From 6d0d0d2736e65ec6afa89682f653737380ca4bfe Mon Sep 17 00:00:00 2001 From: Keith Kanios Date: Wed, 8 Jul 2009 23:04:52 -0500 Subject: [PATCH] macho64: Manually merge macho64 branch with master branch. --- Makefile.in | 17 +- output/outform.h | 31 +- output/outmacho.mac | 2 +- output/{outmacho.c => outmacho32.c} | 36 +- output/outmacho64.c | 1533 +++++++++++++++++++++++++++++++++++ 5 files changed, 1594 insertions(+), 25 deletions(-) rename output/{outmacho.c => outmacho32.c} (98%) create mode 100644 output/outmacho64.c diff --git a/Makefile.in b/Makefile.in index 92f9192..5bb73b2 100644 --- a/Makefile.in +++ b/Makefile.in @@ -67,10 +67,10 @@ NASM = nasm.$(O) nasmlib.$(O) ver.$(O) \ output/outbin.$(O) output/outaout.$(O) output/outcoff.$(O) \ output/outelf.$(O) output/outelf32.$(O) output/outelf64.$(O) \ output/outobj.$(O) output/outas86.$(O) output/outrdf2.$(O) \ - output/outdbg.$(O) output/outieee.$(O) output/outmacho.$(O) \ - preproc.$(O) quote.$(O) pptok.$(O) macros.$(O) \ - listing.$(O) eval.$(O) exprlib.$(O) stdscan.$(O) strfunc.$(O) \ - tokhash.$(O) regvals.$(O) regflags.$(O) + output/outdbg.$(O) output/outieee.$(O) output/outmacho32.$(O) \ + output/outmacho64.$(O) preproc.$(O) quote.$(O) pptok.$(O) \ + macros.$(O) listing.$(O) eval.$(O) exprlib.$(O) stdscan.$(O) \ + strfunc.$(O) tokhash.$(O) regvals.$(O) regflags.$(O) NDISASM = ndisasm.$(O) disasm.$(O) sync.$(O) nasmlib.$(O) ver.$(O) \ insnsd.$(O) insnsb.$(O) insnsn.$(O) regs.$(O) regdis.$(O) @@ -312,9 +312,12 @@ output/outieee.$(O): output/outieee.c compiler.h config.h insnsi.h nasm.h \ nasmlib.h output/outform.h output/outlib.h pptok.h preproc.h regs.h output/outlib.$(O): output/outlib.c compiler.h config.h insnsi.h nasm.h \ nasmlib.h output/outlib.h pptok.h preproc.h regs.h -output/outmacho.$(O): output/outmacho.c compiler.h config.h insnsi.h nasm.h \ - nasmlib.h output/outform.h output/outlib.h pptok.h preproc.h raa.h regs.h \ - saa.h +output/outmacho32.$(O): output/outmacho32.c compiler.h config.h insnsi.h \ + nasm.h nasmlib.h output/outform.h output/outlib.h pptok.h preproc.h raa.h \ + regs.h saa.h +output/outmacho64.$(O): output/outmacho64.c compiler.h config.h insnsi.h \ + nasm.h nasmlib.h output/outform.h output/outlib.h pptok.h preproc.h raa.h \ + regs.h saa.h output/outobj.$(O): output/outobj.c compiler.h config.h insnsi.h nasm.h \ nasmlib.h output/outform.h output/outlib.h pptok.h preproc.h regs.h \ stdscan.h diff --git a/output/outform.h b/output/outform.h index e96a4b9..3dfbc9c 100644 --- a/output/outform.h +++ b/output/outform.h @@ -133,8 +133,11 @@ #ifndef OF_IEEE #define OF_IEEE #endif -#ifndef OF_MACHO -#define OF_MACHO +#ifndef OF_MACHO32 +#define OF_MACHO32 +#endif +#ifndef OF_MACHO64 +#define OF_MACHO64 #endif #ifndef OF_DBG #define OF_DBG @@ -191,8 +194,11 @@ #ifndef OF_IEEE #define OF_IEEE #endif -#ifndef OF_MACHO -#define OF_MACHO +#ifndef OF_MACHO32 +#define OF_MACHO32 +#endif +#ifndef OF_MACHO64 +#define OF_MACHO64 #endif #endif @@ -233,8 +239,11 @@ #ifdef OF_NO_IEEE #undef OF_IEEE #endif -#ifdef OF_NO_MACHO -#undef OF_MACHO +#ifdef OF_NO_MACHO32 +#undef OF_MACHO32 +#endif +#ifdef OF_NO_MACHO64 +#undef OF_MACHO64 #endif #ifdef OF_NO_DBG #undef OF_DBG @@ -264,7 +273,9 @@ extern struct ofmt of_win32; extern struct ofmt of_win64; extern struct ofmt of_rdf2; extern struct ofmt of_ieee; +extern struct ofmt of_macho32; extern struct ofmt of_macho; +extern struct ofmt of_macho64; extern struct ofmt of_dbg; struct ofmt *drivers[] = { @@ -307,8 +318,12 @@ struct ofmt *drivers[] = { #ifdef OF_IEEE &of_ieee, #endif -#ifdef OF_MACHO - &of_macho, +#ifdef OF_MACHO32 + &of_macho32, + &of_macho, +#endif +#ifdef OF_MACHO64 + &of_macho64, #endif #ifdef OF_DBG &of_dbg, diff --git a/output/outmacho.mac b/output/outmacho.mac index f86c308..f1cdf18 100644 --- a/output/outmacho.mac +++ b/output/outmacho.mac @@ -31,7 +31,7 @@ ;; ;; -------------------------------------------------------------------------- -OUT: macho +OUT: macho macho32 macho64 %define __SECT__ [section .text] %macro __NASM_CDecl__ 1 %endmacro diff --git a/output/outmacho.c b/output/outmacho32.c similarity index 98% rename from output/outmacho.c rename to output/outmacho32.c index 7e2f0fb..c9e4365 100644 --- a/output/outmacho.c +++ b/output/outmacho32.c @@ -54,7 +54,7 @@ #include "output/outform.h" #include "output/outlib.h" -#if defined(OF_MACHO) +#if defined(OF_MACHO32) /* Mach-O in-file header structure sizes */ #define MACHO_HEADER_SIZE (28) @@ -1020,13 +1020,13 @@ static void macho_write_section (void) of the rest of the address. */ if (!r->ext) { /* generate final address by section address and offset */ - for (s2 = sects, fi = 1; - s2 != NULL; s2 = s2->next, fi++){ - if(fi == r->snum){ - l += s2->addr; - break; - } - } + for (s2 = sects, fi = 1; + s2 != NULL; s2 = s2->next, fi++) { + if (fi == r->snum) { + l += s2->addr; + break; + } + } } /* write new offset back */ @@ -1335,8 +1335,26 @@ static void debug_section_relocs (struct section *s) } } +struct ofmt of_macho32 = { + "NeXTstep/OpenStep/Rhapsody/Darwin/MacOS X (i386) object files", + "macho32", + 0, + null_debug_arr, + &null_debug_form, + macho_stdmac, + macho_init, + macho_setinfo, + macho_output, + macho_symdef, + macho_section, + macho_segbase, + macho_directive, + macho_filename, + macho_cleanup +}; + struct ofmt of_macho = { - "NeXTstep/OpenStep/Rhapsody/Darwin/MacOS X object files", + "MACHO (short name for MACHO32)", "macho", 0, null_debug_arr, diff --git a/output/outmacho64.c b/output/outmacho64.c new file mode 100644 index 0000000..cad399d --- /dev/null +++ b/output/outmacho64.c @@ -0,0 +1,1533 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 1996-2009 The NASM Authors - All Rights Reserved + * See the file AUTHORS included with the NASM distribution for + * the specific copyright holders. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following + * conditions are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND + * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * ----------------------------------------------------------------------- */ + +/* + * outmacho64.c output routines for the Netwide Assembler to produce + * NeXTstep/OpenStep/Rhapsody/Darwin/MacOS X (x86_64) object files + */ + +/* Most of this file is, like Mach-O itself, based on a.out. For more + * guidelines see outaout.c. */ + +#include "compiler.h" + +#include +#include +#include +#include +#include + +#include "nasm.h" +#include "nasmlib.h" +#include "saa.h" +#include "raa.h" +#include "output/outform.h" +#include "output/outlib.h" + +#if defined(OF_MACHO64) + +/* Mach-O in-file header structure sizes */ +#define MACHO_HEADER64_SIZE (32) +#define MACHO_SEGCMD64_SIZE (72) +#define MACHO_SECTCMD64_SIZE (80) +#define MACHO_SYMCMD_SIZE (24) +#define MACHO_NLIST64_SIZE (16) +#define MACHO_RELINFO64_SIZE (8) + +/* Mach-O file header values */ +#define MH_MAGIC_64 (0xfeedfacf) +#define CPU_TYPE_X86_64 (0x01000007) /* x86-64 platform */ +#define CPU_SUBTYPE_I386_ALL (3) /* all-x86 compatible */ +#define MH_OBJECT (0x1) /* object file */ + +#define LC_SEGMENT_64 (0x19) /* segment load command */ +#define LC_SYMTAB (0x2) /* symbol table load command */ + +#define VM_PROT_NONE (0x00) +#define VM_PROT_READ (0x01) +#define VM_PROT_WRITE (0x02) +#define VM_PROT_EXECUTE (0x04) + +#define VM_PROT_DEFAULT (VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE) +#define VM_PROT_ALL (VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE) + +struct section { + /* nasm internal data */ + struct section *next; + struct SAA *data; + int32_t index; + struct reloc *relocs; + int align; + + /* data that goes into the file */ + char sectname[16]; /* what this section is called */ + char segname[16]; /* segment this section will be in */ + uint64_t addr; /* in-memory address (subject to alignment) */ + uint64_t size; /* in-memory and -file size */ + uint32_t nreloc; /* relocation entry count */ + uint32_t flags; /* type and attributes (masked) */ + uint32_t extreloc; /* external relocations */ +}; + +#define SECTION_TYPE 0x000000ff /* section type mask */ + +#define S_REGULAR (0x0) /* standard section */ +#define S_ZEROFILL (0x1) /* zerofill, in-memory only */ + +#define SECTION_ATTRIBUTES_SYS 0x00ffff00 /* system setable attributes */ +#define S_ATTR_SOME_INSTRUCTIONS 0x00000400 /* section contains some + machine instructions */ +#define S_ATTR_EXT_RELOC 0x00000200 /* section has external + relocation entries */ +#define S_ATTR_LOC_RELOC 0x00000100 /* section has local + relocation entries */ +#define S_ATTR_PURE_INSTRUCTIONS 0x80000000 /* section uses pure + machine instructions */ + +static struct sectmap { + const char *nasmsect; + const char *segname; + const char *sectname; + const int32_t flags; +} sectmap[] = { + {".text", "__TEXT", "__text", S_REGULAR|S_ATTR_SOME_INSTRUCTIONS|S_ATTR_PURE_INSTRUCTIONS}, + {".data", "__DATA", "__data", S_REGULAR}, + {".rodata", "__DATA", "__const", S_REGULAR}, + {".bss", "__DATA", "__bss", S_ZEROFILL}, + {NULL, NULL, NULL, 0} +}; + +struct reloc { + /* nasm internal data */ + struct reloc *next; + + /* data that goes into the file */ + int32_t addr; /* op's offset in section */ + uint32_t snum:24, /* contains symbol index if + ** ext otherwise in-file + ** section number */ + pcrel:1, /* relative relocation */ + length:2, /* 0=byte, 1=word, 2=int32_t, 3=int64_t */ + ext:1, /* external symbol referenced */ + type:4; /* reloc type */ +}; + +#define R_ABS 0 /* absolute relocation */ +#define R_SCATTERED 0x80000000 /* reloc entry is scattered if + ** highest bit == 1 */ + +struct symbol { + /* nasm internal data */ + struct symbol *next; /* next symbol in the list */ + char *name; /* name of this symbol */ + int32_t initial_snum; /* symbol number used above in + reloc */ + int32_t snum; /* true snum for reloc */ + + /* data that goes into the file */ + uint32_t strx; /* string table index */ + uint8_t type; /* symbol type */ + uint8_t sect; /* NO_SECT or section number */ + uint16_t desc; /* for stab debugging, 0 for us */ + uint64_t value; /* offset of symbol in section */ +}; + +/* symbol type bits */ +#define N_EXT 0x01 /* global or external symbol */ + +#define N_UNDF 0x0 /* undefined symbol | n_sect == */ +#define N_ABS 0x2 /* absolute symbol | NO_SECT */ +#define N_SECT 0xe /* defined symbol, n_sect holds + ** section number */ + +#define N_TYPE 0x0e /* type bit mask */ + +#define DEFAULT_SECTION_ALIGNMENT 0 /* byte (i.e. no) alignment */ + +/* special section number values */ +#define NO_SECT 0 /* no section, invalid */ +#define MAX_SECT 255 /* maximum number of sections */ + +static struct section *sects, **sectstail; +static struct symbol *syms, **symstail; +static uint32_t nsyms; + +/* These variables are set by macho_layout_symbols() to organize + the symbol table and string table in order the dynamic linker + expects. They are then used in macho_write() to put out the + symbols and strings in that order. + + The order of the symbol table is: + local symbols + defined external symbols (sorted by name) + undefined external symbols (sorted by name) + + The order of the string table is: + strings for external symbols + strings for local symbols + */ +static uint32_t ilocalsym = 0; +static uint32_t iextdefsym = 0; +static uint32_t iundefsym = 0; +static uint32_t nlocalsym; +static uint32_t nextdefsym; +static uint32_t nundefsym; +static struct symbol **extdefsyms = NULL; +static struct symbol **undefsyms = NULL; + +static struct RAA *extsyms; +static struct SAA *strs; +static uint32_t strslen; + +static FILE *machofp; +static efunc error; +static evalfunc evaluate; + +extern struct ofmt of_macho64; + +/* Global file information. This should be cleaned up into either + a structure or as function arguments. */ +uint32_t head_ncmds64 = 0; +uint32_t head_sizeofcmds64 = 0; +uint64_t seg_filesize64 = 0; +uint64_t seg_vmsize64 = 0; +uint32_t seg_nsects64 = 0; +uint64_t rel_padcnt64 = 0; + + +#define xstrncpy(xdst, xsrc) \ + memset(xdst, '\0', sizeof(xdst)); /* zero out whole buffer */ \ + strncpy(xdst, xsrc, sizeof(xdst)); /* copy over string */ \ + xdst[sizeof(xdst) - 1] = '\0'; /* proper null-termination */ + +#define align(x, y) \ + (((x) + (y) - 1) & ~((y) - 1)) /* align x to multiple of y */ + +#define alignint32_t(x) \ + align(x, sizeof(int32_t)) /* align x to int32_t boundary */ + +#define alignint64_t(x) \ + align(x, sizeof(int64_t)) /* align x to int64_t boundary */ + +static void debug_reloc (struct reloc *); +static void debug_section_relocs (struct section *) _unused; + +static int exact_log2 (uint32_t align) +{ + if (align == 0) { + return 0; + } else if (align & (align-1)) { + return -1; /* Not a power of 2 */ + } else { +#ifdef HAVE_GNUC_4 + return __builtin_ctzl (align); +#else + uint32_t result = 0; + + /* We know exactly one bit is set at this point. */ + if (align & 0xffff0000) + result |= 16; + if (align & 0xff00ff00) + result |= 8; + if (align & 0xf0f0f0f0) + result |= 4; + if (align & 0xcccccccc) + result |= 2; + if (align & 0xaaaaaaaa) + result |= 1; + + return result; +#endif + } +} + +static struct section *get_section_by_name(const char *segname, + const char *sectname) +{ + struct section *s; + + for (s = sects; s != NULL; s = s->next) + if (!strcmp(s->segname, segname) && !strcmp(s->sectname, sectname)) + break; + + return s; +} + +static struct section *get_section_by_index(const int32_t index) +{ + struct section *s; + + for (s = sects; s != NULL; s = s->next) + if (index == s->index) + break; + + return s; +} + +static int32_t get_section_index_by_name(const char *segname, + const char *sectname) +{ + struct section *s; + + for (s = sects; s != NULL; s = s->next) + if (!strcmp(s->segname, segname) && !strcmp(s->sectname, sectname)) + return s->index; + + return -1; +} + +static char *get_section_name_by_index(const int32_t index) +{ + struct section *s; + + for (s = sects; s != NULL; s = s->next) + if (index == s->index) + return s->sectname; + + return NULL; +} + +static uint8_t get_section_fileindex_by_index(const int32_t index) +{ + struct section *s; + uint8_t i = 1; + + for (s = sects; s != NULL && i < MAX_SECT; s = s->next, ++i) + if (index == s->index) + return i; + + if (i == MAX_SECT) + error(ERR_WARNING, + "too many sections (>255) - clipped by fileindex"); + + return NO_SECT; +} + +static struct symbol *get_closest_section_symbol_by_offset(uint8_t fileindex, int64_t offset) +{ + struct symbol *sym; + + for (sym = syms; sym != NULL; sym = sym->next) { + if ((sym->sect != NO_SECT) && + (sym->sect == fileindex) && + ((int64_t)sym->value >= offset)) + return sym; + } + + return NULL; +} + + +/* + * Special section numbers which are used to define Mach-O special + * symbols, which can be used with WRT to provide PIC relocation + * types. + */ +static int32_t macho_gotpcrel_sect; + +static void macho_init(FILE * fp, efunc errfunc, ldfunc ldef, + evalfunc eval) +{ + char zero = 0; + + maxbits = 64; + machofp = fp; + error = errfunc; + evaluate = eval; + + (void)ldef; /* placate optimizers */ + + sects = NULL; + sectstail = §s; + + syms = NULL; + symstail = &syms; + nsyms = 0; + nlocalsym = 0; + nextdefsym = 0; + nundefsym = 0; + + extsyms = raa_init(); + strs = saa_init(1L); + + /* string table starts with a zero byte - don't ask why */ + saa_wbytes(strs, &zero, sizeof(char)); + strslen = 1; + + /* add special symbol for ..gotpcrel */ + macho_gotpcrel_sect = seg_alloc(); + macho_gotpcrel_sect ++; + ldef("..gotpcrel", macho_gotpcrel_sect, 0L, NULL, false, false, &of_macho64, error); +} + +static int macho_setinfo(enum geninfo type, char **val) +{ + (void)type; + (void)val; + return 0; +} + +static void sect_write(struct section *sect, + const uint8_t *data, uint32_t len) +{ + saa_wbytes(sect->data, data, len); + sect->size += len; +} + +static int32_t add_reloc(struct section *sect, int32_t section, + int pcrel, int bytes, int64_t reloff) +{ + struct reloc *r; + struct symbol *sym; + int32_t fi; + int32_t adjustment = 0; + + /* NeXT as puts relocs in reversed order (address-wise) into the + ** files, so we do the same, doesn't seem to make much of a + ** difference either way */ + r = nasm_malloc(sizeof(struct reloc)); + r->next = sect->relocs; + sect->relocs = r; + + /* the current end of the section will be the symbol's address for + ** now, might have to be fixed by macho_fixup_relocs() later on. make + ** sure we don't make the symbol scattered by setting the highest + ** bit by accident */ + r->addr = sect->size & ~R_SCATTERED; + r->ext = 1; + r->pcrel = (pcrel ? 1 : 0); + + /* match byte count 1, 2, 4, 8 to length codes 0, 1, 2, 3 respectively */ + switch(bytes){ + case 1: + r->length = 0; + break; + case 2: + r->length = 1; + break; + case 4: + r->length = 2; + break; + case 8: + r->length = 3; + break; + default: + break; + } + + /* set default relocation values */ + r->type = 0; // X86_64_RELOC_UNSIGNED + r->snum = R_ABS; // Absolute Symbol (indicates no relocation) + + /* absolute relocation */ + if (pcrel == 0) { + + /* intra-section */ + if (section == NO_SEG) { + // r->snum = R_ABS; // Set above + + /* inter-section */ + } else { + fi = get_section_fileindex_by_index(section); + + /* external */ + if (fi == NO_SECT) { + r->snum = raa_read(extsyms, section); + + /* local */ + } else { + sym = get_closest_section_symbol_by_offset(fi, reloff); + r->snum = sym->initial_snum; + adjustment = sym->value; + } + } + + /* relative relocation */ + } else if (pcrel == 1) { + + /* intra-section */ + if (section == NO_SEG) { + r->type = 1; // X86_64_RELOC_SIGNED + + /* inter-section */ + } else { + r->type = 2; // X86_64_RELOC_BRANCH + fi = get_section_fileindex_by_index(section); + + /* external */ + if (fi == NO_SECT) { + sect->extreloc = 1; + r->snum = raa_read(extsyms, section); + + /* local */ + } else { + sym = get_closest_section_symbol_by_offset(fi, reloff); + r->snum = sym->initial_snum; + adjustment = sym->value; + } + } + + /* subtractor */ + } else if (pcrel == 2) { + r->pcrel = 0; + r->type = 5; // X86_64_RELOC_SUBTRACTOR + + /* gotpcrel */ + } else if (pcrel == 3) { + r->type = 4; // X86_64_RELOC_GOT + r->snum = macho_gotpcrel_sect; + + /* gotpcrel MOVQ load */ + } else if (pcrel == 4) { + r->type = 3; // X86_64_RELOC_GOT_LOAD + r->snum = macho_gotpcrel_sect; + } + + ++sect->nreloc; + + return adjustment; +} + +static void macho_output(int32_t secto, const void *data, + enum out_type type, uint64_t size, + int32_t section, int32_t wrt) +{ + struct section *s, *sbss; + int64_t addr; + uint8_t mydata[16], *p, gotload; + + if (secto == NO_SEG) { + if (type != OUT_RESERVE) + error(ERR_NONFATAL, "attempt to assemble code in " + "[ABSOLUTE] space"); + + return; + } + + s = get_section_by_index(secto); + + if (s == NULL) { + error(ERR_WARNING, "attempt to assemble code in" + " section %d: defaulting to `.text'", secto); + s = get_section_by_name("__TEXT", "__text"); + + /* should never happen */ + if (s == NULL) + error(ERR_PANIC, "text section not found"); + } + + sbss = get_section_by_name("__DATA", "__bss"); + + if (s == sbss && type != OUT_RESERVE) { + error(ERR_WARNING, "attempt to initialize memory in the" + " BSS section: ignored"); + s->size += realsize(type, size); + return; + } + + switch (type) { + case OUT_RESERVE: + if (s != sbss) { + error(ERR_WARNING, "uninitialized space declared in" + " %s section: zeroing", + get_section_name_by_index(secto)); + + sect_write(s, NULL, size); + } else + s->size += size; + + break; + + case OUT_RAWDATA: + if (section != NO_SEG) + error(ERR_PANIC, "OUT_RAWDATA with other than NO_SEG"); + + sect_write(s, data, size); + break; + + case OUT_ADDRESS: + addr = *(int64_t *)data; + if (section != NO_SEG) { + if (section % 2) { + error(ERR_NONFATAL, "Mach-O format does not support" + " section base references"); + } else { + if (wrt == NO_SEG) { + if (size < 8) { + error(ERR_NONFATAL, "Mach-O 64-bit format does not support" + " 32-bit absolute addresses"); + /* + Seemingly, Mach-O's X86_64_RELOC_SUBTRACTOR would require + pre-determined knowledge of where the image base would be, + making it impractical for use in intermediate object files + */ + } else { + addr -= add_reloc(s, section, 0, size, addr); // X86_64_RELOC_UNSIGNED + } + } else { + error(ERR_NONFATAL, "Mach-O format does not support" + " this use of WRT"); + } + } + } + + p = mydata; + WRITEADDR(p, addr, size); + sect_write(s, mydata, size); + break; + + case OUT_REL2ADR: + p = mydata; + WRITESHORT(p, *(int64_t *)data); + + if (section == secto) + error(ERR_PANIC, "intra-section OUT_REL2ADR"); + + if (section == NO_SEG) { + /* Do nothing */ + } else if (section % 2) { + error(ERR_NONFATAL, "Mach-O format does not support" + " section base references"); + } else { + error(ERR_NONFATAL, "Unsupported non-32-bit" + " Macho-O relocation [2]"); + } + + sect_write(s, mydata, 2L); + break; + + case OUT_REL4ADR: + p = mydata; + WRITELONG(p, *(int64_t *)data); + + if (section == secto) + error(ERR_PANIC, "intra-section OUT_REL4ADR"); + + if (section != NO_SEG && section % 2) { + error(ERR_NONFATAL, "Mach-O format does not support" + " section base references"); + } else { + if (wrt == NO_SEG) { + *mydata -= add_reloc(s, section, 1, 4, (int64_t)*mydata); // X86_64_RELOC_SIGNED/BRANCH + } else if (wrt == macho_gotpcrel_sect) { + if (s->data->datalen > 1) { + saa_fread(s->data, s->data->datalen-2, &gotload, 1); // Retrieve Instruction Opcode + } else { + gotload = 0; + } + if (gotload == 0x8B) { // Check for MOVQ Opcode + *mydata -= add_reloc(s, section, 4, 4, (int64_t)*mydata); // X86_64_GOT_LOAD (MOVQ load) + } else { + *mydata -= add_reloc(s, section, 3, 4, (int64_t)*mydata); // X86_64_GOT + } + } else { + error(ERR_NONFATAL, "Mach-O format does not support" + " this use of WRT"); + wrt = NO_SEG; /* we can at least _try_ to continue */ + } + } + + sect_write(s, mydata, 4L); + break; + + default: + error(ERR_PANIC, "unknown output type?"); + break; + } +} + +static int32_t macho_section(char *name, int pass, int *bits) +{ + int32_t index, originalIndex; + char *sectionAttributes; + struct sectmap *sm; + struct section *s; + + (void)pass; + + /* Default to 64 bits. */ + if (!name) { + *bits = 64; + name = ".text"; + sectionAttributes = NULL; + } else { + sectionAttributes = name; + name = nasm_strsep(§ionAttributes, " \t"); + } + + for (sm = sectmap; sm->nasmsect != NULL; ++sm) { + /* make lookup into section name translation table */ + if (!strcmp(name, sm->nasmsect)) { + char *currentAttribute; + + /* try to find section with that name */ + originalIndex = index = get_section_index_by_name(sm->segname, + sm->sectname); + + /* create it if it doesn't exist yet */ + if (index == -1) { + s = *sectstail = nasm_malloc(sizeof(struct section)); + s->next = NULL; + sectstail = &s->next; + + s->data = saa_init(1L); + s->index = seg_alloc(); + s->relocs = NULL; + s->align = -1; + + xstrncpy(s->segname, sm->segname); + xstrncpy(s->sectname, sm->sectname); + s->size = 0; + s->nreloc = 0; + s->flags = sm->flags; + + index = s->index; + } else { + s = get_section_by_index(index); + } + + while ((NULL != sectionAttributes) + && (currentAttribute = nasm_strsep(§ionAttributes, " \t"))) { + if (0 != *currentAttribute) { + if (!nasm_strnicmp("align=", currentAttribute, 6)) { + char *end; + int newAlignment, value; + + value = strtoul(currentAttribute + 6, (char**)&end, 0); + newAlignment = exact_log2(value); + + if (0 != *end) { + error(ERR_PANIC, + "unknown or missing alignment value \"%s\" " + "specified for section \"%s\"", + currentAttribute + 6, + name); + return NO_SEG; + } else if (0 > newAlignment) { + error(ERR_PANIC, + "alignment of %d (for section \"%s\") is not " + "a power of two", + value, + name); + return NO_SEG; + } + + if ((-1 != originalIndex) + && (s->align != newAlignment) + && (s->align != -1)) { + error(ERR_PANIC, + "section \"%s\" has already been specified " + "with alignment %d, conflicts with new " + "alignment of %d", + name, + (1 << s->align), + value); + return NO_SEG; + } + + s->align = newAlignment; + } else if (!nasm_stricmp("data", currentAttribute)) { + /* Do nothing; 'data' is implicit */ + } else { + error(ERR_PANIC, + "unknown section attribute %s for section %s", + currentAttribute, + name); + return NO_SEG; + } + } + } + + return index; + } + } + + error(ERR_PANIC, "invalid section name %s", name); + return NO_SEG; +} + +static void macho_symdef(char *name, int32_t section, int64_t offset, + int is_global, char *special) +{ + struct symbol *sym; + + if (special) { + error(ERR_NONFATAL, "The Mach-O output format does " + "not support any special symbol types"); + return; + } + + if (is_global == 3) { + error(ERR_NONFATAL, "The Mach-O format does not " + "(yet) support forward reference fixups."); + return; + } + + if (name[0] == '.' && name[1] == '.' && name[2] != '@') { + /* + * This is a NASM special symbol. We never allow it into + * the Macho-O symbol table, even if it's a valid one. If it + * _isn't_ a valid one, we should barf immediately. + */ + if (strcmp(name, "..gotpcrel")) + error(ERR_NONFATAL, "unrecognized special symbol `%s'", name); + return; + } + + sym = *symstail = nasm_malloc(sizeof(struct symbol)); + sym->next = NULL; + symstail = &sym->next; + + sym->name = name; + sym->strx = strslen; + sym->type = 0; + sym->desc = 0; + sym->value = offset; + sym->initial_snum = -1; + + /* external and common symbols get N_EXT */ + if (is_global != 0) { + sym->type |= N_EXT; + } + + if (section == NO_SEG) { + /* symbols in no section get absolute */ + sym->type |= N_ABS; + sym->sect = NO_SECT; + } else { + sym->type |= N_SECT; + + /* get the in-file index of the section the symbol was defined in */ + sym->sect = get_section_fileindex_by_index(section); + + /* track the initially allocated symbol number for use in future fix-ups */ + sym->initial_snum = nsyms; + + if (sym->sect == NO_SECT) { + + /* remember symbol number of references to external + ** symbols, this works because every external symbol gets + ** its own section number allocated internally by nasm and + ** can so be used as a key */ + extsyms = raa_write(extsyms, section, nsyms); + + switch (is_global) { + case 1: + case 2: + /* there isn't actually a difference between global + ** and common symbols, both even have their size in + ** sym->value */ + sym->type = N_EXT; + break; + + default: + /* give an error on unfound section if it's not an + ** external or common symbol (assemble_file() does a + ** seg_alloc() on every call for them) */ + error(ERR_PANIC, "in-file index for section %d not found", + section); + } + } + } + ++nsyms; +} + +static int32_t macho_segbase(int32_t section) +{ + return section; +} + +static int macho_directive(char *directive, char *value, int pass) +{ + (void)directive; + (void)value; + (void)pass; + return 0; +} + +static void macho_filename(char *inname, char *outname, efunc error) +{ + standard_extension(inname, outname, ".o", error); +} + +extern macros_t macho_stdmac[]; + +/* Comparison function for qsort symbol layout. */ +static int layout_compare (const struct symbol **s1, + const struct symbol **s2) +{ + return (strcmp ((*s1)->name, (*s2)->name)); +} + +/* The native assembler does a few things in a similar function + + * Remove temporary labels + * Sort symbols according to local, external, undefined (by name) + * Order the string table + + We do not remove temporary labels right now. + + numsyms is the total number of symbols we have. strtabsize is the + number entries in the string table. */ + +static void macho_layout_symbols (uint32_t *numsyms, + uint32_t *strtabsize) +{ + struct symbol *sym, **symp; + uint32_t i,j; + + *numsyms = 0; + *strtabsize = sizeof (char); + + symp = &syms; + + while ((sym = *symp)) { + /* Undefined symbols are now external. */ + if (sym->type == N_UNDF) + sym->type |= N_EXT; + + if ((sym->type & N_EXT) == 0) { + sym->snum = *numsyms; + *numsyms = *numsyms + 1; + nlocalsym++; + } + else { + if ((sym->type & N_TYPE) != N_UNDF) { + nextdefsym++; + } else { + nundefsym++; + } + + /* If we handle debug info we'll want + to check for it here instead of just + adding the symbol to the string table. */ + sym->strx = *strtabsize; + saa_wbytes (strs, sym->name, (int32_t)(strlen(sym->name) + 1)); + *strtabsize += strlen(sym->name) + 1; + } + symp = &(sym->next); + } + + /* Next, sort the symbols. Most of this code is a direct translation from + the Apple cctools symbol layout. We need to keep compatibility with that. */ + /* Set the indexes for symbol groups into the symbol table */ + ilocalsym = 0; + iextdefsym = nlocalsym; + iundefsym = nlocalsym + nextdefsym; + + /* allocate arrays for sorting externals by name */ + extdefsyms = nasm_malloc(nextdefsym * sizeof(struct symbol *)); + undefsyms = nasm_malloc(nundefsym * sizeof(struct symbol *)); + + i = 0; + j = 0; + + symp = &syms; + + while ((sym = *symp)) { + + if((sym->type & N_EXT) == 0) { + sym->strx = *strtabsize; + saa_wbytes (strs, sym->name, (int32_t)(strlen (sym->name) + 1)); + *strtabsize += strlen(sym->name) + 1; + } + else { + if((sym->type & N_TYPE) != N_UNDF) { + extdefsyms[i++] = sym; + } else { + undefsyms[j++] = sym; + } + } + symp = &(sym->next); + } + + qsort(extdefsyms, nextdefsym, sizeof(struct symbol *), + (int (*)(const void *, const void *))layout_compare); + qsort(undefsyms, nundefsym, sizeof(struct symbol *), + (int (*)(const void *, const void *))layout_compare); + + for(i = 0; i < nextdefsym; i++) { + extdefsyms[i]->snum = *numsyms; + *numsyms += 1; + } + for(j = 0; j < nundefsym; j++) { + undefsyms[j]->snum = *numsyms; + *numsyms += 1; + } +} + +/* Calculate some values we'll need for writing later. */ + +static void macho_calculate_sizes (void) +{ + struct section *s; + + /* count sections and calculate in-memory and in-file offsets */ + for (s = sects; s != NULL; s = s->next) { + uint64_t pad = 0; + + /* zerofill sections aren't actually written to the file */ + if ((s->flags & SECTION_TYPE) != S_ZEROFILL) + seg_filesize64 += s->size; + + /* recalculate segment address based on alignment and vm size */ + s->addr = seg_vmsize64; + /* we need section alignment to calculate final section address */ + if (s->align == -1) + s->align = DEFAULT_SECTION_ALIGNMENT; + if(s->align) { + uint64_t newaddr = align(s->addr, 1 << s->align); + pad = newaddr - s->addr; + s->addr = newaddr; + } + + seg_vmsize64 += s->size + pad; + ++seg_nsects64; + } + + /* calculate size of all headers, load commands and sections to + ** get a pointer to the start of all the raw data */ + if (seg_nsects64 > 0) { + ++head_ncmds64; + head_sizeofcmds64 += + MACHO_SEGCMD64_SIZE + seg_nsects64 * MACHO_SECTCMD64_SIZE; + } + + if (nsyms > 0) { + ++head_ncmds64; + head_sizeofcmds64 += MACHO_SYMCMD_SIZE; + } +} + +/* Write out the header information for the file. */ + +static void macho_write_header (void) +{ + fwriteint32_t(MH_MAGIC_64, machofp); /* magic */ + fwriteint32_t(CPU_TYPE_X86_64, machofp); /* CPU type */ + fwriteint32_t(CPU_SUBTYPE_I386_ALL, machofp); /* CPU subtype */ + fwriteint32_t(MH_OBJECT, machofp); /* Mach-O file type */ + fwriteint32_t(head_ncmds64, machofp); /* number of load commands */ + fwriteint32_t(head_sizeofcmds64, machofp); /* size of load commands */ + fwriteint32_t(0, machofp); /* no flags */ + fwriteint32_t(0, machofp); /* reserved for future use */ +} + +/* Write out the segment load command at offset. */ + +static uint32_t macho_write_segment (uint64_t offset) +{ + uint64_t rel_base = alignint64_t (offset + seg_filesize64); + uint32_t s_reloff = 0; + struct section *s; + + fwriteint32_t(LC_SEGMENT_64, machofp); /* cmd == LC_SEGMENT_64 */ + + /* size of load command including section load commands */ + fwriteint32_t(MACHO_SEGCMD64_SIZE + seg_nsects64 * + MACHO_SECTCMD64_SIZE, machofp); + + /* in an MH_OBJECT file all sections are in one unnamed (name + ** all zeros) segment */ + fwritezero(16, machofp); + fwriteint64_t(0, machofp); /* in-memory offset */ + fwriteint64_t(seg_vmsize64, machofp); /* in-memory size */ + fwriteint64_t(offset, machofp); /* in-file offset to data */ + fwriteint64_t(seg_filesize64, machofp); /* in-file size */ + fwriteint32_t(VM_PROT_DEFAULT, machofp); /* maximum vm protection */ + fwriteint32_t(VM_PROT_DEFAULT, machofp); /* initial vm protection */ + fwriteint32_t(seg_nsects64, machofp); /* number of sections */ + fwriteint32_t(0, machofp); /* no flags */ + + /* emit section headers */ + for (s = sects; s != NULL; s = s->next) { + fwrite(s->sectname, sizeof(s->sectname), 1, machofp); + fwrite(s->segname, sizeof(s->segname), 1, machofp); + fwriteint64_t(s->addr, machofp); + fwriteint64_t(s->size, machofp); + + /* dummy data for zerofill sections or proper values */ + if ((s->flags & SECTION_TYPE) != S_ZEROFILL) { + fwriteint32_t(offset, machofp); + /* Write out section alignment, as a power of two. + e.g. 32-bit word alignment would be 2 (2^2 = 4). */ + if (s->align == -1) + s->align = DEFAULT_SECTION_ALIGNMENT; + fwriteint32_t(s->align, machofp); + /* To be compatible with cctools as we emit + a zero reloff if we have no relocations. */ + fwriteint32_t(s->nreloc ? rel_base + s_reloff : 0, machofp); + fwriteint32_t(s->nreloc, machofp); + + offset += s->size; + s_reloff += s->nreloc * MACHO_RELINFO64_SIZE; + } else { + fwriteint32_t(0, machofp); + fwriteint32_t(0, machofp); + fwriteint32_t(0, machofp); + fwriteint32_t(0, machofp); + } + + if (s->nreloc) { + s->flags |= S_ATTR_LOC_RELOC; + if (s->extreloc) + s->flags |= S_ATTR_EXT_RELOC; + } + + fwriteint32_t(s->flags, machofp); /* flags */ + fwriteint32_t(0, machofp); /* reserved */ + fwriteint32_t(0, machofp); /* reserved */ + + fwriteint32_t(0, machofp); /* align */ + } + + rel_padcnt64 = rel_base - offset; + offset = rel_base + s_reloff; + + return offset; +} + +/* For a given chain of relocs r, write out the entire relocation + chain to the object file. */ + +static void macho_write_relocs (struct reloc *r) +{ + while (r) { + uint32_t word2; + + fwriteint32_t(r->addr, machofp); /* reloc offset */ + + word2 = r->snum; + word2 |= r->pcrel << 24; + word2 |= r->length << 25; + word2 |= r->ext << 27; + word2 |= r->type << 28; + fwriteint32_t(word2, machofp); /* reloc data */ + r = r->next; + } +} + +/* Write out the section data. */ +static void macho_write_section (void) +{ + struct section *s, *s2; + struct reloc *r; + uint8_t fi, *p, *q, blk[8]; + int32_t len; + int64_t l; + + for (s = sects; s != NULL; s = s->next) { + if ((s->flags & SECTION_TYPE) == S_ZEROFILL) + continue; + + /* no padding needs to be done to the sections */ + + /* Like a.out Mach-O references things in the data or bss + * sections by addresses which are actually relative to the + * start of the _text_ section, in the _file_. See outaout.c + * for more information. */ + saa_rewind(s->data); + for (r = s->relocs; r != NULL; r = r->next) { + len = (int32_t)r->length << 1; + if(len > 4) len = 8; + saa_fread(s->data, r->addr, blk, len); + p = q = blk; + l = *p++; + + /* get offset based on relocation type */ + if (r->length > 0) { + l += ((int64_t)*p++) << 8; + + if (r->length > 1) { + l += ((int64_t)*p++) << 16; + l += ((int64_t)*p++) << 24; + } + + if (r->length > 2) { + l += ((int64_t)*p++) << 32; + l += ((int64_t)*p++) << 40; + l += ((int64_t)*p++) << 48; + l += ((int64_t)*p++) << 56; + } + + + } + + /* If the relocation is internal add to the current section + offset. Otherwise the only value we need is the symbol + offset which we already have. The linker takes care + of the rest of the address. */ + if (!r->ext) { + /* generate final address by section address and offset */ + for (s2 = sects, fi = 1; + s2 != NULL; s2 = s2->next, fi++) { + if (fi == r->snum) { + l += s2->addr; + break; + } + } + } + + /* write new offset back */ + if (r->length == 3) + WRITEDLONG(q, l); + else if (r->length == 2) + WRITELONG(q, l); + else if (r->length == 1) + WRITESHORT(q, l); + else + *q++ = l & 0xFF; + + saa_fwrite(s->data, r->addr, blk, len); + } + + /* dump the section data to file */ + saa_fpwrite(s->data, machofp); + } + + /* pad last section up to reloc entries on int64_t boundary */ + fwritezero(rel_padcnt64, machofp); + + /* emit relocation entries */ + for (s = sects; s != NULL; s = s->next) + macho_write_relocs (s->relocs); +} + +/* Write out the symbol table. We should already have sorted this + before now. */ +static void macho_write_symtab (void) +{ + struct symbol *sym; + struct section *s; + int64_t fi; + uint64_t i; + + /* we don't need to pad here since MACHO_RELINFO_SIZE == 8 */ + + for (sym = syms; sym != NULL; sym = sym->next) { + if ((sym->type & N_EXT) == 0) { + fwriteint32_t(sym->strx, machofp); /* string table entry number */ + fwrite(&sym->type, 1, 1, machofp); /* symbol type */ + fwrite(&sym->sect, 1, 1, machofp); /* section */ + fwriteint16_t(sym->desc, machofp); /* description */ + + /* Fix up the symbol value now that we know the final section + sizes. */ + if (((sym->type & N_TYPE) == N_SECT) && (sym->sect != NO_SECT)) { + for (s = sects, fi = 1; + s != NULL && fi < sym->sect; s = s->next, ++fi) + sym->value += s->size; + } + + fwriteint64_t(sym->value, machofp); /* value (i.e. offset) */ + } + } + + for (i = 0; i < nextdefsym; i++) { + sym = extdefsyms[i]; + fwriteint32_t(sym->strx, machofp); + fwrite(&sym->type, 1, 1, machofp); /* symbol type */ + fwrite(&sym->sect, 1, 1, machofp); /* section */ + fwriteint16_t(sym->desc, machofp); /* description */ + + /* Fix up the symbol value now that we know the final section + sizes. */ + if (((sym->type & N_TYPE) == N_SECT) && (sym->sect != NO_SECT)) { + for (s = sects, fi = 1; + s != NULL && fi < sym->sect; s = s->next, ++fi) + sym->value += s->size; + } + + fwriteint64_t(sym->value, machofp); /* value (i.e. offset) */ + } + + for (i = 0; i < nundefsym; i++) { + sym = undefsyms[i]; + fwriteint32_t(sym->strx, machofp); + fwrite(&sym->type, 1, 1, machofp); /* symbol type */ + fwrite(&sym->sect, 1, 1, machofp); /* section */ + fwriteint16_t(sym->desc, machofp); /* description */ + + // Fix up the symbol value now that we know the final section sizes. + if (((sym->type & N_TYPE) == N_SECT) && (sym->sect != NO_SECT)) { + for (s = sects, fi = 1; + s != NULL && fi < sym->sect; s = s->next, ++fi) + sym->value += s->size; + } + + fwriteint64_t(sym->value, machofp); // value (i.e. offset) + } + +} + +/* Fixup the snum in the relocation entries, we should be + doing this only for externally referenced symbols. */ +static void macho_fixup_relocs (struct reloc *r) +{ + struct symbol *sym; + + while (r != NULL) { + if (r->ext) { + for (sym = syms; sym != NULL; sym = sym->next) { + if (sym->initial_snum == r->snum) { + r->snum = sym->snum; + break; + } + } + } + r = r->next; + } +} + +/* Write out the object file. */ + +static void macho_write (void) +{ + uint64_t offset = 0; + + /* mach-o object file structure: + ** + ** mach header + ** uint32_t magic + ** int cpu type + ** int cpu subtype + ** uint32_t mach file type + ** uint32_t number of load commands + ** uint32_t size of all load commands + ** (includes section struct size of segment command) + ** uint32_t flags + ** + ** segment command + ** uint32_t command type == LC_SEGMENT_64 + ** uint32_t size of load command + ** (including section load commands) + ** char[16] segment name + ** uint64_t in-memory offset + ** uint64_t in-memory size + ** uint64_t in-file offset to data area + ** uint64_t in-file size + ** (in-memory size excluding zerofill sections) + ** int maximum vm protection + ** int initial vm protection + ** uint32_t number of sections + ** uint32_t flags + ** + ** section commands + ** char[16] section name + ** char[16] segment name + ** uint64_t in-memory offset + ** uint64_t in-memory size + ** uint32_t in-file offset + ** uint32_t alignment + ** (irrelevant in MH_OBJECT) + ** uint32_t in-file offset of relocation entires + ** uint32_t number of relocations + ** uint32_t flags + ** uint32_t reserved + ** uint32_t reserved + ** + ** symbol table command + ** uint32_t command type == LC_SYMTAB + ** uint32_t size of load command + ** uint32_t symbol table offset + ** uint32_t number of symbol table entries + ** uint32_t string table offset + ** uint32_t string table size + ** + ** raw section data + ** + ** padding to int64_t boundary + ** + ** relocation data (struct reloc) + ** int32_t offset + ** uint data (symbolnum, pcrel, length, extern, type) + ** + ** symbol table data (struct nlist) + ** int32_t string table entry number + ** uint8_t type + ** (extern, absolute, defined in section) + ** uint8_t section + ** (0 for global symbols, section number of definition (>= 1, <= + ** 254) for local symbols, size of variable for common symbols + ** [type == extern]) + ** int16_t description + ** (for stab debugging format) + ** uint64_t value (i.e. file offset) of symbol or stab offset + ** + ** string table data + ** list of null-terminated strings + */ + + /* Emit the Mach-O header. */ + macho_write_header(); + + offset = MACHO_HEADER64_SIZE + head_sizeofcmds64; + + /* emit the segment load command */ + if (seg_nsects64 > 0) + offset = macho_write_segment (offset); + else + error(ERR_WARNING, "no sections?"); + + if (nsyms > 0) { + /* write out symbol command */ + fwriteint32_t(LC_SYMTAB, machofp); /* cmd == LC_SYMTAB */ + fwriteint32_t(MACHO_SYMCMD_SIZE, machofp); /* size of load command */ + fwriteint32_t(offset, machofp); /* symbol table offset */ + fwriteint32_t(nsyms, machofp); /* number of symbol + ** table entries */ + + offset += nsyms * MACHO_NLIST64_SIZE; + fwriteint32_t(offset, machofp); /* string table offset */ + fwriteint32_t(strslen, machofp); /* string table size */ + } + + /* emit section data */ + if (seg_nsects64 > 0) + macho_write_section (); + + /* emit symbol table if we have symbols */ + if (nsyms > 0) + macho_write_symtab (); + + /* we don't need to pad here since MACHO_NLIST64_SIZE == 16 */ + + /* emit string table */ + saa_fpwrite(strs, machofp); +} +/* We do quite a bit here, starting with finalizing all of the data + for the object file, writing, and then freeing all of the data from + the file. */ + +static void macho_cleanup(int debuginfo) +{ + struct section *s; + struct reloc *r; + struct symbol *sym; + + (void)debuginfo; + + /* Sort all symbols. */ + macho_layout_symbols (&nsyms, &strslen); + + /* Fixup relocation entries */ + for (s = sects; s != NULL; s = s->next) { + macho_fixup_relocs (s->relocs); + } + + /* First calculate and finalize needed values. */ + macho_calculate_sizes(); + macho_write(); + + /* done - yay! */ + fclose(machofp); + + /* free up everything */ + while (sects->next) { + s = sects; + sects = sects->next; + + saa_free(s->data); + while (s->relocs != NULL) { + r = s->relocs; + s->relocs = s->relocs->next; + nasm_free(r); + } + + nasm_free(s); + } + + saa_free(strs); + raa_free(extsyms); + + if (syms) { + while (syms->next) { + sym = syms; + syms = syms->next; + + nasm_free (sym); + } +} +} + +/* Debugging routines. */ +static void debug_reloc (struct reloc *r) +{ + fprintf (stdout, "reloc:\n"); + fprintf (stdout, "\taddr: %"PRId32"\n", r->addr); + fprintf (stdout, "\tsnum: %d\n", r->snum); + fprintf (stdout, "\tpcrel: %d\n", r->pcrel); + fprintf (stdout, "\tlength: %d\n", r->length); + fprintf (stdout, "\text: %d\n", r->ext); + fprintf (stdout, "\ttype: %d\n", r->type); +} + +static void debug_section_relocs (struct section *s) +{ + struct reloc *r = s->relocs; + + fprintf (stdout, "relocs for section %s:\n\n", s->sectname); + + while (r != NULL) { + debug_reloc (r); + r = r->next; + } +} + +struct ofmt of_macho64 = { + "NeXTstep/OpenStep/Rhapsody/Darwin/MacOS X (x86_64) object files", + "macho64", + 0, + null_debug_arr, + &null_debug_form, + macho_stdmac, + macho_init, + macho_setinfo, + macho_output, + macho_symdef, + macho_section, + macho_segbase, + macho_directive, + macho_filename, + macho_cleanup +}; + +#endif + +/* + * Local Variables: + * mode:c + * c-basic-offset:4 + * End: + * + * end of file */ -- 2.7.4