| /* |
| * 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 |
| }; |
