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/*
* Extended Dynamic Object format
*
* Copyright (C) 2004-2007 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 <libyasm.h>
#define REGULAR_OUTBUF_SIZE 1024
#define XDF_MAGIC 0x87654322
#define XDF_SYM_EXTERN 1
#define XDF_SYM_GLOBAL 2
#define XDF_SYM_EQU 4
typedef struct xdf_reloc {
yasm_reloc reloc;
/*@null@*/ yasm_symrec *base; /* base symbol (for WRT) */
enum {
XDF_RELOC_REL = 1, /* relative to segment */
XDF_RELOC_WRT = 2, /* relative to symbol */
XDF_RELOC_RIP = 4, /* RIP-relative */
XDF_RELOC_SEG = 8 /* segment containing symbol */
} type; /* type of relocation */
enum {
XDF_RELOC_8 = 1,
XDF_RELOC_16 = 2,
XDF_RELOC_32 = 4,
XDF_RELOC_64 = 8
} size; /* size of relocation */
unsigned int shift; /* relocation shift (0,4,8,16,24,32) */
} xdf_reloc;
typedef struct xdf_section_data {
/*@dependent@*/ yasm_symrec *sym; /* symbol created for this section */
yasm_intnum *addr; /* starting memory address */
yasm_intnum *vaddr; /* starting virtual address */
long scnum; /* section number (0=first section) */
enum {
XDF_SECT_ABSOLUTE = 0x01,
XDF_SECT_FLAT = 0x02,
XDF_SECT_BSS = 0x04,
XDF_SECT_EQU = 0x08,
XDF_SECT_USE_16 = 0x10,
XDF_SECT_USE_32 = 0x20,
XDF_SECT_USE_64 = 0x40
} flags; /* section flags */
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 */
} xdf_section_data;
typedef struct xdf_symrec_data {
unsigned long index; /* assigned XDF symbol table index */
} xdf_symrec_data;
typedef struct yasm_objfmt_xdf {
yasm_objfmt_base objfmt; /* base structure */
long parse_scnum; /* sect numbering in parser */
} yasm_objfmt_xdf;
typedef struct xdf_objfmt_output_info {
yasm_object *object;
yasm_objfmt_xdf *objfmt_xdf;
yasm_errwarns *errwarns;
/*@dependent@*/ FILE *f;
/*@only@*/ unsigned char *buf;
yasm_section *sect;
/*@dependent@*/ xdf_section_data *xsd;
unsigned long indx; /* current symbol index */
int all_syms; /* outputting all symbols? */
unsigned long strtab_offset; /* current string table offset */
} xdf_objfmt_output_info;
static void xdf_section_data_destroy(/*@only@*/ void *d);
static void xdf_section_data_print(void *data, FILE *f, int indent_level);
static const yasm_assoc_data_callback xdf_section_data_cb = {
xdf_section_data_destroy,
xdf_section_data_print
};
static void xdf_symrec_data_destroy(/*@only@*/ void *d);
static void xdf_symrec_data_print(void *data, FILE *f, int indent_level);
static const yasm_assoc_data_callback xdf_symrec_data_cb = {
xdf_symrec_data_destroy,
xdf_symrec_data_print
};
yasm_objfmt_module yasm_xdf_LTX_objfmt;
static yasm_objfmt *
xdf_objfmt_create(yasm_object *object)
{
yasm_objfmt_xdf *objfmt_xdf = yasm_xmalloc(sizeof(yasm_objfmt_xdf));
/* Only support x86 arch */
if (yasm__strcasecmp(yasm_arch_keyword(object->arch), "x86") != 0) {
yasm_xfree(objfmt_xdf);
return NULL;
}
/* Support x86 and amd64 machines of x86 arch */
if (yasm__strcasecmp(yasm_arch_get_machine(object->arch), "x86") &&
yasm__strcasecmp(yasm_arch_get_machine(object->arch), "amd64")) {
yasm_xfree(objfmt_xdf);
return NULL;
}
objfmt_xdf->parse_scnum = 0; /* section numbering starts at 0 */
objfmt_xdf->objfmt.module = &yasm_xdf_LTX_objfmt;
return (yasm_objfmt *)objfmt_xdf;
}
static int
xdf_objfmt_output_value(yasm_value *value, unsigned char *buf,
unsigned int destsize, unsigned long offset,
yasm_bytecode *bc, int warn, /*@null@*/ void *d)
{
/*@null@*/ xdf_objfmt_output_info *info = (xdf_objfmt_output_info *)d;
/*@dependent@*/ /*@null@*/ yasm_intnum *intn;
unsigned long intn_minus;
int retval;
unsigned int valsize = value->size;
assert(info != NULL);
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;
}
if (value->section_rel) {
yasm_error_set(YASM_ERROR_TOO_COMPLEX,
N_("xdf: relocation too complex"));
return 1;
}
intn_minus = 0;
if (value->rel) {
xdf_reloc *reloc;
reloc = yasm_xmalloc(sizeof(xdf_reloc));
reloc->reloc.addr = yasm_intnum_create_uint(bc->offset + offset);
reloc->reloc.sym = value->rel;
reloc->base = NULL;
reloc->size = valsize/8;
reloc->shift = value->rshift;
if (value->seg_of)
reloc->type = XDF_RELOC_SEG;
else if (value->wrt) {
reloc->base = value->wrt;
reloc->type = XDF_RELOC_WRT;
} else if (value->curpos_rel) {
reloc->type = XDF_RELOC_RIP;
/* Adjust to start of section, so subtract out the bytecode
* offset.
*/
intn_minus = bc->offset;
} else
reloc->type = XDF_RELOC_REL;
info->xsd->nreloc++;
yasm_section_add_reloc(info->sect, (yasm_reloc *)reloc, yasm_xfree);
}
if (intn_minus > 0) {
intn = yasm_intnum_create_uint(intn_minus);
yasm_intnum_calc(intn, YASM_EXPR_NEG, NULL);
} else
intn = yasm_intnum_create_uint(0);
if (value->abs) {
yasm_intnum *intn2 = yasm_expr_get_intnum(&value->abs, 0);
if (!intn2) {
yasm_error_set(YASM_ERROR_TOO_COMPLEX,
N_("xdf: relocation too complex"));
yasm_intnum_destroy(intn);
return 1;
}
yasm_intnum_calc(intn, YASM_EXPR_ADD, intn2);
}
retval = yasm_arch_intnum_tobytes(info->object->arch, intn, buf, destsize,
valsize, 0, bc, warn);
yasm_intnum_destroy(intn);
return retval;
}
static int
xdf_objfmt_output_bytecode(yasm_bytecode *bc, /*@null@*/ void *d)
{
/*@null@*/ xdf_objfmt_output_info *info = (xdf_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,
xdf_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->xsd->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: 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
xdf_objfmt_output_section(yasm_section *sect, /*@null@*/ void *d)
{
/*@null@*/ xdf_objfmt_output_info *info = (xdf_objfmt_output_info *)d;
/*@dependent@*/ /*@null@*/ xdf_section_data *xsd;
long pos;
xdf_reloc *reloc;
assert(info != NULL);
xsd = yasm_section_get_data(sect, &xdf_section_data_cb);
assert(xsd != NULL);
if (xsd->flags & XDF_SECT_BSS) {
/* Don't output BSS sections.
* TODO: Check for non-reserve bytecodes?
*/
pos = 0; /* position = 0 because it's not in the file */
xsd->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->xsd = xsd;
yasm_section_bcs_traverse(sect, info->errwarns, info,
xdf_objfmt_output_bytecode);
/* Sanity check final section size */
if (xsd->size != yasm_bc_next_offset(yasm_section_bcs_last(sect)))
yasm_internal_error(
N_("xdf: section computed size did not match actual size"));
}
/* Empty? Go on to next section */
if (xsd->size == 0)
return 0;
xsd->scnptr = (unsigned long)pos;
/* No relocations to output? Go on to next section */
if (xsd->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;
}
xsd->relptr = (unsigned long)pos;
reloc = (xdf_reloc *)yasm_section_relocs_first(sect);
while (reloc) {
unsigned char *localbuf = info->buf;
/*@null@*/ xdf_symrec_data *xsymd;
xsymd = yasm_symrec_get_data(reloc->reloc.sym, &xdf_symrec_data_cb);
if (!xsymd)
yasm_internal_error(
N_("xdf: 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, xsymd->index); /* relocated symbol */
if (reloc->base) {
xsymd = yasm_symrec_get_data(reloc->base, &xdf_symrec_data_cb);
if (!xsymd)
yasm_internal_error(
N_("xdf: no symbol data for relocated base symbol"));
YASM_WRITE_32_L(localbuf, xsymd->index); /* base symbol */
} else {
if (reloc->type == XDF_RELOC_WRT)
yasm_internal_error(
N_("xdf: no base symbol for WRT relocation"));
YASM_WRITE_32_L(localbuf, 0); /* no base symbol */
}
YASM_WRITE_8(localbuf, reloc->type); /* type of relocation */
YASM_WRITE_8(localbuf, reloc->size); /* size of relocation */
YASM_WRITE_8(localbuf, reloc->shift); /* relocation shift */
YASM_WRITE_8(localbuf, 0); /* flags */
fwrite(info->buf, 16, 1, info->f);
reloc = (xdf_reloc *)yasm_section_reloc_next((yasm_reloc *)reloc);
}
return 0;
}
static int
xdf_objfmt_output_secthead(yasm_section *sect, /*@null@*/ void *d)
{
/*@null@*/ xdf_objfmt_output_info *info = (xdf_objfmt_output_info *)d;
/*@dependent@*/ /*@null@*/ xdf_section_data *xsd;
/*@null@*/ xdf_symrec_data *xsymd;
unsigned char *localbuf;
assert(info != NULL);
xsd = yasm_section_get_data(sect, &xdf_section_data_cb);
assert(xsd != NULL);
localbuf = info->buf;
xsymd = yasm_symrec_get_data(xsd->sym, &xdf_symrec_data_cb);
assert(xsymd != NULL);
YASM_WRITE_32_L(localbuf, xsymd->index); /* section name symbol */
if (xsd->addr) {
yasm_intnum_get_sized(xsd->addr, localbuf, 8, 64, 0, 0, 0);
localbuf += 8; /* physical address */
} else {
YASM_WRITE_32_L(localbuf, 0);
YASM_WRITE_32_L(localbuf, 0);
}
if (xsd->vaddr) {
yasm_intnum_get_sized(xsd->vaddr, localbuf, 8, 64, 0, 0, 0);
localbuf += 8; /* virtual address */
} else if (xsd->addr) {
yasm_intnum_get_sized(xsd->addr, localbuf, 8, 64, 0, 0, 0);
localbuf += 8; /* VA=PA */
} else {
YASM_WRITE_32_L(localbuf, 0);
YASM_WRITE_32_L(localbuf, 0);
}
YASM_WRITE_16_L(localbuf, yasm_section_get_align(sect)); /* alignment */
YASM_WRITE_16_L(localbuf, xsd->flags); /* flags */
YASM_WRITE_32_L(localbuf, xsd->scnptr); /* file ptr to data */
YASM_WRITE_32_L(localbuf, xsd->size); /* section size */
YASM_WRITE_32_L(localbuf, xsd->relptr); /* file ptr to relocs */
YASM_WRITE_32_L(localbuf, xsd->nreloc); /* num of relocation entries */
fwrite(info->buf, 40, 1, info->f);
return 0;
}
static int
xdf_objfmt_count_sym(yasm_symrec *sym, /*@null@*/ void *d)
{
/*@null@*/ xdf_objfmt_output_info *info = (xdf_objfmt_output_info *)d;
yasm_sym_vis vis = yasm_symrec_get_visibility(sym);
assert(info != NULL);
if (vis & YASM_SYM_COMMON) {
yasm_error_set(YASM_ERROR_GENERAL,
N_("XDF object format does not support common variables"));
yasm_errwarn_propagate(info->errwarns, yasm_symrec_get_decl_line(sym));
return 0;
}
if (info->all_syms ||
(vis != YASM_SYM_LOCAL && !(vis & YASM_SYM_DLOCAL))) {
/* Save index in symrec data */
xdf_symrec_data *sym_data = yasm_xmalloc(sizeof(xdf_symrec_data));
sym_data->index = info->indx;
yasm_symrec_add_data(sym, &xdf_symrec_data_cb, sym_data);
info->indx++;
}
return 0;
}
static int
xdf_objfmt_output_sym(yasm_symrec *sym, /*@null@*/ void *d)
{
/*@null@*/ xdf_objfmt_output_info *info = (xdf_objfmt_output_info *)d;
yasm_sym_vis vis = yasm_symrec_get_visibility(sym);
assert(info != NULL);
if (info->all_syms || vis != YASM_SYM_LOCAL) {
/*@only@*/ char *name = yasm_symrec_get_global_name(sym, info->object);
const yasm_expr *equ_val;
const yasm_intnum *intn;
size_t len = strlen(name);
unsigned long value = 0;
long scnum = -3; /* -3 = debugging symbol */
/*@dependent@*/ /*@null@*/ yasm_section *sect;
/*@dependent@*/ /*@null@*/ yasm_bytecode *precbc;
unsigned long flags = 0;
unsigned char *localbuf;
if (vis & YASM_SYM_GLOBAL)
flags = XDF_SYM_GLOBAL;
/* 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@*/ xdf_section_data *csectd;
csectd = yasm_section_get_data(sect, &xdf_section_data_cb);
if (csectd)
scnum = csectd->scnum;
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);
flags |= XDF_SYM_EQU;
scnum = -2; /* -2 = absolute symbol */
} else {
if (vis & YASM_SYM_EXTERN) {
flags = XDF_SYM_EXTERN;
scnum = -1;
}
}
localbuf = info->buf;
YASM_WRITE_32_L(localbuf, scnum); /* section number */
YASM_WRITE_32_L(localbuf, value); /* value */
YASM_WRITE_32_L(localbuf, info->strtab_offset);
info->strtab_offset += (unsigned long)(len+1);
YASM_WRITE_32_L(localbuf, flags); /* flags */
fwrite(info->buf, 16, 1, info->f);
yasm_xfree(name);
}
return 0;
}
static int
xdf_objfmt_output_str(yasm_symrec *sym, /*@null@*/ void *d)
{
/*@null@*/ xdf_objfmt_output_info *info = (xdf_objfmt_output_info *)d;
yasm_sym_vis vis = yasm_symrec_get_visibility(sym);
assert(info != NULL);
if (info->all_syms || vis != YASM_SYM_LOCAL) {
/*@only@*/ char *name = yasm_symrec_get_global_name(sym, info->object);
size_t len = strlen(name);
fwrite(name, len+1, 1, info->f);
yasm_xfree(name);
}
return 0;
}
static void
xdf_objfmt_output(yasm_object *object, FILE *f, int all_syms,
yasm_errwarns *errwarns)
{
yasm_objfmt_xdf *objfmt_xdf = (yasm_objfmt_xdf *)object->objfmt;
xdf_objfmt_output_info info;
unsigned char *localbuf;
unsigned long symtab_count = 0;
info.object = object;
info.objfmt_xdf = objfmt_xdf;
info.errwarns = errwarns;
info.f = f;
info.buf = yasm_xmalloc(REGULAR_OUTBUF_SIZE);
/* Allocate space for headers by seeking forward */
if (fseek(f, (long)(16+40*(objfmt_xdf->parse_scnum)), SEEK_SET) < 0) {
yasm__fatal(N_("could not seek on output file"));
/*@notreached@*/
return;
}
/* Get number of symbols */
info.indx = 0;
info.all_syms = 1; /* force all syms into symbol table */
yasm_symtab_traverse(object->symtab, &info, xdf_objfmt_count_sym);
symtab_count = info.indx;
/* Get file offset of start of string table */
info.strtab_offset = 16+40*(objfmt_xdf->parse_scnum)+16*symtab_count;
/* Output symbol table */
yasm_symtab_traverse(object->symtab, &info, xdf_objfmt_output_sym);
/* Output string table */
yasm_symtab_traverse(object->symtab, &info, xdf_objfmt_output_str);
/* Section data/relocs */
if (yasm_object_sections_traverse(object, &info,
xdf_objfmt_output_section))
return;
/* 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_32_L(localbuf, XDF_MAGIC); /* magic number */
YASM_WRITE_32_L(localbuf, objfmt_xdf->parse_scnum); /* number of sects */
YASM_WRITE_32_L(localbuf, symtab_count); /* number of symtabs */
/* size of sect headers + symbol table + strings */
YASM_WRITE_32_L(localbuf, info.strtab_offset-16);
fwrite(info.buf, 16, 1, f);
yasm_object_sections_traverse(object, &info, xdf_objfmt_output_secthead);
yasm_xfree(info.buf);
}
static void
xdf_objfmt_destroy(yasm_objfmt *objfmt)
{
yasm_xfree(objfmt);
}
static void
xdf_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_xdf *objfmt_xdf = (yasm_objfmt_xdf *)object->objfmt;
xdf_section_data *data;
yasm_symrec *sym;
data = yasm_xmalloc(sizeof(xdf_section_data));
data->scnum = objfmt_xdf->parse_scnum++;
data->flags = 0;
data->addr = NULL;
data->vaddr = NULL;
data->scnptr = 0;
data->size = 0;
data->relptr = 0;
data->nreloc = 0;
yasm_section_add_data(sect, &xdf_section_data_cb, data);
sym = yasm_symtab_define_label(object->symtab, sectname,
yasm_section_bcs_first(sect), 1, line);
data->sym = sym;
}
static yasm_section *
xdf_objfmt_add_default_section(yasm_object *object)
{
yasm_section *retval;
int isnew;
retval = yasm_object_get_general(object, ".text", 0, 1, 0, &isnew, 0);
if (isnew)
yasm_section_set_default(retval, 1);
return retval;
}
static int
xdf_helper_use(void *obj, yasm_valparam *vp, unsigned long line, void *d,
uintptr_t bits)
{
yasm_object *object = (yasm_object *)obj;
unsigned long *flags = (unsigned long *)d;
*flags &= ~(XDF_SECT_USE_16|XDF_SECT_USE_32|XDF_SECT_USE_64);
switch (bits) {
case 16: *flags |= XDF_SECT_USE_16; break;
case 32: *flags |= XDF_SECT_USE_32; break;
case 64: *flags |= XDF_SECT_USE_64; break;
};
yasm_arch_set_var(object->arch, "mode_bits", bits);
return 0;
}
static /*@observer@*/ /*@null@*/ yasm_section *
xdf_objfmt_section_switch(yasm_object *object, yasm_valparamhead *valparams,
/*@unused@*/ /*@null@*/
yasm_valparamhead *objext_valparams,
unsigned long line)
{
yasm_valparam *vp;
yasm_section *retval;
int isnew;
int flags_override = 0;
const char *sectname;
int resonly = 0;
xdf_section_data *xsd;
unsigned long align = 0;
struct xdf_section_switch_data {
/*@only@*/ /*@null@*/ yasm_intnum *absaddr;
/*@only@*/ /*@null@*/ yasm_intnum *vaddr;
/*@only@*/ /*@null@*/ yasm_intnum *align_intn;
unsigned long flags;
} data;
static const yasm_dir_help help[] = {
{ "use16", 0, xdf_helper_use,
offsetof(struct xdf_section_switch_data, flags), 16 },
{ "use32", 0, xdf_helper_use,
offsetof(struct xdf_section_switch_data, flags), 32 },
{ "use64", 0, xdf_helper_use,
offsetof(struct xdf_section_switch_data, flags), 64 },
{ "bss", 0, yasm_dir_helper_flag_or,
offsetof(struct xdf_section_switch_data, flags), XDF_SECT_BSS },
{ "flat", 0, yasm_dir_helper_flag_or,
offsetof(struct xdf_section_switch_data, flags), XDF_SECT_FLAT },
{ "absolute", 1, yasm_dir_helper_intn,
offsetof(struct xdf_section_switch_data, absaddr), 0 },
{ "virtual", 1, yasm_dir_helper_intn,
offsetof(struct xdf_section_switch_data, vaddr), 0 },
{ "align", 1, yasm_dir_helper_intn,
offsetof(struct xdf_section_switch_data, align_intn), 0 }
};
data.absaddr = NULL;
data.vaddr = NULL;
data.align_intn = NULL;
data.flags = 0;
vp = yasm_vps_first(valparams);
sectname = yasm_vp_string(vp);
if (!sectname)
return NULL;
vp = yasm_vps_next(vp);
flags_override = yasm_dir_helper(object, vp, line, help, NELEMS(help),
&data, yasm_dir_helper_valparam_warn);
if (flags_override < 0)
return NULL; /* error occurred */
if (data.absaddr)
data.flags |= XDF_SECT_ABSOLUTE;
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");
if (data.vaddr)
yasm_intnum_destroy(data.vaddr);
if (data.absaddr)
yasm_intnum_destroy(data.absaddr);
return NULL;
}
/* Check to see if alignment is supported size */
if (align > 4096) {
yasm_error_set(YASM_ERROR_VALUE,
N_("XDF does not support alignments > 4096"));
if (data.vaddr)
yasm_intnum_destroy(data.vaddr);
if (data.absaddr)
yasm_intnum_destroy(data.absaddr);
return NULL;
}
}
retval = yasm_object_get_general(object, sectname, align, 1, resonly,
&isnew, line);
xsd = yasm_section_get_data(retval, &xdf_section_data_cb);
if (isnew || yasm_section_is_default(retval)) {
yasm_section_set_default(retval, 0);
xsd->flags = data.flags;
if (data.absaddr) {
if (xsd->addr)
yasm_intnum_destroy(xsd->addr);
xsd->addr = data.absaddr;
}
if (data.vaddr) {
if (xsd->vaddr)
yasm_intnum_destroy(xsd->vaddr);
xsd->vaddr = data.vaddr;
}
yasm_section_set_align(retval, align, line);
} else if (flags_override)
yasm_warn_set(YASM_WARN_GENERAL,
N_("section flags ignored on section redeclaration"));
return retval;
}
static /*@observer@*/ /*@null@*/ yasm_symrec *
xdf_objfmt_get_special_sym(yasm_object *object, const char *name,
const char *parser)
{
return NULL;
}
static void
xdf_section_data_destroy(void *data)
{
xdf_section_data *xsd = (xdf_section_data *)data;
if (xsd->addr)
yasm_intnum_destroy(xsd->addr);
if (xsd->vaddr)
yasm_intnum_destroy(xsd->vaddr);
yasm_xfree(data);
}
static void
xdf_section_data_print(void *data, FILE *f, int indent_level)
{
xdf_section_data *xsd = (xdf_section_data *)data;
fprintf(f, "%*ssym=\n", indent_level, "");
yasm_symrec_print(xsd->sym, f, indent_level+1);
fprintf(f, "%*sscnum=%ld\n", indent_level, "", xsd->scnum);
fprintf(f, "%*sflags=0x%x\n", indent_level, "", xsd->flags);
fprintf(f, "%*saddr=", indent_level, "");
yasm_intnum_print(xsd->addr, f);
fprintf(f, "%*svaddr=", indent_level, "");
yasm_intnum_print(xsd->vaddr, f);
fprintf(f, "%*sscnptr=0x%lx\n", indent_level, "", xsd->scnptr);
fprintf(f, "%*ssize=%ld\n", indent_level, "", xsd->size);
fprintf(f, "%*srelptr=0x%lx\n", indent_level, "", xsd->relptr);
fprintf(f, "%*snreloc=%ld\n", indent_level, "", xsd->nreloc);
}
static void
xdf_symrec_data_destroy(void *data)
{
yasm_xfree(data);
}
static void
xdf_symrec_data_print(void *data, FILE *f, int indent_level)
{
xdf_symrec_data *xsd = (xdf_symrec_data *)data;
fprintf(f, "%*ssymtab index=%lu\n", indent_level, "", xsd->index);
}
/* Define valid debug formats to use with this object format */
static const char *xdf_objfmt_dbgfmt_keywords[] = {
"null",
NULL
};
/* Define objfmt structure -- see objfmt.h for details */
yasm_objfmt_module yasm_xdf_LTX_objfmt = {
"Extended Dynamic Object",
"xdf",
"xdf",
32,
0,
xdf_objfmt_dbgfmt_keywords,
"null",
NULL, /* no directives */
NULL, /* no standard macros */
xdf_objfmt_create,
xdf_objfmt_output,
xdf_objfmt_destroy,
xdf_objfmt_add_default_section,
xdf_objfmt_init_new_section,
xdf_objfmt_section_switch,
xdf_objfmt_get_special_sym
};