diff options
author | Taru Karttunen <taruti@taruti.net> | 2011-03-30 15:46:40 +0300 |
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committer | Taru Karttunen <taruti@taruti.net> | 2011-03-30 15:46:40 +0300 |
commit | e5888a1ffdae813d7575f5fb02275c6bb07e5199 (patch) | |
tree | d8d51eac403f07814b9e936eed0c9a79195e2450 /sys/src/cmd/ql/asm.c |
Import sources from 2011-03-30 iso image
Diffstat (limited to 'sys/src/cmd/ql/asm.c')
-rwxr-xr-x | sys/src/cmd/ql/asm.c | 845 |
1 files changed, 845 insertions, 0 deletions
diff --git a/sys/src/cmd/ql/asm.c b/sys/src/cmd/ql/asm.c new file mode 100755 index 000000000..8930ddae8 --- /dev/null +++ b/sys/src/cmd/ql/asm.c @@ -0,0 +1,845 @@ +#include "l.h" + +#define KMASK 0xF0000000 +#define JMPSZ sizeof(u32int) /* size of bootstrap jump section */ + +#define LPUT(c)\ + {\ + cbp[0] = (c)>>24;\ + cbp[1] = (c)>>16;\ + cbp[2] = (c)>>8;\ + cbp[3] = (c);\ + cbp += 4;\ + cbc -= 4;\ + if(cbc <= 0)\ + cflush();\ + } + +#define CPUT(c)\ + {\ + cbp[0] = (c);\ + cbp++;\ + cbc--;\ + if(cbc <= 0)\ + cflush();\ + } + +void strnput(char*, int); + +long +entryvalue(void) +{ + char *a; + Sym *s; + + a = INITENTRY; + if(*a >= '0' && *a <= '9') + return atolwhex(a); + s = lookup(a, 0); + if(s->type == 0) + return INITTEXT; + if(dlm && s->type == SDATA) + return s->value+INITDAT; + if(s->type != STEXT && s->type != SLEAF) + diag("entry not text: %s", s->name); + return s->value; +} + +void +asmb(void) +{ + Prog *p; + long t; + Optab *o; + long prevpc; + + if(debug['v']) + Bprint(&bso, "%5.2f asm\n", cputime()); + Bflush(&bso); + + /* emit text segment */ + seek(cout, HEADR, 0); + prevpc = pc = INITTEXT; + for(p = firstp; p != P; p = p->link) { + if(p->as == ATEXT) { + curtext = p; + autosize = p->to.offset + 4; + if(p->from3.type == D_CONST) { + for(; pc < p->pc; pc++) + CPUT(0); + } + } + if(p->pc != pc) { + diag("phase error %lux sb %lux", + p->pc, pc); + if(!debug['a']) + prasm(curp); + pc = p->pc; + } + curp = p; + o = oplook(p); /* could probably avoid this call */ + if(asmout(p, o, 0)) { + p = p->link; + pc += 4; + } + pc += o->size; + if (prevpc & (1<<31) && (pc & (1<<31)) == 0) { + char *tn; + + tn = "??none??"; + if(curtext != P && curtext->from.sym != S) + tn = curtext->from.sym->name; + Bprint(&bso, "%s: warning: text segment wrapped past 0\n", tn); + } + prevpc = pc; + } + /* for virtex 4, inject a jmp instruction after other text */ + if(HEADTYPE == 6) + /* branch to absolute entry address (0xfffe2100) */ + lput((18 << 26) | (0x03FFFFFC & entryvalue()) | 2); + + if(debug['a']) + Bprint(&bso, "\n"); + Bflush(&bso); + cflush(); + + /* emit data segment */ + curtext = P; + switch(HEADTYPE) { + case 6: + textsize += JMPSZ; + /* fall through */ + case 0: + case 1: + case 2: + case 5: + seek(cout, HEADR+textsize, 0); + break; + case 3: + seek(cout, rnd(HEADR+textsize, 4), 0); + break; + case 4: + seek(cout, rnd(HEADR+textsize, 4096), 0); + break; + } + + if(dlm){ + char buf[8]; + + write(cout, buf, INITDAT-textsize); + textsize = INITDAT; + } + + for(t = 0; t < datsize; t += sizeof(buf)-100) { + if(datsize-t > sizeof(buf)-100) + datblk(t, sizeof(buf)-100); + else + datblk(t, datsize-t); + } + + symsize = 0; + lcsize = 0; + if(!debug['s']) { + if(debug['v']) + Bprint(&bso, "%5.2f sym\n", cputime()); + Bflush(&bso); + switch(HEADTYPE) { + case 0: + case 1: + case 2: + case 5: + case 6: + seek(cout, HEADR+textsize+datsize, 0); + break; + case 3: + seek(cout, rnd(HEADR+textsize, 4)+datsize, 0); + break; + case 4: + seek(cout, rnd(HEADR+textsize, 4096)+datsize, 0); + break; + } + if(!debug['s']) + asmsym(); + if(debug['v']) + Bprint(&bso, "%5.2f sp\n", cputime()); + Bflush(&bso); + if(!debug['s']) + asmlc(); + if(dlm) + asmdyn(); + if(HEADTYPE == 0 || HEADTYPE == 1) /* round up file length for boot image */ + if((symsize+lcsize) & 1) + CPUT(0); + cflush(); + } + else if(dlm){ + asmdyn(); + cflush(); + } + + /* back up and write the header */ + seek(cout, 0L, 0); + switch(HEADTYPE) { + case 0: + lput(0x1030107); /* magic and sections */ + lput(textsize); /* sizes */ + lput(datsize); + lput(bsssize); + lput(symsize); /* nsyms */ + lput(entryvalue()); /* va of entry */ + lput(0L); + lput(lcsize); + break; + case 1: + lput(0x4a6f7921); /* Joy! */ + lput(0x70656666); /* peff */ + lput(0x70777063); /* pwpc */ + lput(1); + lput(0); + lput(0); + lput(0); + lput(0); + lput(0x30002); /*YY*/ + lput(0); + lput(~0); + lput(0); + lput(textsize+datsize); + lput(textsize+datsize); + lput(textsize+datsize); + lput(0xd0); /* header size */ + lput(0x10400); + lput(~0); + lput(0); + lput(0xc); + lput(0xc); + lput(0xc); + lput(0xc0); + lput(0x01010400); + lput(~0); + lput(0); + lput(0x38); + lput(0x38); + lput(0x38); + lput(0x80); + lput(0x04040400); + lput(0); + lput(1); + lput(0); + lput(~0); + lput(0); + lput(~0); + lput(0); + lput(0); + lput(0); + lput(0); + lput(0); + lput(0); + lput(0); + lput(0); + lput(0); + lput(0); + lput(0); + lput(0x3100); /* load address */ + lput(0); + lput(0); + lput(0); /* whew! */ + break; + case 2: + if(dlm) + lput(0x80000000 | (4*21*21+7)); /* magic */ + else + lput(4*21*21+7); /* magic */ + lput(textsize); /* sizes */ + lput(datsize); + lput(bsssize); + lput(symsize); /* nsyms */ + lput(entryvalue()); /* va of entry */ + lput(0L); + lput(lcsize); + break; + case 3: + break; + case 4: + lput((0x1DFL<<16)|3L); /* magic and sections */ + lput(time(0)); /* time and date */ + lput(rnd(HEADR+textsize, 4096)+datsize); + lput(symsize); /* nsyms */ + lput((0x48L<<16)|15L); /* size of optional hdr and flags */ + + lput((0413<<16)|01L); /* magic and version */ + lput(textsize); /* sizes */ + lput(datsize); + lput(bsssize); + lput(entryvalue()); /* va of entry */ + lput(INITTEXT); /* va of base of text */ + lput(INITDAT); /* va of base of data */ + lput(INITDAT); /* address of TOC */ + lput((1L<<16)|1); /* sn(entry) | sn(text) */ + lput((2L<<16)|1); /* sn(data) | sn(toc) */ + lput((0L<<16)|3); /* sn(loader) | sn(bss) */ + lput((3L<<16)|3); /* maxalign(text) | maxalign(data) */ + lput(('1'<<24)|('L'<<16)|0); /* type field, and reserved */ + lput(0); /* max stack allowed */ + lput(0); /* max data allowed */ + lput(0); lput(0); lput(0); /* reserved */ + + strnput(".text", 8); /* text segment */ + lput(INITTEXT); /* address */ + lput(INITTEXT); + lput(textsize); + lput(HEADR); + lput(0L); + lput(HEADR+textsize+datsize+symsize); + lput(lcsize); /* line number size */ + lput(0x20L); /* flags */ + + strnput(".data", 8); /* data segment */ + lput(INITDAT); /* address */ + lput(INITDAT); + lput(datsize); + lput(rnd(HEADR+textsize, 4096));/* sizes */ + lput(0L); + lput(0L); + lput(0L); + lput(0x40L); /* flags */ + + strnput(".bss", 8); /* bss segment */ + lput(INITDAT+datsize); /* address */ + lput(INITDAT+datsize); + lput(bsssize); + lput(0L); + lput(0L); + lput(0L); + lput(0L); + lput(0x80L); /* flags */ + break; + case 5: + /* + * customised for blue/gene, + * notably the alignment and KMASK masking. + */ + strnput("\177ELF", 4); /* e_ident */ + CPUT(1); /* class = 32 bit */ + CPUT(2); /* data = MSB */ + CPUT(1); /* version = CURRENT */ + strnput("", 9); + lput((2L<<16)|20L); /* type = EXEC; machine = PowerPC */ + lput(1L); /* version = CURRENT */ + lput(entryvalue() & ~KMASK); /* entry vaddr */ + lput(52L); /* offset to first phdr */ + + if(debug['S']){ + lput(HEADR+textsize+datsize+symsize); /* offset to first shdr */ + lput(0L); /* flags = PPC */ + lput((52L<<16)|32L); /* Ehdr & Phdr sizes*/ + lput((3L<<16)|40L); /* # Phdrs & Shdr size */ + lput((3L<<16)|2L); /* # Shdrs & shdr string size */ + } + else{ + lput(0L); + lput(0L); /* flags = PPC */ + lput((52L<<16)|32L); /* Ehdr & Phdr sizes*/ + lput((3L<<16)|0L); /* # Phdrs & Shdr size */ + lput((3L<<16)|0L); /* # Shdrs & shdr string size */ + } + + lput(1L); /* text - type = PT_LOAD */ + lput(HEADR); /* file offset */ + lput(INITTEXT & ~KMASK); /* vaddr */ + lput(INITTEXT); /* paddr */ + lput(textsize); /* file size */ + lput(textsize); /* memory size */ + lput(0x05L); /* protections = RX */ + lput(0x10000L); /* alignment */ + + lput(1L); /* data - type = PT_LOAD */ + lput(HEADR+textsize); /* file offset */ + lput(INITDAT & ~KMASK); /* vaddr */ + lput(INITDAT); /* paddr */ + lput(datsize); /* file size */ + lput(datsize); /* memory size */ + lput(0x07L); /* protections = RWX */ + lput(0x10000L); /* alignment */ + + lput(0L); /* data - type = PT_NULL */ + lput(HEADR+textsize+datsize); /* file offset */ + lput(0L); /* vaddr */ + lput(0L); /* paddr */ + lput(symsize); /* symbol table size */ + lput(lcsize); /* line number size */ + lput(0x04L); /* protections = R */ + lput(0x04L); /* alignment code?? */ + cflush(); + + if(!debug['S']) + break; + + seek(cout, HEADR+textsize+datsize+symsize, 0); + lput(1); /* Section name (string tbl index) */ + lput(1); /* Section type */ + lput(2|4); /* Section flags */ + lput(INITTEXT & ~KMASK); /* Section virtual addr at execution */ + lput(HEADR); /* Section file offset */ + lput(textsize); /* Section size in bytes */ + lput(0); /* Link to another section */ + lput(0); /* Additional section information */ + lput(0x10000L); /* Section alignment */ + lput(0); /* Entry size if section holds table */ + + lput(7); /* Section name (string tbl index) */ + lput(1); /* Section type */ + lput(2|1); /* Section flags */ + lput(INITDAT & ~KMASK); /* Section virtual addr at execution */ + lput(HEADR+textsize); /* Section file offset */ + lput(datsize); /* Section size in bytes */ + lput(0); /* Link to another section */ + lput(0); /* Additional section information */ + lput(0x10000L); /* Section alignment */ + lput(0); /* Entry size if section holds table */ + + /* string section header */ + lput(12); /* Section name (string tbl index) */ + lput(3); /* Section type */ + lput(1 << 5); /* Section flags */ + lput(0); /* Section virtual addr at execution */ + lput(HEADR+textsize+datsize+symsize+3*40); /* Section file offset */ + lput(14); /* Section size in bytes */ + lput(0); /* Link to another section */ + lput(0); /* Additional section information */ + lput(1); /* Section alignment */ + lput(0); /* Entry size if section holds table */ + + /* string table */ + cput(0); + strnput(".text", 5); + cput(0); + strnput(".data", 5); + cput(0); + strnput(".strtab", 7); + cput(0); + cput(0); + + break; + case 6: + /* + * customised for virtex 4 boot, + * notably the alignment and KMASK masking. + */ + strnput("\177ELF", 4); /* e_ident */ + CPUT(1); /* class = 32 bit */ + CPUT(2); /* data = MSB */ + CPUT(1); /* version = CURRENT */ + strnput("", 9); + lput((2L<<16)|20L); /* type = EXEC; machine = PowerPC */ + lput(1L); /* version = CURRENT */ + lput(entryvalue()); /* entry vaddr */ + lput(52L); /* offset to first phdr */ + + debug['S'] = 1; /* no symbol table */ + if(debug['S']){ + lput(HEADR+textsize+datsize+symsize); /* offset to first shdr */ + lput(0L); /* flags = PPC */ + lput((52L<<16)|32L); /* Ehdr & Phdr sizes*/ + lput((4L<<16)|40L); /* # Phdrs & Shdr size */ + lput((4L<<16)|2L); /* # Shdrs & shdr string size */ + } + else{ + lput(0L); + lput(0L); /* flags = PPC */ + lput((52L<<16)|32L); /* Ehdr & Phdr sizes*/ + lput((4L<<16)|0L); /* # Phdrs & Shdr size */ + lput((4L<<16)|0L); /* # Shdrs & shdr string size */ + } + + lput(1L); /* text - type = PT_LOAD */ + lput(HEADR); /* file offset */ + lput(INITTEXT); /* vaddr */ + lput(INITTEXT); /* paddr */ + lput(textsize-JMPSZ); /* file size */ + lput(textsize-JMPSZ); /* memory size */ + lput(0x05L); /* protections = RX */ + lput(0); /* alignment */ + + lput(1L); /* data - type = PT_LOAD */ + lput(HEADR+textsize); /* file offset */ + lput(INITDAT); /* vaddr */ + lput(INITDAT); /* paddr */ + lput(datsize); /* file size */ + lput(datsize+bsssize); /* memory size */ + lput(0x07L); /* protections = RWX */ + lput(0); /* alignment */ + + lput(0L); /* data - type = PT_NULL */ + lput(HEADR+textsize+datsize); /* file offset */ + lput(0L); /* vaddr */ + lput(0L); /* paddr */ + lput(symsize); /* symbol table size */ + lput(lcsize); /* line number size */ + lput(0x04L); /* protections = R */ + lput(0x04L); /* alignment code?? */ + + /* add tiny text section at end with jmp to start */ + lput(1L); /* text - type = PT_LOAD */ + lput(HEADR+textsize-JMPSZ); /* file offset */ + lput(0xFFFFFFFC); /* vaddr */ + lput(0xFFFFFFFC); /* paddr */ + lput(JMPSZ); /* file size */ + lput(JMPSZ); /* memory size */ + lput(0x05L); /* protections = RX */ + lput(0); /* disable alignment */ + + cflush(); + break; + } + cflush(); +} + +void +strnput(char *s, int n) +{ + for(; *s; s++){ + CPUT(*s); + n--; + } + for(; n > 0; n--) + CPUT(0); +} + +void +cput(long l) +{ + CPUT(l); +} + +void +wput(long l) +{ + cbp[0] = l>>8; + cbp[1] = l; + cbp += 2; + cbc -= 2; + if(cbc <= 0) + cflush(); +} + +void +lput(long l) +{ + + LPUT(l); +} + +void +cflush(void) +{ + int n; + + n = sizeof(buf.cbuf) - cbc; + if(n) + write(cout, buf.cbuf, n); + cbp = buf.cbuf; + cbc = sizeof(buf.cbuf); +} + +void +asmsym(void) +{ + Prog *p; + Auto *a; + Sym *s; + int h; + + s = lookup("etext", 0); + if(s->type == STEXT) + putsymb(s->name, 'T', s->value, s->version); + + for(h=0; h<NHASH; h++) + for(s=hash[h]; s!=S; s=s->link) + switch(s->type) { + case SCONST: + putsymb(s->name, 'D', s->value, s->version); + continue; + + case SDATA: + putsymb(s->name, 'D', s->value+INITDAT, s->version); + continue; + + case SBSS: + putsymb(s->name, 'B', s->value+INITDAT, s->version); + continue; + + case SFILE: + putsymb(s->name, 'f', s->value, s->version); + continue; + } + + for(p=textp; p!=P; p=p->cond) { + s = p->from.sym; + if(s->type != STEXT && s->type != SLEAF) + continue; + + /* filenames first */ + for(a=p->to.autom; a; a=a->link) + if(a->type == D_FILE) + putsymb(a->sym->name, 'z', a->aoffset, 0); + else + if(a->type == D_FILE1) + putsymb(a->sym->name, 'Z', a->aoffset, 0); + + if(s->type == STEXT) + putsymb(s->name, 'T', s->value, s->version); + else + putsymb(s->name, 'L', s->value, s->version); + + /* frame, auto and param after */ + putsymb(".frame", 'm', p->to.offset+4, 0); + for(a=p->to.autom; a; a=a->link) + if(a->type == D_AUTO) + putsymb(a->sym->name, 'a', -a->aoffset, 0); + else + if(a->type == D_PARAM) + putsymb(a->sym->name, 'p', a->aoffset, 0); + } + if(debug['v'] || debug['n']) + Bprint(&bso, "symsize = %lud\n", symsize); + Bflush(&bso); +} + +void +putsymb(char *s, int t, long v, int ver) +{ + int i, f; + + if(t == 'f') + s++; + LPUT(v); + if(ver) + t += 'a' - 'A'; + CPUT(t+0x80); /* 0x80 is variable length */ + + if(t == 'Z' || t == 'z') { + CPUT(s[0]); + for(i=1; s[i] != 0 || s[i+1] != 0; i += 2) { + CPUT(s[i]); + CPUT(s[i+1]); + } + CPUT(0); + CPUT(0); + i++; + } + else { + for(i=0; s[i]; i++) + CPUT(s[i]); + CPUT(0); + } + symsize += 4 + 1 + i + 1; + + if(debug['n']) { + if(t == 'z' || t == 'Z') { + Bprint(&bso, "%c %.8lux ", t, v); + for(i=1; s[i] != 0 || s[i+1] != 0; i+=2) { + f = ((s[i]&0xff) << 8) | (s[i+1]&0xff); + Bprint(&bso, "/%x", f); + } + Bprint(&bso, "\n"); + return; + } + if(ver) + Bprint(&bso, "%c %.8lux %s<%d>\n", t, v, s, ver); + else + Bprint(&bso, "%c %.8lux %s\n", t, v, s); + } +} + +#define MINLC 4 +void +asmlc(void) +{ + long oldpc, oldlc; + Prog *p; + long v, s; + + oldpc = INITTEXT; + oldlc = 0; + for(p = firstp; p != P; p = p->link) { + if(p->line == oldlc || p->as == ATEXT || p->as == ANOP) { + if(p->as == ATEXT) + curtext = p; + if(debug['L']) + Bprint(&bso, "%6lux %P\n", + p->pc, p); + continue; + } + if(debug['L']) + Bprint(&bso, "\t\t%6ld", lcsize); + v = (p->pc - oldpc) / MINLC; + while(v) { + s = 127; + if(v < 127) + s = v; + CPUT(s+128); /* 129-255 +pc */ + if(debug['L']) + Bprint(&bso, " pc+%ld*%d(%ld)", s, MINLC, s+128); + v -= s; + lcsize++; + } + s = p->line - oldlc; + oldlc = p->line; + oldpc = p->pc + MINLC; + if(s > 64 || s < -64) { + CPUT(0); /* 0 vv +lc */ + CPUT(s>>24); + CPUT(s>>16); + CPUT(s>>8); + CPUT(s); + if(debug['L']) { + if(s > 0) + Bprint(&bso, " lc+%ld(%d,%ld)\n", + s, 0, s); + else + Bprint(&bso, " lc%ld(%d,%ld)\n", + s, 0, s); + Bprint(&bso, "%6lux %P\n", + p->pc, p); + } + lcsize += 5; + continue; + } + if(s > 0) { + CPUT(0+s); /* 1-64 +lc */ + if(debug['L']) { + Bprint(&bso, " lc+%ld(%ld)\n", s, 0+s); + Bprint(&bso, "%6lux %P\n", + p->pc, p); + } + } else { + CPUT(64-s); /* 65-128 -lc */ + if(debug['L']) { + Bprint(&bso, " lc%ld(%ld)\n", s, 64-s); + Bprint(&bso, "%6lux %P\n", + p->pc, p); + } + } + lcsize++; + } + while(lcsize & 1) { + s = 129; + CPUT(s); + lcsize++; + } + if(debug['v'] || debug['L']) + Bprint(&bso, "lcsize = %ld\n", lcsize); + Bflush(&bso); +} + +void +datblk(long s, long n) +{ + Prog *p; + char *cast; + long l, fl, j, d; + int i, c; + + memset(buf.dbuf, 0, n+100); + for(p = datap; p != P; p = p->link) { + curp = p; + l = p->from.sym->value + p->from.offset - s; + c = p->reg; + i = 0; + if(l < 0) { + if(l+c <= 0) + continue; + while(l < 0) { + l++; + i++; + } + } + if(l >= n) + continue; + if(p->as != AINIT && p->as != ADYNT) { + for(j=l+(c-i)-1; j>=l; j--) + if(buf.dbuf[j]) { + print("%P\n", p); + diag("multiple initialization"); + break; + } + } + switch(p->to.type) { + default: + diag("unknown mode in initialization\n%P", p); + break; + + case D_FCONST: + switch(c) { + default: + case 4: + fl = ieeedtof(&p->to.ieee); + cast = (char*)&fl; + for(; i<c; i++) { + buf.dbuf[l] = cast[fnuxi8[i+4]]; + l++; + } + break; + case 8: + cast = (char*)&p->to.ieee; + for(; i<c; i++) { + buf.dbuf[l] = cast[fnuxi8[i]]; + l++; + } + break; + } + break; + + case D_SCONST: + for(; i<c; i++) { + buf.dbuf[l] = p->to.sval[i]; + l++; + } + break; + + case D_CONST: + d = p->to.offset; + if(p->to.sym) { + if(p->to.sym->type == SUNDEF){ + ckoff(p->to.sym, d); + d += p->to.sym->value; + } + if(p->to.sym->type == STEXT || + p->to.sym->type == SLEAF) + d += p->to.sym->value; + if(p->to.sym->type == SDATA) + d += p->to.sym->value + INITDAT; + if(p->to.sym->type == SBSS) + d += p->to.sym->value + INITDAT; + if(dlm) + dynreloc(p->to.sym, l+s+INITDAT, 1, 0, 0); + } + cast = (char*)&d; + switch(c) { + default: + diag("bad nuxi %d %d\n%P", c, i, curp); + break; + case 1: + for(; i<c; i++) { + buf.dbuf[l] = cast[inuxi1[i]]; + l++; + } + break; + case 2: + for(; i<c; i++) { + buf.dbuf[l] = cast[inuxi2[i]]; + l++; + } + break; + case 4: + for(; i<c; i++) { + buf.dbuf[l] = cast[inuxi4[i]]; + l++; + } + break; + } + break; + } + } + write(cout, buf.dbuf, n); +} |