3
** Copyright (C) 2005-2011 Mike Pall. See Copyright Notice in luajit.h
5
** This is a tool to build the hand-tuned assembler code required for
6
** LuaJIT's bytecode interpreter. It supports a variety of output formats
7
** to feed different toolchains (see usage() below).
9
** This tool is not particularly optimized because it's only used while
10
** _building_ LuaJIT. There's no point in distributing or installing it.
11
** Only the object code generated by this tool is linked into LuaJIT.
13
** Caveat: some memory is not free'd, error handling is lazy.
14
** It's a one-shot tool -- any effort fixing this would be wasted.
22
#include "lj_ircall.h"
24
#include "lj_dispatch.h"
36
/* ------------------------------------------------------------------------ */
38
/* DynASM glue definitions. */
40
#define Dst_DECL BuildCtx *ctx
41
#define Dst_REF (ctx->D)
44
#include "../dynasm/dasm_proto.h"
46
/* Glue macros for DynASM. */
47
static int collect_reloc(BuildCtx *ctx, uint8_t *addr, int idx, int type);
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#define DASM_EXTERN(ctx, addr, idx, type) \
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collect_reloc(ctx, addr, idx, type)
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/* ------------------------------------------------------------------------ */
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/* Avoid trouble if cross-compiling for an x86 target. Speed doesn't matter. */
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#define DASM_ALIGNED_WRITES 1
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/* Embed architecture-specific DynASM encoder and backend. */
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#include "../dynasm/dasm_x86.h"
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#include "buildvm_x86.h"
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#include "../dynasm/dasm_x86.h"
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#include "buildvm_x64win.h"
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#include "buildvm_x64.h"
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#include "../dynasm/dasm_arm.h"
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#include "buildvm_arm.h"
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#include "../dynasm/dasm_ppc.h"
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#include "buildvm_ppc.h"
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#elif LJ_TARGET_PPCSPE
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#include "../dynasm/dasm_ppc.h"
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#include "buildvm_ppcspe.h"
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#error "No support for this architecture (yet)"
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/* ------------------------------------------------------------------------ */
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void owrite(BuildCtx *ctx, const void *ptr, size_t sz)
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if (fwrite(ptr, 1, sz, ctx->fp) != sz) {
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fprintf(stderr, "Error: cannot write to output file: %s\n",
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/* ------------------------------------------------------------------------ */
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/* Emit code as raw bytes. Only used for DynASM debugging. */
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static void emit_raw(BuildCtx *ctx)
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owrite(ctx, ctx->code, ctx->codesz);
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/* -- Build machine code -------------------------------------------------- */
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static const char *sym_decorate(BuildCtx *ctx,
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const char *prefix, const char *suffix)
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const char *symprefix = ctx->mode == BUILD_machasm ? "_" : "";
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const char *symprefix = ctx->mode != BUILD_elfasm ? "_" : "";
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sprintf(name, "%s%s%s", symprefix, prefix, suffix);
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p = strchr(name, '@');
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if (!LJ_64 && (ctx->mode == BUILD_coffasm || ctx->mode == BUILD_peobj))
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p = (char *)malloc(strlen(name)+1); /* MSVC doesn't like strdup. */
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#define NRELOCSYM (sizeof(extnames)/sizeof(extnames[0])-1)
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static int relocmap[NRELOCSYM];
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/* Collect external relocations. */
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static int collect_reloc(BuildCtx *ctx, uint8_t *addr, int idx, int type)
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if (ctx->nreloc >= BUILD_MAX_RELOC) {
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fprintf(stderr, "Error: too many relocations, increase BUILD_MAX_RELOC.\n");
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if (relocmap[idx] < 0) {
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relocmap[idx] = ctx->nrelocsym;
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ctx->relocsym[ctx->nrelocsym] = sym_decorate(ctx, "", extnames[idx]);
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ctx->reloc[ctx->nreloc].ofs = (int32_t)(addr - ctx->code);
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ctx->reloc[ctx->nreloc].sym = relocmap[idx];
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ctx->reloc[ctx->nreloc].type = type;
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return 0; /* Encode symbol offset of 0. */
148
/* Naive insertion sort. Performance doesn't matter here. */
149
static void sym_insert(BuildCtx *ctx, int32_t ofs,
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const char *prefix, const char *suffix)
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ptrdiff_t i = ctx->nsym++;
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if (ctx->sym[i-1].ofs <= ofs)
156
ctx->sym[i] = ctx->sym[i-1];
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ctx->sym[i].ofs = ofs;
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ctx->sym[i].name = sym_decorate(ctx, prefix, suffix);
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/* Build the machine code. */
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static int build_code(BuildCtx *ctx)
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/* Initialize DynASM structures. */
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ctx->nglob = GLOB__MAX;
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ctx->glob = (void **)malloc(ctx->nglob*sizeof(void *));
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memset(ctx->glob, 0, ctx->nglob*sizeof(void *));
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ctx->globnames = globnames;
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ctx->relocsym = (const char **)malloc(NRELOCSYM*sizeof(const char *));
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for (i = 0; i < (int)NRELOCSYM; i++) relocmap[i] = -1;
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ctx->dasm_ident = DASM_IDENT;
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ctx->dasm_arch = DASM_ARCH;
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dasm_init(Dst, DASM_MAXSECTION);
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dasm_setupglobal(Dst, ctx->glob, ctx->nglob);
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dasm_setup(Dst, build_actionlist);
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/* Call arch-specific backend to emit the code. */
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ctx->npc = build_backend(ctx);
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/* Finalize the code. */
191
(void)dasm_checkstep(Dst, -1);
192
if ((status = dasm_link(Dst, &ctx->codesz))) return status;
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ctx->code = (uint8_t *)malloc(ctx->codesz);
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if ((status = dasm_encode(Dst, (void *)ctx->code))) return status;
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/* Allocate symbol table and bytecode offsets. */
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ctx->beginsym = sym_decorate(ctx, "", LABEL_PREFIX "vm_asm_begin");
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ctx->sym = (BuildSym *)malloc((ctx->npc+ctx->nglob+1)*sizeof(BuildSym));
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ctx->bc_ofs = (int32_t *)malloc(ctx->npc*sizeof(int32_t));
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/* Collect the opcodes (PC labels). */
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for (i = 0; i < ctx->npc; i++) {
204
int32_t ofs = dasm_getpclabel(Dst, i);
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if (ofs < 0) return 0x22000000|i;
206
ctx->bc_ofs[i] = ofs;
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!(i == BC_JFORI || i == BC_JFORL || i == BC_JITERL || i == BC_JLOOP ||
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i == BC_IFORL || i == BC_IITERL || i == BC_ILOOP)) &&
210
(LJ_HASFFI || i != BC_KCDATA))
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sym_insert(ctx, ofs, LABEL_PREFIX_BC, bc_names[i]);
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/* Collect the globals (named labels). */
215
for (i = 0; i < ctx->nglob; i++) {
216
const char *gl = globnames[i];
217
int len = (int)strlen(gl);
219
fprintf(stderr, "Error: undefined global %s\n", gl);
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/* Skip the _Z symbols. */
223
if (!(len >= 2 && gl[len-2] == '_' && gl[len-1] == 'Z'))
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sym_insert(ctx, (int32_t)((uint8_t *)(ctx->glob[i]) - ctx->code),
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LABEL_PREFIX, globnames[i]);
228
/* Close the address range. */
229
sym_insert(ctx, (int32_t)ctx->codesz, "", "");
237
/* -- Generate VM enums --------------------------------------------------- */
239
const char *const bc_names[] = {
240
#define BCNAME(name, ma, mb, mc, mt) #name,
246
const char *const ir_names[] = {
247
#define IRNAME(name, m, m1, m2) #name,
253
const char *const irt_names[] = {
254
#define IRTNAME(name) #name,
260
const char *const irfpm_names[] = {
261
#define FPMNAME(name) #name,
267
const char *const irfield_names[] = {
268
#define FLNAME(name, ofs) #name,
274
const char *const ircall_names[] = {
275
#define IRCALLNAME(cond, name, nargs, kind, type, flags) #name,
276
IRCALLDEF(IRCALLNAME)
281
static const char *const trace_errors[] = {
282
#define TREDEF(name, msg) msg,
283
#include "lj_traceerr.h"
287
static const char *lower(char *buf, const char *s)
291
*p++ = (*s >= 'A' && *s <= 'Z') ? *s+0x20 : *s;
298
/* Emit C source code for bytecode-related definitions. */
299
static void emit_bcdef(BuildCtx *ctx)
302
fprintf(ctx->fp, "/* This is a generated file. DO NOT EDIT! */\n\n");
303
fprintf(ctx->fp, "LJ_DATADEF const uint16_t lj_bc_ofs[] = {\n");
304
for (i = 0; i < ctx->npc; i++) {
306
fprintf(ctx->fp, ",\n");
307
fprintf(ctx->fp, "%d", ctx->bc_ofs[i]);
311
/* Emit VM definitions as Lua code for debug modules. */
312
static void emit_vmdef(BuildCtx *ctx)
316
fprintf(ctx->fp, "-- This is a generated file. DO NOT EDIT!\n\n");
317
fprintf(ctx->fp, "module(...)\n\n");
319
fprintf(ctx->fp, "bcnames = \"");
320
for (i = 0; bc_names[i]; i++) fprintf(ctx->fp, "%-6s", bc_names[i]);
321
fprintf(ctx->fp, "\"\n\n");
323
fprintf(ctx->fp, "irnames = \"");
324
for (i = 0; ir_names[i]; i++) fprintf(ctx->fp, "%-6s", ir_names[i]);
325
fprintf(ctx->fp, "\"\n\n");
327
fprintf(ctx->fp, "irfpm = { [0]=");
328
for (i = 0; irfpm_names[i]; i++)
329
fprintf(ctx->fp, "\"%s\", ", lower(buf, irfpm_names[i]));
330
fprintf(ctx->fp, "}\n\n");
332
fprintf(ctx->fp, "irfield = { [0]=");
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for (i = 0; irfield_names[i]; i++) {
335
lower(buf, irfield_names[i]);
336
p = strchr(buf, '_');
338
fprintf(ctx->fp, "\"%s\", ", buf);
340
fprintf(ctx->fp, "}\n\n");
342
fprintf(ctx->fp, "ircall = {\n[0]=");
343
for (i = 0; ircall_names[i]; i++)
344
fprintf(ctx->fp, "\"%s\",\n", ircall_names[i]);
345
fprintf(ctx->fp, "}\n\n");
347
fprintf(ctx->fp, "traceerr = {\n[0]=");
348
for (i = 0; trace_errors[i]; i++)
349
fprintf(ctx->fp, "\"%s\",\n", trace_errors[i]);
350
fprintf(ctx->fp, "}\n\n");
353
/* -- Argument parsing ---------------------------------------------------- */
355
/* Build mode names. */
356
static const char *const modenames[] = {
357
#define BUILDNAME(name) #name,
363
/* Print usage information and exit. */
364
static void usage(void)
367
fprintf(stderr, LUAJIT_VERSION " VM builder.\n");
368
fprintf(stderr, LUAJIT_COPYRIGHT ", " LUAJIT_URL "\n");
369
fprintf(stderr, "Target architecture: " LJ_ARCH_NAME "\n\n");
370
fprintf(stderr, "Usage: buildvm -m mode [-o outfile] [infiles...]\n\n");
371
fprintf(stderr, "Available modes:\n");
372
for (i = 0; i < BUILD__MAX; i++)
373
fprintf(stderr, " %s\n", modenames[i]);
377
/* Parse the output mode name. */
378
static BuildMode parsemode(const char *mode)
381
for (i = 0; modenames[i]; i++)
382
if (!strcmp(mode, modenames[i]))
385
return (BuildMode)-1;
388
/* Parse arguments. */
389
static void parseargs(BuildCtx *ctx, char **argv)
393
ctx->mode = (BuildMode)-1;
395
for (i = 1; (a = argv[i]) != NULL; i++) {
407
if (a[2] || argv[i] == NULL) goto err;
408
ctx->mode = parsemode(argv[i]);
412
if (a[2] || argv[i] == NULL) goto err;
413
ctx->outname = argv[i];
422
if (ctx->mode == (BuildMode)-1) goto err;
425
int main(int argc, char **argv)
428
BuildCtx *ctx = &ctx_;
431
if (sizeof(void *) != 4*LJ_32+8*LJ_64) {
432
fprintf(stderr,"Error: pointer size mismatch in cross-build.\n");
433
fprintf(stderr,"Try: make HOST_CC=\"gcc -m32\" CROSS=... TARGET=...\n\n");
438
parseargs(ctx, argv);
440
if ((status = build_code(ctx))) {
441
fprintf(stderr,"Error: DASM error %08x\n", status);
455
if (ctx->outname[0] == '-' && ctx->outname[1] == '\0') {
459
_setmode(_fileno(stdout), _O_BINARY); /* Yuck. */
461
} else if (!(ctx->fp = fopen(ctx->outname, binmode ? "wb" : "w"))) {
462
fprintf(stderr, "Error: cannot open output file '%s': %s\n",
463
ctx->outname, strerror(errno));
501
if (ferror(ctx->fp)) {
502
fprintf(stderr, "Error: cannot write to output file: %s\n",
added
removed
src/buildvm.c
