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- /*---
- ** $Id: lundump.c,v 2.44.1.1 2017/04/19 17:20:42 roberto Exp $
- ** load precompiled Lua chunks
- ** See Copyright Notice in lua.h
- */
- #define lundump_c
- #define LUA_CORE
- #include "lprefix.h"
- #include <string.h>
- #include "lua.h"
- #include "ldebug.h"
- #include "ldo.h"
- #include "lfunc.h"
- #include "llex.h"
- #include "lmem.h"
- #include "lnodemcu.h"
- #include "lobject.h"
- #include "lstring.h"
- #include "lundump.h"
- #include "lzio.h"
- /*
- ** Unlike the standard Lua version of lundump.c, this NodeMCU version must be
- ** able to store the dumped Protos into one of two targets:
- **
- ** (A) RAM-based heap. This in the same way as standard Lua, where the
- ** Proto data structures can be created by direct in memory addressing,
- ** with any references complying with Lua GC assumptions, so that all
- ** storage can be collected in the case of a thrown error.
- **
- ** (B) Flash programmable ROM memory. This can only be written to serially,
- ** using a write API, it can be subsequently but accessed and directly
- ** addressable through a memory-mapped address window after cache flush.
- **
- ** Mode (B) also know as LFS (Lua FLash Store) enables running Lua apps
- ** on small-memory IoT devices which support programmable flash storage such
- ** as the ESP8266 SoC. In the case of this chip, the usable RAM heap is
- ** roughly 45Kb, so the ability to store an extra 128Kb, say, of program into
- ** LFS can materially increase the size of application that can be executed
- ** and leave most of the heap for true R/W application data.
- **
- ** The changes to this source file enable the addition of LFS mode. In mode B,
- ** the resources aren't allocated in RAM but are written to Flash using the
- ** write API which returns the corresponding Flash read address is returned;
- ** also data can't be immediately read back using these addresses because of
- ** cache staleness.
- **
- ** Handling the Proto record has been reordered to avoid interleaved resource
- ** writes in mode (B), with the f->k being cached in RAM and the Proto
- ** hierarchies walked bottom-up in a way that still maintains GC compliance
- ** conformance for mode (A). This no-interleave constraint also complicates
- ** the writing of TString resources into flash, so the flashing process
- ** circumvents this issue for LFS loads by header by taking two passes to dump
- ** the hierarchy. The first dumps all strings that needed to load the Protos,
- ** with the subsequent Proto loads use an index to any TString references.
- ** This enables all strings to be loaded into an LFS-based ROstrt before
- ** starting to load the Protos.
- **
- ** Note that this module and ldump.c are compiled into both the ESP firmware
- ** and a host-based luac cross compiler. LFS dump is currently only supported
- ** in the compiler, but both the LFS and standard loads are supported in both
- ** the target (lua.c) and the host (luac.cross -e)environments. Both
- ** environments are built with the same integer and float formats (e.g. 32 bit,
- ** 32-bit IEEE).
- **
- ** Dumps can either be loaded into RAM or LFS depending on the load format. An
- ** extra complication is that luac.cross supports two LFS modes, with the
- ** first loading into an host process address space and using host 32 or 64
- ** bit address references. The second uses shadow ESP 32 bit addresses to
- ** create an absolute binary image for direct provisioning of ESP images.
- */
- #define MODE_RAM 0 /* Loading into RAM */
- #define MODE_LFS 1 /* Loading into a locally executable LFS */
- #define MODE_LFSA 2 /* (Host only) Loading into a shadow ESP image */
- typedef struct {
- lua_State *L; /* cache L to drop parameter list */
- ZIO *Z; /* ZIO context */
- const char *name; /* Filename of the LFS image being loaded */
- LFSHeader *fh; /* LFS flash header block */
- void *startLFS; /* Start address of LFS region */
- TString **TS; /* List of TStrings being used in the image */
- lu_int32 TSlen; /* Length of the same */
- lu_int32 TSndx; /* Index into the same */
- lu_int32 TSnFixed; /* Number of "fixed" TS */
- char *buff; /* Working buffer for assembling a TString */
- lu_int32 buffLen; /* Maximum length of TS used in the image */
- TString **list; /* TS list used to index the ROstrt */
- lu_int32 listLen; /* Length of the same */
- Proto **pv; /* List of Protos in LFS */
- lu_int32 pvLen; /* Length of the same */
- GCObject *protogc; /* LFS proto linked list */
- lu_byte useStrRefs; /* Flag if set then TStings are a index into TS */
- lu_byte mode; /* Either LFS or RAM */
- } LoadState;
- static l_noret error(LoadState *S, const char *why) {
- luaO_pushfstring(S->L, "%s: %s precompiled chunk", S->name, why);
- luaD_throw(S->L, LUA_ERRSYNTAX);
- }
- #define wordptr(p) cast(lu_int32 *, p)
- #define byteptr(p) cast(lu_byte *, p)
- #define wordoffset(p,q) (wordptr(p) - wordptr(q))
- #define FHaddr(S,t,f) cast(t, wordptr(S->startLFS) + (f))
- #define FHoffset(S,o) wordoffset((o), S->startLFS)
- #define NewVector(S, n, t) cast(t *,NewVector_(S, n, sizeof(t)))
- #define StoreGetPos(S) luaN_writeFlash((S)->Z->data, NULL, 0)
- static void *NewVector_(LoadState *S, int n, size_t s) {
- void *v;
- if (S->mode == MODE_RAM) {
- v = luaM_reallocv(S->L, NULL, 0, n, s);
- memset (v, 0, n*s);
- } else {
- v = StoreGetPos(S);
- }
- return v;
- }
- static void *Store_(LoadState *S, void *a, int ndx, const void *e, size_t s
- #ifdef LUA_USE_HOST
- , const char *format
- #endif
- ) {
- if (S->mode == MODE_RAM) {
- lu_byte *p = byteptr(a) + ndx*s;
- if (p != byteptr(e))
- memcpy(p, e, s);
- return p;
- }
- #ifdef LUA_USE_HOST
- else if (S->mode == MODE_LFSA && format) { /* do a repack move */
- void *p = StoreGetPos(S);
- const char *f = format;
- int o;
- for (o = 0; *f; o++, f++ ) {
- luaN_writeFlash(S->Z->data, wordptr(e)+o, sizeof(lu_int32));
- if (*f == 'A' || *f == 'W') /* Addr or word followed by alignment fill */
- o++;
- }
- lua_assert(o*sizeof(lu_int32) == s);
- return p;
- }
- #endif
- /* mode == LFS or 32bit build */
- return luaN_writeFlash(S->Z->data, e, s);
- }
- #ifdef LUA_USE_HOST
- #include <stdio.h>
- /* These compression maps must match the definitions in lobject.h etc. */
- # define OFFSET_TSTRING (2*(sizeof(lu_int32)-sizeof(size_t)))
- # define FMT_TSTRING "AwwA"
- #if defined(CONFIG_LUA_NUMBER_INT64) || defined(CONFIG_LUA_NUMBER_DOUBLE) || defined(LUA_NUMBER_64BITS)
- # define FMT_TVALUE "www"
- #else
- # define FMT_TVALUE "AW"
- #endif
- # define FMT_PROTO "AwwwwwwwwwwAAAAAAAA"
- # define FMT_UPVALUE "AW"
- # define FMT_LOCVAR "Aww"
- # define FMT_ROTENTRY "A" FMT_TVALUE
- # define FMT_ROTABLE "AWAA"
- # define StoreR(S,a, i, v, f) Store_(S, (a), i, &(v), sizeof(v), f)
- # define Store(S, a, i, v) StoreR(S, (a), i, v, NULL)
- # define StoreN(S, v, n) Store_(S, NULL, 0, (v), (n)*sizeof(*(v)), NULL)
- static void *StoreAV (LoadState *S, void *a, int n) {
- void **av = cast(void**, a);
- if (S->mode == MODE_LFSA) {
- void *p = StoreGetPos(S);
- int i; for (i = 0; i < n; i ++)
- luaN_writeFlash(S->Z->data, wordptr(av++), sizeof(lu_int32));
- return p;
- } else {
- return Store_(S, NULL, 0, av, n*sizeof(*av), NULL);
- }
- }
- #else // LUA_USE_ESP
- # define OFFSET_TSTRING (0)
- # define Store(S, a, i, v) Store_(S, (a), i, &(v), sizeof(v))
- # define StoreN(S, v, n) Store_(S, NULL, 0, (v), (n)*sizeof(*(v)))
- # define StoreR(S, a, i, v, f) Store(S, a, i, v)
- # define StoreAV(S, p, n) StoreN(S, p, n)
- # define OPT_FMT
- #endif
- #define StoreFlush(S) luaN_flushFlash((S)->Z->data);
- #define LoadVector(S,b,n) LoadBlock(S,b,(n)*sizeof((b)[0]))
- static void LoadBlock (LoadState *S, void *b, size_t size) {
- lu_int32 left = luaZ_read(S->Z, b, size);
- if ( left != 0)
- error(S, "truncated");
- }
- #define LoadVar(S,x) LoadVector(S,&x,1)
- static lu_byte LoadByte (LoadState *S) {
- lu_byte x;
- LoadVar(S, x);
- return x;
- }
- static lua_Integer LoadInt (LoadState *S) {
- lu_byte b;
- lua_Integer x = 0;
- do { b = LoadByte(S); x = (x<<7) + (b & 0x7f); } while (b & 0x80);
- return x;
- }
- static lua_Number LoadNumber (LoadState *S) {
- lua_Number x;
- LoadVar(S, x);
- return x;
- }
- static lua_Integer LoadInteger (LoadState *S, lu_byte tt_data) {
- lu_byte b;
- lua_Integer x = tt_data & LUAU_DMASK;
- if (tt_data & 0x80) {
- do { b = LoadByte(S); x = (x<<7) + (b & 0x7f); } while (b & 0x80);
- }
- return (tt_data & LUAU_TMASK) == LUAU_TNUMNINT ? -x-1 : x;
- }
- static TString *LoadString_ (LoadState *S, int prelen) {
- TString *ts;
- char buff[LUAI_MAXSHORTLEN];
- int n = LoadInteger(S, (prelen < 0 ? LoadByte(S) : prelen)) - 1;
- if (n < 0)
- return NULL;
- if (S->useStrRefs)
- ts = S->TS[n];
- else if (n <= LUAI_MAXSHORTLEN) { /* short string? */
- LoadVector(S, buff, n);
- ts = luaS_newlstr(S->L, buff, n);
- } else { /* long string */
- ts = luaS_createlngstrobj(S->L, n);
- LoadVector(S, getstr(ts), n); /* load directly in final place */
- }
- return ts;
- }
- #define LoadString(S) LoadString_(S,-1)
- #define LoadString2(S,pl) LoadString_(S,(pl))
- static void LoadCode (LoadState *S, Proto *f) {
- Instruction *p;
- f->sizecode = LoadInt(S);
- f->code = luaM_newvector(S->L, f->sizecode, Instruction);
- LoadVector(S, f->code, f->sizecode);
- if (S->mode != MODE_RAM) {
- p = StoreN(S, f->code, f->sizecode);
- luaM_freearray(S->L, f->code, f->sizecode);
- f->code = p;
- }
- }
- static void *LoadFunction(LoadState *S, Proto *f, TString *psource);
- static void LoadConstants (LoadState *S, Proto *f) {
- int i;
- f->sizek = LoadInt(S);
- f->k = NewVector(S, f->sizek, TValue);
- for (i = 0; i < f->sizek; i++) {
- TValue o;
- /*
- * tt is formatted 0bFTTTDDDD where TTT is the type; the F and the DDDD
- * fields are used by the integer decoder as this often saves a byte in
- * the endcoding.
- */
- lu_byte tt = LoadByte(S);
- switch (tt & LUAU_TMASK) {
- case LUAU_TNIL:
- setnilvalue(&o);
- break;
- case LUAU_TBOOLEAN:
- setbvalue(&o, !(tt == LUAU_TBOOLEAN));
- break;
- case LUAU_TNUMFLT:
- setfltvalue(&o, LoadNumber(S));
- break;
- case LUAU_TNUMPINT:
- case LUAU_TNUMNINT:
- setivalue(&o, LoadInteger(S, tt));
- break;
- case LUAU_TSSTRING:
- o.value_.gc = cast(GCObject *, LoadString2(S, tt));
- o.tt_ = ctb(LUA_TSHRSTR);
- break;
- case LUAU_TLSTRING:
- o.value_.gc = cast(GCObject *, LoadString2(S, tt));
- o.tt_ = ctb(LUA_TLNGSTR);
- break;
- default:
- lua_assert(0);
- }
- StoreR(S, f->k, i, o, FMT_TVALUE);
- }
- }
- /*
- ** The handling of Protos has support both modes, and in the case of flash
- ** mode, this requires some care as any writes to a Proto f must be deferred
- ** until after all of the writes to its sub Protos have been completed; so
- ** the Proto record and its p vector must be retained in RAM until stored to
- ** flash.
- **
- ** Recovery of dead resources on error handled by the Lua GC as standard in
- ** the case of RAM loading. In the case of loading an LFS image into flash,
- ** the error recovery could be done through the S->protogc list, but given
- ** that the immediate action is to restart the CPU, there is little point
- ** in adding the extra functionality to recover these dangling resources.
- */
- static void LoadProtos (LoadState *S, Proto *f) {
- int i, n = LoadInt(S);
- Proto **p = luaM_newvector(S->L, n, Proto *);
- f->p = p;
- f->sizep = n;
- memset (p, 0, n * sizeof(*p));
- for (i = 0; i < n; i++)
- p[i] = LoadFunction(S, luaF_newproto(S->L), f->source);
- if (S->mode != MODE_RAM) {
- f->p = StoreAV(S, cast(void **, p), n);
- luaM_freearray(S->L, p, n);
- }
- }
- static void LoadUpvalues (LoadState *S, Proto *f) {
- int i, nostripnames = LoadByte(S);
- f->sizeupvalues = LoadInt(S);
- if (f->sizeupvalues) {
- f->upvalues = NewVector(S, f->sizeupvalues, Upvaldesc);
- for (i = 0; i < f->sizeupvalues ; i++) {
- TString *name = nostripnames ? LoadString(S) : NULL;
- Upvaldesc uv = {name, LoadByte(S), LoadByte(S)};
- StoreR(S, f->upvalues, i, uv, FMT_UPVALUE);
- }
- }
- }
- static void LoadDebug (LoadState *S, Proto *f) {
- int i;
- f->sizelineinfo = LoadInt(S);
- if (f->sizelineinfo) {
- lu_byte *li = luaM_newvector(S->L, f->sizelineinfo, lu_byte);
- LoadVector(S, li, f->sizelineinfo);
- if (S->mode == MODE_RAM) {
- f->lineinfo = li;
- } else {
- f->lineinfo = StoreN(S, li, f->sizelineinfo);
- luaM_freearray(S->L, li, f->sizelineinfo);
- }
- }
- f->sizelocvars = LoadInt(S);
- f->locvars = NewVector(S, f->sizelocvars, LocVar);
- for (i = 0; i < f->sizelocvars; i++) {
- LocVar lv = {LoadString(S), LoadInt(S), LoadInt(S)};
- StoreR(S, f->locvars, i, lv, FMT_LOCVAR);
- }
- }
- static void *LoadFunction (LoadState *S, Proto *f, TString *psource) {
- /*
- * Main protos have f->source naming the file used to create the hierarchy;
- * subordinate protos set f->source != NULL to inherit this name from the
- * parent. In LFS mode, the Protos are moved from the GC to a local list
- * in S, but no error GC is attempted as discussed in LoadProtos.
- */
- Proto *p;
- global_State *g = G(S->L);
- if (S->mode != MODE_RAM) {
- lua_assert(g->allgc == obj2gco(f));
- g->allgc = f->next; /* remove object from 'allgc' list */
- f->next = S->protogc; /* push f into the head of the protogc list */
- S->protogc = obj2gco(f);
- }
- f->source = LoadString(S);
- if (f->source == NULL) /* no source in dump? */
- f->source = psource; /* reuse parent's source */
- f->linedefined = LoadInt(S);
- f->lastlinedefined = LoadInt(S);
- f->numparams = LoadByte(S);
- f->is_vararg = LoadByte(S);
- f->maxstacksize = LoadByte(S);
- LoadProtos(S, f);
- LoadCode(S, f);
- LoadConstants(S, f);
- LoadUpvalues(S, f);
- LoadDebug(S, f);
- if (S->mode != MODE_RAM) {
- GCObject *save = f->next;
- if (f->source != NULL) {
- setLFSbit(f);
- /* cache the RAM next and set up the next for the LFS proto chain */
- f->next = FHaddr(S, GCObject *, S->fh->protoHead);
- p = StoreR(S, NULL, 0, *f, FMT_PROTO);
- S->fh->protoHead = FHoffset(S, p);
- } else {
- p = StoreR(S, NULL, 0, *f, FMT_PROTO);
- }
- S->protogc = save; /* pop f from the head of the protogc list */
- luaM_free(S->L, f); /* and collect the dead resource */
- f = p;
- }
- return f;
- }
- static void checkliteral (LoadState *S, const char *s, const char *msg) {
- char buff[sizeof(LUA_SIGNATURE) + sizeof(LUAC_DATA)]; /* larger than both */
- size_t len = strlen(s);
- LoadVector(S, buff, len);
- if (memcmp(s, buff, len) != 0)
- error(S, msg);
- }
- static void fchecksize (LoadState *S, size_t size, const char *tname) {
- if (LoadByte(S) != size)
- error(S, luaO_pushfstring(S->L, "%s size mismatch in", tname));
- }
- #define checksize(S,t) fchecksize(S,sizeof(t),#t)
- static void checkHeader (LoadState *S, int format) {
- checkliteral(S, LUA_SIGNATURE + 1, "not a"); /* 1st char already checked */
- if (LoadByte(S) != LUAC_VERSION)
- error(S, "version mismatch in");
- if (LoadByte(S) != format)
- error(S, "format mismatch in");
- checkliteral(S, LUAC_DATA, "corrupted");
- checksize(S, int);
- /*
- * The standard Lua VM does a check on the sizeof size_t and endian check on
- * integer; both are dropped as the former prevents dump files being shared
- * across 32 and 64 bit machines, and we use multi-byte coding of ints.
- */
- checksize(S, Instruction);
- checksize(S, lua_Integer);
- checksize(S, lua_Number);
- LoadByte(S); /* skip number tt field */
- if (LoadNumber(S) != LUAC_NUM)
- error(S, "float format mismatch in");
- }
- /*
- ** Load precompiled chunk to support standard LUA_API load functions. The
- ** extra LFS functionality is effectively NO-OPed out on this MODE_RAM path.
- */
- LClosure *luaU_undump(lua_State *L, ZIO *Z, const char *name) {
- LoadState S = {0};
- LClosure *cl;
- if (*name == '@' || *name == '=')
- S.name = name + 1;
- else if (*name == LUA_SIGNATURE[0])
- S.name = "binary string";
- else
- S.name = name;
- S.L = L;
- S.Z = Z;
- S.mode = MODE_RAM;
- S.fh = NULL;
- S.useStrRefs = 0;
- checkHeader(&S, LUAC_FORMAT);
- cl = luaF_newLclosure(L, LoadByte(&S));
- setclLvalue(L, L->top, cl);
- luaD_inctop(L);
- cl->p = luaF_newproto(L);
- LoadFunction(&S, cl->p, NULL);
- lua_assert(cl->nupvalues == cl->p->sizeupvalues);
- return cl;
- }
- /*============================================================================**
- ** NodeMCU extensions for LFS support and Loading. Note that this funtionality
- ** is called from a hook in the lua startup within a lua_lock() (as with
- ** LuaU_undump), so luaU_undumpLFS() cannot use the external Lua API. It does
- ** uses the Lua stack, but staying within LUA_MINSTACK limits.
- **
- ** The in-RAM Protos used to assemble proto content prior to writing to LFS
- ** need special treatment since these hold LFS references rather than RAM ones
- ** and will cause the Lua GC to error if swept. Rather than adding complexity
- ** to lgc.c for this one-off process, these Protos are removed from the allgc
- ** list and fixed in a local one, and collected inline.
- **============================================================================*/
- /*
- ** Write a TString to the LFS. This parallels the lstring.c algo but writes
- ** directly to the LFS buffer and also append the LFS address in S->TS. Seeding
- ** is based on the seed defined in the LFS image, rather than g->seed.
- */
- static void addTS(LoadState *S, int l, int extra) {
- LFSHeader *fh = S->fh;
- TString *ts = cast(TString *, S->buff);
- char *s = getstr(ts);
- lua_assert (sizelstring(l) <= S->buffLen);
- s[l] = '\0';
- /* The collectable and LFS bits must be set; all others inc the whitebits clear */
- ts->marked = bitmask(LFSBIT) | BIT_ISCOLLECTABLE;
- ts->extra = extra;
- if (l <= LUAI_MAXSHORTLEN) { /* short string */
- TString **p;
- ts->tt = LUA_TSHRSTR;
- ts->shrlen = cast_byte(l);
- ts->hash = luaS_hash(s, l, fh->seed);
- p = S->list + lmod(ts->hash, S->listLen);
- ts->u.hnext = *p;
- ts->next = FHaddr(S, GCObject *, fh->shortTShead);
- S->TS[S->TSndx] = *p = StoreR(S, NULL, 0, *ts, FMT_TSTRING);
- fh->shortTShead = FHoffset(S, *p);
- } else { /* long string */
- TString *p;
- ts->tt = LUA_TLNGSTR;
- ts->shrlen = 0;
- ts->u.lnglen = l;
- ts->hash = fh->seed;
- luaS_hashlongstr(ts); /* sets hash and extra fields */
- ts->next = FHaddr(S, GCObject *, fh->longTShead);
- S->TS[S->TSndx] = p = StoreR(S, NULL, 0, *ts, FMT_TSTRING);
- fh->longTShead = FHoffset(S, p);
- }
- // printf("%04u(%u): %s\n", S->TSndx, l, S->buff + sizeof(union UTString));
- StoreN(S,S->buff + sizeof(union UTString), l+1);
- S->TSndx++;
- }
- /*
- ** The runtime (in ltm.c and llex.c) declares ~100 fixed strings and so these
- ** are moved into LFS to free up an extra ~2Kb RAM. Extra get token access
- ** functions have been added to these modules. These tokens aren't unique as
- ** ("nil" and "function" are both tokens and typenames), hardwiring this
- ** duplication debounce as a wrapper around addTS() is the simplest way of
- ** voiding the need for extra lookup resources.
- */
- static void addTSnodup(LoadState *S, const char *s, int extra) {
- int i, l = strlen(s);
- static struct {const char *k; int found; } t[] = {{"nil", 0},{"function", 0}};
- for (i = 0; i < sizeof(t)/sizeof(*t); i++) {
- if (!strcmp(t[i].k, s)) {
- if (t[i].found) return; /* ignore the duplicate copy */
- t[i].found = 1; /* flag that this constant is already loaded */
- break;
- }
- }
- memcpy(getstr(cast(TString *, S->buff)), s, l);
- addTS(S, l, extra);
- }
- /*
- ** Load TStrings in dump format. ALl TStrings used in an LFS image excepting
- ** any fixed strings are dumped as a unique collated set. Any strings in the
- ** following Proto streams use an index reference into this list rather than an
- ** inline copy. This function loads and stores them into LFS, constructing the
- ** ROstrt for the shorter interned strings.
- */
- static void LoadAllStrings (LoadState *S) {
- lua_State *L = S->L;
- global_State *g = G(L);
- int nb = sizelstring(LoadInt(S));
- int ns = LoadInt(S);
- int nl = LoadInt(S);
- int nstrings = LoadInt(S);
- int n = ns + nl;
- int nlist = 1<<luaO_ceillog2(ns);
- int i, extra;
- const char *p;
- /* allocate dynamic resources and save in S for error path collection */
- S->TS = luaM_newvector(L, n+1, TString *);
- S->TSlen = n+1;
- S->buff = luaM_newvector(L, nb, char);
- S->buffLen = nb;
- S->list = luaM_newvector(L, nlist, TString *);
- S->listLen = nlist;
- memset (S->list, 0, nlist*sizeof(TString *));
- /* add the strings in the image file to LFS */
- for (i = 1; i <= nstrings; i++) {
- int tt = LoadByte(S);
- lua_assert((tt&LUAU_TMASK)==LUAU_TSSTRING || (tt&LUAU_TMASK)==LUAU_TLSTRING);
- int l = LoadInteger(S, tt) - 1; /* No NULL entry in list of TSs */
- LoadVector(S, getstr(cast(TString *, S->buff)), l);
- addTS(S, l, 0);
- }
- /* add the fixed strings to LFS */
- for (i = 0; (p = luaX_getstr(i, &extra))!=NULL; i++) {
- addTSnodup(S, p, extra);
- }
- addTSnodup(S, getstr(g->memerrmsg), 0);
- addTSnodup(S, LUA_ENV, 0);
- for (i = 0; (p = luaT_getstr(i))!=NULL; i++) {
- addTSnodup(S, p, 0);
- }
- /* check that the actual size is the same as the predicted */
- lua_assert(n == S->TSndx-1);
- S->fh->oROhash = FHoffset(S, StoreAV(S, S->list, nlist));
- S->fh->nROuse = ns;
- S->fh->nROsize = nlist;
- StoreFlush(S);
- S->buff = luaM_freearray(L, S->buff, nb);
- S->buffLen = 0;
- S->list = luaM_freearray(L, S->list, nlist);
- S->listLen = 0;
- }
- static void LoadAllProtos (LoadState *S) {
- lua_State *L = S->L;
- ROTable_entry eol = {NULL, LRO_NILVAL};
- int i, n = LoadInt(S);
- S->pv = luaM_newvector(L, n, Proto *);
- S->pvLen = n;
- /* Load Protos and store addresses in the Proto vector */
- for (i = 0; i < n; i++) {
- S->pv[i] = LoadFunction(S, luaF_newproto(L), NULL);
- }
- /* generate the ROTable entries from first N constants; the last is a timestamp */
- int nk = LoadInt(S);
- lua_assert(n+1 == nk);
- ROTable_entry *entry_list = cast(ROTable_entry *, StoreGetPos(S));
- for (i = 0; i < nk - 1; i++) { // -1 to ignore timestamp
- lu_byte tt_data = LoadByte(S);
- TString *Tname = LoadString2(S, tt_data);
- const char *name = getstr(Tname) + OFFSET_TSTRING;
- lua_assert((tt_data & LUAU_TMASK) == LUAU_TSSTRING);
- ROTable_entry me = {name, LRO_LUDATA(S->pv[i])};
- StoreR(S, NULL, 0, me, FMT_ROTENTRY);
- }
- StoreR(S, NULL, 0, eol, FMT_ROTENTRY);
- /* terminate the ROTable entry list and store the ROTable header */
- ROTable ev = { (GCObject *)1, LUA_TTBLROF, LROT_MARKED,
- (lu_byte) ~0, n, NULL, entry_list};
- S->fh->protoROTable = FHoffset(S, StoreR(S, NULL, 0, ev, FMT_ROTABLE));
- /* last const is timestamp */
- S->fh->timestamp = LoadInteger(S, LoadByte(S));
- }
- static void undumpLFS(lua_State *L, void *ud) {
- LoadState *S = cast(LoadState *, ud);
- void *F = S->Z->data;
- S->startLFS = StoreGetPos(S);
- luaN_setFlash(F, sizeof(LFSHeader));
- S->fh->flash_sig = FLASH_SIG;
- if (LoadByte(S) != LUA_SIGNATURE[0])
- error(S, "invalid header in");
- checkHeader(S, LUAC_LFS_IMAGE_FORMAT);
- S->fh->seed = LoadInteger(S, LoadByte(S));
- checkliteral(S, LUA_STRING_SIG,"no string vector");
- LoadAllStrings (S);
- checkliteral(S, LUA_PROTO_SIG,"no Proto vector");
- LoadAllProtos(S);
- S->fh->flash_size = byteptr(StoreGetPos(S)) - byteptr(S->startLFS);
- luaN_setFlash(F, 0);
- StoreN(S, S->fh, 1);
- luaN_setFlash(F, 0);
- S->TS = luaM_freearray(L, S->TS, S->TSlen);
- }
- /*
- ** Load precompiled LFS image. This is called from a hook in the firmware
- ** startup if LFS reload is required.
- */
- LUAI_FUNC int luaU_undumpLFS(lua_State *L, ZIO *Z, int isabs) {
- LFSHeader fh = {0};
- LoadState S = {0};
- int status;
- S.L = L;
- S.Z = Z;
- S.mode = isabs && sizeof(size_t) != sizeof(lu_int32) ? MODE_LFSA : MODE_LFS;
- S.useStrRefs = 1;
- S.fh = &fh;
- L->nny++; /* do not yield during undump LFS */
- status = luaD_pcall(L, undumpLFS, &S, savestack(L, L->top), L->errfunc);
- luaM_freearray(L, S.TS, S.TSlen);
- luaM_freearray(L, S.buff, S.buffLen);
- luaM_freearray(L, S.list, S.listLen);
- luaM_freearray(L, S.pv, S.pvLen);
- L->nny--;
- return status;
- }
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