--- /dev/null
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2012 The NASM Authors - All Rights Reserved
+ * See the file AUTHORS included with the NASM distribution for
+ * the specific copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * outelfx32.c output routines for the Netwide Assembler to produce
+ * ELF32 (x86_64) object file format
+ */
+
+#include "compiler.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <inttypes.h>
+
+#include "nasm.h"
+#include "nasmlib.h"
+#include "saa.h"
+#include "raa.h"
+#include "stdscan.h"
+#include "eval.h"
+#include "output/outform.h"
+#include "output/outlib.h"
+#include "rbtree.h"
+
+#include "output/dwarf.h"
+#include "output/stabs.h"
+#include "output/outelf.h"
+
+#ifdef OF_ELFX32
+
+/*
+ * Relocation types.
+ */
+struct Reloc {
+ struct Reloc *next;
+ int32_t address; /* relative to _start_ of section */
+ int32_t symbol; /* symbol index */
+ int32_t offset; /* symbol addend */
+ int type; /* type of relocation */
+};
+
+struct Symbol {
+ struct rbtree symv; /* symbol value and rbtree of globals */
+ int32_t strpos; /* string table position of name */
+ int32_t section; /* section ID of the symbol */
+ int type; /* symbol type */
+ int other; /* symbol visibility */
+ int32_t size; /* size of symbol */
+ int32_t globnum; /* symbol table offset if global */
+ struct Symbol *nextfwd; /* list of unresolved-size symbols */
+ char *name; /* used temporarily if in above list */
+};
+
+struct Section {
+ struct SAA *data;
+ uint32_t len, size, nrelocs;
+ int32_t index; /* index into sects array */
+ int type; /* SHT_PROGBITS or SHT_NOBITS */
+ uint32_t align; /* alignment: power of two */
+ uint32_t flags; /* section flags */
+ char *name;
+ struct SAA *rel;
+ uint32_t rellen;
+ struct Reloc *head, **tail;
+ struct rbtree *gsyms; /* global symbols in section */
+};
+
+#define SECT_DELTA 32
+static struct Section **sects;
+static int nsects, sectlen;
+
+#define SHSTR_DELTA 256
+static char *shstrtab;
+static int shstrtablen, shstrtabsize;
+
+static struct SAA *syms;
+static uint32_t nlocals, nglobs, ndebugs; /* Symbol counts */
+
+static int32_t def_seg;
+
+static struct RAA *bsym;
+
+static struct SAA *strs;
+static uint32_t strslen;
+
+static struct Symbol *fwds;
+
+static char elf_module[FILENAME_MAX];
+
+static uint8_t elf_osabi = 0; /* Default OSABI = 0 (System V or Linux) */
+static uint8_t elf_abiver = 0; /* Current ABI version */
+
+extern struct ofmt of_elfx32;
+
+static struct ELF_SECTDATA {
+ void *data;
+ int32_t len;
+ bool is_saa;
+} *elf_sects;
+static int elf_nsect, nsections;
+static int32_t elf_foffs;
+
+static void elf_write(void);
+static void elf_sect_write(struct Section *, const void *, size_t);
+static void elf_sect_writeaddr(struct Section *, int32_t, size_t);
+static void elf_section_header(int, int, uint32_t, void *, bool, uint32_t, int, int,
+ int, int);
+static void elf_write_sections(void);
+static struct SAA *elf_build_symtab(int32_t *, int32_t *);
+static struct SAA *elf_build_reltab(uint32_t *, struct Reloc *);
+static void add_sectname(char *, char *);
+
+struct erel {
+ int offset, info;
+};
+
+struct symlininfo {
+ int offset;
+ int section; /* index into sects[] */
+ int segto; /* internal section number */
+ char *name; /* shallow-copied pointer of section name */
+};
+
+struct linelist {
+ struct linelist *next;
+ struct linelist *last;
+ struct symlininfo info;
+ char *filename;
+ int line;
+};
+
+struct sectlist {
+ struct SAA *psaa;
+ int section;
+ int line;
+ int offset;
+ int file;
+ struct sectlist *next;
+ struct sectlist *last;
+};
+
+/* common debug variables */
+static int currentline = 1;
+static int debug_immcall = 0;
+
+/* stabs debug variables */
+static struct linelist *stabslines = 0;
+static int numlinestabs = 0;
+static char *stabs_filename = 0;
+static uint8_t *stabbuf = 0, *stabstrbuf = 0, *stabrelbuf = 0;
+static int stablen, stabstrlen, stabrellen;
+
+/* dwarf debug variables */
+static struct linelist *dwarf_flist = 0, *dwarf_clist = 0, *dwarf_elist = 0;
+static struct sectlist *dwarf_fsect = 0, *dwarf_csect = 0, *dwarf_esect = 0;
+static int dwarf_numfiles = 0, dwarf_nsections;
+static uint8_t *arangesbuf = 0, *arangesrelbuf = 0, *pubnamesbuf = 0, *infobuf = 0, *inforelbuf = 0,
+ *abbrevbuf = 0, *linebuf = 0, *linerelbuf = 0, *framebuf = 0, *locbuf = 0;
+static int8_t line_base = -5, line_range = 14, opcode_base = 13;
+static int arangeslen, arangesrellen, pubnameslen, infolen, inforellen,
+ abbrevlen, linelen, linerellen, framelen, loclen;
+static int32_t dwarf_infosym, dwarf_abbrevsym, dwarf_linesym;
+
+
+static struct dfmt df_dwarf;
+static struct dfmt df_stabs;
+static struct Symbol *lastsym;
+
+/* common debugging routines */
+static void debugx32_typevalue(int32_t);
+static void debugx32_deflabel(char *, int32_t, int64_t, int, char *);
+static void debugx32_directive(const char *, const char *);
+
+/* stabs debugging routines */
+static void stabsx32_linenum(const char *filename, int32_t linenumber, int32_t);
+static void stabsx32_output(int, void *);
+static void stabsx32_generate(void);
+static void stabsx32_cleanup(void);
+
+/* dwarf debugging routines */
+static void dwarfx32_init(void);
+static void dwarfx32_linenum(const char *filename, int32_t linenumber, int32_t);
+static void dwarfx32_output(int, void *);
+static void dwarfx32_generate(void);
+static void dwarfx32_cleanup(void);
+static void dwarfx32_findfile(const char *);
+static void dwarfx32_findsect(const int);
+
+/*
+ * Special section numbers which are used to define ELF special
+ * symbols, which can be used with WRT to provide PIC relocation
+ * types.
+ */
+static int32_t elf_gotpc_sect, elf_gotoff_sect;
+static int32_t elf_got_sect, elf_plt_sect;
+static int32_t elf_sym_sect;
+static int32_t elf_gottpoff_sect;
+
+static void elf_init(void)
+{
+ maxbits = 64;
+ sects = NULL;
+ nsects = sectlen = 0;
+ syms = saa_init((int32_t)sizeof(struct Symbol));
+ nlocals = nglobs = ndebugs = 0;
+ bsym = raa_init();
+ strs = saa_init(1L);
+ saa_wbytes(strs, "\0", 1L);
+ saa_wbytes(strs, elf_module, strlen(elf_module)+1);
+ strslen = 2 + strlen(elf_module);
+ shstrtab = NULL;
+ shstrtablen = shstrtabsize = 0;;
+ add_sectname("", "");
+
+ fwds = NULL;
+
+ elf_gotpc_sect = seg_alloc();
+ define_label("..gotpc", elf_gotpc_sect + 1, 0L, NULL, false, false);
+ elf_gotoff_sect = seg_alloc();
+ define_label("..gotoff", elf_gotoff_sect + 1, 0L, NULL, false, false);
+ elf_got_sect = seg_alloc();
+ define_label("..got", elf_got_sect + 1, 0L, NULL, false, false);
+ elf_plt_sect = seg_alloc();
+ define_label("..plt", elf_plt_sect + 1, 0L, NULL, false, false);
+ elf_sym_sect = seg_alloc();
+ define_label("..sym", elf_sym_sect + 1, 0L, NULL, false, false);
+ elf_gottpoff_sect = seg_alloc();
+ define_label("..gottpoff", elf_gottpoff_sect + 1, 0L, NULL, false, false);
+
+ def_seg = seg_alloc();
+
+}
+
+static void elf_cleanup(int debuginfo)
+{
+ struct Reloc *r;
+ int i;
+
+ (void)debuginfo;
+
+ elf_write();
+ for (i = 0; i < nsects; i++) {
+ if (sects[i]->type != SHT_NOBITS)
+ saa_free(sects[i]->data);
+ if (sects[i]->head)
+ saa_free(sects[i]->rel);
+ while (sects[i]->head) {
+ r = sects[i]->head;
+ sects[i]->head = sects[i]->head->next;
+ nasm_free(r);
+ }
+ }
+ nasm_free(sects);
+ saa_free(syms);
+ raa_free(bsym);
+ saa_free(strs);
+ if (of_elfx32.current_dfmt) {
+ of_elfx32.current_dfmt->cleanup();
+ }
+}
+
+/* add entry to the elf .shstrtab section */
+static void add_sectname(char *firsthalf, char *secondhalf)
+{
+ int len = strlen(firsthalf) + strlen(secondhalf);
+ while (shstrtablen + len + 1 > shstrtabsize)
+ shstrtab = nasm_realloc(shstrtab, (shstrtabsize += SHSTR_DELTA));
+ strcpy(shstrtab + shstrtablen, firsthalf);
+ strcat(shstrtab + shstrtablen, secondhalf);
+ shstrtablen += len + 1;
+}
+
+static int elf_make_section(char *name, int type, int flags, int align)
+{
+ struct Section *s;
+
+ s = nasm_zalloc(sizeof(*s));
+
+ if (type != SHT_NOBITS)
+ s->data = saa_init(1L);
+ s->tail = &s->head;
+ if (!strcmp(name, ".text"))
+ s->index = def_seg;
+ else
+ s->index = seg_alloc();
+ add_sectname("", name);
+
+ s->name = nasm_strdup(name);
+ s->type = type;
+ s->flags = flags;
+ s->align = align;
+
+ if (nsects >= sectlen)
+ sects = nasm_realloc(sects, (sectlen += SECT_DELTA) * sizeof(*sects));
+ sects[nsects++] = s;
+
+ return nsects - 1;
+}
+
+static int32_t elf_section_names(char *name, int pass, int *bits)
+{
+ char *p;
+ uint32_t flags, flags_and, flags_or;
+ uint64_t align;
+ int type, i;
+
+ /*
+ * Default is 64 bits.
+ */
+ if (!name) {
+ *bits = 64;
+ return def_seg;
+ }
+
+ p = nasm_skip_word(name);
+ if (*p)
+ *p++ = '\0';
+ flags_and = flags_or = type = align = 0;
+
+ section_attrib(name, p, pass, &flags_and,
+ &flags_or, &align, &type);
+
+ if (!strcmp(name, ".shstrtab") ||
+ !strcmp(name, ".symtab") ||
+ !strcmp(name, ".strtab")) {
+ nasm_error(ERR_NONFATAL, "attempt to redefine reserved section"
+ "name `%s'", name);
+ return NO_SEG;
+ }
+
+ for (i = 0; i < nsects; i++)
+ if (!strcmp(name, sects[i]->name))
+ break;
+ if (i == nsects) {
+ const struct elf_known_section *ks = elf_known_sections;
+
+ while (ks->name) {
+ if (!strcmp(name, ks->name))
+ break;
+ ks++;
+ }
+
+ type = type ? type : ks->type;
+ align = align ? align : ks->align;
+ flags = (ks->flags & ~flags_and) | flags_or;
+
+ i = elf_make_section(name, type, flags, align);
+ } else if (pass == 1) {
+ if ((type && sects[i]->type != type)
+ || (align && sects[i]->align != align)
+ || (flags_and && ((sects[i]->flags & flags_and) != flags_or)))
+ nasm_error(ERR_WARNING, "incompatible section attributes ignored on"
+ " redeclaration of section `%s'", name);
+ }
+
+ return sects[i]->index;
+}
+
+static void elf_deflabel(char *name, int32_t segment, int64_t offset,
+ int is_global, char *special)
+{
+ int pos = strslen;
+ struct Symbol *sym;
+ bool special_used = false;
+
+#if defined(DEBUG) && DEBUG>2
+ nasm_error(ERR_DEBUG,
+ " elf_deflabel: %s, seg=%"PRIx32", off=%"PRIx64", is_global=%d, %s\n",
+ name, segment, offset, is_global, special);
+#endif
+ if (name[0] == '.' && name[1] == '.' && name[2] != '@') {
+ /*
+ * This is a NASM special symbol. We never allow it into
+ * the ELF symbol table, even if it's a valid one. If it
+ * _isn't_ a valid one, we should barf immediately.
+ */
+ if (strcmp(name, "..gotpc") && strcmp(name, "..gotoff") &&
+ strcmp(name, "..got") && strcmp(name, "..plt") &&
+ strcmp(name, "..sym") && strcmp(name, "..gottpoff"))
+ nasm_error(ERR_NONFATAL, "unrecognised special symbol `%s'", name);
+ return;
+ }
+
+ if (is_global == 3) {
+ struct Symbol **s;
+ /*
+ * Fix up a forward-reference symbol size from the first
+ * pass.
+ */
+ for (s = &fwds; *s; s = &(*s)->nextfwd)
+ if (!strcmp((*s)->name, name)) {
+ struct tokenval tokval;
+ expr *e;
+ char *p = nasm_skip_spaces(nasm_skip_word(special));
+
+ stdscan_reset();
+ stdscan_set(p);
+ tokval.t_type = TOKEN_INVALID;
+ e = evaluate(stdscan, NULL, &tokval, NULL, 1, nasm_error, NULL);
+ if (e) {
+ if (!is_simple(e))
+ nasm_error(ERR_NONFATAL, "cannot use relocatable"
+ " expression as symbol size");
+ else
+ (*s)->size = reloc_value(e);
+ }
+
+ /*
+ * Remove it from the list of unresolved sizes.
+ */
+ nasm_free((*s)->name);
+ *s = (*s)->nextfwd;
+ return;
+ }
+ return; /* it wasn't an important one */
+ }
+
+ saa_wbytes(strs, name, (int32_t)(1 + strlen(name)));
+ strslen += 1 + strlen(name);
+
+ lastsym = sym = saa_wstruct(syms);
+
+ memset(&sym->symv, 0, sizeof(struct rbtree));
+
+ sym->strpos = pos;
+ sym->type = is_global ? SYM_GLOBAL : SYM_LOCAL;
+ sym->other = STV_DEFAULT;
+ sym->size = 0;
+ if (segment == NO_SEG)
+ sym->section = SHN_ABS;
+ else {
+ int i;
+ sym->section = SHN_UNDEF;
+ if (segment == def_seg) {
+ /* we have to be sure at least text section is there */
+ int tempint;
+ if (segment != elf_section_names(".text", 2, &tempint))
+ nasm_error(ERR_PANIC, "strange segment conditions in ELF driver");
+ }
+ for (i = 0; i < nsects; i++) {
+ if (segment == sects[i]->index) {
+ sym->section = i + 1;
+ break;
+ }
+ }
+ }
+
+ if (is_global == 2) {
+ sym->size = offset;
+ sym->symv.key = 0;
+ sym->section = SHN_COMMON;
+ /*
+ * We have a common variable. Check the special text to see
+ * if it's a valid number and power of two; if so, store it
+ * as the alignment for the common variable.
+ */
+ if (special) {
+ bool err;
+ sym->symv.key = readnum(special, &err);
+ if (err)
+ nasm_error(ERR_NONFATAL, "alignment constraint `%s' is not a"
+ " valid number", special);
+ else if ((sym->symv.key | (sym->symv.key - 1)) != 2 * sym->symv.key - 1)
+ nasm_error(ERR_NONFATAL, "alignment constraint `%s' is not a"
+ " power of two", special);
+ }
+ special_used = true;
+ } else
+ sym->symv.key = (sym->section == SHN_UNDEF ? 0 : offset);
+
+ if (sym->type == SYM_GLOBAL) {
+ /*
+ * If sym->section == SHN_ABS, then the first line of the
+ * else section would cause a core dump, because its a reference
+ * beyond the end of the section array.
+ * This behaviour is exhibited by this code:
+ * GLOBAL crash_nasm
+ * crash_nasm equ 0
+ * To avoid such a crash, such requests are silently discarded.
+ * This may not be the best solution.
+ */
+ if (sym->section == SHN_UNDEF || sym->section == SHN_COMMON) {
+ bsym = raa_write(bsym, segment, nglobs);
+ } else if (sym->section != SHN_ABS) {
+ /*
+ * This is a global symbol; so we must add it to the rbtree
+ * of global symbols in its section.
+ *
+ * In addition, we check the special text for symbol
+ * type and size information.
+ */
+ sects[sym->section-1]->gsyms =
+ rb_insert(sects[sym->section-1]->gsyms, &sym->symv);
+
+ if (special) {
+ int n = strcspn(special, " \t");
+
+ if (!nasm_strnicmp(special, "function", n))
+ sym->type |= STT_FUNC;
+ else if (!nasm_strnicmp(special, "data", n) ||
+ !nasm_strnicmp(special, "object", n))
+ sym->type |= STT_OBJECT;
+ else if (!nasm_strnicmp(special, "notype", n))
+ sym->type |= STT_NOTYPE;
+ else
+ nasm_error(ERR_NONFATAL, "unrecognised symbol type `%.*s'",
+ n, special);
+ special += n;
+
+ special = nasm_skip_spaces(special);
+ if (*special) {
+ n = strcspn(special, " \t");
+ if (!nasm_strnicmp(special, "default", n))
+ sym->other = STV_DEFAULT;
+ else if (!nasm_strnicmp(special, "internal", n))
+ sym->other = STV_INTERNAL;
+ else if (!nasm_strnicmp(special, "hidden", n))
+ sym->other = STV_HIDDEN;
+ else if (!nasm_strnicmp(special, "protected", n))
+ sym->other = STV_PROTECTED;
+ else
+ n = 0;
+ special += n;
+ }
+
+ if (*special) {
+ struct tokenval tokval;
+ expr *e;
+ int fwd = 0;
+ char *saveme = stdscan_get();
+
+ while (special[n] && nasm_isspace(special[n]))
+ n++;
+ /*
+ * We have a size expression; attempt to
+ * evaluate it.
+ */
+ stdscan_reset();
+ stdscan_set(special + n);
+ tokval.t_type = TOKEN_INVALID;
+ e = evaluate(stdscan, NULL, &tokval, &fwd, 0, nasm_error,
+ NULL);
+ if (fwd) {
+ sym->nextfwd = fwds;
+ fwds = sym;
+ sym->name = nasm_strdup(name);
+ } else if (e) {
+ if (!is_simple(e))
+ nasm_error(ERR_NONFATAL, "cannot use relocatable"
+ " expression as symbol size");
+ else
+ sym->size = reloc_value(e);
+ }
+ stdscan_set(saveme);
+ }
+ special_used = true;
+ }
+ /*
+ * If TLS segment, mark symbol accordingly.
+ */
+ if (sects[sym->section - 1]->flags & SHF_TLS) {
+ sym->type &= 0xf0;
+ sym->type |= STT_TLS;
+ }
+ }
+ sym->globnum = nglobs;
+ nglobs++;
+ } else
+ nlocals++;
+
+ if (special && !special_used)
+ nasm_error(ERR_NONFATAL, "no special symbol features supported here");
+}
+
+static void elf_add_reloc(struct Section *sect, int32_t segment,
+ int32_t offset, int type)
+{
+ struct Reloc *r;
+
+ r = *sect->tail = nasm_zalloc(sizeof(struct Reloc));
+ sect->tail = &r->next;
+
+ r->address = sect->len;
+ r->offset = offset;
+
+ if (segment != NO_SEG) {
+ int i;
+ for (i = 0; i < nsects; i++)
+ if (segment == sects[i]->index)
+ r->symbol = i + 2;
+ if (!r->symbol)
+ r->symbol = GLOBAL_TEMP_BASE + raa_read(bsym, segment);
+ }
+ r->type = type;
+
+ sect->nrelocs++;
+}
+
+/*
+ * This routine deals with ..got and ..sym relocations: the more
+ * complicated kinds. In shared-library writing, some relocations
+ * with respect to global symbols must refer to the precise symbol
+ * rather than referring to an offset from the base of the section
+ * _containing_ the symbol. Such relocations call to this routine,
+ * which searches the symbol list for the symbol in question.
+ *
+ * R_X86_64_GOT32 references require the _exact_ symbol address to be
+ * used; R_X86_64_32 references can be at an offset from the symbol.
+ * The boolean argument `exact' tells us this.
+ *
+ * Return value is the adjusted value of `addr', having become an
+ * offset from the symbol rather than the section. Should always be
+ * zero when returning from an exact call.
+ *
+ * Limitation: if you define two symbols at the same place,
+ * confusion will occur.
+ *
+ * Inefficiency: we search, currently, using a linked list which
+ * isn't even necessarily sorted.
+ */
+static void elf_add_gsym_reloc(struct Section *sect,
+ int32_t segment, uint32_t offset, int32_t pcrel,
+ int type, bool exact)
+{
+ struct Reloc *r;
+ struct Section *s;
+ struct Symbol *sym;
+ struct rbtree *srb;
+ int i;
+
+ /*
+ * First look up the segment/offset pair and find a global
+ * symbol corresponding to it. If it's not one of our segments,
+ * then it must be an external symbol, in which case we're fine
+ * doing a normal elf_add_reloc after first sanity-checking
+ * that the offset from the symbol is zero.
+ */
+ s = NULL;
+ for (i = 0; i < nsects; i++)
+ if (segment == sects[i]->index) {
+ s = sects[i];
+ break;
+ }
+
+ if (!s) {
+ if (exact && offset)
+ nasm_error(ERR_NONFATAL, "invalid access to an external symbol");
+ else
+ elf_add_reloc(sect, segment, offset - pcrel, type);
+ return;
+ }
+
+ srb = rb_search(s->gsyms, offset);
+ if (!srb || (exact && srb->key != offset)) {
+ nasm_error(ERR_NONFATAL, "unable to find a suitable global symbol"
+ " for this reference");
+ return;
+ }
+ sym = container_of(srb, struct Symbol, symv);
+
+ r = *sect->tail = nasm_malloc(sizeof(struct Reloc));
+ sect->tail = &r->next;
+ r->next = NULL;
+
+ r->address = sect->len;
+ r->offset = offset - pcrel - sym->symv.key;
+ r->symbol = GLOBAL_TEMP_BASE + sym->globnum;
+ r->type = type;
+
+ sect->nrelocs++;
+}
+
+static void elf_out(int32_t segto, const void *data,
+ enum out_type type, uint64_t size,
+ int32_t segment, int32_t wrt)
+{
+ struct Section *s;
+ int32_t addr;
+ int reltype, bytes;
+ int i;
+ static struct symlininfo sinfo;
+
+#if defined(DEBUG) && DEBUG>2
+ if (data)
+ nasm_error(ERR_DEBUG,
+ " elf_out line: %d type: %x seg: %"PRIx32" segto: %"PRIx32" bytes: %"PRIx64" data: %"PRIx64"\n",
+ currentline, type, segment, segto, size, *(int64_t *)data);
+ else
+ nasm_error(ERR_DEBUG,
+ " elf_out line: %d type: %x seg: %"PRIx32" segto: %"PRIx32" bytes: %"PRIx64"\n",
+ currentline, type, segment, segto, size);
+#endif
+
+ /*
+ * handle absolute-assembly (structure definitions)
+ */
+ if (segto == NO_SEG) {
+ if (type != OUT_RESERVE)
+ nasm_error(ERR_NONFATAL, "attempt to assemble code in [ABSOLUTE]"
+ " space");
+ return;
+ }
+
+ s = NULL;
+ for (i = 0; i < nsects; i++)
+ if (segto == sects[i]->index) {
+ s = sects[i];
+ break;
+ }
+ if (!s) {
+ int tempint; /* ignored */
+ if (segto != elf_section_names(".text", 2, &tempint))
+ nasm_error(ERR_PANIC, "strange segment conditions in ELF driver");
+ else {
+ s = sects[nsects - 1];
+ i = nsects - 1;
+ }
+ }
+
+ /* again some stabs debugging stuff */
+ if (of_elfx32.current_dfmt) {
+ sinfo.offset = s->len;
+ sinfo.section = i;
+ sinfo.segto = segto;
+ sinfo.name = s->name;
+ of_elfx32.current_dfmt->debug_output(TY_DEBUGSYMLIN, &sinfo);
+ }
+ /* end of debugging stuff */
+
+ if (s->type == SHT_NOBITS && type != OUT_RESERVE) {
+ nasm_error(ERR_WARNING, "attempt to initialize memory in"
+ " BSS section `%s': ignored", s->name);
+ s->len += realsize(type, size);
+ return;
+ }
+
+ switch (type) {
+ case OUT_RESERVE:
+ if (s->type == SHT_PROGBITS) {
+ nasm_error(ERR_WARNING, "uninitialized space declared in"
+ " non-BSS section `%s': zeroing", s->name);
+ elf_sect_write(s, NULL, size);
+ } else
+ s->len += size;
+ break;
+
+ case OUT_RAWDATA:
+ if (segment != NO_SEG)
+ nasm_error(ERR_PANIC, "OUT_RAWDATA with other than NO_SEG");
+ elf_sect_write(s, data, size);
+ break;
+
+ case OUT_ADDRESS:
+ addr = *(int64_t *)data;
+ if (segment == NO_SEG) {
+ /* Do nothing */
+ } else if (segment % 2) {
+ nasm_error(ERR_NONFATAL, "ELF format does not support"
+ " segment base references");
+ } else {
+ if (wrt == NO_SEG) {
+ switch ((int)size) {
+ case 1:
+ elf_add_reloc(s, segment, addr, R_X86_64_8);
+ break;
+ case 2:
+ elf_add_reloc(s, segment, addr, R_X86_64_16);
+ break;
+ case 4:
+ elf_add_reloc(s, segment, addr, R_X86_64_32);
+ break;
+ case 8:
+ elf_add_reloc(s, segment, addr, R_X86_64_64);
+ break;
+ default:
+ nasm_error(ERR_PANIC, "internal error elfx32-hpa-871");
+ break;
+ }
+ addr = 0;
+ } else if (wrt == elf_gotpc_sect + 1) {
+ /*
+ * The user will supply GOT relative to $$. ELF
+ * will let us have GOT relative to $. So we
+ * need to fix up the data item by $-$$.
+ */
+ addr += s->len;
+ elf_add_reloc(s, segment, addr, R_X86_64_GOTPC32);
+ addr = 0;
+ } else if (wrt == elf_gotoff_sect + 1) {
+ nasm_error(ERR_NONFATAL, "ELFX32 doesn't support "
+ "R_X86_64_GOTOFF64");
+ } else if (wrt == elf_got_sect + 1) {
+ switch ((int)size) {
+ case 4:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_GOT32, true);
+ addr = 0;
+ break;
+ default:
+ nasm_error(ERR_NONFATAL, "invalid ..got reference");
+ break;
+ }
+ } else if (wrt == elf_sym_sect + 1) {
+ switch ((int)size) {
+ case 1:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_8, false);
+ addr = 0;
+ break;
+ case 2:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_16, false);
+ addr = 0;
+ break;
+ case 4:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_32, false);
+ addr = 0;
+ break;
+ case 8:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_64, false);
+ addr = 0;
+ break;
+ default:
+ nasm_error(ERR_PANIC, "internal error elfx32-hpa-903");
+ break;
+ }
+ } else if (wrt == elf_plt_sect + 1) {
+ nasm_error(ERR_NONFATAL, "ELF format cannot produce non-PC-"
+ "relative PLT references");
+ } else {
+ nasm_error(ERR_NONFATAL, "ELF format does not support this"
+ " use of WRT");
+ }
+ }
+ elf_sect_writeaddr(s, addr, size);
+ break;
+
+ case OUT_REL1ADR:
+ reltype = R_X86_64_PC8;
+ bytes = 1;
+ goto rel12adr;
+
+ case OUT_REL2ADR:
+ reltype = R_X86_64_PC16;
+ bytes = 2;
+ goto rel12adr;
+
+ rel12adr:
+ addr = *(int64_t *)data - size;
+ if (segment == segto)
+ nasm_error(ERR_PANIC, "intra-segment OUT_REL1ADR");
+ if (segment == NO_SEG) {
+ /* Do nothing */
+ } else if (segment % 2) {
+ nasm_error(ERR_NONFATAL, "ELF format does not support"
+ " segment base references");
+ } else {
+ if (wrt == NO_SEG) {
+ elf_add_reloc(s, segment, addr, reltype);
+ addr = 0;
+ } else {
+ nasm_error(ERR_NONFATAL,
+ "Unsupported non-32-bit ELF relocation");
+ }
+ }
+ elf_sect_writeaddr(s, addr, bytes);
+ break;
+
+ case OUT_REL4ADR:
+ addr = *(int64_t *)data - size;
+ if (segment == segto)
+ nasm_error(ERR_PANIC, "intra-segment OUT_REL4ADR");
+ if (segment == NO_SEG) {
+ /* Do nothing */
+ } else if (segment % 2) {
+ nasm_error(ERR_NONFATAL, "ELFX32 format does not support"
+ " segment base references");
+ } else {
+ if (wrt == NO_SEG) {
+ elf_add_reloc(s, segment, addr, R_X86_64_PC32);
+ addr = 0;
+ } else if (wrt == elf_plt_sect + 1) {
+ elf_add_gsym_reloc(s, segment, addr+size, size,
+ R_X86_64_PLT32, true);
+ addr = 0;
+ } else if (wrt == elf_gotpc_sect + 1 ||
+ wrt == elf_got_sect + 1) {
+ elf_add_gsym_reloc(s, segment, addr+size, size,
+ R_X86_64_GOTPCREL, true);
+ addr = 0;
+ } else if (wrt == elf_gotoff_sect + 1 ||
+ wrt == elf_got_sect + 1) {
+ nasm_error(ERR_NONFATAL, "invalid ..gotoff reference");
+ } else if (wrt == elf_gottpoff_sect + 1) {
+ elf_add_gsym_reloc(s, segment, addr+size, size,
+ R_X86_64_GOTTPOFF, true);
+ addr = 0;
+ } else {
+ nasm_error(ERR_NONFATAL, "ELFX32 format does not support this"
+ " use of WRT");
+ }
+ }
+ elf_sect_writeaddr(s, addr, 4);
+ break;
+
+ case OUT_REL8ADR:
+ nasm_error(ERR_NONFATAL,
+ "32-bit ELF format does not support 64-bit relocations");
+ addr = 0;
+ elf_sect_writeaddr(s, addr, 8);
+ break;
+ }
+}
+
+static void elf_write(void)
+{
+ int align;
+ char *p;
+ int i;
+
+ struct SAA *symtab;
+ int32_t symtablen, symtablocal;
+
+ /*
+ * Work out how many sections we will have. We have SHN_UNDEF,
+ * then the flexible user sections, then the fixed sections
+ * `.shstrtab', `.symtab' and `.strtab', then optionally
+ * relocation sections for the user sections.
+ */
+ nsections = sec_numspecial + 1;
+ if (of_elfx32.current_dfmt == &df_stabs)
+ nsections += 3;
+ else if (of_elfx32.current_dfmt == &df_dwarf)
+ nsections += 10;
+
+ add_sectname("", ".shstrtab");
+ add_sectname("", ".symtab");
+ add_sectname("", ".strtab");
+ for (i = 0; i < nsects; i++) {
+ nsections++; /* for the section itself */
+ if (sects[i]->head) {
+ nsections++; /* for its relocations */
+ add_sectname(".rela", sects[i]->name);
+ }
+ }
+
+ if (of_elfx32.current_dfmt == &df_stabs) {
+ /* in case the debug information is wanted, just add these three sections... */
+ add_sectname("", ".stab");
+ add_sectname("", ".stabstr");
+ add_sectname(".rel", ".stab");
+ }
+
+ else if (of_elfx32.current_dfmt == &df_dwarf) {
+ /* the dwarf debug standard specifies the following ten sections,
+ not all of which are currently implemented,
+ although all of them are defined. */
+ add_sectname("", ".debug_aranges");
+ add_sectname(".rela", ".debug_aranges");
+ add_sectname("", ".debug_pubnames");
+ add_sectname("", ".debug_info");
+ add_sectname(".rela", ".debug_info");
+ add_sectname("", ".debug_abbrev");
+ add_sectname("", ".debug_line");
+ add_sectname(".rela", ".debug_line");
+ add_sectname("", ".debug_frame");
+ add_sectname("", ".debug_loc");
+ }
+
+ /*
+ * Output the ELF header.
+ */
+ fwrite("\177ELF\1\1\1", 7, 1, ofile);
+ fputc(elf_osabi, ofile);
+ fputc(elf_abiver, ofile);
+ fwritezero(7, ofile);
+ fwriteint16_t(ET_REL, ofile); /* relocatable file */
+ fwriteint16_t(EM_X86_64, ofile); /* processor ID */
+ fwriteint32_t(1L, ofile); /* EV_CURRENT file format version */
+ fwriteint32_t(0L, ofile); /* no entry point */
+ fwriteint32_t(0L, ofile); /* no program header table */
+ fwriteint32_t(0x40L, ofile); /* section headers straight after
+ * ELF header plus alignment */
+ fwriteint32_t(0L, ofile); /* X86_64 defines no special flags */
+ fwriteint16_t(0x34, ofile); /* size of ELF header */
+ fwriteint16_t(0, ofile); /* no program header table, again */
+ fwriteint16_t(0, ofile); /* still no program header table */
+ fwriteint16_t(sizeof(Elf32_Shdr), ofile); /* size of section header */
+ fwriteint16_t(nsections, ofile); /* number of sections */
+ fwriteint16_t(sec_shstrtab, ofile); /* string table section index for
+ * section header table */
+ fwriteint32_t(0L, ofile); /* align to 0x40 bytes */
+ fwriteint32_t(0L, ofile);
+ fwriteint32_t(0L, ofile);
+
+ /*
+ * Build the symbol table and relocation tables.
+ */
+ symtab = elf_build_symtab(&symtablen, &symtablocal);
+ for (i = 0; i < nsects; i++)
+ if (sects[i]->head)
+ sects[i]->rel = elf_build_reltab(§s[i]->rellen,
+ sects[i]->head);
+
+ /*
+ * Now output the section header table.
+ */
+
+ elf_foffs = 0x40 + sizeof(Elf32_Shdr) * nsections;
+ align = ALIGN(elf_foffs, SEC_FILEALIGN) - elf_foffs;
+ elf_foffs += align;
+ elf_nsect = 0;
+ elf_sects = nasm_malloc(sizeof(*elf_sects) * nsections);
+
+ /* SHN_UNDEF */
+ elf_section_header(0, SHT_NULL, 0, NULL, false, 0, SHN_UNDEF, 0, 0, 0);
+ p = shstrtab + 1;
+
+ /* The normal sections */
+ for (i = 0; i < nsects; i++) {
+ elf_section_header(p - shstrtab, sects[i]->type, sects[i]->flags,
+ (sects[i]->type == SHT_PROGBITS ?
+ sects[i]->data : NULL), true,
+ sects[i]->len, 0, 0, sects[i]->align, 0);
+ p += strlen(p) + 1;
+ }
+
+ /* .shstrtab */
+ elf_section_header(p - shstrtab, SHT_STRTAB, 0, shstrtab, false,
+ shstrtablen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+
+ /* .symtab */
+ elf_section_header(p - shstrtab, SHT_SYMTAB, 0, symtab, true,
+ symtablen, sec_strtab, symtablocal, 4, 16);
+ p += strlen(p) + 1;
+
+ /* .strtab */
+ elf_section_header(p - shstrtab, SHT_STRTAB, 0, strs, true,
+ strslen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+
+ /* The relocation sections */
+ for (i = 0; i < nsects; i++)
+ if (sects[i]->head) {
+ elf_section_header(p - shstrtab, SHT_RELA, 0, sects[i]->rel, true,
+ sects[i]->rellen, sec_symtab, i + 1, 4, 12);
+ p += strlen(p) + 1;
+ }
+
+ if (of_elfx32.current_dfmt == &df_stabs) {
+ /* for debugging information, create the last three sections
+ which are the .stab , .stabstr and .rel.stab sections respectively */
+
+ /* this function call creates the stab sections in memory */
+ stabsx32_generate();
+
+ if (stabbuf && stabstrbuf && stabrelbuf) {
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, stabbuf, false,
+ stablen, sec_stabstr, 0, 4, 12);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_STRTAB, 0, stabstrbuf, false,
+ stabstrlen, 0, 0, 4, 0);
+ p += strlen(p) + 1;
+
+ /* link -> symtable info -> section to refer to */
+ elf_section_header(p - shstrtab, SHT_REL, 0, stabrelbuf, false,
+ stabrellen, sec_symtab, sec_stab, 4, 8);
+ p += strlen(p) + 1;
+ }
+ } else if (of_elfx32.current_dfmt == &df_dwarf) {
+ /* for dwarf debugging information, create the ten dwarf sections */
+
+ /* this function call creates the dwarf sections in memory */
+ if (dwarf_fsect)
+ dwarfx32_generate();
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, arangesbuf, false,
+ arangeslen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_RELA, 0, arangesrelbuf, false,
+ arangesrellen, sec_symtab, sec_debug_aranges, 1, 12);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, pubnamesbuf, false,
+ pubnameslen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, infobuf, false,
+ infolen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_RELA, 0, inforelbuf, false,
+ inforellen, sec_symtab, sec_debug_info, 1, 12);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, abbrevbuf, false,
+ abbrevlen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, linebuf, false,
+ linelen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_RELA, 0, linerelbuf, false,
+ linerellen, sec_symtab, sec_debug_line, 1, 12);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, framebuf, false,
+ framelen, 0, 0, 8, 0);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, locbuf, false,
+ loclen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+ }
+ fwritezero(align, ofile);
+
+ /*
+ * Now output the sections.
+ */
+ elf_write_sections();
+
+ nasm_free(elf_sects);
+ saa_free(symtab);
+}
+
+static struct SAA *elf_build_symtab(int32_t *len, int32_t *local)
+{
+ struct SAA *s = saa_init(1L);
+ struct Symbol *sym;
+ uint8_t entry[24], *p;
+ int i;
+
+ *len = *local = 0;
+
+ /*
+ * First, an all-zeros entry, required by the ELF spec.
+ */
+ saa_wbytes(s, NULL, 16L); /* null symbol table entry */
+ *len += 16;
+ (*local)++;
+
+ /*
+ * Next, an entry for the file name.
+ */
+ p = entry;
+ WRITELONG(p, 1); /* we know it's 1st entry in strtab */
+ WRITELONG(p, 0); /* no value */
+ WRITELONG(p, 0); /* no size either */
+ WRITESHORT(p, STT_FILE); /* type FILE */
+ WRITESHORT(p, SHN_ABS);
+ saa_wbytes(s, entry, 16L);
+ *len += 16;
+ (*local)++;
+
+ /*
+ * Now some standard symbols defining the segments, for relocation
+ * purposes.
+ */
+ for (i = 1; i <= nsects; i++) {
+ p = entry;
+ WRITELONG(p, 0); /* no symbol name */
+ WRITELONG(p, 0); /* offset zero */
+ WRITELONG(p, 0); /* size zero */
+ WRITESHORT(p, STT_SECTION); /* type, binding, and visibility */
+ WRITESHORT(p, i); /* section id */
+ saa_wbytes(s, entry, 16L);
+ *len += 16;
+ (*local)++;
+ }
+
+
+ /*
+ * Now the other local symbols.
+ */
+ saa_rewind(syms);
+ while ((sym = saa_rstruct(syms))) {
+ if (sym->type & SYM_GLOBAL)
+ continue;
+ p = entry;
+ WRITELONG(p, sym->strpos); /* index into symbol string table */
+ WRITELONG(p, sym->symv.key); /* value of symbol */
+ WRITELONG(p, sym->size); /* size of symbol */
+ WRITECHAR(p, sym->type); /* type and binding */
+ WRITECHAR(p, sym->other); /* visibility */
+ WRITESHORT(p, sym->section); /* index into section header table */
+ saa_wbytes(s, entry, 16L);
+ *len += 16;
+ (*local)++;
+ }
+ /*
+ * dwarf needs symbols for debug sections
+ * which are relocation targets.
+ */
+ if (of_elfx32.current_dfmt == &df_dwarf) {
+ dwarf_infosym = *local;
+ p = entry;
+ WRITELONG(p, 0); /* no symbol name */
+ WRITELONG(p, 0); /* offset zero */
+ WRITELONG(p, 0); /* size zero */
+ WRITESHORT(p, STT_SECTION); /* type, binding, and visibility */
+ WRITESHORT(p, sec_debug_info); /* section id */
+ saa_wbytes(s, entry, 16L);
+ *len += 16;
+ (*local)++;
+ dwarf_abbrevsym = *local;
+ p = entry;
+ WRITELONG(p, 0); /* no symbol name */
+ WRITELONG(p, 0); /* offset zero */
+ WRITELONG(p, 0); /* size zero */
+ WRITESHORT(p, STT_SECTION); /* type, binding, and visibility */
+ WRITESHORT(p, sec_debug_abbrev); /* section id */
+ saa_wbytes(s, entry, 16L);
+ *len += 16;
+ (*local)++;
+ dwarf_linesym = *local;
+ p = entry;
+ WRITELONG(p, 0); /* no symbol name */
+ WRITELONG(p, 0); /* offset zero */
+ WRITELONG(p, 0); /* size zero */
+ WRITESHORT(p, STT_SECTION); /* type, binding, and visibility */
+ WRITESHORT(p, sec_debug_line); /* section id */
+ saa_wbytes(s, entry, 16L);
+ *len += 16;
+ (*local)++;
+ }
+
+ /*
+ * Now the global symbols.
+ */
+ saa_rewind(syms);
+ while ((sym = saa_rstruct(syms))) {
+ if (!(sym->type & SYM_GLOBAL))
+ continue;
+ p = entry;
+ WRITELONG(p, sym->strpos);
+ WRITELONG(p, sym->symv.key);
+ WRITELONG(p, sym->size);
+ WRITECHAR(p, sym->type); /* type and binding */
+ WRITECHAR(p, sym->other); /* visibility */
+ WRITESHORT(p, sym->section);
+ saa_wbytes(s, entry, 16L);
+ *len += 16;
+ }
+
+ return s;
+}
+
+static struct SAA *elf_build_reltab(uint32_t *len, struct Reloc *r)
+{
+ struct SAA *s;
+ uint8_t *p, entry[12];
+ int32_t global_offset;
+
+ if (!r)
+ return NULL;
+
+ s = saa_init(1L);
+ *len = 0;
+
+ /*
+ * How to onvert from a global placeholder to a real symbol index;
+ * the +2 refers to the two special entries, the null entry and
+ * the filename entry.
+ */
+ global_offset = -GLOBAL_TEMP_BASE + nsects + nlocals + ndebugs + 2;
+
+ while (r) {
+ int32_t sym = r->symbol;
+
+ if (sym >= GLOBAL_TEMP_BASE)
+ sym += global_offset;
+
+ p = entry;
+ WRITELONG(p, r->address);
+ WRITELONG(p, (sym << 8) + r->type);
+ WRITELONG(p, r->offset);
+ saa_wbytes(s, entry, 12L);
+ *len += 12;
+
+ r = r->next;
+ }
+
+ return s;
+}
+
+static void elf_section_header(int name, int type, uint32_t flags,
+ void *data, bool is_saa, uint32_t datalen,
+ int link, int info, int align, int eltsize)
+{
+ elf_sects[elf_nsect].data = data;
+ elf_sects[elf_nsect].len = datalen;
+ elf_sects[elf_nsect].is_saa = is_saa;
+ elf_nsect++;
+
+ fwriteint32_t((int32_t)name, ofile);
+ fwriteint32_t((int32_t)type, ofile);
+ fwriteint32_t((int32_t)flags, ofile);
+ fwriteint32_t(0L, ofile); /* no address, ever, in object files */
+ fwriteint32_t(type == 0 ? 0L : elf_foffs, ofile);
+ fwriteint32_t(datalen, ofile);
+ if (data)
+ elf_foffs += ALIGN(datalen, SEC_FILEALIGN);
+ fwriteint32_t((int32_t)link, ofile);
+ fwriteint32_t((int32_t)info, ofile);
+ fwriteint32_t((int32_t)align, ofile);
+ fwriteint32_t((int32_t)eltsize, ofile);
+}
+
+static void elf_write_sections(void)
+{
+ int i;
+ for (i = 0; i < elf_nsect; i++)
+ if (elf_sects[i].data) {
+ int32_t len = elf_sects[i].len;
+ int32_t reallen = ALIGN(len, SEC_FILEALIGN);
+ int32_t align = reallen - len;
+ if (elf_sects[i].is_saa)
+ saa_fpwrite(elf_sects[i].data, ofile);
+ else
+ fwrite(elf_sects[i].data, len, 1, ofile);
+ fwritezero(align, ofile);
+ }
+}
+
+static void elf_sect_write(struct Section *sect, const void *data, size_t len)
+{
+ saa_wbytes(sect->data, data, len);
+ sect->len += len;
+}
+static void elf_sect_writeaddr(struct Section *sect, int32_t data, size_t len)
+{
+ saa_writeaddr(sect->data, data, len);
+ sect->len += len;
+}
+
+static void elf_sectalign(int32_t seg, unsigned int value)
+{
+ struct Section *s = NULL;
+ int i;
+
+ for (i = 0; i < nsects; i++) {
+ if (sects[i]->index == seg) {
+ s = sects[i];
+ break;
+ }
+ }
+ if (!s || !is_power2(value))
+ return;
+
+ if (value > s->align)
+ s->align = value;
+}
+
+static int32_t elf_segbase(int32_t segment)
+{
+ return segment;
+}
+
+static int elf_directive(enum directives directive, char *value, int pass)
+{
+ bool err;
+ int64_t n;
+ char *p;
+
+ switch (directive) {
+ case D_OSABI:
+ if (pass == 2)
+ return 1; /* ignore in pass 2 */
+
+ n = readnum(value, &err);
+ if (err) {
+ nasm_error(ERR_NONFATAL, "`osabi' directive requires a parameter");
+ return 1;
+ }
+ if (n < 0 || n > 255) {
+ nasm_error(ERR_NONFATAL, "valid osabi numbers are 0 to 255");
+ return 1;
+ }
+ elf_osabi = n;
+ elf_abiver = 0;
+
+ if ((p = strchr(value,',')) == NULL)
+ return 1;
+
+ n = readnum(p+1, &err);
+ if (err || n < 0 || n > 255) {
+ nasm_error(ERR_NONFATAL, "invalid ABI version number (valid: 0 to 255)");
+ return 1;
+ }
+
+ elf_abiver = n;
+ return 1;
+
+ default:
+ return 0;
+ }
+}
+
+static void elf_filename(char *inname, char *outname)
+{
+ strcpy(elf_module, inname);
+ standard_extension(inname, outname, ".o");
+}
+
+extern macros_t elf_stdmac[];
+
+static int elf_set_info(enum geninfo type, char **val)
+{
+ (void)type;
+ (void)val;
+ return 0;
+}
+static struct dfmt df_dwarf = {
+ "ELFX32 (x86-64) dwarf debug format for Linux/Unix",
+ "dwarf",
+ dwarfx32_init,
+ dwarfx32_linenum,
+ debugx32_deflabel,
+ debugx32_directive,
+ debugx32_typevalue,
+ dwarfx32_output,
+ dwarfx32_cleanup
+};
+static struct dfmt df_stabs = {
+ "ELFX32 (x86-64) stabs debug format for Linux/Unix",
+ "stabs",
+ null_debug_init,
+ stabsx32_linenum,
+ debugx32_deflabel,
+ debugx32_directive,
+ debugx32_typevalue,
+ stabsx32_output,
+ stabsx32_cleanup
+};
+
+struct dfmt *elfx32_debugs_arr[3] = { &df_dwarf, &df_stabs, NULL };
+
+struct ofmt of_elfx32 = {
+ "ELFX32 (x86_64) object files (e.g. Linux)",
+ "elfx32",
+ 0,
+ elfx32_debugs_arr,
+ &df_stabs,
+ elf_stdmac,
+ elf_init,
+ elf_set_info,
+ elf_out,
+ elf_deflabel,
+ elf_section_names,
+ elf_sectalign,
+ elf_segbase,
+ elf_directive,
+ elf_filename,
+ elf_cleanup
+};
+
+/* common debugging routines */
+static void debugx32_deflabel(char *name, int32_t segment, int64_t offset,
+ int is_global, char *special)
+{
+ (void)name;
+ (void)segment;
+ (void)offset;
+ (void)is_global;
+ (void)special;
+}
+
+static void debugx32_directive(const char *directive, const char *params)
+{
+ (void)directive;
+ (void)params;
+}
+
+static void debugx32_typevalue(int32_t type)
+{
+ int32_t stype, ssize;
+ switch (TYM_TYPE(type)) {
+ case TY_LABEL:
+ ssize = 0;
+ stype = STT_NOTYPE;
+ break;
+ case TY_BYTE:
+ ssize = 1;
+ stype = STT_OBJECT;
+ break;
+ case TY_WORD:
+ ssize = 2;
+ stype = STT_OBJECT;
+ break;
+ case TY_DWORD:
+ ssize = 4;
+ stype = STT_OBJECT;
+ break;
+ case TY_FLOAT:
+ ssize = 4;
+ stype = STT_OBJECT;
+ break;
+ case TY_QWORD:
+ ssize = 8;
+ stype = STT_OBJECT;
+ break;
+ case TY_TBYTE:
+ ssize = 10;
+ stype = STT_OBJECT;
+ break;
+ case TY_OWORD:
+ ssize = 16;
+ stype = STT_OBJECT;
+ break;
+ case TY_YWORD:
+ ssize = 32;
+ stype = STT_OBJECT;
+ break;
+ case TY_COMMON:
+ ssize = 0;
+ stype = STT_COMMON;
+ break;
+ case TY_SEG:
+ ssize = 0;
+ stype = STT_SECTION;
+ break;
+ case TY_EXTERN:
+ ssize = 0;
+ stype = STT_NOTYPE;
+ break;
+ case TY_EQU:
+ ssize = 0;
+ stype = STT_NOTYPE;
+ break;
+ default:
+ ssize = 0;
+ stype = STT_NOTYPE;
+ break;
+ }
+ if (stype == STT_OBJECT && lastsym && !lastsym->type) {
+ lastsym->size = ssize;
+ lastsym->type = stype;
+ }
+}
+
+/* stabs debugging routines */
+
+static void stabsx32_linenum(const char *filename, int32_t linenumber, int32_t segto)
+{
+ (void)segto;
+ if (!stabs_filename) {
+ stabs_filename = (char *)nasm_malloc(strlen(filename) + 1);
+ strcpy(stabs_filename, filename);
+ } else {
+ if (strcmp(stabs_filename, filename)) {
+ /* yep, a memory leak...this program is one-shot anyway, so who cares...
+ in fact, this leak comes in quite handy to maintain a list of files
+ encountered so far in the symbol lines... */
+
+ /* why not nasm_free(stabs_filename); we're done with the old one */
+
+ stabs_filename = (char *)nasm_malloc(strlen(filename) + 1);
+ strcpy(stabs_filename, filename);
+ }
+ }
+ debug_immcall = 1;
+ currentline = linenumber;
+}
+
+
+static void stabsx32_output(int type, void *param)
+{
+ struct symlininfo *s;
+ struct linelist *el;
+ if (type == TY_DEBUGSYMLIN) {
+ if (debug_immcall) {
+ s = (struct symlininfo *)param;
+ if (!(sects[s->section]->flags & SHF_EXECINSTR))
+ return; /* line info is only collected for executable sections */
+ numlinestabs++;
+ el = (struct linelist *)nasm_malloc(sizeof(struct linelist));
+ el->info.offset = s->offset;
+ el->info.section = s->section;
+ el->info.name = s->name;
+ el->line = currentline;
+ el->filename = stabs_filename;
+ el->next = 0;
+ if (stabslines) {
+ stabslines->last->next = el;
+ stabslines->last = el;
+ } else {
+ stabslines = el;
+ stabslines->last = el;
+ }
+ }
+ }
+ debug_immcall = 0;
+}
+
+/* for creating the .stab , .stabstr and .rel.stab sections in memory */
+
+static void stabsx32_generate(void)
+{
+ int i, numfiles, strsize, numstabs = 0, currfile, mainfileindex;
+ uint8_t *sbuf, *ssbuf, *rbuf, *sptr, *rptr;
+ char **allfiles;
+ int *fileidx;
+
+ struct linelist *ptr;
+
+ ptr = stabslines;
+
+ allfiles = (char **)nasm_zalloc(numlinestabs * sizeof(char *));
+ numfiles = 0;
+ while (ptr) {
+ if (numfiles == 0) {
+ allfiles[0] = ptr->filename;
+ numfiles++;
+ } else {
+ for (i = 0; i < numfiles; i++) {
+ if (!strcmp(allfiles[i], ptr->filename))
+ break;
+ }
+ if (i >= numfiles) {
+ allfiles[i] = ptr->filename;
+ numfiles++;
+ }
+ }
+ ptr = ptr->next;
+ }
+ strsize = 1;
+ fileidx = (int *)nasm_malloc(numfiles * sizeof(int));
+ for (i = 0; i < numfiles; i++) {
+ fileidx[i] = strsize;
+ strsize += strlen(allfiles[i]) + 1;
+ }
+ mainfileindex = 0;
+ for (i = 0; i < numfiles; i++) {
+ if (!strcmp(allfiles[i], elf_module)) {
+ mainfileindex = i;
+ break;
+ }
+ }
+
+ /*
+ * worst case size of the stab buffer would be:
+ * the sourcefiles changes each line, which would mean 1 SOL, 1 SYMLIN per line
+ * plus one "ending" entry
+ */
+ sbuf = (uint8_t *)nasm_malloc((numlinestabs * 2 + 4) *
+ sizeof(struct stabentry));
+ ssbuf = (uint8_t *)nasm_malloc(strsize);
+ rbuf = (uint8_t *)nasm_malloc(numlinestabs * 8 * (2 + 3));
+ rptr = rbuf;
+
+ for (i = 0; i < numfiles; i++)
+ strcpy((char *)ssbuf + fileidx[i], allfiles[i]);
+ ssbuf[0] = 0;
+
+ stabstrlen = strsize; /* set global variable for length of stab strings */
+
+ sptr = sbuf;
+ ptr = stabslines;
+ numstabs = 0;
+
+ if (ptr) {
+ /*
+ * this is the first stab, its strx points to the filename of the
+ * the source-file, the n_desc field should be set to the number
+ * of remaining stabs
+ */
+ WRITE_STAB(sptr, fileidx[0], 0, 0, 0, strlen(allfiles[0] + 12));
+
+ /* this is the stab for the main source file */
+ WRITE_STAB(sptr, fileidx[mainfileindex], N_SO, 0, 0, 0);
+
+ /* relocation table entry */
+
+ /*
+ * Since the symbol table has two entries before
+ * the section symbols, the index in the info.section
+ * member must be adjusted by adding 2
+ */
+
+ WRITELONG(rptr, (sptr - sbuf) - 4);
+ WRITELONG(rptr, ((ptr->info.section + 2) << 8) | R_X86_64_32);
+
+ numstabs++;
+ currfile = mainfileindex;
+ }
+
+ while (ptr) {
+ if (strcmp(allfiles[currfile], ptr->filename)) {
+ /* oops file has changed... */
+ for (i = 0; i < numfiles; i++)
+ if (!strcmp(allfiles[i], ptr->filename))
+ break;
+ currfile = i;
+ WRITE_STAB(sptr, fileidx[currfile], N_SOL, 0, 0,
+ ptr->info.offset);
+ numstabs++;
+
+ /* relocation table entry */
+
+ WRITELONG(rptr, (sptr - sbuf) - 4);
+ WRITELONG(rptr, ((ptr->info.section + 2) << 8) | R_X86_64_32);
+ }
+
+ WRITE_STAB(sptr, 0, N_SLINE, 0, ptr->line, ptr->info.offset);
+ numstabs++;
+
+ /* relocation table entry */
+
+ WRITELONG(rptr, (sptr - sbuf) - 4);
+ WRITELONG(rptr, ((ptr->info.section + 2) << 8) | R_X86_64_32);
+
+ ptr = ptr->next;
+
+ }
+
+ /* this is an "ending" token */
+ WRITE_STAB(sptr, 0, N_SO, 0, 0, 0);
+ numstabs++;
+
+ ((struct stabentry *)sbuf)->n_desc = numstabs;
+
+ nasm_free(allfiles);
+ nasm_free(fileidx);
+
+ stablen = (sptr - sbuf);
+ stabrellen = (rptr - rbuf);
+ stabrelbuf = rbuf;
+ stabbuf = sbuf;
+ stabstrbuf = ssbuf;
+}
+
+static void stabsx32_cleanup(void)
+{
+ struct linelist *ptr, *del;
+ if (!stabslines)
+ return;
+
+ ptr = stabslines;
+ while (ptr) {
+ del = ptr;
+ ptr = ptr->next;
+ nasm_free(del);
+ }
+
+ nasm_free(stabbuf);
+ nasm_free(stabrelbuf);
+ nasm_free(stabstrbuf);
+}
+
+/* dwarf routines */
+
+static void dwarfx32_init(void)
+{
+ ndebugs = 3; /* 3 debug symbols */
+}
+
+static void dwarfx32_linenum(const char *filename, int32_t linenumber,
+ int32_t segto)
+{
+ (void)segto;
+ dwarfx32_findfile(filename);
+ debug_immcall = 1;
+ currentline = linenumber;
+}
+
+/* called from elf_out with type == TY_DEBUGSYMLIN */
+static void dwarfx32_output(int type, void *param)
+{
+ int ln, aa, inx, maxln, soc;
+ struct symlininfo *s;
+ struct SAA *plinep;
+
+ (void)type;
+
+ s = (struct symlininfo *)param;
+
+ /* line number info is only gathered for executable sections */
+ if (!(sects[s->section]->flags & SHF_EXECINSTR))
+ return;
+
+ /* Check if section index has changed */
+ if (!(dwarf_csect && (dwarf_csect->section) == (s->section)))
+ dwarfx32_findsect(s->section);
+
+ /* do nothing unless line or file has changed */
+ if (!debug_immcall)
+ return;
+
+ ln = currentline - dwarf_csect->line;
+ aa = s->offset - dwarf_csect->offset;
+ inx = dwarf_clist->line;
+ plinep = dwarf_csect->psaa;
+ /* check for file change */
+ if (!(inx == dwarf_csect->file)) {
+ saa_write8(plinep,DW_LNS_set_file);
+ saa_write8(plinep,inx);
+ dwarf_csect->file = inx;
+ }
+ /* check for line change */
+ if (ln) {
+ /* test if in range of special op code */
+ maxln = line_base + line_range;
+ soc = (ln - line_base) + (line_range * aa) + opcode_base;
+ if (ln >= line_base && ln < maxln && soc < 256) {
+ saa_write8(plinep,soc);
+ } else {
+ saa_write8(plinep,DW_LNS_advance_line);
+ saa_wleb128s(plinep,ln);
+ if (aa) {
+ saa_write8(plinep,DW_LNS_advance_pc);
+ saa_wleb128u(plinep,aa);
+ }
+ }
+ dwarf_csect->line = currentline;
+ dwarf_csect->offset = s->offset;
+ }
+
+ /* show change handled */
+ debug_immcall = 0;
+}
+
+
+static void dwarfx32_generate(void)
+{
+ uint8_t *pbuf;
+ int indx;
+ struct linelist *ftentry;
+ struct SAA *paranges, *ppubnames, *pinfo, *pabbrev, *plines, *plinep;
+ struct SAA *parangesrel, *plinesrel, *pinforel;
+ struct sectlist *psect;
+ size_t saalen, linepoff, totlen, highaddr;
+
+ /* write epilogues for each line program range */
+ /* and build aranges section */
+ paranges = saa_init(1L);
+ parangesrel = saa_init(1L);
+ saa_write16(paranges,3); /* dwarf version */
+ saa_write32(parangesrel, paranges->datalen+4);
+ saa_write32(parangesrel, (dwarf_infosym << 8) + R_X86_64_32); /* reloc to info */
+ saa_write32(parangesrel, 0);
+ saa_write32(paranges,0); /* offset into info */
+ saa_write8(paranges,4); /* pointer size */
+ saa_write8(paranges,0); /* not segmented */
+ saa_write32(paranges,0); /* padding */
+ /* iterate though sectlist entries */
+ psect = dwarf_fsect;
+ totlen = 0;
+ highaddr = 0;
+ for (indx = 0; indx < dwarf_nsections; indx++)
+ {
+ plinep = psect->psaa;
+ /* Line Number Program Epilogue */
+ saa_write8(plinep,2); /* std op 2 */
+ saa_write8(plinep,(sects[psect->section]->len)-psect->offset);
+ saa_write8(plinep,DW_LNS_extended_op);
+ saa_write8(plinep,1); /* operand length */
+ saa_write8(plinep,DW_LNE_end_sequence);
+ totlen += plinep->datalen;
+ /* range table relocation entry */
+ saa_write32(parangesrel, paranges->datalen + 4);
+ saa_write32(parangesrel, ((uint32_t) (psect->section + 2) << 8) + R_X86_64_32);
+ saa_write32(parangesrel, (uint32_t) 0);
+ /* range table entry */
+ saa_write32(paranges,0x0000); /* range start */
+ saa_write32(paranges,sects[psect->section]->len); /* range length */
+ highaddr += sects[psect->section]->len;
+ /* done with this entry */
+ psect = psect->next;
+ }
+ saa_write32(paranges,0); /* null address */
+ saa_write32(paranges,0); /* null length */
+ saalen = paranges->datalen;
+ arangeslen = saalen + 4;
+ arangesbuf = pbuf = nasm_malloc(arangeslen);
+ WRITELONG(pbuf,saalen); /* initial length */
+ saa_rnbytes(paranges, pbuf, saalen);
+ saa_free(paranges);
+
+ /* build rela.aranges section */
+ arangesrellen = saalen = parangesrel->datalen;
+ arangesrelbuf = pbuf = nasm_malloc(arangesrellen);
+ saa_rnbytes(parangesrel, pbuf, saalen);
+ saa_free(parangesrel);
+
+ /* build pubnames section */
+ ppubnames = saa_init(1L);
+ saa_write16(ppubnames,3); /* dwarf version */
+ saa_write32(ppubnames,0); /* offset into info */
+ saa_write32(ppubnames,0); /* space used in info */
+ saa_write32(ppubnames,0); /* end of list */
+ saalen = ppubnames->datalen;
+ pubnameslen = saalen + 4;
+ pubnamesbuf = pbuf = nasm_malloc(pubnameslen);
+ WRITELONG(pbuf,saalen); /* initial length */
+ saa_rnbytes(ppubnames, pbuf, saalen);
+ saa_free(ppubnames);
+
+ /* build info section */
+ pinfo = saa_init(1L);
+ pinforel = saa_init(1L);
+ saa_write16(pinfo,3); /* dwarf version */
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, (dwarf_abbrevsym << 8) + R_X86_64_32); /* reloc to abbrev */
+ saa_write32(pinforel, 0);
+ saa_write32(pinfo,0); /* offset into abbrev */
+ saa_write8(pinfo,4); /* pointer size */
+ saa_write8(pinfo,1); /* abbrviation number LEB128u */
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, ((dwarf_fsect->section + 2) << 8) + R_X86_64_32);
+ saa_write32(pinforel, 0);
+ saa_write32(pinfo,0); /* DW_AT_low_pc */
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, ((dwarf_fsect->section + 2) << 8) + R_X86_64_32);
+ saa_write32(pinforel, 0);
+ saa_write32(pinfo,highaddr); /* DW_AT_high_pc */
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, (dwarf_linesym << 8) + R_X86_64_32); /* reloc to line */
+ saa_write32(pinforel, 0);
+ saa_write32(pinfo,0); /* DW_AT_stmt_list */
+ saa_wbytes(pinfo, elf_module, strlen(elf_module)+1);
+ saa_wbytes(pinfo, nasm_signature, strlen(nasm_signature)+1);
+ saa_write16(pinfo,DW_LANG_Mips_Assembler);
+ saa_write8(pinfo,2); /* abbrviation number LEB128u */
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, ((dwarf_fsect->section + 2) << 8) + R_X86_64_32);
+ saa_write32(pinforel, 0);
+ saa_write32(pinfo,0); /* DW_AT_low_pc */
+ saa_write32(pinfo,0); /* DW_AT_frame_base */
+ saa_write8(pinfo,0); /* end of entries */
+ saalen = pinfo->datalen;
+ infolen = saalen + 4;
+ infobuf = pbuf = nasm_malloc(infolen);
+ WRITELONG(pbuf,saalen); /* initial length */
+ saa_rnbytes(pinfo, pbuf, saalen);
+ saa_free(pinfo);
+
+ /* build rela.info section */
+ inforellen = saalen = pinforel->datalen;
+ inforelbuf = pbuf = nasm_malloc(inforellen);
+ saa_rnbytes(pinforel, pbuf, saalen);
+ saa_free(pinforel);
+
+ /* build abbrev section */
+ pabbrev = saa_init(1L);
+ saa_write8(pabbrev,1); /* entry number LEB128u */
+ saa_write8(pabbrev,DW_TAG_compile_unit); /* tag LEB128u */
+ saa_write8(pabbrev,1); /* has children */
+ /* the following attributes and forms are all LEB128u values */
+ saa_write8(pabbrev,DW_AT_low_pc);
+ saa_write8(pabbrev,DW_FORM_addr);
+ saa_write8(pabbrev,DW_AT_high_pc);
+ saa_write8(pabbrev,DW_FORM_addr);
+ saa_write8(pabbrev,DW_AT_stmt_list);
+ saa_write8(pabbrev,DW_FORM_data4);
+ saa_write8(pabbrev,DW_AT_name);
+ saa_write8(pabbrev,DW_FORM_string);
+ saa_write8(pabbrev,DW_AT_producer);
+ saa_write8(pabbrev,DW_FORM_string);
+ saa_write8(pabbrev,DW_AT_language);
+ saa_write8(pabbrev,DW_FORM_data2);
+ saa_write16(pabbrev,0); /* end of entry */
+ /* LEB128u usage same as above */
+ saa_write8(pabbrev,2); /* entry number */
+ saa_write8(pabbrev,DW_TAG_subprogram);
+ saa_write8(pabbrev,0); /* no children */
+ saa_write8(pabbrev,DW_AT_low_pc);
+ saa_write8(pabbrev,DW_FORM_addr);
+ saa_write8(pabbrev,DW_AT_frame_base);
+ saa_write8(pabbrev,DW_FORM_data4);
+ saa_write16(pabbrev,0); /* end of entry */
+ abbrevlen = saalen = pabbrev->datalen;
+ abbrevbuf = pbuf = nasm_malloc(saalen);
+ saa_rnbytes(pabbrev, pbuf, saalen);
+ saa_free(pabbrev);
+
+ /* build line section */
+ /* prolog */
+ plines = saa_init(1L);
+ saa_write8(plines,1); /* Minimum Instruction Length */
+ saa_write8(plines,1); /* Initial value of 'is_stmt' */
+ saa_write8(plines,line_base); /* Line Base */
+ saa_write8(plines,line_range); /* Line Range */
+ saa_write8(plines,opcode_base); /* Opcode Base */
+ /* standard opcode lengths (# of LEB128u operands) */
+ saa_write8(plines,0); /* Std opcode 1 length */
+ saa_write8(plines,1); /* Std opcode 2 length */
+ saa_write8(plines,1); /* Std opcode 3 length */
+ saa_write8(plines,1); /* Std opcode 4 length */
+ saa_write8(plines,1); /* Std opcode 5 length */
+ saa_write8(plines,0); /* Std opcode 6 length */
+ saa_write8(plines,0); /* Std opcode 7 length */
+ saa_write8(plines,0); /* Std opcode 8 length */
+ saa_write8(plines,1); /* Std opcode 9 length */
+ saa_write8(plines,0); /* Std opcode 10 length */
+ saa_write8(plines,0); /* Std opcode 11 length */
+ saa_write8(plines,1); /* Std opcode 12 length */
+ /* Directory Table */
+ saa_write8(plines,0); /* End of table */
+ /* File Name Table */
+ ftentry = dwarf_flist;
+ for (indx = 0;indx<dwarf_numfiles;indx++)
+ {
+ saa_wbytes(plines, ftentry->filename, (int32_t)(strlen(ftentry->filename) + 1));
+ saa_write8(plines,0); /* directory LEB128u */
+ saa_write8(plines,0); /* time LEB128u */
+ saa_write8(plines,0); /* size LEB128u */
+ ftentry = ftentry->next;
+ }
+ saa_write8(plines,0); /* End of table */
+ linepoff = plines->datalen;
+ linelen = linepoff + totlen + 10;
+ linebuf = pbuf = nasm_malloc(linelen);
+ WRITELONG(pbuf,linelen-4); /* initial length */
+ WRITESHORT(pbuf,3); /* dwarf version */
+ WRITELONG(pbuf,linepoff); /* offset to line number program */
+ /* write line header */
+ saalen = linepoff;
+ saa_rnbytes(plines, pbuf, saalen); /* read a given no. of bytes */
+ pbuf += linepoff;
+ saa_free(plines);
+ /* concatonate line program ranges */
+ linepoff += 13;
+ plinesrel = saa_init(1L);
+ psect = dwarf_fsect;
+ for (indx = 0; indx < dwarf_nsections; indx++) {
+ saa_write32(plinesrel, linepoff);
+ saa_write32(plinesrel, ((psect->section + 2) << 8) + R_X86_64_32);
+ saa_write32(plinesrel, 0);
+ plinep = psect->psaa;
+ saalen = plinep->datalen;
+ saa_rnbytes(plinep, pbuf, saalen);
+ pbuf += saalen;
+ linepoff += saalen;
+ saa_free(plinep);
+ /* done with this entry */
+ psect = psect->next;
+ }
+
+
+ /* build rela.lines section */
+ linerellen =saalen = plinesrel->datalen;
+ linerelbuf = pbuf = nasm_malloc(linerellen);
+ saa_rnbytes(plinesrel, pbuf, saalen);
+ saa_free(plinesrel);
+
+ /* build frame section */
+ framelen = 4;
+ framebuf = pbuf = nasm_malloc(framelen);
+ WRITELONG(pbuf,framelen-4); /* initial length */
+
+ /* build loc section */
+ loclen = 16;
+ locbuf = pbuf = nasm_malloc(loclen);
+ WRITELONG(pbuf,0); /* null beginning offset */
+ WRITELONG(pbuf,0); /* null ending offset */
+}
+
+static void dwarfx32_cleanup(void)
+{
+ nasm_free(arangesbuf);
+ nasm_free(arangesrelbuf);
+ nasm_free(pubnamesbuf);
+ nasm_free(infobuf);
+ nasm_free(inforelbuf);
+ nasm_free(abbrevbuf);
+ nasm_free(linebuf);
+ nasm_free(linerelbuf);
+ nasm_free(framebuf);
+ nasm_free(locbuf);
+}
+
+static void dwarfx32_findfile(const char * fname)
+{
+ int finx;
+ struct linelist *match;
+
+ /* return if fname is current file name */
+ if (dwarf_clist && !(strcmp(fname, dwarf_clist->filename)))
+ return;
+
+ /* search for match */
+ match = 0;
+ if (dwarf_flist) {
+ match = dwarf_flist;
+ for (finx = 0; finx < dwarf_numfiles; finx++) {
+ if (!(strcmp(fname, match->filename))) {
+ dwarf_clist = match;
+ return;
+ }
+ }
+ }
+
+ /* add file name to end of list */
+ dwarf_clist = (struct linelist *)nasm_malloc(sizeof(struct linelist));
+ dwarf_numfiles++;
+ dwarf_clist->line = dwarf_numfiles;
+ dwarf_clist->filename = nasm_malloc(strlen(fname) + 1);
+ strcpy(dwarf_clist->filename,fname);
+ dwarf_clist->next = 0;
+ if (!dwarf_flist) { /* if first entry */
+ dwarf_flist = dwarf_elist = dwarf_clist;
+ dwarf_clist->last = 0;
+ } else { /* chain to previous entry */
+ dwarf_elist->next = dwarf_clist;
+ dwarf_elist = dwarf_clist;
+ }
+}
+
+static void dwarfx32_findsect(const int index)
+{
+ int sinx;
+ struct sectlist *match;
+ struct SAA *plinep;
+
+ /* return if index is current section index */
+ if (dwarf_csect && (dwarf_csect->section == index))
+ return;
+
+ /* search for match */
+ match = 0;
+ if (dwarf_fsect) {
+ match = dwarf_fsect;
+ for (sinx = 0; sinx < dwarf_nsections; sinx++) {
+ if ((match->section == index)) {
+ dwarf_csect = match;
+ return;
+ }
+ match = match->next;
+ }
+ }
+
+ /* add entry to end of list */
+ dwarf_csect = (struct sectlist *)nasm_malloc(sizeof(struct sectlist));
+ dwarf_nsections++;
+ dwarf_csect->psaa = plinep = saa_init(1L);
+ dwarf_csect->line = 1;
+ dwarf_csect->offset = 0;
+ dwarf_csect->file = 1;
+ dwarf_csect->section = index;
+ dwarf_csect->next = 0;
+ /* set relocatable address at start of line program */
+ saa_write8(plinep,DW_LNS_extended_op);
+ saa_write8(plinep,5); /* operand length */
+ saa_write8(plinep,DW_LNE_set_address);
+ saa_write32(plinep,0); /* Start Address */
+
+ if (!dwarf_fsect) { /* if first entry */
+ dwarf_fsect = dwarf_esect = dwarf_csect;
+ dwarf_csect->last = 0;
+ } else { /* chain to previous entry */
+ dwarf_esect->next = dwarf_csect;
+ dwarf_esect = dwarf_csect;
+ }
+}
+
+#endif /* OF_ELFX32 */
projects / platform / upstream / nasm.git / commitdiff