sizeof(cell_t) - 1) / sizeof(cell_t))
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#define FIND(name) find(name, sizeof(name) - 1)
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#define LOWER(ch) ((ch) & 95)
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#define OPCODE_LIST \
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X("0=", OP_ZEQUAL, tos = !tos ? -1 : 0) \
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X("0<", OP_ZLESS, tos = tos < 0 ? -1 : 0) \
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X("+", OP_PLUS, tos += *sp--) \
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X("UM/MOD", OP_UMSMOD, ud = *(udcell_t *) &sp[-1]; \
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*--sp = (cell_t) (ud % tos); \
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tos = (cell_t) (ud / tos)) \
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X("*/MOD", OP_SSMOD, d = (dcell_t) *sp * (dcell_t) sp[-1]; \
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*--sp = (cell_t) (d % tos); \
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tos = (cell_t) (d / tos)) \
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X("AND", OP_AND, tos &= *sp--) \
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X("OR", OP_OR, tos |= *sp--) \
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X("XOR", OP_XOR, tos ^= *sp--) \
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X("DUP", OP_DUP, DUP) \
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X("SWAP", OP_SWAP, t = tos; tos = *sp; *sp = t) \
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X("OVER", OP_OVER, DUP; tos = sp[-1]) \
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X("DROP", OP_DROP, DROP) \
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X("@", OP_AT, tos = *(cell_t *) tos) \
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X("C@", OP_CAT, tos = *(uint8_t *) tos) \
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X("!", OP_STORE, *(cell_t *) tos = *sp; --sp; DROP) \
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X("C!", OP_CSTORE, *(uint8_t *) tos = *sp; --sp; DROP) \
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X("FILL", OP_FILL, memset((void *) sp[-1], tos, *sp); sp -= 2; DROP) \
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X("MOVE", OP_MOVE, memmove((void *) sp[-1], (void *) *sp, tos); sp -= 2; DROP) \
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X("SP@", OP_SPAT, DUP; tos = (cell_t) sp) \
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X("SP!", OP_SPSTORE, sp = (cell_t *) tos; DROP) \
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X("RP@", OP_RPAT, DUP; tos = (cell_t) rp) \
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X("RP!", OP_RPSTORE, rp = (cell_t *) tos; DROP) \
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X(">R", OP_TOR, *++rp = tos; DROP) \
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X("R>", OP_FROMR, DUP; tos = *rp--) \
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X("R@", OP_RAT, DUP; tos = *rp) \
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X("EXECUTE", OP_EXECUTE, w = tos; DROP; goto **(void **) w) \
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X("BRANCH", OP_BRANCH, ip = (cell_t *) *ip) \
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X("0BRANCH", OP_ZBRANCH, if (!tos) ip = (cell_t *) *ip; else ++ip; DROP) \
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X("DONEXT", OP_DONEXT, if ((*rp)--) ip = (cell_t *) *ip; else (--rp, ++ip)) \
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X("DOLIT", OP_DOLIT, DUP; tos = *(cell_t *) ip++) \
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X("ALITERAL", OP_ALITERAL, *g_heap++ = g_DOLIT_XT; *g_heap++ = tos; DROP) \
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X("CELL", OP_CELL, DUP; tos = sizeof(cell_t)) \
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X("TYPE", OP_TYPE, fwrite((void *) *sp, 1, tos, stdout); --sp; DROP) \
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X("KEY", OP_KEY, DUP; tos = fgetc(stdin)) \
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X("SYSEXIT", OP_SYSEXIT, DUP; exit(tos)) \
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X("FIND", OP_FIND, *sp = find((const char *) *sp, tos); DROP) \
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X("PARSE", OP_PARSE, DUP; tos = parse(tos, sp)) \
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X("S>NUMBER?", OP_CONVERT, tos = convert((const char *) *sp, tos, sp); \
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if (!tos) DROP) \
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X("CREATE", OP_CREATE, t = parse(32, &tmp); \
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create((const char *) tmp, t, 0, && OP_DOCREATE); \
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*g_heap++ = 0) \
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X("DOES>", OP_DOES, *g_last = (cell_t) && OP_DODOES; \
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g_last[1] = (cell_t) ip; goto OP_EXIT) \
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X("IMMEDIATE", OP_IMMEDIATE, g_last[-1] |= 1) \
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X("'HEAP", OP_HEAP, DUP; tos = (cell_t) &g_heap) \
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X("STATE", OP_STATE, DUP; tos = (cell_t) &g_state) \
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X("BASE", OP_BASE, DUP; tos = (cell_t) &g_base) \
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X("LAST", OP_LAST, DUP; tos = (cell_t) &g_last) \
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X("'TIB", OP_TIB, DUP; tos = (cell_t) &g_tib) \
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X("#TIB", OP_NTIB, DUP; tos = (cell_t) &g_ntib) \
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X(">IN", OP_TIN, DUP; tos = (cell_t) &g_tin) \
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X("'THROW", OP_TTHROW, DUP; tos = (cell_t) &g_throw) \
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X(":", OP_COLON, t = parse(32, &tmp); \
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create((const char *) tmp, t, 0, && OP_DOCOL); \
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g_state = -1) \
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X("EVAL1", OP_EVAL1, DUP; sp = eval1(sp, &tmp); \
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DROP; if (tmp) (w = tmp); \
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if (tmp) goto **(void **) w) \
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X("EXIT", OP_EXIT, ip = (void *) *rp--) \
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X(";", OP_SEMICOLON, *g_heap++ = g_DOEXIT_XT; g_state = 0) \
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var boot = `
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: ( 41 parse drop drop ; immediate
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( Useful Basic Compound Words )
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: 2drop ( n n -- ) drop drop ;
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: 2dup ( a b -- a b a b ) over over ;
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: nip ( a b -- b ) swap drop ;
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: rdrop ( r: n n -- ) r> r> drop >r ;
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: */ ( n n n -- n ) */mod nip ;
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: * ( n n -- n ) 1 */ ;
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: /mod ( n n -- n n ) 1 swap */mod ;
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: / ( n n -- n ) /mod nip ;
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: mod ( n n -- n ) /mod drop ;
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: invert ( n -- ~n ) -1 xor ;
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: negate ( n -- -n ) invert 1 + ;
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: - ( n n -- n ) negate + ;
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: rot ( a b c -- c a b ) >r swap r> swap ;
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: -rot ( a b c -- b c a ) swap >r swap r> ;
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: < ( a b -- a<b ) - 0< ;
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: > ( a b -- a>b ) swap - 0< ;
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: = ( a b -- a!=b ) - 0= ;
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: <> ( a b -- a!=b ) = 0= ;
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: emit ( n -- ) >r rp@ 1 type rdrop ;
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: bl 32 ; : space bl emit ;
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: nl 10 ; : cr nl emit ;
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: 1+ 1 + ; : 1- 1 - ;
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: 2* 2 * ; : 2/ 2 / ;
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: +! ( n a -- ) swap over @ + swap ! ;
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: bye 0 sysexit ;
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( Dictionary and Cells )
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: here ( -- a ) 'heap @ ;
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: allot ( n -- ) 'heap +! ;
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: cell+ ( n -- n ) cell + ;
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: cells ( n -- n ) cell * ;
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: cell/ ( n -- n ) cell / ;
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: aligned ( a -- a ) cell 1 - dup >r + r> invert and ;
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: align here aligned here - allot ;
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: , ( n -- ) here ! cell allot ;
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: c, ( ch -- ) here c! 1 allot ;
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( Compilation State )
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: [ 0 state ! ; immediate
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: ] -1 state ! ; immediate
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( Quoting Words )
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: ' bl parse find ;
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: ['] ' aliteral ; immediate
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: char bl parse drop c@ ;
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: [char] char aliteral ; immediate
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: literal aliteral ; immediate
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( Core Control Flow )
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: begin here ; immediate
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: again ['] branch , , ; immediate
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: until ['] 0branch , , ; immediate
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: ahead ['] branch , here 0 , ; immediate
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: then here swap ! ; immediate
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: if ['] 0branch , here 0 , ; immediate
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: else ['] branch , here 0 , swap here swap ! ; immediate
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: while ['] 0branch , here 0 , swap ; immediate
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: repeat ['] branch , , here swap ! ; immediate
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: aft drop ['] branch , here 0 , here swap ; immediate
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( Compound words requiring conditionals )
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: min 2dup < if drop else nip then ;
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: max 2dup < if nip else drop then ;
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: abs ( n -- +n ) dup 0< if negate then ;
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( Postpone - done here so we have ['] and IF )
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: >flags ( xt -- flags ) cell - ;
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: immediate? ( xt -- f ) >flags @ 1 and 0= 0= ;
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: postpone ' dup immediate? if , else aliteral ['] , , then ; immediate
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( Counted Loops )
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: for postpone >r postpone begin ; immediate
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: next postpone donext , ; immediate
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: do postpone swap postpone >r postpone >r here ; immediate
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: i postpone r@ ; immediate
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: j rp@ 3 cells - @ ;
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: unloop postpone rdrop postpone rdrop ; immediate
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: +loop postpone r> postpone + postpone r>
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postpone 2dup postpone >r postpone >r
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postpone < postpone 0= postpone until
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postpone unloop ; immediate
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: loop 1 aliteral postpone +loop ; immediate
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( Constants and Variables )
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: constant create , does> @ ;
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: variable create 0 , ;
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( Stack Convience )
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sp@ constant sp0
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rp@ constant rp0
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: depth ( -- n ) sp@ sp0 - cell/ ;
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( Exceptions )
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variable handler
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: catch sp@ >r handler @ >r rp@ handler ! execute r> handler ! r> drop 0 ;
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: throw handler @ rp! r> handler ! r> swap >r sp! drop r> ;
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' throw 'throw !
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( Numeric Output )
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variable hld
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: pad ( -- a ) here 80 + ;
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: digit ( u -- c ) 9 over < 7 and + 48 + ;
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: extract ( n base -- n c ) 0 swap um/mod swap digit ;
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: <# ( -- ) pad hld ! ;
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: hold ( c -- ) hld @ 1 - dup hld ! c! ;
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: # ( u -- u ) base @ extract hold ;
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: #s ( u -- 0 ) begin # dup while repeat ;
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: sign ( n -- ) 0< if 45 hold then ;
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: #> ( w -- b u ) drop hld @ pad over - ;
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: str ( n -- b u ) dup >r abs <# #s r> sign #> ;
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: hex ( -- ) 16 base ! ;
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: decimal ( -- ) 10 base ! ;
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: u. ( u -- ) <# #s #> space type ;
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: . ( w -- ) base @ 10 xor if u. exit then str space type ;
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: ? ( a -- ) @ . ;
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( Strings )
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: $. r@ dup cell+ swap @ type r> dup @ aligned + cell+ >r ;
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: .\" [char] \" parse postpone $. dup , 0 do dup c@ c, 1+ loop drop align ; immediate
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||||||
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: $@ r@ dup cell+ swap @ r> dup @ aligned + cell+ >r ;
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: s\" [char] \" parse postpone $@ dup , 0 do dup c@ c, 1+ loop drop align ; immediate
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||||||
|
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||||||
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( Examine Dictionary )
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||||||
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: >name ( xt -- a n ) 3 cells - dup @ swap over aligned - swap ;
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: >link ( xt -- a ) 2 cells - @ ;
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: >body ( xt -- a ) cell+ ;
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: see. ( xt -- ) >name type space ;
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: see-one ( xt -- xt+1 )
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dup @ dup ['] DOLIT = if drop cell+ dup @ . else see. then cell+ ;
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: exit= ( xt -- ) ['] exit = ;
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: see-loop >body begin see-one dup @ exit= until ;
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: see cr ['] : see. ' dup see. see-loop drop ['] ; see. cr ;
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: words last @ begin dup see. >link dup 0= until drop cr ;
|
||||||
|
|
||||||
|
( Input )
|
||||||
|
: accept ( a n -- n ) 0 swap begin 2dup < while
|
||||||
|
key dup nl = if 2drop nip exit then
|
||||||
|
>r rot r> over c! 1+ -rot swap 1+ swap repeat drop nip ;
|
||||||
|
200 constant input-limit
|
||||||
|
: tib ( -- a ) 'tib @ ;
|
||||||
|
create input-buffer input-limit allot
|
||||||
|
: tib-setup input-buffer 'tib ! ;
|
||||||
|
: refill tib-setup tib input-limit accept #tib ! 0 >in ! -1 ;
|
||||||
|
|
||||||
|
( REPL )
|
||||||
|
: prompt .\" ok\" cr ;
|
||||||
|
: eval-line begin >in @ #tib @ < while eval1 repeat ;
|
||||||
|
: query begin ['] eval-line catch if .\" ERROR\" cr then prompt refill drop again ;
|
||||||
|
: ok .\" uEForth\" cr prompt refill drop query ;
|
||||||
|
ok
|
||||||
|
`;
|
||||||
|
|
||||||
|
static cell_t *g_heap;
|
||||||
|
static const char *g_tib;
|
||||||
|
static cell_t g_ntib = sizeof(boot), g_tin = 0;
|
||||||
|
static cell_t *g_last = 0, g_base = 10, g_state = 0, g_throw = 0;
|
||||||
|
static cell_t g_DOLIT_XT, g_DOEXIT_XT;
|
||||||
|
|
||||||
|
static cell_t convert(const char *pos, cell_t n, cell_t *ret) {
|
||||||
|
*ret = 0;
|
||||||
|
cell_t negate = 0;
|
||||||
|
if (!n) { return 0; }
|
||||||
|
if (pos[0] == '-') { negate = -1; ++pos; --n; }
|
||||||
|
for (; n; --n) {
|
||||||
|
uintptr_t d = pos[0] - '0';
|
||||||
|
if (d > 9) {
|
||||||
|
d = LOWER(d) - 7;
|
||||||
|
if (d < 10) { return 0; }
|
||||||
|
}
|
||||||
|
if (d >= (uintptr_t) g_base) { return 0; }
|
||||||
|
*ret = *ret * g_base + d;
|
||||||
|
++pos;
|
||||||
|
}
|
||||||
|
if (negate) { *ret = -*ret; }
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
static cell_t same(const char *a, const char *b, cell_t len) {
|
||||||
|
for (;len && LOWER(*a) == LOWER(*b); --len, ++a, ++b);
|
||||||
|
return len;
|
||||||
|
}
|
||||||
|
|
||||||
|
static cell_t find(const char *name, cell_t len) {
|
||||||
|
cell_t *pos = g_last;
|
||||||
|
cell_t clen = CELL_LEN(len);
|
||||||
|
while (pos) {
|
||||||
|
if (len == pos[-3] &&
|
||||||
|
same(name, (const char *) &pos[-3 - clen], len) == 0) {
|
||||||
|
return (cell_t) pos;
|
||||||
|
}
|
||||||
|
pos = (cell_t *) pos[-2]; // Follow link
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void create(const char *name, cell_t length, cell_t flags, void *op) {
|
||||||
|
memcpy(g_heap, name, length); // name
|
||||||
|
g_heap += CELL_LEN(length);
|
||||||
|
*g_heap++ = length; // length
|
||||||
|
*g_heap++ = (cell_t) g_last; // link
|
||||||
|
*g_heap++ = flags; // flags
|
||||||
|
g_last = g_heap;
|
||||||
|
*g_heap++ = (cell_t) op; // code
|
||||||
|
}
|
||||||
|
|
||||||
|
static cell_t parse(cell_t sep, cell_t *ret) {
|
||||||
|
while (g_tin < g_ntib && g_tib[g_tin] == sep) { ++g_tin; }
|
||||||
|
*ret = (cell_t) (g_tib + g_tin);
|
||||||
|
while (g_tin < g_ntib && g_tib[g_tin] != sep) { ++g_tin; }
|
||||||
|
cell_t len = g_tin - (*ret - (cell_t) g_tib);
|
||||||
|
if (g_tin < g_ntib) { ++g_tin; }
|
||||||
|
return len;
|
||||||
|
}
|
||||||
|
|
||||||
|
static cell_t *eval1(cell_t *sp, cell_t *call) {
|
||||||
|
*call = 0;
|
||||||
|
cell_t name;
|
||||||
|
cell_t len = parse(' ', &name);
|
||||||
|
cell_t xt = find((const char *) name, len);
|
||||||
|
if (xt) {
|
||||||
|
if (g_state && !(((cell_t *) xt)[-1] & 1)) { // bit 0 of flags is immediate
|
||||||
|
*g_heap++ = xt;
|
||||||
|
} else {
|
||||||
|
*call = xt;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
cell_t n;
|
||||||
|
cell_t ok = convert((const char *) name, len, &n);
|
||||||
|
if (ok) {
|
||||||
|
if (g_state) {
|
||||||
|
*g_heap++ = g_DOLIT_XT;
|
||||||
|
*g_heap++ = n;
|
||||||
|
} else {
|
||||||
|
*++sp = n;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
*++sp = -1;
|
||||||
|
*call = g_throw;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return sp;
|
||||||
|
}
|
||||||
|
|
||||||
|
int main(int argc, char *argv[]) {
|
||||||
|
g_heap = malloc(HEAP_SIZE);
|
||||||
|
register cell_t *sp = g_heap; g_heap += STACK_SIZE;
|
||||||
|
register cell_t *rp = g_heap; g_heap += STACK_SIZE;
|
||||||
|
register cell_t tos = 0, *ip, t, w;
|
||||||
|
dcell_t d;
|
||||||
|
udcell_t ud;
|
||||||
|
cell_t tmp;
|
||||||
|
#define X(name, op, code) create(name, sizeof(name) - 1, name[0] == ';', && op);
|
||||||
|
OPCODE_LIST
|
||||||
|
#undef X
|
||||||
|
g_last[-1] = 1; // Make ; IMMEDIATE
|
||||||
|
g_DOLIT_XT = FIND("DOLIT");
|
||||||
|
g_DOEXIT_XT = FIND("EXIT");
|
||||||
|
ip = g_heap;
|
||||||
|
*g_heap++ = FIND("EVAL1");
|
||||||
|
*g_heap++ = FIND("BRANCH");
|
||||||
|
*g_heap++ = (cell_t) ip;
|
||||||
|
g_tib = boot;
|
||||||
|
NEXT;
|
||||||
|
#define X(name, op, code) op: code; NEXT;
|
||||||
|
OPCODE_LIST
|
||||||
|
#undef X
|
||||||
|
OP_DOCREATE: DUP; tos = w + sizeof(cell_t) * 2; NEXT;
|
||||||
|
OP_DODOES: DUP; tos = w + sizeof(cell_t) * 2;
|
||||||
|
*++rp = (cell_t) ip; ip = (cell_t *) *(cell_t *) (w + sizeof(cell_t)); NEXT;
|
||||||
|
OP_DOCOL: *++rp = (cell_t) ip; ip = (cell_t *) (w + sizeof(cell_t)); NEXT;
|
||||||
|
}
|
||||||
Reference in New Issue
Block a user