path: root/contrib/tools/yasm/modules/objfmts/coff/coff-objfmt.c

/* 
 * COFF (DJGPP) object format 
 * 
 *  Copyright (C) 2002-2007  Peter Johnson 
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 * 2. 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 AUTHOR AND OTHER 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 AUTHOR OR OTHER 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. 
 */ 
#include <util.h> 
#include <time.h> 
 
#include <libyasm.h> 
 
#include "coff-objfmt.h" 
 
 
#define REGULAR_OUTBUF_SIZE     1024 
 
/* Defining this to 0 sets all section VMA's to 0 rather than as the same as 
 * the LMA.  According to the DJGPP COFF Spec, this should be set to 1 
 * (VMA=LMA), and indeed DJGPP's GCC output shows VMA=LMA.  However, NASM 
 * outputs VMA=0 (as if this was 0), and GNU objdump output looks a lot nicer 
 * with VMA=0.  Who's right?  This is #defined as changing this setting affects 
 * several places in the code. 
 */ 
#define COFF_SET_VMA    (!objfmt_coff->win32) 
 
#define COFF_MACHINE_I386       0x014C 
#define COFF_MACHINE_AMD64      0x8664 
 
#define COFF_F_LNNO     0x0004      /* line number info NOT present */ 
#define COFF_F_LSYMS    0x0008      /* local symbols NOT present */ 
#define COFF_F_AR32WR   0x0100      /* 32-bit little endian file */ 
 
typedef struct coff_reloc { 
    yasm_reloc reloc; 
    enum { 
        COFF_RELOC_ABSOLUTE = 0,            /* absolute, no reloc needed */ 
 
        /* I386 relocations */ 
        COFF_RELOC_I386_ADDR16 = 0x1,       /* 16-bit absolute reference */ 
        COFF_RELOC_I386_REL16 = 0x2,        /* 16-bit PC-relative reference */ 
        COFF_RELOC_I386_ADDR32 = 0x6,       /* 32-bit absolute reference */ 
        COFF_RELOC_I386_ADDR32NB = 0x7,     /* 32-bit absolute ref w/o base */ 
        COFF_RELOC_I386_SEG12 = 0x9,        /* 16-bit absolute segment ref */ 
        COFF_RELOC_I386_SECTION = 0xA,      /* section index */ 
        COFF_RELOC_I386_SECREL = 0xB,       /* offset from start of segment */ 
        COFF_RELOC_I386_TOKEN = 0xC,        /* CLR metadata token */ 
        COFF_RELOC_I386_SECREL7 = 0xD,  /* 7-bit offset from base of sect */ 
        COFF_RELOC_I386_REL32 = 0x14,       /* 32-bit PC-relative reference */ 
 
        /* AMD64 relocations */ 
        COFF_RELOC_AMD64_ADDR64 = 0x1,      /* 64-bit address (VA) */ 
        COFF_RELOC_AMD64_ADDR32 = 0x2,      /* 32-bit address (VA) */ 
        COFF_RELOC_AMD64_ADDR32NB = 0x3,    /* 32-bit address w/o base (RVA) */ 
        COFF_RELOC_AMD64_REL32 = 0x4,       /* 32-bit relative (0 byte dist) */ 
        COFF_RELOC_AMD64_REL32_1 = 0x5,     /* 32-bit relative (1 byte dist) */ 
        COFF_RELOC_AMD64_REL32_2 = 0x6,     /* 32-bit relative (2 byte dist) */ 
        COFF_RELOC_AMD64_REL32_3 = 0x7,     /* 32-bit relative (3 byte dist) */ 
        COFF_RELOC_AMD64_REL32_4 = 0x8,     /* 32-bit relative (4 byte dist) */ 
        COFF_RELOC_AMD64_REL32_5 = 0x9,     /* 32-bit relative (5 byte dist) */ 
        COFF_RELOC_AMD64_SECTION = 0xA,     /* section index */ 
        COFF_RELOC_AMD64_SECREL = 0xB,  /* 32-bit offset from base of sect */ 
        COFF_RELOC_AMD64_SECREL7 = 0xC, /* 7-bit offset from base of sect */ 
        COFF_RELOC_AMD64_TOKEN = 0xD        /* CLR metadata token */ 
    } type;                         /* type of relocation */ 
} coff_reloc; 
 
#define COFF_STYP_TEXT          0x00000020UL 
#define COFF_STYP_DATA          0x00000040UL 
#define COFF_STYP_BSS           0x00000080UL 
#define COFF_STYP_INFO          0x00000200UL 
#define COFF_STYP_STD_MASK      0x000003FFUL 
#define COFF_STYP_ALIGN_MASK    0x00F00000UL 
#define COFF_STYP_ALIGN_SHIFT   20 
#define COFF_STYP_NRELOC_OVFL   0x01000000UL 
#define COFF_STYP_DISCARD       0x02000000UL 
#define COFF_STYP_NOCACHE       0x04000000UL 
#define COFF_STYP_NOPAGE        0x08000000UL 
#define COFF_STYP_SHARED        0x10000000UL 
#define COFF_STYP_EXECUTE       0x20000000UL 
#define COFF_STYP_READ          0x40000000UL 
#define COFF_STYP_WRITE         0x80000000UL 
#define COFF_STYP_WIN32_MASK    0xFF000000UL 
 
#define COFF_FLAG_NOBASE        (1UL<<0)    /* Use no-base (NB) relocs */ 
 
typedef struct coff_section_data { 
    /*@dependent@*/ yasm_symrec *sym;   /* symbol created for this section */ 
    unsigned int scnum;     /* section number (1=first section) */ 
    unsigned long flags;    /* section flags (see COFF_STYP_* above) */ 
    unsigned long addr;     /* starting memory address (first section -> 0) */ 
    unsigned long scnptr;   /* file ptr to raw data */ 
    unsigned long size;     /* size of raw data (section data) in bytes */ 
    unsigned long relptr;   /* file ptr to relocation */ 
    unsigned long nreloc;   /* number of relocation entries >64k -> error */ 
    unsigned long flags2;   /* internal flags (see COFF_FLAG_* above) */ 
    unsigned long strtab_name;  /* strtab offset of name if name > 8 chars */ 
    int isdebug;            /* is a debug section? */ 
} coff_section_data; 
 
typedef enum coff_symrec_sclass { 
    COFF_SCL_EFCN = 0xff,       /* physical end of function     */ 
    COFF_SCL_NULL = 0, 
    COFF_SCL_AUTO = 1,          /* automatic variable           */ 
    COFF_SCL_EXT = 2,           /* external symbol              */ 
    COFF_SCL_STAT = 3,          /* static                       */ 
    COFF_SCL_REG = 4,           /* register variable            */ 
    COFF_SCL_EXTDEF = 5,        /* external definition          */ 
    COFF_SCL_LABEL = 6,         /* label                        */ 
    COFF_SCL_ULABEL = 7,        /* undefined label              */ 
    COFF_SCL_MOS = 8,           /* member of structure          */ 
    COFF_SCL_ARG = 9,           /* function argument            */ 
    COFF_SCL_STRTAG = 10,       /* structure tag                */ 
    COFF_SCL_MOU = 11,          /* member of union              */ 
    COFF_SCL_UNTAG = 12,        /* union tag                    */ 
    COFF_SCL_TPDEF = 13,        /* type definition              */ 
    COFF_SCL_USTATIC = 14,      /* undefined static             */ 
    COFF_SCL_ENTAG = 15,        /* enumeration tag              */ 
    COFF_SCL_MOE = 16,          /* member of enumeration        */ 
    COFF_SCL_REGPARM = 17,      /* register parameter           */ 
    COFF_SCL_FIELD = 18,        /* bit field                    */ 
    COFF_SCL_AUTOARG = 19,      /* auto argument                */ 
    COFF_SCL_LASTENT = 20,      /* dummy entry (end of block)   */ 
    COFF_SCL_BLOCK = 100,       /* ".bb" or ".eb"               */ 
    COFF_SCL_FCN = 101,         /* ".bf" or ".ef"               */ 
    COFF_SCL_EOS = 102,         /* end of structure             */ 
    COFF_SCL_FILE = 103,        /* file name                    */ 
    COFF_SCL_LINE = 104,        /* line # reformatted as symbol table entry */ 
    COFF_SCL_ALIAS = 105,       /* duplicate tag                */ 
    COFF_SCL_HIDDEN = 106       /* ext symbol in dmert public lib */ 
} coff_symrec_sclass; 
 
typedef union coff_symtab_auxent { 
    /* no data needed for section symbol auxent, all info avail from sym */ 
    /*@owned@*/ char *fname;        /* filename aux entry */ 
} coff_symtab_auxent; 
 
typedef enum coff_symtab_auxtype { 
    COFF_SYMTAB_AUX_NONE = 0, 
    COFF_SYMTAB_AUX_SECT, 
    COFF_SYMTAB_AUX_FILE 
} coff_symtab_auxtype; 
 
typedef struct coff_symrec_data { 
    int forcevis;                       /* force visibility in symbol table */ 
    unsigned long index;                /* assigned COFF symbol table index */ 
    unsigned int type;                  /* type */ 
    coff_symrec_sclass sclass;          /* storage class */ 
 
    int numaux;                 /* number of auxiliary entries */ 
    coff_symtab_auxtype auxtype;    /* type of aux entries */ 
    coff_symtab_auxent aux[1];  /* actually may be any size (including 0) */ 
} coff_symrec_data; 
 
typedef struct yasm_objfmt_coff { 
    yasm_objfmt_base objfmt;                /* base structure */ 
 
    unsigned int parse_scnum;               /* sect numbering in parser */ 
    int win32;                              /* nonzero for win32/64 output */ 
    int win64;                              /* nonzero for win64 output */ 
 
    unsigned int machine;                   /* COFF machine to use */ 
 
    coff_symrec_data *filesym_data;         /* Data for .file symbol */ 
 
    /* data for .def/.endef and related directives */ 
    coff_symrec_data *def_sym;              /* symbol specified by .def */ 
 
    /* data for win64 proc_frame and related directives */ 
    unsigned long proc_frame;   /* Line number of start of proc, or 0 */ 
    unsigned long done_prolog;  /* Line number of end of prologue, or 0 */ 
    /*@null@*/ coff_unwind_info *unwind;        /* Unwind info */ 
 
    yasm_symrec *ssym_imagebase;            /* ..imagebase symbol for win64 */ 
} yasm_objfmt_coff; 
 
typedef struct coff_objfmt_output_info { 
    yasm_object *object; 
    yasm_objfmt_coff *objfmt_coff; 
    yasm_errwarns *errwarns; 
    /*@dependent@*/ FILE *f; 
    /*@only@*/ unsigned char *buf; 
    yasm_section *sect; 
    /*@dependent@*/ coff_section_data *csd; 
    unsigned long addr;                 /* start of next section */ 
 
    unsigned long indx;                 /* current symbol index */ 
    int all_syms;                       /* outputting all symbols? */ 
    unsigned long strtab_offset;        /* current string table offset */ 
} coff_objfmt_output_info; 
 
static void coff_section_data_destroy(/*@only@*/ void *d); 
static void coff_section_data_print(void *data, FILE *f, int indent_level); 
 
static const yasm_assoc_data_callback coff_section_data_cb = { 
    coff_section_data_destroy, 
    coff_section_data_print 
}; 
 
static void coff_symrec_data_destroy(/*@only@*/ void *d); 
static void coff_symrec_data_print(void *data, FILE *f, int indent_level); 
 
static const yasm_assoc_data_callback coff_symrec_data_cb = { 
    coff_symrec_data_destroy, 
    coff_symrec_data_print 
}; 
 
/* Bytecode callback function prototypes */ 
static void win32_sxdata_bc_destroy(void *contents); 
static void win32_sxdata_bc_print(const void *contents, FILE *f, 
                                  int indent_level); 
static int win32_sxdata_bc_calc_len 
    (yasm_bytecode *bc, yasm_bc_add_span_func add_span, void *add_span_data); 
static int win32_sxdata_bc_tobytes 
    (yasm_bytecode *bc, unsigned char **bufp, unsigned char *bufstart, void *d, 
     yasm_output_value_func output_value, 
     /*@null@*/ yasm_output_reloc_func output_reloc); 
 
/* Bytecode callback structures */ 
static const yasm_bytecode_callback win32_sxdata_bc_callback = { 
    win32_sxdata_bc_destroy, 
    win32_sxdata_bc_print, 
    yasm_bc_finalize_common, 
    NULL, 
    win32_sxdata_bc_calc_len, 
    yasm_bc_expand_common, 
    win32_sxdata_bc_tobytes, 
    0 
}; 
 
yasm_objfmt_module yasm_coff_LTX_objfmt; 
yasm_objfmt_module yasm_win32_LTX_objfmt; 
yasm_objfmt_module yasm_win64_LTX_objfmt; 
 
 
static /*@dependent@*/ coff_symrec_data * 
coff_objfmt_sym_set_data(yasm_symrec *sym, coff_symrec_sclass sclass, 
                         int numaux, coff_symtab_auxtype auxtype) 
{ 
    coff_symrec_data *sym_data; 
 
    sym_data = yasm_xmalloc(sizeof(coff_symrec_data) + 
                            (numaux-1)*sizeof(coff_symtab_auxent)); 
    sym_data->forcevis = 0; 
    sym_data->index = 0; 
    sym_data->type = 0; 
    sym_data->sclass = sclass; 
    sym_data->numaux = numaux; 
    sym_data->auxtype = auxtype; 
 
    yasm_symrec_add_data(sym, &coff_symrec_data_cb, sym_data); 
 
    return sym_data; 
} 
 
static yasm_objfmt_coff * 
coff_common_create(yasm_object *object) 
{ 
    yasm_objfmt_coff *objfmt_coff = yasm_xmalloc(sizeof(yasm_objfmt_coff)); 
    yasm_symrec *filesym; 
 
    /* Only support x86 arch */ 
    if (yasm__strcasecmp(yasm_arch_keyword(object->arch), "x86") != 0) { 
        yasm_xfree(objfmt_coff); 
        return NULL; 
    } 
 
    objfmt_coff->parse_scnum = 1;    /* section numbering starts at 1 */ 
 
    /* FIXME: misuse of NULL bytecode here; it works, but only barely. */ 
    filesym = yasm_symtab_define_special(object->symtab, ".file", 
                                         YASM_SYM_GLOBAL); 
    objfmt_coff->filesym_data = 
        coff_objfmt_sym_set_data(filesym, COFF_SCL_FILE, 1, 
                                 COFF_SYMTAB_AUX_FILE); 
    /* Filename is set in coff_objfmt_output */ 
    objfmt_coff->filesym_data->aux[0].fname = NULL; 
 
    objfmt_coff->proc_frame = 0; 
    objfmt_coff->done_prolog = 0; 
    objfmt_coff->unwind = NULL; 
    objfmt_coff->ssym_imagebase = NULL; 
 
    return objfmt_coff; 
} 
 
static yasm_objfmt * 
coff_objfmt_create(yasm_object *object) 
{ 
    yasm_objfmt_coff *objfmt_coff = coff_common_create(object); 
 
    if (objfmt_coff) { 
        /* Support x86 and amd64 machines of x86 arch */ 
        if (yasm__strcasecmp(yasm_arch_get_machine(object->arch), "x86") == 0) 
            objfmt_coff->machine = COFF_MACHINE_I386; 
        else if (yasm__strcasecmp(yasm_arch_get_machine(object->arch), 
                                  "amd64") == 0) 
            objfmt_coff->machine = COFF_MACHINE_AMD64; 
        else { 
            yasm_xfree(objfmt_coff); 
            return NULL; 
        } 
 
        objfmt_coff->objfmt.module = &yasm_coff_LTX_objfmt; 
        objfmt_coff->win32 = 0; 
        objfmt_coff->win64 = 0; 
    } 
    return (yasm_objfmt *)objfmt_coff; 
} 
 
static yasm_objfmt * 
win32_objfmt_create(yasm_object *object) 
{ 
    yasm_objfmt_coff *objfmt_coff = coff_common_create(object); 
 
    if (objfmt_coff) { 
        /* Support x86 and amd64 machines of x86 arch. 
         * (amd64 machine supported for backwards compatibility) 
         */ 
        if (yasm__strcasecmp(yasm_arch_get_machine(object->arch), 
                             "x86") == 0) { 
            objfmt_coff->machine = COFF_MACHINE_I386; 
            objfmt_coff->objfmt.module = &yasm_win32_LTX_objfmt; 
            objfmt_coff->win64 = 0; 
        } else if (yasm__strcasecmp(yasm_arch_get_machine(object->arch), 
                                    "amd64") == 0) { 
            objfmt_coff->machine = COFF_MACHINE_AMD64; 
            objfmt_coff->objfmt.module = &yasm_win64_LTX_objfmt; 
            objfmt_coff->win64 = 1; 
        } else { 
            yasm_xfree(objfmt_coff); 
            return NULL; 
        } 
 
        objfmt_coff->win32 = 1; 
        /* Define a @feat.00 symbol for win32 safeseh handling */ 
        if (!objfmt_coff->win64) { 
            yasm_symrec *feat00; 
            coff_symrec_data *sym_data; 
            feat00 = yasm_symtab_define_equ(object->symtab, "@feat.00", 
                yasm_expr_create_ident(yasm_expr_int( 
                    yasm_intnum_create_uint(1)), 0), 0); 
            sym_data = coff_objfmt_sym_set_data(feat00, COFF_SCL_STAT, 0, 
                                                COFF_SYMTAB_AUX_NONE); 
            sym_data->forcevis = 1; 
        } 
    } 
    return (yasm_objfmt *)objfmt_coff; 
} 
 
static yasm_objfmt * 
win64_objfmt_create(yasm_object *object) 
{ 
    yasm_objfmt_coff *objfmt_coff = coff_common_create(object); 
 
    if (objfmt_coff) { 
        /* Support amd64 machine of x86 arch */ 
        if (yasm__strcasecmp(yasm_arch_get_machine(object->arch), 
                             "amd64") == 0) { 
            objfmt_coff->machine = COFF_MACHINE_AMD64; 
        } else { 
            yasm_xfree(objfmt_coff); 
            return NULL; 
        } 
 
        objfmt_coff->objfmt.module = &yasm_win64_LTX_objfmt; 
        objfmt_coff->win32 = 1; 
        objfmt_coff->win64 = 1; 
        objfmt_coff->ssym_imagebase = 
            yasm_symtab_define_label(object->symtab, "..imagebase", NULL, 0, 0); 
    } 
    return (yasm_objfmt *)objfmt_coff; 
} 
 
static void 
coff_objfmt_init_new_section(yasm_section *sect, unsigned long line) 
{ 
    yasm_object *object = yasm_section_get_object(sect); 
    const char *sectname = yasm_section_get_name(sect); 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    coff_section_data *data; 
    yasm_symrec *sym; 
 
    data = yasm_xmalloc(sizeof(coff_section_data)); 
    data->scnum = objfmt_coff->parse_scnum++; 
    data->flags = 0; 
    data->addr = 0; 
    data->scnptr = 0; 
    data->size = 0; 
    data->relptr = 0; 
    data->nreloc = 0; 
    data->flags2 = 0; 
    data->strtab_name = 0; 
    data->isdebug = 0; 
 
    if (yasm__strncasecmp(sectname, ".debug", 6)==0) { 
        data->flags = COFF_STYP_DATA; 
        if (objfmt_coff->win32) 
            data->flags |= COFF_STYP_DISCARD|COFF_STYP_READ; 
        data->isdebug = 1; 
    } else 
        data->flags = COFF_STYP_TEXT; 
 
    yasm_section_add_data(sect, &coff_section_data_cb, data); 
 
    sym = yasm_symtab_define_label(object->symtab, sectname, 
                                   yasm_section_bcs_first(sect), 1, line); 
    yasm_symrec_declare(sym, YASM_SYM_GLOBAL, line); 
    coff_objfmt_sym_set_data(sym, COFF_SCL_STAT, 1, COFF_SYMTAB_AUX_SECT); 
    data->sym = sym; 
} 
 
static int 
coff_objfmt_set_section_addr(yasm_section *sect, /*@null@*/ void *d) 
{ 
    /*@null@*/ coff_objfmt_output_info *info = (coff_objfmt_output_info *)d; 
    /*@dependent@*/ /*@null@*/ coff_section_data *csd; 
 
    assert(info != NULL); 
    csd = yasm_section_get_data(sect, &coff_section_data_cb); 
    assert(csd != NULL); 
 
    csd->addr = info->addr; 
    info->addr += yasm_bc_next_offset(yasm_section_bcs_last(sect)); 
 
    return 0; 
} 
 
static int 
coff_objfmt_output_value(yasm_value *value, unsigned char *buf, 
                         unsigned int destsize, unsigned long offset, 
                         yasm_bytecode *bc, int warn, /*@null@*/ void *d) 
{ 
    /*@null@*/ coff_objfmt_output_info *info = (coff_objfmt_output_info *)d; 
    yasm_objfmt_coff *objfmt_coff; 
    /*@only@*/ /*@null@*/ yasm_intnum *dist = NULL; 
    /*@dependent@*/ /*@null@*/ yasm_intnum *intn; 
    unsigned long intn_val, intn_minus; 
    int retval; 
    unsigned int valsize = value->size; 
 
    assert(info != NULL); 
    objfmt_coff = info->objfmt_coff; 
 
    if (value->abs) 
        value->abs = yasm_expr_simplify(value->abs, 1); 
 
    /* Try to output constant and PC-relative section-local first. 
     * Note this does NOT output any value with a SEG, WRT, external, 
     * cross-section, or non-PC-relative reference (those are handled below). 
     */ 
    switch (yasm_value_output_basic(value, buf, destsize, bc, warn, 
                                    info->object->arch)) { 
        case -1: 
            return 1; 
        case 0: 
            break; 
        default: 
            return 0; 
    } 
 
    /* Handle other expressions, with relocation if necessary */ 
    if (value->rshift > 0 
        || (value->seg_of && (value->wrt || value->curpos_rel)) 
        || (value->section_rel && (value->wrt || value->curpos_rel))) { 
        yasm_error_set(YASM_ERROR_TOO_COMPLEX, 
                       N_("coff: relocation too complex")); 
        return 1; 
    } 
 
    intn_val = 0; 
    intn_minus = 0; 
    if (value->rel) { 
        yasm_sym_vis vis = yasm_symrec_get_visibility(value->rel); 
        /*@dependent@*/ /*@null@*/ yasm_symrec *sym = value->rel; 
        unsigned long addr; 
        coff_reloc *reloc; 
        int nobase = info->csd->flags2 & COFF_FLAG_NOBASE; 
 
        /* Sometimes we want the relocation to be generated against one 
         * symbol but the value generated correspond to a different symbol. 
         * This is done through (sym being referenced) WRT (sym used for 
         * reloc).  Note both syms need to be in the same section! 
         */ 
        if (value->wrt && value->wrt == objfmt_coff->ssym_imagebase) 
            nobase = 1; 
        else if (value->wrt) { 
            /*@dependent@*/ /*@null@*/ yasm_bytecode *rel_precbc, *wrt_precbc; 
 
            if (!yasm_symrec_get_label(sym, &rel_precbc) 
                || !yasm_symrec_get_label(value->wrt, &wrt_precbc)) { 
                yasm_error_set(YASM_ERROR_TOO_COMPLEX, 
                               N_("coff: wrt expression too complex")); 
                return 1; 
            } 
            dist = yasm_calc_bc_dist(wrt_precbc, rel_precbc); 
            if (!dist) { 
                yasm_error_set(YASM_ERROR_TOO_COMPLEX, 
                               N_("coff: cannot wrt across sections")); 
                return 1; 
            } 
            sym = value->wrt; 
        } 
 
        if (vis & YASM_SYM_COMMON) { 
            /* In standard COFF, COMMON symbols have their length added in */ 
            if (!objfmt_coff->win32) { 
                /*@dependent@*/ /*@null@*/ yasm_expr **csize_expr; 
                /*@dependent@*/ /*@null@*/ yasm_intnum *common_size; 
 
                csize_expr = yasm_symrec_get_common_size(sym); 
                assert(csize_expr != NULL); 
                common_size = yasm_expr_get_intnum(csize_expr, 1); 
                if (!common_size) { 
                    yasm_error_set(YASM_ERROR_TOO_COMPLEX, 
                                   N_("coff: common size too complex")); 
                    return 1; 
                } 
 
                if (yasm_intnum_sign(common_size) < 0) { 
                    yasm_error_set(YASM_ERROR_VALUE, 
                                   N_("coff: common size is negative")); 
                    return 1; 
                } 
 
                intn_val += yasm_intnum_get_uint(common_size); 
            } 
        } else if (!(vis & YASM_SYM_EXTERN) && !objfmt_coff->win64) { 
            /*@dependent@*/ /*@null@*/ yasm_bytecode *sym_precbc; 
 
            /* Local symbols need relocation to their section's start */ 
            if (yasm_symrec_get_label(sym, &sym_precbc)) { 
                yasm_section *sym_sect = yasm_bc_get_section(sym_precbc); 
                /*@null@*/ coff_section_data *sym_csd; 
                sym_csd = yasm_section_get_data(sym_sect, 
                                                &coff_section_data_cb); 
                assert(sym_csd != NULL); 
                sym = sym_csd->sym; 
                intn_val = yasm_bc_next_offset(sym_precbc); 
                if (COFF_SET_VMA) 
                    intn_val += sym_csd->addr; 
            } 
        } 
 
        if (value->curpos_rel) { 
            /* For standard COFF, need to adjust to start of section, e.g. 
             * subtract out the bytecode offset. 
             * For Win32 COFF, need to adjust based on value size and position. 
             * For Win64 COFF that's IP-relative, adjust to next bytecode; 
             * the difference between the offset+destsize and BC length is 
             * taken care of by special relocation types. 
             */ 
            if (objfmt_coff->win64 && value->ip_rel) 
                intn_val += bc->len*bc->mult_int; 
            else if (objfmt_coff->win32) 
                intn_val += offset+destsize; 
            else 
                intn_minus = bc->offset; 
        } 
 
        if (value->seg_of) { 
            /* Segment generation; zero value. */ 
            intn_val = 0; 
            intn_minus = 0; 
        } 
 
        /* Generate reloc */ 
        reloc = yasm_xmalloc(sizeof(coff_reloc)); 
        addr = bc->offset + offset; 
        if (COFF_SET_VMA) 
            addr += info->addr; 
        reloc->reloc.addr = yasm_intnum_create_uint(addr); 
        reloc->reloc.sym = sym; 
 
        if (value->curpos_rel) { 
            if (objfmt_coff->machine == COFF_MACHINE_I386) { 
                if (valsize == 32) 
                    reloc->type = COFF_RELOC_I386_REL32; 
                else { 
                    yasm_error_set(YASM_ERROR_TYPE, 
                                   N_("coff: invalid relocation size")); 
                    return 1; 
                } 
            } else if (objfmt_coff->machine == COFF_MACHINE_AMD64) { 
                if (valsize != 32) { 
                    yasm_error_set(YASM_ERROR_TYPE, 
                                   N_("coff: invalid relocation size")); 
                    return 1; 
                } 
                if (!value->ip_rel) 
                    reloc->type = COFF_RELOC_AMD64_REL32; 
                else switch (bc->len*bc->mult_int - (offset+destsize)) { 
                    case 0: 
                        reloc->type = COFF_RELOC_AMD64_REL32; 
                        break; 
                    case 1: 
                        reloc->type = COFF_RELOC_AMD64_REL32_1; 
                        break; 
                    case 2: 
                        reloc->type = COFF_RELOC_AMD64_REL32_2; 
                        break; 
                    case 3: 
                        reloc->type = COFF_RELOC_AMD64_REL32_3; 
                        break; 
                    case 4: 
                        reloc->type = COFF_RELOC_AMD64_REL32_4; 
                        break; 
                    case 5: 
                        reloc->type = COFF_RELOC_AMD64_REL32_5; 
                        break; 
                    default: 
                        yasm_error_set(YASM_ERROR_TYPE, 
                                       N_("coff: invalid relocation size")); 
                        return 1; 
                } 
            } else 
                yasm_internal_error(N_("coff objfmt: unrecognized machine")); 
        } else if (value->seg_of) { 
            if (objfmt_coff->machine == COFF_MACHINE_I386) 
                reloc->type = COFF_RELOC_I386_SECTION; 
            else if (objfmt_coff->machine == COFF_MACHINE_AMD64) 
                reloc->type = COFF_RELOC_AMD64_SECTION; 
            else 
                yasm_internal_error(N_("coff objfmt: unrecognized machine")); 
        } else if (value->section_rel) { 
            if (objfmt_coff->machine == COFF_MACHINE_I386) 
                reloc->type = COFF_RELOC_I386_SECREL; 
            else if (objfmt_coff->machine == COFF_MACHINE_AMD64) 
                reloc->type = COFF_RELOC_AMD64_SECREL; 
            else 
                yasm_internal_error(N_("coff objfmt: unrecognized machine")); 
        } else { 
            if (objfmt_coff->machine == COFF_MACHINE_I386) { 
                if (nobase) 
                    reloc->type = COFF_RELOC_I386_ADDR32NB; 
                else 
                    reloc->type = COFF_RELOC_I386_ADDR32; 
            } else if (objfmt_coff->machine == COFF_MACHINE_AMD64) { 
                if (valsize == 32) { 
                    if (nobase) 
                        reloc->type = COFF_RELOC_AMD64_ADDR32NB; 
                    else 
                        reloc->type = COFF_RELOC_AMD64_ADDR32; 
                } else if (valsize == 64) 
                    reloc->type = COFF_RELOC_AMD64_ADDR64; 
                else { 
                    yasm_error_set(YASM_ERROR_TYPE, 
                                   N_("coff: invalid relocation size")); 
                    return 1; 
                } 
            } else 
                yasm_internal_error(N_("coff objfmt: unrecognized machine")); 
        } 
        info->csd->nreloc++; 
        yasm_section_add_reloc(info->sect, (yasm_reloc *)reloc, yasm_xfree); 
    } 
 
    /* Build up final integer output from intn_val, intn_minus, value->abs, 
     * and dist.  We do all this at the end to avoid creating temporary 
     * intnums above (except for dist). 
     */ 
    if (intn_minus <= intn_val) 
        intn = yasm_intnum_create_uint(intn_val-intn_minus); 
    else { 
        intn = yasm_intnum_create_uint(intn_minus-intn_val); 
        yasm_intnum_calc(intn, YASM_EXPR_NEG, NULL); 
    } 
 
    if (value->abs) { 
        yasm_intnum *intn2 = yasm_expr_get_intnum(&value->abs, 0); 
        if (!intn2) { 
            yasm_error_set(YASM_ERROR_TOO_COMPLEX, 
                           N_("coff: relocation too complex")); 
            yasm_intnum_destroy(intn); 
            if (dist) 
                yasm_intnum_destroy(dist); 
            return 1; 
        } 
        yasm_intnum_calc(intn, YASM_EXPR_ADD, intn2); 
    } 
 
    if (dist) { 
        yasm_intnum_calc(intn, YASM_EXPR_ADD, dist); 
        yasm_intnum_destroy(dist); 
    } 
 
    retval = yasm_arch_intnum_tobytes(info->object->arch, intn, buf, destsize, 
                                      valsize, 0, bc, warn); 
    yasm_intnum_destroy(intn); 
    return retval; 
} 
 
static int 
coff_objfmt_output_bytecode(yasm_bytecode *bc, /*@null@*/ void *d) 
{ 
    /*@null@*/ coff_objfmt_output_info *info = (coff_objfmt_output_info *)d; 
    /*@null@*/ /*@only@*/ unsigned char *bigbuf; 
    unsigned long size = REGULAR_OUTBUF_SIZE; 
    int gap; 
 
    assert(info != NULL); 
 
    bigbuf = yasm_bc_tobytes(bc, info->buf, &size, &gap, info, 
                             coff_objfmt_output_value, NULL); 
 
    /* Don't bother doing anything else if size ended up being 0. */ 
    if (size == 0) { 
        if (bigbuf) 
            yasm_xfree(bigbuf); 
        return 0; 
    } 
 
    info->csd->size += size; 
 
    /* Warn that gaps are converted to 0 and write out the 0's. */ 
    if (gap) { 
        unsigned long left; 
        yasm_warn_set(YASM_WARN_UNINIT_CONTENTS, 
            N_("uninitialized space declared in code/data section: zeroing")); 
        /* Write out in chunks */ 
        memset(info->buf, 0, REGULAR_OUTBUF_SIZE); 
        left = size; 
        while (left > REGULAR_OUTBUF_SIZE) { 
            fwrite(info->buf, REGULAR_OUTBUF_SIZE, 1, info->f); 
            left -= REGULAR_OUTBUF_SIZE; 
        } 
        fwrite(info->buf, left, 1, info->f); 
    } else { 
        /* Output buf (or bigbuf if non-NULL) to file */ 
        fwrite(bigbuf ? bigbuf : info->buf, (size_t)size, 1, info->f); 
    } 
 
    /* If bigbuf was allocated, free it */ 
    if (bigbuf) 
        yasm_xfree(bigbuf); 
 
    return 0; 
} 
 
static int 
coff_objfmt_output_section(yasm_section *sect, /*@null@*/ void *d) 
{ 
    /*@null@*/ coff_objfmt_output_info *info = (coff_objfmt_output_info *)d; 
    /*@dependent@*/ /*@null@*/ coff_section_data *csd; 
    long pos; 
    coff_reloc *reloc; 
    unsigned char *localbuf; 
 
    assert(info != NULL); 
    csd = yasm_section_get_data(sect, &coff_section_data_cb); 
    assert(csd != NULL); 
 
    /* Add to strtab if in win32 format and name > 8 chars */ 
    if (info->objfmt_coff->win32) { 
        size_t namelen = strlen(yasm_section_get_name(sect)); 
        if (namelen > 8) { 
            csd->strtab_name = info->strtab_offset; 
            info->strtab_offset += (unsigned long)(namelen + 1); 
        } 
    } 
 
    if (!csd->isdebug) 
        csd->addr = info->addr; 
 
    if ((csd->flags & COFF_STYP_STD_MASK) == COFF_STYP_BSS) { 
        /* Don't output BSS sections. 
         * TODO: Check for non-reserve bytecodes? 
         */ 
        pos = 0;    /* position = 0 because it's not in the file */ 
        csd->size = yasm_bc_next_offset(yasm_section_bcs_last(sect)); 
    } else { 
        pos = ftell(info->f); 
        if (pos == -1) { 
            yasm__fatal(N_("could not get file position on output file")); 
            /*@notreached@*/ 
            return 1; 
        } 
 
        info->sect = sect; 
        info->csd = csd; 
        yasm_section_bcs_traverse(sect, info->errwarns, info, 
                                  coff_objfmt_output_bytecode); 
 
        /* Sanity check final section size */ 
        if (yasm_errwarns_num_errors(info->errwarns, 0) == 0 && 
            csd->size != yasm_bc_next_offset(yasm_section_bcs_last(sect))) 
            yasm_internal_error( 
                N_("coff: section computed size did not match actual size")); 
    } 
 
    /* Empty?  Go on to next section */ 
    if (csd->size == 0) 
        return 0; 
 
    if (!csd->isdebug) 
        info->addr += csd->size; 
    csd->scnptr = (unsigned long)pos; 
 
    /* No relocations to output?  Go on to next section */ 
    if (csd->nreloc == 0) 
        return 0; 
 
    pos = ftell(info->f); 
    if (pos == -1) { 
        yasm__fatal(N_("could not get file position on output file")); 
        /*@notreached@*/ 
        return 1; 
    } 
    csd->relptr = (unsigned long)pos; 
 
    /* If >=64K relocs (for Win32/64), we set a flag in the section header 
     * (NRELOC_OVFL) and the first relocation contains the number of relocs. 
     */ 
    if (csd->nreloc >= 64*1024 && info->objfmt_coff->win32) { 
        localbuf = info->buf; 
        YASM_WRITE_32_L(localbuf, csd->nreloc+1);   /* address of relocation */ 
        YASM_WRITE_32_L(localbuf, 0);           /* relocated symbol */ 
        YASM_WRITE_16_L(localbuf, 0);           /* type of relocation */ 
        fwrite(info->buf, 10, 1, info->f); 
    } 
 
    reloc = (coff_reloc *)yasm_section_relocs_first(sect); 
    while (reloc) { 
        /*@null@*/ coff_symrec_data *csymd; 
        localbuf = info->buf; 
 
        csymd = yasm_symrec_get_data(reloc->reloc.sym, &coff_symrec_data_cb); 
        if (!csymd) 
            yasm_internal_error( 
                N_("coff: no symbol data for relocated symbol")); 
 
        yasm_intnum_get_sized(reloc->reloc.addr, localbuf, 4, 32, 0, 0, 0); 
        localbuf += 4;                          /* address of relocation */ 
        YASM_WRITE_32_L(localbuf, csymd->index);    /* relocated symbol */ 
        YASM_WRITE_16_L(localbuf, reloc->type);     /* type of relocation */ 
        fwrite(info->buf, 10, 1, info->f); 
 
        reloc = (coff_reloc *)yasm_section_reloc_next((yasm_reloc *)reloc); 
    } 
 
    return 0; 
} 
 
static int 
coff_objfmt_output_sectstr(yasm_section *sect, /*@null@*/ void *d) 
{ 
    /*@null@*/ coff_objfmt_output_info *info = (coff_objfmt_output_info *)d; 
    const char *name; 
    size_t len; 
 
    /* Add to strtab if in win32 format and name > 8 chars */ 
    if (!info->objfmt_coff->win32) 
       return 0; 
     
    name = yasm_section_get_name(sect); 
    len = strlen(name); 
    if (len > 8) 
        fwrite(name, len+1, 1, info->f); 
    return 0; 
} 
 
static int 
coff_objfmt_output_secthead(yasm_section *sect, /*@null@*/ void *d) 
{ 
    /*@null@*/ coff_objfmt_output_info *info = (coff_objfmt_output_info *)d; 
    yasm_objfmt_coff *objfmt_coff; 
    /*@dependent@*/ /*@null@*/ coff_section_data *csd; 
    unsigned char *localbuf; 
    unsigned long align = yasm_section_get_align(sect); 
 
    assert(info != NULL); 
    objfmt_coff = info->objfmt_coff; 
    csd = yasm_section_get_data(sect, &coff_section_data_cb); 
    assert(csd != NULL); 
 
    /* Check to see if alignment is supported size */ 
    if (align > 8192) 
        align = 8192; 
 
    /* Convert alignment into flags setting */ 
    csd->flags &= ~COFF_STYP_ALIGN_MASK; 
    while (align != 0) { 
        csd->flags += 1<<COFF_STYP_ALIGN_SHIFT; 
        align >>= 1; 
    } 
 
    /* section name */ 
    localbuf = info->buf; 
    if (strlen(yasm_section_get_name(sect)) > 8) { 
        char namenum[30]; 
        sprintf(namenum, "/%ld", csd->strtab_name); 
        strncpy((char *)localbuf, namenum, 8); 
    } else 
        strncpy((char *)localbuf, yasm_section_get_name(sect), 8); 
    localbuf += 8; 
    if (csd->isdebug) { 
        YASM_WRITE_32_L(localbuf, 0);           /* physical address */ 
        YASM_WRITE_32_L(localbuf, 0);           /* virtual address */ 
    } else { 
        YASM_WRITE_32_L(localbuf, csd->addr);   /* physical address */ 
        if (COFF_SET_VMA) 
            YASM_WRITE_32_L(localbuf, csd->addr);/* virtual address */ 
        else 
            YASM_WRITE_32_L(localbuf, 0);       /* virtual address */ 
    } 
    YASM_WRITE_32_L(localbuf, csd->size);       /* section size */ 
    YASM_WRITE_32_L(localbuf, csd->scnptr);     /* file ptr to data */ 
    YASM_WRITE_32_L(localbuf, csd->relptr);     /* file ptr to relocs */ 
    YASM_WRITE_32_L(localbuf, 0);               /* file ptr to line nums */ 
    if (csd->nreloc >= 64*1024) { 
        /* Win32/64 has special handling for this case. */ 
        if (objfmt_coff->win32) 
            csd->flags |= COFF_STYP_NRELOC_OVFL; 
        else { 
            yasm_warn_set(YASM_WARN_GENERAL, 
                          N_("too many relocations in section `%s'"), 
                          yasm_section_get_name(sect)); 
            yasm_errwarn_propagate(info->errwarns, 0); 
        } 
        YASM_WRITE_16_L(localbuf, 0xFFFF);      /* max out */ 
    } else 
        YASM_WRITE_16_L(localbuf, csd->nreloc); /* num of relocation entries */ 
    YASM_WRITE_16_L(localbuf, 0);               /* num of line number entries */ 
    YASM_WRITE_32_L(localbuf, csd->flags);      /* flags */ 
    fwrite(info->buf, 40, 1, info->f); 
 
    return 0; 
} 
 
static int 
coff_objfmt_count_sym(yasm_symrec *sym, /*@null@*/ void *d) 
{ 
    /*@null@*/ coff_objfmt_output_info *info = (coff_objfmt_output_info *)d; 
    yasm_sym_vis vis = yasm_symrec_get_visibility(sym); 
    coff_symrec_data *sym_data; 
 
    assert(info != NULL); 
 
    sym_data = yasm_symrec_get_data(sym, &coff_symrec_data_cb); 
 
    if (info->all_syms || vis != YASM_SYM_LOCAL || yasm_symrec_is_abs(sym) || 
        (sym_data && sym_data->forcevis)) { 
        /* Save index in symrec data */ 
        if (!sym_data) 
            sym_data = coff_objfmt_sym_set_data(sym, COFF_SCL_NULL, 0, 
                                                COFF_SYMTAB_AUX_NONE); 
        /* Set storage class based on visibility if not already set */ 
        if (sym_data->sclass == COFF_SCL_NULL) { 
            if (vis & (YASM_SYM_EXTERN|YASM_SYM_GLOBAL|YASM_SYM_COMMON)) 
                sym_data->sclass = COFF_SCL_EXT; 
            else 
                sym_data->sclass = COFF_SCL_STAT; 
        } 
 
        sym_data->index = info->indx; 
 
        info->indx += sym_data->numaux + 1; 
    } 
    return 0; 
} 
 
static int 
coff_objfmt_output_sym(yasm_symrec *sym, /*@null@*/ void *d) 
{ 
    /*@null@*/ coff_objfmt_output_info *info = (coff_objfmt_output_info *)d; 
    yasm_sym_vis vis = yasm_symrec_get_visibility(sym); 
    int is_abs = yasm_symrec_is_abs(sym); 
    /*@dependent@*/ /*@null@*/ coff_symrec_data *csymd; 
    yasm_valparamhead *objext_valparams = 
        yasm_symrec_get_objext_valparams(sym); 
    csymd = yasm_symrec_get_data(sym, &coff_symrec_data_cb); 
 
    assert(info != NULL); 
 
    /* Look for "function" flag on global syms */ 
    if (csymd && csymd->type == 0 && (vis & YASM_SYM_GLOBAL) != 0) { 
        if (objext_valparams) { 
            const char *id = yasm_vp_id(yasm_vps_first(objext_valparams)); 
            if (yasm__strcasecmp(id, "function") == 0) 
                csymd->type = 0x20; 
        } 
    } 
 
    /* Don't output local syms unless outputting all syms */ 
    if (info->all_syms || vis != YASM_SYM_LOCAL || is_abs || 
        (csymd && csymd->forcevis)) { 
        /*@only*/ char *name; 
        const yasm_expr *equ_val; 
        const yasm_intnum *intn; 
        unsigned char *localbuf; 
        size_t len; 
        int aux; 
        unsigned long value = 0; 
        unsigned int scnum = 0xfffe;    /* -2 = debugging symbol */ 
        /*@dependent@*/ /*@null@*/ yasm_section *sect; 
        /*@dependent@*/ /*@null@*/ yasm_bytecode *precbc; 
        unsigned long scnlen = 0;   /* for sect auxent */ 
        unsigned long nreloc = 0;   /* for sect auxent */ 
        yasm_objfmt_coff *objfmt_coff = info->objfmt_coff; 
 
        if (is_abs) 
            name = yasm__xstrdup(".absolut"); 
        else 
            name = yasm_symrec_get_global_name(sym, info->object); 
        len = strlen(name); 
 
        /* Get symrec's of_data (needed for storage class) */ 
        if (!csymd) 
            yasm_internal_error(N_("coff: expected sym data to be present")); 
 
        /* Look at symrec for value/scnum/etc. */ 
        if (yasm_symrec_get_label(sym, &precbc)) { 
            if (precbc) 
                sect = yasm_bc_get_section(precbc); 
            else 
                sect = NULL; 
            /* it's a label: get value and offset. 
             * If there is not a section, leave as debugging symbol. 
             */ 
            if (sect) { 
                /*@dependent@*/ /*@null@*/ coff_section_data *csectd; 
                csectd = yasm_section_get_data(sect, &coff_section_data_cb); 
                if (csectd) { 
                    scnum = csectd->scnum; 
                    scnlen = csectd->size; 
                    nreloc = csectd->nreloc; 
                    if (COFF_SET_VMA) 
                        value = csectd->addr; 
                } else 
                    yasm_internal_error(N_("didn't understand section")); 
                if (precbc) 
                    value += yasm_bc_next_offset(precbc); 
            } 
        } else if ((equ_val = yasm_symrec_get_equ(sym))) { 
            yasm_expr *equ_val_copy = yasm_expr_copy(equ_val); 
            intn = yasm_expr_get_intnum(&equ_val_copy, 1); 
            if (!intn) { 
                if (vis & YASM_SYM_GLOBAL) { 
                    yasm_error_set(YASM_ERROR_NOT_CONSTANT, 
                        N_("global EQU value not an integer expression")); 
                    yasm_errwarn_propagate(info->errwarns, equ_val->line); 
                } 
            } else 
                value = yasm_intnum_get_uint(intn); 
            yasm_expr_destroy(equ_val_copy); 
 
            scnum = 0xffff;     /* -1 = absolute symbol */ 
        } else { 
            if (vis & YASM_SYM_COMMON) { 
                /*@dependent@*/ /*@null@*/ yasm_expr **csize_expr; 
                csize_expr = yasm_symrec_get_common_size(sym); 
                assert(csize_expr != NULL); 
                intn = yasm_expr_get_intnum(csize_expr, 1); 
                if (!intn) { 
                    yasm_error_set(YASM_ERROR_NOT_CONSTANT, 
                        N_("COMMON data size not an integer expression")); 
                    yasm_errwarn_propagate(info->errwarns, 
                                           (*csize_expr)->line); 
                } else 
                    value = yasm_intnum_get_uint(intn); 
                scnum = 0; 
            } 
            if (vis & YASM_SYM_EXTERN) 
                scnum = 0; 
        } 
 
        localbuf = info->buf; 
        if (len > 8) { 
            YASM_WRITE_32_L(localbuf, 0);       /* "zeros" field */ 
            YASM_WRITE_32_L(localbuf, info->strtab_offset); /* strtab offset */ 
            info->strtab_offset += (unsigned long)(len+1); 
        } else { 
            /* <8 chars, so no string table entry needed */ 
            strncpy((char *)localbuf, name, 8); 
            localbuf += 8; 
        } 
        YASM_WRITE_32_L(localbuf, value);       /* value */ 
        YASM_WRITE_16_L(localbuf, scnum);       /* section number */ 
        YASM_WRITE_16_L(localbuf, csymd->type); /* type */ 
        YASM_WRITE_8(localbuf, csymd->sclass);  /* storage class */ 
        YASM_WRITE_8(localbuf, csymd->numaux);  /* number of aux entries */ 
        fwrite(info->buf, 18, 1, info->f); 
        for (aux=0; aux<csymd->numaux; aux++) { 
            localbuf = info->buf; 
            memset(localbuf, 0, 18); 
            switch (csymd->auxtype) { 
                case COFF_SYMTAB_AUX_NONE: 
                    break; 
                case COFF_SYMTAB_AUX_SECT: 
                    YASM_WRITE_32_L(localbuf, scnlen);  /* section length */ 
                    YASM_WRITE_16_L(localbuf, nreloc);  /* number relocs */ 
                    YASM_WRITE_16_L(localbuf, 0);       /* number line nums */ 
                    break; 
                case COFF_SYMTAB_AUX_FILE: 
                    len = strlen(csymd->aux[0].fname); 
                    if (len > 14) { 
                        YASM_WRITE_32_L(localbuf, 0); 
                        YASM_WRITE_32_L(localbuf, info->strtab_offset); 
                        info->strtab_offset += (unsigned long)(len+1); 
                    } else 
                        strncpy((char *)localbuf, csymd->aux[0].fname, 14); 
                    break; 
                default: 
                    yasm_internal_error( 
                        N_("coff: unrecognized aux symtab type")); 
            } 
            fwrite(info->buf, 18, 1, info->f); 
        } 
        yasm_xfree(name); 
    } 
    return 0; 
} 
 
static int 
coff_objfmt_output_str(yasm_symrec *sym, /*@null@*/ void *d) 
{ 
    /*@null@*/ coff_objfmt_output_info *info = (coff_objfmt_output_info *)d; 
    yasm_sym_vis vis = yasm_symrec_get_visibility(sym); 
    /*@dependent@*/ /*@null@*/ coff_symrec_data *csymd; 
    csymd = yasm_symrec_get_data(sym, &coff_symrec_data_cb); 
 
    assert(info != NULL); 
 
    /* Don't output local syms unless outputting all syms */ 
    if (info->all_syms || vis != YASM_SYM_LOCAL || 
        (csymd && csymd->forcevis)) { 
        /*@only@*/ char *name = yasm_symrec_get_global_name(sym, info->object); 
        size_t len = strlen(name); 
        int aux; 
 
        if (!csymd) 
            yasm_internal_error(N_("coff: expected sym data to be present")); 
 
        if (len > 8) 
            fwrite(name, len+1, 1, info->f); 
        for (aux=0; aux<csymd->numaux; aux++) { 
            switch (csymd->auxtype) { 
                case COFF_SYMTAB_AUX_FILE: 
                    len = strlen(csymd->aux[0].fname); 
                    if (len > 14) 
                        fwrite(csymd->aux[0].fname, len+1, 1, info->f); 
                    break; 
                default: 
                    break; 
            } 
        } 
        yasm_xfree(name); 
    } 
    return 0; 
} 
 
static void 
coff_objfmt_output(yasm_object *object, FILE *f, int all_syms, 
                   yasm_errwarns *errwarns) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    coff_objfmt_output_info info; 
    unsigned char *localbuf; 
    long pos; 
    unsigned long symtab_pos; 
    unsigned long symtab_count; 
    unsigned int flags; 
    unsigned long ts; 
 
    if (objfmt_coff->proc_frame) { 
        yasm_error_set_xref(objfmt_coff->proc_frame, 
                            N_("procedure started here")); 
        yasm_error_set(YASM_ERROR_GENERAL, 
                       N_("end of file in procedure frame")); 
        yasm_errwarn_propagate(errwarns, 0); 
        return; 
    } 
 
    if (objfmt_coff->filesym_data->aux[0].fname) 
        yasm_xfree(objfmt_coff->filesym_data->aux[0].fname); 
    if (!object->deb_filename) {
        object->deb_filename = yasm_replace_path(
             objfmt_coff->objfmt.module->replace_map, objfmt_coff->objfmt.module->replace_map_size,
             object->src_filename, strlen(object->src_filename));
    }
    objfmt_coff->filesym_data->aux[0].fname = 
        yasm__xstrdup(object->deb_filename);
 
    /* Force all syms for win64 because they're needed for relocations. 
     * FIXME: Not *all* syms need to be output, only the ones needed for 
     * relocation.  Find a way to do that someday. 
     */ 
    all_syms |= objfmt_coff->win64; 
 
    info.strtab_offset = 4; 
    info.object = object; 
    info.objfmt_coff = objfmt_coff; 
    info.errwarns = errwarns; 
    info.f = f; 
    info.buf = yasm_xmalloc(REGULAR_OUTBUF_SIZE); 
 
    /* Allocate space for headers by seeking forward */ 
    if (fseek(f, (long)(20+40*(objfmt_coff->parse_scnum-1)), SEEK_SET) < 0) { 
        yasm__fatal(N_("could not seek on output file")); 
        /*@notreached@*/ 
        return; 
    } 
 
    /* Finalize symbol table (assign index to each symbol) */ 
    info.indx = 0; 
    info.all_syms = all_syms; 
    yasm_symtab_traverse(object->symtab, &info, coff_objfmt_count_sym); 
    symtab_count = info.indx; 
 
    /* Section data/relocs */ 
    if (COFF_SET_VMA) { 
        /* If we're setting the VMA, we need to do a first section pass to 
         * determine each section's addr value before actually outputting 
         * relocations, as a relocation's section address is added into the 
         * addends in the generated code. 
         */ 
        info.addr = 0; 
        if (yasm_object_sections_traverse(object, &info, 
                                          coff_objfmt_set_section_addr)) 
            return; 
    } 
    info.addr = 0; 
    if (yasm_object_sections_traverse(object, &info, 
                                      coff_objfmt_output_section)) 
        return; 
 
    /* Symbol table */ 
    pos = ftell(f); 
    if (pos == -1) { 
        yasm__fatal(N_("could not get file position on output file")); 
        /*@notreached@*/ 
        return; 
    } 
    symtab_pos = (unsigned long)pos; 
    yasm_symtab_traverse(object->symtab, &info, coff_objfmt_output_sym); 
 
    /* String table */ 
    yasm_fwrite_32_l(info.strtab_offset, f); /* total length */ 
    yasm_object_sections_traverse(object, &info, coff_objfmt_output_sectstr); 
    yasm_symtab_traverse(object->symtab, &info, coff_objfmt_output_str); 
 
    /* Write headers */ 
    if (fseek(f, 0, SEEK_SET) < 0) { 
        yasm__fatal(N_("could not seek on output file")); 
        /*@notreached@*/ 
        return; 
    } 
 
    localbuf = info.buf; 
    YASM_WRITE_16_L(localbuf, objfmt_coff->machine);    /* magic number */ 
    YASM_WRITE_16_L(localbuf, objfmt_coff->parse_scnum-1);/* number of sects */ 
    if (getenv("YASM_TEST_SUITE")) 
        ts = 0; 
    else 
        ts = (unsigned long)time(NULL); 
    YASM_WRITE_32_L(localbuf, ts);                      /* time/date stamp */ 
    YASM_WRITE_32_L(localbuf, symtab_pos);              /* file ptr to symtab */ 
    YASM_WRITE_32_L(localbuf, symtab_count);            /* number of symtabs */ 
    YASM_WRITE_16_L(localbuf, 0);       /* size of optional header (none) */ 
    /* flags */ 
    flags = 0; 
    if (strcmp(yasm_dbgfmt_keyword(object->dbgfmt), "null")==0) 
        flags = COFF_F_LNNO; 
    if (!all_syms) 
        flags |= COFF_F_LSYMS; 
    if (objfmt_coff->machine != COFF_MACHINE_AMD64) 
        flags |= COFF_F_AR32WR; 
    YASM_WRITE_16_L(localbuf, flags); 
    fwrite(info.buf, 20, 1, f); 
 
    yasm_object_sections_traverse(object, &info, coff_objfmt_output_secthead); 
 
    yasm_xfree(info.buf); 
} 
 
static void 
coff_objfmt_destroy(yasm_objfmt *objfmt) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)objfmt; 
    if (objfmt_coff->filesym_data->aux[0].fname) 
        yasm_xfree(objfmt_coff->filesym_data->aux[0].fname); 
    if (objfmt_coff->unwind) 
        yasm_win64__uwinfo_destroy(objfmt_coff->unwind); 
    yasm_xfree(objfmt); 
} 
 
static yasm_section * 
coff_objfmt_add_default_section(yasm_object *object) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    yasm_section *retval; 
    coff_section_data *csd; 
    int isnew; 
 
    retval = yasm_object_get_general(object, ".text", 16, 1, 0, &isnew, 0); 
    if (isnew) { 
        csd = yasm_section_get_data(retval, &coff_section_data_cb); 
        csd->flags = COFF_STYP_TEXT; 
        if (objfmt_coff->win32) 
            csd->flags |= COFF_STYP_EXECUTE | COFF_STYP_READ; 
        yasm_section_set_default(retval, 1); 
    } 
    return retval; 
} 
 
struct coff_section_switch_data { 
    int isdefault; 
    int gasflags; 
    unsigned long flags; 
    unsigned long flags2; 
    /*@only@*/ /*@null@*/ yasm_intnum *align_intn; 
}; 
 
/* GAS-style flags */ 
static int 
coff_helper_gasflags(void *obj, yasm_valparam *vp, unsigned long line, void *d, 
                     /*@unused@*/ uintptr_t arg) 
{ 
    struct coff_section_switch_data *data = 
        (struct coff_section_switch_data *)d; 
    int alloc = 0, load = 0, readonly = 0, code = 0, datasect = 0; 
    int shared = 0; 
    const char *s = yasm_vp_string(vp); 
    size_t i; 
 
    if (!s) { 
        yasm_error_set(YASM_ERROR_VALUE, N_("non-string section attribute")); 
        return -1; 
    } 
 
    /* For GAS, default to read/write data */ 
    if (data->isdefault) 
        data->flags = COFF_STYP_TEXT | COFF_STYP_READ | COFF_STYP_WRITE; 
 
    for (i=0; i<strlen(s); i++) { 
        switch (s[i]) { 
            case 'a': 
                break; 
            case 'b': 
                alloc = 1; 
                load = 0; 
                break; 
            case 'n': 
                load = 0; 
                break; 
            case 's': 
                shared = 1; 
                /*@fallthrough@*/ 
            case 'd': 
                datasect = 1; 
                load = 1; 
                readonly = 0; 
                break; 
            case 'x': 
                code = 1; 
                load = 1; 
                break; 
            case 'r': 
                datasect = 1; 
                load = 1; 
                readonly = 1; 
                break; 
            case 'w': 
                readonly = 0; 
                break; 
            default: 
                yasm_warn_set(YASM_WARN_GENERAL, 
                              N_("unrecognized section attribute: `%c'"), 
                              s[i]); 
        } 
    } 
 
    if (code) 
        data->flags = COFF_STYP_TEXT | COFF_STYP_EXECUTE | COFF_STYP_READ; 
    else if (datasect) 
        data->flags = COFF_STYP_DATA | COFF_STYP_READ | COFF_STYP_WRITE; 
    else if (readonly) 
        data->flags = COFF_STYP_DATA | COFF_STYP_READ; 
    else if (load) 
        data->flags = COFF_STYP_TEXT; 
    else if (alloc) 
        data->flags = COFF_STYP_BSS; 
 
    if (shared) 
        data->flags |= COFF_STYP_SHARED; 
 
    data->gasflags = 1; 
    return 0; 
} 
 
static /*@observer@*/ /*@null@*/ yasm_section * 
coff_objfmt_section_switch(yasm_object *object, yasm_valparamhead *valparams, 
                            /*@unused@*/ /*@null@*/ 
                            yasm_valparamhead *objext_valparams, 
                            unsigned long line) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    yasm_valparam *vp; 
    yasm_section *retval; 
    int isnew; 
    int iscode = 0; 
    int flags_override; 
    const char *sectname; 
    char *realname; 
    int resonly = 0; 
    unsigned long align = 0; 
    coff_section_data *csd; 
 
    struct coff_section_switch_data data; 
 
    static const yasm_dir_help help[] = { 
        { "code", 0, yasm_dir_helper_flag_set, 
          offsetof(struct coff_section_switch_data, flags), 
          COFF_STYP_TEXT | COFF_STYP_EXECUTE | COFF_STYP_READ }, 
        { "text", 0, yasm_dir_helper_flag_set, 
          offsetof(struct coff_section_switch_data, flags), 
          COFF_STYP_TEXT | COFF_STYP_EXECUTE | COFF_STYP_READ }, 
        { "data", 0, yasm_dir_helper_flag_set, 
          offsetof(struct coff_section_switch_data, flags), 
          COFF_STYP_DATA | COFF_STYP_READ | COFF_STYP_WRITE }, 
        { "rdata", 0, yasm_dir_helper_flag_set, 
          offsetof(struct coff_section_switch_data, flags), 
          COFF_STYP_DATA | COFF_STYP_READ }, 
        { "bss", 0, yasm_dir_helper_flag_set, 
          offsetof(struct coff_section_switch_data, flags), 
          COFF_STYP_BSS | COFF_STYP_READ | COFF_STYP_WRITE }, 
        { "info", 0, yasm_dir_helper_flag_set, 
          offsetof(struct coff_section_switch_data, flags), 
          COFF_STYP_INFO | COFF_STYP_DISCARD | COFF_STYP_READ }, 
        { "gasflags", 1, coff_helper_gasflags, 0, 0 }, 
        /* Win32 only below this point */ 
        { "discard", 0, yasm_dir_helper_flag_or, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_DISCARD}, 
        { "nodiscard", 0, yasm_dir_helper_flag_and, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_DISCARD}, 
        { "cache", 0, yasm_dir_helper_flag_and, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_NOCACHE}, 
        { "nocache", 0, yasm_dir_helper_flag_or, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_NOCACHE}, 
        { "page", 0, yasm_dir_helper_flag_and, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_NOPAGE }, 
        { "nopage", 0, yasm_dir_helper_flag_or, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_NOPAGE }, 
        { "share", 0, yasm_dir_helper_flag_or, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_SHARED }, 
        { "noshare", 0, yasm_dir_helper_flag_and, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_SHARED }, 
        { "execute", 0, yasm_dir_helper_flag_or, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_EXECUTE}, 
        { "noexecute", 0, yasm_dir_helper_flag_and, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_EXECUTE}, 
        { "read", 0, yasm_dir_helper_flag_or, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_READ }, 
        { "noread", 0, yasm_dir_helper_flag_and, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_READ }, 
        { "write", 0, yasm_dir_helper_flag_or, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_WRITE }, 
        { "nowrite", 0, yasm_dir_helper_flag_and, 
          offsetof(struct coff_section_switch_data, flags), COFF_STYP_WRITE }, 
        { "base", 0, yasm_dir_helper_flag_and, 
          offsetof(struct coff_section_switch_data, flags2), COFF_FLAG_NOBASE}, 
        { "nobase", 0, yasm_dir_helper_flag_or, 
          offsetof(struct coff_section_switch_data, flags2), COFF_FLAG_NOBASE}, 
        { "align", 1, yasm_dir_helper_intn, 
          offsetof(struct coff_section_switch_data, align_intn), 0 } 
    }; 
 
    vp = yasm_vps_first(valparams); 
    sectname = yasm_vp_string(vp); 
    if (!sectname) 
        return NULL; 
    vp = yasm_vps_next(vp); 
 
    data.isdefault = 0; 
    data.gasflags = 0; 
    data.flags = 0; 
    data.flags2 = 0; 
    data.align_intn = NULL; 
 
    if (strcmp(sectname, ".data") == 0) { 
        data.flags = COFF_STYP_DATA | COFF_STYP_READ | COFF_STYP_WRITE; 
        if (objfmt_coff->win32) { 
            if (objfmt_coff->machine == COFF_MACHINE_AMD64) 
                align = 16; 
            else 
                align = 4; 
        } 
    } else if (strcmp(sectname, ".bss") == 0) { 
        data.flags = COFF_STYP_BSS | COFF_STYP_READ | COFF_STYP_WRITE; 
        if (objfmt_coff->win32) { 
            if (objfmt_coff->machine == COFF_MACHINE_AMD64) 
                align = 16; 
            else 
                align = 4; 
        } 
        resonly = 1; 
    } else if (strcmp(sectname, ".text") == 0) { 
        data.flags = COFF_STYP_TEXT | COFF_STYP_EXECUTE | COFF_STYP_READ; 
        if (objfmt_coff->win32) 
            align = 16; 
    } else if (strcmp(sectname, ".rdata") == 0 
               || strncmp(sectname, ".rodata", 7) == 0 
               || strncmp(sectname, ".rdata$", 7) == 0) { 
        data.flags = COFF_STYP_DATA | COFF_STYP_READ; 
        if (objfmt_coff->win32) 
            align = 8; 
        else 
            yasm_warn_set(YASM_WARN_GENERAL, 
                N_("Standard COFF does not support read-only data sections")); 
    } else if (strcmp(sectname, ".drectve") == 0) { 
        data.flags = COFF_STYP_INFO; 
        if (objfmt_coff->win32) 
            data.flags |= COFF_STYP_DISCARD | COFF_STYP_READ; 
    } else if (objfmt_coff->win64 && strcmp(sectname, ".pdata") == 0) { 
        data.flags = COFF_STYP_DATA | COFF_STYP_READ; 
        align = 4; 
        data.flags2 = COFF_FLAG_NOBASE; 
    } else if (objfmt_coff->win64 && strcmp(sectname, ".xdata") == 0) { 
        data.flags = COFF_STYP_DATA | COFF_STYP_READ; 
        align = 8; 
        data.flags2 = COFF_FLAG_NOBASE; 
    } else if (objfmt_coff->win32 && strcmp(sectname, ".sxdata") == 0) { 
        data.flags = COFF_STYP_INFO; 
    } else if (strcmp(sectname, ".comment") == 0) { 
        data.flags = COFF_STYP_INFO | COFF_STYP_DISCARD | COFF_STYP_READ; 
    } else if (yasm__strncasecmp(sectname, ".debug", 6)==0) { 
        data.flags = COFF_STYP_DATA | COFF_STYP_DISCARD | COFF_STYP_READ; 
        align = 1; 
    } else { 
        /* Default to code, but set a flag so if we get gasflags we can 
         * change it (NASM and GAS have different defaults). 
         */ 
        data.isdefault = 1; 
        data.flags = COFF_STYP_TEXT | COFF_STYP_EXECUTE | COFF_STYP_READ; 
    } 
 
    flags_override = yasm_dir_helper(object, vp, line, help, 
                                     objfmt_coff->win32 ? NELEMS(help) : 7, 
                                     &data, yasm_dir_helper_valparam_warn); 
    if (flags_override < 0) 
        return NULL;    /* error occurred */ 
 
    if (data.flags & COFF_STYP_EXECUTE) 
        iscode = 1; 
 
    if (!objfmt_coff->win32) 
        data.flags &= ~COFF_STYP_WIN32_MASK; 
 
    if (data.align_intn) { 
        align = yasm_intnum_get_uint(data.align_intn); 
        yasm_intnum_destroy(data.align_intn); 
 
        /* Alignments must be a power of two. */ 
        if (!is_exp2(align)) { 
            yasm_error_set(YASM_ERROR_VALUE, 
                           N_("argument to `%s' is not a power of two"), 
                           "align"); 
            return NULL; 
        } 
 
        /* Check to see if alignment is supported size */ 
        if (align > 8192) { 
            yasm_error_set(YASM_ERROR_VALUE, 
                N_("Win32 does not support alignments > 8192")); 
            return NULL; 
        } 
    } 
 
    realname = yasm__xstrdup(sectname); 
    if (strlen(sectname) > 8 && !objfmt_coff->win32) { 
        /* win32 format supports >8 character section names in object 
         * files via "/nnnn" (where nnnn is decimal offset into string table), 
         * so only warn for regular COFF. 
         */ 
        yasm_warn_set(YASM_WARN_GENERAL, 
            N_("COFF section names limited to 8 characters: truncating")); 
        realname[8] = '\0'; 
    } 
 
    retval = yasm_object_get_general(object, realname, align, iscode, 
                                     resonly, &isnew, line); 
    yasm_xfree(realname); 
 
    csd = yasm_section_get_data(retval, &coff_section_data_cb); 
 
    if (isnew || yasm_section_is_default(retval)) { 
        yasm_section_set_default(retval, 0); 
        csd->flags = data.flags; 
        csd->flags2 = data.flags2; 
        yasm_section_set_align(retval, align, line); 
    } else if (flags_override && !data.gasflags) 
        yasm_warn_set(YASM_WARN_GENERAL, 
                      N_("section flags ignored on section redeclaration")); 
    return retval; 
} 
 
static /*@observer@*/ /*@null@*/ yasm_symrec * 
coff_objfmt_get_special_sym(yasm_object *object, const char *name, 
                            const char *parser) 
{ 
    return NULL; 
} 
 
static /*@observer@*/ /*@null@*/ yasm_symrec * 
win64_objfmt_get_special_sym(yasm_object *object, const char *name, 
                             const char *parser) 
{ 
    if (yasm__strcasecmp(name, "imagebase") == 0) { 
        yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
        return objfmt_coff->ssym_imagebase; 
    } 
    return NULL; 
} 
 
static void 
coff_section_data_destroy(void *data) 
{ 
    yasm_xfree(data); 
} 
 
static void 
coff_section_data_print(void *data, FILE *f, int indent_level) 
{ 
    coff_section_data *csd = (coff_section_data *)data; 
 
    fprintf(f, "%*ssym=\n", indent_level, ""); 
    yasm_symrec_print(csd->sym, f, indent_level+1); 
    fprintf(f, "%*sscnum=%d\n", indent_level, "", csd->scnum); 
    fprintf(f, "%*sflags=", indent_level, ""); 
    switch (csd->flags & COFF_STYP_STD_MASK) { 
        case COFF_STYP_TEXT: 
            fprintf(f, "TEXT"); 
            break; 
        case COFF_STYP_DATA: 
            fprintf(f, "DATA"); 
            break; 
        case COFF_STYP_BSS: 
            fprintf(f, "BSS"); 
            break; 
        default: 
            fprintf(f, "UNKNOWN"); 
            break; 
    } 
    fprintf(f, "\n%*saddr=0x%lx\n", indent_level, "", csd->addr); 
    fprintf(f, "%*sscnptr=0x%lx\n", indent_level, "", csd->scnptr); 
    fprintf(f, "%*ssize=%ld\n", indent_level, "", csd->size); 
    fprintf(f, "%*srelptr=0x%lx\n", indent_level, "", csd->relptr); 
    fprintf(f, "%*snreloc=%ld\n", indent_level, "", csd->nreloc); 
    fprintf(f, "%*srelocs:\n", indent_level, ""); 
} 
 
static void 
coff_symrec_data_destroy(void *data) 
{ 
    yasm_xfree(data); 
} 
 
static void 
coff_symrec_data_print(void *data, FILE *f, int indent_level) 
{ 
    coff_symrec_data *csd = (coff_symrec_data *)data; 
 
    fprintf(f, "%*ssymtab index=%lu\n", indent_level, "", csd->index); 
    fprintf(f, "%*ssclass=%d\n", indent_level, "", csd->sclass); 
} 
 
static void 
dir_export(yasm_object *object, yasm_valparamhead *valparams, 
           yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_valparam *vp; 
    /*@null@*/ const char *symname; 
    int isnew; 
    yasm_section *sect; 
    yasm_datavalhead dvs; 
 
    /* Reference exported symbol (to generate error if not declared) */ 
    vp = yasm_vps_first(valparams); 
    symname = yasm_vp_id(vp); 
    if (symname) 
        yasm_symtab_use(object->symtab, symname, line); 
    else { 
        yasm_error_set(YASM_ERROR_SYNTAX, 
                       N_("argument to EXPORT must be symbol name")); 
        return; 
    } 
 
    /* Add to end of linker directives */ 
    sect = yasm_object_get_general(object, ".drectve", 0, 0, 0, &isnew, line); 
 
    /* Initialize directive section if needed */ 
    if (isnew) { 
        coff_section_data *csd; 
        csd = yasm_section_get_data(sect, &coff_section_data_cb); 
        csd->flags = COFF_STYP_INFO | COFF_STYP_DISCARD | COFF_STYP_READ; 
    } 
 
    /* Add text as data bytecode */ 
    yasm_dvs_initialize(&dvs); 
    yasm_dvs_append(&dvs, yasm_dv_create_string(yasm__xstrdup("-export:"), 
                                                strlen("-export:"))); 
    yasm_dvs_append(&dvs, yasm_dv_create_string(yasm__xstrdup(symname), 
                                                strlen(symname))); 
    yasm_dvs_append(&dvs, yasm_dv_create_string(yasm__xstrdup(" "), 1)); 
    yasm_section_bcs_append(sect, yasm_bc_create_data(&dvs, 1, 0, NULL, line)); 
} 
 
static void 
dir_safeseh(yasm_object *object, yasm_valparamhead *valparams, 
            yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_valparam *vp; 
    /*@null@*/ const char *symname; 
    yasm_symrec *sym; 
    int isnew; 
    yasm_section *sect; 
 
    /* Reference symbol (to generate error if not declared). 
     * Also, symbol must be externally visible, so force it. 
     */ 
    vp = yasm_vps_first(valparams); 
    symname = yasm_vp_id(vp); 
    if (symname) { 
        coff_symrec_data *sym_data; 
        sym = yasm_symtab_use(object->symtab, symname, line); 
        sym_data = yasm_symrec_get_data(sym, &coff_symrec_data_cb); 
        if (!sym_data) { 
            sym_data = coff_objfmt_sym_set_data(sym, COFF_SCL_NULL, 0, 
                                                COFF_SYMTAB_AUX_NONE); 
        } 
        sym_data->forcevis = 1; 
        sym_data->type = 0x20; /* function */ 
    } else { 
        yasm_error_set(YASM_ERROR_SYNTAX, 
                       N_("argument to SAFESEH must be symbol name")); 
        return; 
    } 
 
    /* 
     * Add symbol number to end of .sxdata section. 
     */ 
 
    sect = yasm_object_get_general(object, ".sxdata", 0, 0, 0, &isnew, line); 
 
    /* Initialize sxdata section if needed */ 
    if (isnew) { 
        coff_section_data *csd; 
        csd = yasm_section_get_data(sect, &coff_section_data_cb); 
        csd->flags = COFF_STYP_INFO; 
    } 
 
    /* Add as sxdata bytecode */ 
    yasm_section_bcs_append(sect, 
                            yasm_bc_create_common(&win32_sxdata_bc_callback, 
                                                  sym, line)); 
} 
 
static void 
win32_sxdata_bc_destroy(void *contents) 
{ 
    /* Contents is just the symbol pointer, so no need to delete */ 
} 
 
static void 
win32_sxdata_bc_print(const void *contents, FILE *f, int indent_level) 
{ 
    /* TODO */ 
} 
 
static int 
win32_sxdata_bc_calc_len(yasm_bytecode *bc, yasm_bc_add_span_func add_span, 
                         void *add_span_data) 
{ 
    bc->len += 4; 
    return 0; 
} 
 
static int 
win32_sxdata_bc_tobytes(yasm_bytecode *bc, unsigned char **bufp, 
                        unsigned char *bufstart, void *d, 
                        yasm_output_value_func output_value, 
                        yasm_output_reloc_func output_reloc) 
{ 
    yasm_symrec *sym = (yasm_symrec *)bc->contents; 
    unsigned char *buf = *bufp; 
    coff_symrec_data *csymd; 
 
    csymd = yasm_symrec_get_data(sym, &coff_symrec_data_cb); 
    if (!csymd) 
        yasm_internal_error(N_("coff: no symbol data for SAFESEH symbol")); 
 
    YASM_WRITE_32_L(buf, csymd->index); 
 
    *bufp = buf; 
    return 0; 
} 
 
static void 
dir_ident(yasm_object *object, yasm_valparamhead *valparams, 
          yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    yasm_valparamhead sect_vps; 
    yasm_datavalhead dvs; 
    yasm_section *comment; 
    const char *sectname; 
    yasm_valparam *vp, *vp2; 
 
    /* Accept, but do nothing with empty ident */ 
    if (!valparams) 
        return; 
 
    vp = yasm_vps_first(valparams); 
    if (!vp) 
        return; 
 
    if (objfmt_coff->win32) { 
        /* Put ident data into .comment section for COFF, or .rdata$zzz 
         * to be compatible with the GNU linker, which doesn't ignore 
         * .comment (see binutils/gas/config/obj-coff.c:476-502). 
         */ 
        sectname = ".rdata$zzz"; 
    } else { 
        sectname = ".comment"; 
    } 
    yasm_vps_initialize(&sect_vps); 
    vp2 = yasm_vp_create_id(NULL, yasm__xstrdup(sectname), '\0'); 
    yasm_vps_append(&sect_vps, vp2); 
    comment = coff_objfmt_section_switch(object, &sect_vps, NULL, line); 
    yasm_vps_delete(&sect_vps); 
 
    /* To match GAS output, if the comment section is empty, put an 
     * initial 0 byte in the section. 
     */ 
    if (yasm_section_bcs_first(comment) == yasm_section_bcs_last(comment)) { 
        yasm_dvs_initialize(&dvs); 
        yasm_dvs_append(&dvs, yasm_dv_create_expr( 
            yasm_expr_create_ident(yasm_expr_int(yasm_intnum_create_uint(0)), 
                                   line))); 
        yasm_section_bcs_append(comment, 
            yasm_bc_create_data(&dvs, 1, 0, object->arch, line)); 
    } 
 
    yasm_dvs_initialize(&dvs); 
    do { 
        const char *s = yasm_vp_string(vp); 
        if (!s) { 
            yasm_error_set(YASM_ERROR_VALUE, 
                           N_(".comment requires string parameters")); 
            yasm_dvs_delete(&dvs); 
            return; 
        } 
        yasm_dvs_append(&dvs, 
                        yasm_dv_create_string(yasm__xstrdup(s), strlen(s))); 
    } while ((vp = yasm_vps_next(vp))); 
 
    yasm_section_bcs_append(comment, 
        yasm_bc_create_data(&dvs, 1, 1, object->arch, line)); 
} 
 
static void 
dir_secrel32(yasm_object *object, yasm_valparamhead *valparams, 
             yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_datavalhead dvs; 
    yasm_valparam *vp; 
 
    if (!object->cur_section) { 
        yasm_error_set(YASM_ERROR_SYNTAX, 
                       N_(".secrel32 can only be used inside of a section")); 
        return; 
    } 
 
    vp = yasm_vps_first(valparams); 
    yasm_dvs_initialize(&dvs); 
    do { 
        yasm_expr *e = yasm_vp_expr(vp, object->symtab, line); 
        yasm_dataval *dv; 
        if (!e) { 
            yasm_error_set(YASM_ERROR_VALUE, 
                           N_(".secrel32 requires expressions")); 
            yasm_dvs_delete(&dvs); 
            return; 
        } 
        dv = yasm_dv_create_expr(e); 
        yasm_dv_get_value(dv)->section_rel = 1; 
        yasm_dvs_append(&dvs, dv); 
    } while ((vp = yasm_vps_next(vp))); 
 
    yasm_section_bcs_append(object->cur_section, 
        yasm_bc_create_data(&dvs, 4, 0, object->arch, line)); 
} 
 
static void 
dir_def(yasm_object *object, yasm_valparamhead *valparams, 
        yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    yasm_valparam *vp; 
    const char *symname; 
    yasm_symrec *sym; 
    coff_symrec_data *sym_data; 
 
    if (objfmt_coff->def_sym) { 
        yasm_warn_set(YASM_WARN_GENERAL, 
                      N_(".def pseudo-op used inside of .def/.endef; ignored")); 
        return; 
    } 
 
    vp = yasm_vps_first(valparams); 
    symname = yasm_vp_id(vp); 
    if (!symname) { 
        yasm_error_set(YASM_ERROR_SYNTAX, 
                       N_("argument to SAFESEH must be symbol name")); 
        return; 
    } 
 
    sym = yasm_symtab_use(object->symtab, symname, line); 
    sym_data = yasm_symrec_get_data(sym, &coff_symrec_data_cb); 
    if (!sym_data) { 
        sym_data = coff_objfmt_sym_set_data(sym, COFF_SCL_NULL, 0, 
                                            COFF_SYMTAB_AUX_NONE); 
    } 
    objfmt_coff->def_sym = sym_data; 
} 
 
static void 
dir_scl(yasm_object *object, yasm_valparamhead *valparams, 
        yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    yasm_intnum *intn = NULL; 
 
    if (!objfmt_coff->def_sym) { 
        yasm_warn_set(YASM_WARN_GENERAL, 
                      N_("%s pseudo-op used outside of .def/.endef; ignored"), 
                      ".scl"); 
        return; 
    } 
 
    if (yasm_dir_helper_intn(object, yasm_vps_first(valparams), line, 
                             &intn, 0) < 0) 
        return; 
    if (!intn) 
        return; 
    objfmt_coff->def_sym->sclass = yasm_intnum_get_uint(intn); 
    yasm_intnum_destroy(intn); 
} 
 
static void 
dir_type(yasm_object *object, yasm_valparamhead *valparams, 
         yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    yasm_intnum *intn = NULL; 
 
    if (!objfmt_coff->def_sym) { 
        yasm_warn_set(YASM_WARN_GENERAL, 
                      N_("%s pseudo-op used outside of .def/.endef; ignored"), 
                      ".type"); 
        return; 
    } 
 
    if (yasm_dir_helper_intn(object, yasm_vps_first(valparams), line, 
                             &intn, 0) < 0) 
        return; 
    if (!intn) 
        return; 
    objfmt_coff->def_sym->type = yasm_intnum_get_uint(intn); 
    yasm_intnum_destroy(intn); 
} 
 
static void 
dir_endef(yasm_object *object, yasm_valparamhead *valparams, 
          yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    if (!objfmt_coff->def_sym) { 
        yasm_warn_set(YASM_WARN_GENERAL, 
                      N_(".endef pseudo-op used before .def; ignored")); 
        return; 
    } 
    objfmt_coff->def_sym = NULL; 
} 
 
static void 
dir_proc_frame(yasm_object *object, /*@null@*/ yasm_valparamhead *valparams, 
               yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    yasm_valparam *vp = yasm_vps_first(valparams); 
    const char *name = yasm_vp_id(vp); 
 
    if (objfmt_coff->proc_frame) { 
        yasm_error_set_xref(objfmt_coff->proc_frame, 
                            N_("previous procedure started here")); 
        yasm_error_set(YASM_ERROR_SYNTAX, 
            N_("nested procedures not supported (didn't use [ENDPROC_FRAME]?)")); 
        return; 
    } 
    objfmt_coff->proc_frame = line; 
    objfmt_coff->done_prolog = 0; 
    objfmt_coff->unwind = yasm_win64__uwinfo_create(); 
    objfmt_coff->unwind->proc = yasm_symtab_use(object->symtab, name, line); 
 
    /* Optional error handler */ 
    vp = yasm_vps_next(vp); 
    if (!vp || !(name = yasm_vp_id(vp))) 
        return; 
    objfmt_coff->unwind->ehandler = 
        yasm_symtab_use(object->symtab, name, line); 
} 
 
static int 
procframe_checkstate(yasm_objfmt_coff *objfmt_coff, const char *dirname) 
{ 
    if (!objfmt_coff->proc_frame) { 
        yasm_error_set(YASM_ERROR_SYNTAX, 
                       N_("[%s] without preceding [PROC_FRAME]"), dirname); 
        return 0; 
    } 
    if (objfmt_coff->done_prolog) { 
        yasm_error_set_xref(objfmt_coff->done_prolog, 
                            N_("prologue ended here")); 
        yasm_error_set(YASM_ERROR_SYNTAX, N_("[%s] after end of prologue"), 
                       dirname); 
        return 0; 
    } 
    if (!objfmt_coff->unwind) 
        yasm_internal_error(N_("unwind info not present")); 
    return 1; 
} 
 
/* Get current assembly position. 
 * XXX: There should be a better way to do this. 
 */ 
static yasm_symrec * 
get_curpos(yasm_object *object, const char *dirname, unsigned long line) 
{ 
    if (!object->cur_section) { 
        yasm_error_set(YASM_ERROR_SYNTAX, 
                       N_("[%s] can only be used inside of a section"), 
                       dirname); 
        return NULL; 
    } 
    return yasm_symtab_define_curpos(object->symtab, "$", 
        yasm_section_bcs_last(object->cur_section), line); 
} 
 
static void 
dir_pushreg(yasm_object *object, yasm_valparamhead *valparams, 
            yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    yasm_valparam *vp = yasm_vps_first(valparams); 
    coff_unwind_code *code; 
    const uintptr_t *reg; 
 
    if (!procframe_checkstate(objfmt_coff, "PUSHREG")) 
        return; 
 
    if (vp->type != YASM_PARAM_EXPR || 
        !(reg = yasm_expr_get_reg(&vp->param.e, 0))) { 
        yasm_error_set(YASM_ERROR_SYNTAX, 
                       N_("[%s] requires a register as the first parameter"), 
                       "PUSHREG"); 
        return; 
    } 
 
    /* Generate a PUSH_NONVOL unwind code. */ 
    code = yasm_xmalloc(sizeof(coff_unwind_code)); 
    code->proc = objfmt_coff->unwind->proc; 
    code->loc = get_curpos(object, "PUSHREG", line); 
    code->opcode = UWOP_PUSH_NONVOL; 
    code->info = (unsigned int)(*reg & 0xF); 
    yasm_value_initialize(&code->off, NULL, 0); 
    SLIST_INSERT_HEAD(&objfmt_coff->unwind->codes, code, link); 
} 
 
static void 
dir_setframe(yasm_object *object, yasm_valparamhead *valparams, 
             yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    yasm_valparam *vp = yasm_vps_first(valparams); 
    coff_unwind_code *code; 
    const uintptr_t *reg; 
    yasm_expr *off = NULL; 
 
    if (!procframe_checkstate(objfmt_coff, "SETFRAME")) 
        return; 
 
    if (vp->type != YASM_PARAM_EXPR || 
        !(reg = yasm_expr_get_reg(&vp->param.e, 0))) { 
        yasm_error_set(YASM_ERROR_SYNTAX, 
                       N_("[%s] requires a register as the first parameter"), 
                       "SETFRAME"); 
        return; 
    } 
 
    vp = yasm_vps_next(vp); 
    if (vp) 
        off = yasm_vp_expr(vp, object->symtab, line); 
 
    /* Set the frame fields in the unwind info */ 
    objfmt_coff->unwind->framereg = (unsigned long)(*reg); 
    yasm_value_initialize(&objfmt_coff->unwind->frameoff, off, 8); 
 
    /* Generate a SET_FPREG unwind code */ 
    code = yasm_xmalloc(sizeof(coff_unwind_code)); 
    code->proc = objfmt_coff->unwind->proc; 
    code->loc = get_curpos(object, "SETFRAME", line); 
    code->opcode = UWOP_SET_FPREG; 
    code->info = (unsigned int)(*reg & 0xF); 
    yasm_value_initialize(&code->off, off ? yasm_expr_copy(off) : NULL, 8); 
    SLIST_INSERT_HEAD(&objfmt_coff->unwind->codes, code, link); 
} 
 
static void 
dir_allocstack(yasm_object *object, yasm_valparamhead *valparams, 
               yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    yasm_valparam *vp = yasm_vps_first(valparams); 
    /*@null@*/ /*@only@*/ yasm_expr *size; 
    coff_unwind_code *code; 
 
    if (!procframe_checkstate(objfmt_coff, "ALLOCSTACK")) 
        return; 
 
    size = yasm_vp_expr(vp, object->symtab, line); 
    if (!size) { 
        yasm_error_set(YASM_ERROR_SYNTAX, N_("[%s] requires a size"), 
                       "ALLOCSTACK"); 
        return; 
    } 
 
    /* Generate an ALLOC_SMALL unwind code; this will get enlarged to an 
     * ALLOC_LARGE if necessary. 
     */ 
    code = yasm_xmalloc(sizeof(coff_unwind_code)); 
    code->proc = objfmt_coff->unwind->proc; 
    code->loc = get_curpos(object, "ALLOCSTACK", line); 
    code->opcode = UWOP_ALLOC_SMALL; 
    code->info = 0; 
    yasm_value_initialize(&code->off, size, 7); 
    SLIST_INSERT_HEAD(&objfmt_coff->unwind->codes, code, link); 
} 
 
static void 
dir_save_common(yasm_object *object, yasm_valparamhead *valparams, 
                unsigned long line, const char *name, int op) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    yasm_valparam *vp = yasm_vps_first(valparams); 
    coff_unwind_code *code; 
    const uintptr_t *reg; 
    /*@only@*/ /*@null@*/ yasm_expr *offset; 
 
    if (!procframe_checkstate(objfmt_coff, name)) 
        return; 
 
    if (vp->type != YASM_PARAM_EXPR || 
        !(reg = yasm_expr_get_reg(&vp->param.e, 0))) { 
        yasm_error_set(YASM_ERROR_SYNTAX, 
                       N_("[%s] requires a register as the first parameter"), 
                       name); 
        return; 
    } 
 
    vp = yasm_vps_next(vp); 
    offset = yasm_vp_expr(vp, object->symtab, line); 
    if (!offset) { 
        yasm_error_set(YASM_ERROR_SYNTAX, 
                       N_("[%s] requires an offset as the second parameter"), 
                       name); 
        return; 
    } 
 
    /* Generate a SAVE_XXX unwind code; this will get enlarged to a 
     * SAVE_XXX_FAR if necessary. 
     */ 
    code = yasm_xmalloc(sizeof(coff_unwind_code)); 
    code->proc = objfmt_coff->unwind->proc; 
    code->loc = get_curpos(object, name, line); 
    code->opcode = op; 
    code->info = (unsigned int)(*reg & 0xF); 
    yasm_value_initialize(&code->off, offset, 16); 
    SLIST_INSERT_HEAD(&objfmt_coff->unwind->codes, code, link); 
} 
 
static void 
dir_savereg(yasm_object *object, yasm_valparamhead *valparams, 
            yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    dir_save_common(object, valparams, line, "SAVEREG", UWOP_SAVE_NONVOL); 
} 
 
static void 
dir_savexmm128(yasm_object *object, yasm_valparamhead *valparams, 
               yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    dir_save_common(object, valparams, line, "SAVEXMM128", UWOP_SAVE_XMM128); 
} 
 
static void 
dir_pushframe(yasm_object *object, /*@null@*/ yasm_valparamhead *valparams, 
              yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    yasm_valparam *vp = yasm_vps_first(valparams); 
    coff_unwind_code *code; 
 
    if (!procframe_checkstate(objfmt_coff, "PUSHFRAME")) 
        return; 
 
    /* Generate a PUSH_MACHFRAME unwind code.  If there's any parameter, 
     * we set info to 1.  Otherwise we set info to 0. 
     */ 
    code = yasm_xmalloc(sizeof(coff_unwind_code)); 
    code->proc = objfmt_coff->unwind->proc; 
    code->loc = get_curpos(object, "PUSHFRAME", line); 
    code->opcode = UWOP_PUSH_MACHFRAME; 
    code->info = vp != NULL; 
    yasm_value_initialize(&code->off, NULL, 0); 
    SLIST_INSERT_HEAD(&objfmt_coff->unwind->codes, code, link); 
} 
 
static void 
dir_endprolog(yasm_object *object, /*@null@*/ yasm_valparamhead *valparams, 
              yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    if (!procframe_checkstate(objfmt_coff, "ENDPROLOG")) 
        return; 
    objfmt_coff->done_prolog = line; 
 
    objfmt_coff->unwind->prolog = get_curpos(object, "ENDPROLOG", line); 
} 
 
static void 
dir_endproc_frame(yasm_object *object, /*@null@*/ yasm_valparamhead *valparams, 
                  yasm_valparamhead *objext_valparams, unsigned long line) 
{ 
    yasm_objfmt_coff *objfmt_coff = (yasm_objfmt_coff *)object->objfmt; 
    yasm_section *sect; 
    coff_section_data *csd; 
    yasm_datavalhead dvs; 
    int isnew; 
    /*@dependent@*/ yasm_symrec *curpos, *unwindpos, *proc_sym, *xdata_sym; 
 
    if (!objfmt_coff->proc_frame) { 
        yasm_error_set(YASM_ERROR_SYNTAX, 
                       N_("[%s] without preceding [PROC_FRAME]"), 
                       "ENDPROC_FRAME"); 
        return; 
    } 
    if (!objfmt_coff->done_prolog) { 
        yasm_error_set_xref(objfmt_coff->proc_frame, 
                            N_("procedure started here")); 
        yasm_error_set(YASM_ERROR_SYNTAX, 
                       N_("ended procedure without ending prologue"), 
                       "ENDPROC_FRAME"); 
        objfmt_coff->proc_frame = 0; 
        yasm_win64__uwinfo_destroy(objfmt_coff->unwind); 
        objfmt_coff->unwind = NULL; 
        return; 
    } 
    if (!objfmt_coff->unwind) 
        yasm_internal_error(N_("unwind info not present")); 
 
    proc_sym = objfmt_coff->unwind->proc; 
 
    curpos = get_curpos(object, "ENDPROC_FRAME", line); 
 
    /* 
     * Add unwind info to end of .xdata section. 
     */ 
 
    sect = yasm_object_get_general(object, ".xdata", 0, 0, 0, &isnew, line); 
 
    /* Initialize xdata section if needed */ 
    if (isnew) { 
        csd = yasm_section_get_data(sect, &coff_section_data_cb); 
        csd->flags = COFF_STYP_DATA | COFF_STYP_READ; 
        yasm_section_set_align(sect, 8, line); 
    } 
 
    /* Get current position in .xdata section */ 
    unwindpos = yasm_symtab_define_curpos(object->symtab, "$", 
        yasm_section_bcs_last(sect), line); 
    /* Get symbol for .xdata as we'll want to reference it with WRT */ 
    csd = yasm_section_get_data(sect, &coff_section_data_cb); 
    xdata_sym = csd->sym; 
 
    /* Add unwind info.  Use line number of start of procedure. */ 
    yasm_win64__unwind_generate(sect, objfmt_coff->unwind, 
                                objfmt_coff->proc_frame); 
    objfmt_coff->unwind = NULL; /* generate keeps the unwind pointer */ 
 
    /* 
     * Add function lookup to end of .pdata section. 
     */ 
 
    sect = yasm_object_get_general(object, ".pdata", 0, 0, 0, &isnew, line); 
 
    /* Initialize pdata section if needed */ 
    if (isnew) { 
        csd = yasm_section_get_data(sect, &coff_section_data_cb); 
        csd->flags = COFF_STYP_DATA | COFF_STYP_READ; 
        csd->flags2 = COFF_FLAG_NOBASE; 
        yasm_section_set_align(sect, 4, line); 
    } 
 
    /* Add function structure as data bytecode */ 
    yasm_dvs_initialize(&dvs); 
    yasm_dvs_append(&dvs, yasm_dv_create_expr( 
        yasm_expr_create_ident(yasm_expr_sym(proc_sym), line))); 
    yasm_dvs_append(&dvs, yasm_dv_create_expr( 
        yasm_expr_create(YASM_EXPR_WRT, yasm_expr_sym(curpos), 
                         yasm_expr_sym(proc_sym), line))); 
    yasm_dvs_append(&dvs, yasm_dv_create_expr( 
        yasm_expr_create(YASM_EXPR_WRT, yasm_expr_sym(unwindpos), 
                         yasm_expr_sym(xdata_sym), line))); 
    yasm_section_bcs_append(sect, yasm_bc_create_data(&dvs, 4, 0, NULL, line)); 
 
    objfmt_coff->proc_frame = 0; 
    objfmt_coff->done_prolog = 0; 
} 
 
/* Define valid debug formats to use with this object format */ 
static const char *coff_objfmt_dbgfmt_keywords[] = { 
    "null", 
    "dwarf2", 
    NULL 
}; 
 
static const yasm_directive coff_objfmt_directives[] = { 
    { ".ident",         "gas",  dir_ident,      YASM_DIR_ANY }, 
    { "ident",          "nasm", dir_ident,      YASM_DIR_ANY }, 
    { ".def",           "gas",  dir_def,        YASM_DIR_ID_REQUIRED }, 
    { ".endef",         "gas",  dir_endef,      YASM_DIR_ANY }, 
    { ".scl",           "gas",  dir_scl,        YASM_DIR_ARG_REQUIRED }, 
    { ".type",          "gas",  dir_type,       YASM_DIR_ARG_REQUIRED }, 
    { ".secrel32",      "gas",  dir_secrel32,   YASM_DIR_ARG_REQUIRED }, 
    { NULL, NULL, NULL, 0 } 
}; 
 
/* Define objfmt structure -- see objfmt.h for details */ 
yasm_objfmt_module yasm_coff_LTX_objfmt = { 
    "COFF (DJGPP)", 
    "coff", 
    "o", 
    32, 
    0, 
    coff_objfmt_dbgfmt_keywords, 
    "null", 
    coff_objfmt_directives, 
    NULL,   /* no standard macros */ 
    coff_objfmt_create, 
    coff_objfmt_output, 
    coff_objfmt_destroy, 
    coff_objfmt_add_default_section, 
    coff_objfmt_init_new_section, 
    coff_objfmt_section_switch, 
    coff_objfmt_get_special_sym 
}; 
 
/* Define valid debug formats to use with this object format */ 
static const char *winXX_objfmt_dbgfmt_keywords[] = { 
    "null", 
    "dwarf2", 
    "cv8", 
    NULL 
}; 
 
static const yasm_directive win32_objfmt_directives[] = { 
    { ".ident",         "gas",  dir_ident,      YASM_DIR_ANY }, 
    { "ident",          "nasm", dir_ident,      YASM_DIR_ANY }, 
    { ".def",           "gas",  dir_def,        YASM_DIR_ID_REQUIRED }, 
    { ".endef",         "gas",  dir_endef,      YASM_DIR_ANY }, 
    { ".scl",           "gas",  dir_scl,        YASM_DIR_ARG_REQUIRED }, 
    { ".type",          "gas",  dir_type,       YASM_DIR_ARG_REQUIRED }, 
    { ".secrel32",      "gas",  dir_secrel32,   YASM_DIR_ARG_REQUIRED }, 
    { ".export",        "gas",  dir_export,     YASM_DIR_ID_REQUIRED }, 
    { "export",         "nasm", dir_export,     YASM_DIR_ID_REQUIRED }, 
    { ".safeseh",       "gas",  dir_safeseh,    YASM_DIR_ID_REQUIRED }, 
    { "safeseh",        "nasm", dir_safeseh,    YASM_DIR_ID_REQUIRED }, 
    { NULL, NULL, NULL, 0 } 
}; 
 
static const char *win32_nasm_stdmac[] = { 
    "%imacro export 1+.nolist", 
    "[export %1]", 
    "%endmacro", 
    "%imacro safeseh 1+.nolist", 
    "[safeseh %1]", 
    "%endmacro", 
    NULL 
}; 
 
static const yasm_stdmac win32_objfmt_stdmacs[] = { 
    { "nasm", "nasm", win32_nasm_stdmac }, 
    { NULL, NULL, NULL } 
}; 
 
/* Define objfmt structure -- see objfmt.h for details */ 
yasm_objfmt_module yasm_win32_LTX_objfmt = { 
    "Win32", 
    "win32", 
    "obj", 
    32, 
    1, 
    winXX_objfmt_dbgfmt_keywords, 
    "null", 
    win32_objfmt_directives, 
    win32_objfmt_stdmacs, 
    win32_objfmt_create, 
    coff_objfmt_output, 
    coff_objfmt_destroy, 
    coff_objfmt_add_default_section, 
    coff_objfmt_init_new_section, 
    coff_objfmt_section_switch, 
    coff_objfmt_get_special_sym 
}; 
 
static const yasm_directive win64_objfmt_directives[] = { 
    { ".ident",         "gas",  dir_ident,      YASM_DIR_ANY }, 
    { "ident",          "nasm", dir_ident,      YASM_DIR_ANY }, 
    { ".def",           "gas",  dir_def,        YASM_DIR_ID_REQUIRED }, 
    { ".endef",         "gas",  dir_endef,      YASM_DIR_ANY }, 
    { ".scl",           "gas",  dir_scl,        YASM_DIR_ARG_REQUIRED }, 
    { ".type",          "gas",  dir_type,       YASM_DIR_ARG_REQUIRED }, 
    { ".secrel32",      "gas",  dir_secrel32,   YASM_DIR_ARG_REQUIRED }, 
    { ".export",        "gas",  dir_export,     YASM_DIR_ID_REQUIRED }, 
    { "export",         "nasm", dir_export,     YASM_DIR_ID_REQUIRED }, 
    { ".proc_frame",    "gas",  dir_proc_frame, YASM_DIR_ID_REQUIRED }, 
    { "proc_frame",     "nasm", dir_proc_frame, YASM_DIR_ID_REQUIRED }, 
    { ".pushreg",       "gas",  dir_pushreg,    YASM_DIR_ARG_REQUIRED }, 
    { "pushreg",        "nasm", dir_pushreg,    YASM_DIR_ARG_REQUIRED }, 
    { ".setframe",      "gas",  dir_setframe,   YASM_DIR_ARG_REQUIRED }, 
    { "setframe",       "nasm", dir_setframe,   YASM_DIR_ARG_REQUIRED }, 
    { ".allocstack",    "gas",  dir_allocstack, YASM_DIR_ARG_REQUIRED }, 
    { "allocstack",     "nasm", dir_allocstack, YASM_DIR_ARG_REQUIRED }, 
    { ".savereg",       "gas",  dir_savereg,    YASM_DIR_ARG_REQUIRED }, 
    { "savereg",        "nasm", dir_savereg,    YASM_DIR_ARG_REQUIRED }, 
    { ".savexmm128",    "gas",  dir_savexmm128, YASM_DIR_ARG_REQUIRED }, 
    { "savexmm128",     "nasm", dir_savexmm128, YASM_DIR_ARG_REQUIRED }, 
    { ".pushframe",     "gas",  dir_pushframe,  YASM_DIR_ANY }, 
    { "pushframe",      "nasm", dir_pushframe,  YASM_DIR_ANY }, 
    { ".endprolog",     "gas",  dir_endprolog,  YASM_DIR_ANY }, 
    { "endprolog",      "nasm", dir_endprolog,  YASM_DIR_ANY }, 
    { ".endproc_frame", "gas",  dir_endproc_frame, YASM_DIR_ANY }, 
    { "endproc_frame",  "nasm", dir_endproc_frame, YASM_DIR_ANY }, 
    { NULL, NULL, NULL, 0 } 
}; 
 
#include "win64-nasm.c" 
#include "win64-gas.c" 
 
static const yasm_stdmac win64_objfmt_stdmacs[] = { 
    { "nasm", "nasm", win64_nasm_stdmac }, 
    { "gas", "nasm", win64_gas_stdmac }, 
    { NULL, NULL, NULL } 
}; 
 
/* Define objfmt structure -- see objfmt.h for details */ 
yasm_objfmt_module yasm_win64_LTX_objfmt = { 
    "Win64", 
    "win64", 
    "obj", 
    64, 
    1, 
    winXX_objfmt_dbgfmt_keywords, 
    "null", 
    win64_objfmt_directives, 
    win64_objfmt_stdmacs, 
    win64_objfmt_create, 
    coff_objfmt_output, 
    coff_objfmt_destroy, 
    coff_objfmt_add_default_section, 
    coff_objfmt_init_new_section, 
    coff_objfmt_section_switch, 
    win64_objfmt_get_special_sym 
}; 
yasm_objfmt_module yasm_x64_LTX_objfmt = { 
    "Win64", 
    "x64", 
    "obj", 
    64, 
    1, 
    winXX_objfmt_dbgfmt_keywords, 
    "null", 
    win64_objfmt_directives, 
    win64_objfmt_stdmacs, 
    win64_objfmt_create, 
    coff_objfmt_output, 
    coff_objfmt_destroy, 
    coff_objfmt_add_default_section, 
    coff_objfmt_init_new_section, 
    coff_objfmt_section_switch, 
    win64_objfmt_get_special_sym 
};