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nasm/output/outdbg.c
Cyrill Gorcunov f7b44f6092 Merge branch 'nasm-2.14.xx' 
* nasm-2.14.xx: (83 commits)
  NASM 2.14rc16
  doc: Update changes
  preproc: expand_smacro -- Fix nil dereference on error path
  eval: Eliminate division by zero
  doc: Update changes
  opflags: Convert is_class and is_reg_class to helpers
  preproc: Fix out of range access in expand mmacro
  doc: Update changes
  parser: Fix sigsegv on certain equ instruction parsing
  labels: Make sure nil label is never passed
  labels: Don't nil dereference if no label provided
  macho: Add warning message in macho_output()
  macho/reloc: Fix addr size sensitive conditions
  macho/reloc: Fix macho_output() to get the offset adjustments by add_reloc()
  macho/reloc: Fixed offset adjustment in add_reloc()
  macho/reloc: Allow absolute relocation when forcing a symbol reference
  macho/reloc: Adjust SUB relocation information
  macho/reloc: Fixed in handling GOT/GOTLOAD/TLV relocations
  macho/reloc: Simplified relocation for REL/BRANCH
  macho/sym: Record initial symbol number always
  ...

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
2018-10-15 22:58:13 +03:00

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/* ----------------------------------------------------------------------- *
*
* Copyright 1996-2018 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.
*
* ----------------------------------------------------------------------- */
/*
* outdbg.c output routines for the Netwide Assembler to produce
* a debugging trace
*/
#include "compiler.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include "nasm.h"
#include "nasmlib.h"
#include "outform.h"
#include "outlib.h"
#include "insns.h"
#ifdef OF_DBG
struct Section {
struct Section *next;
int32_t number;
char *name;
} *dbgsect;
static unsigned long dbg_max_data_dump = 128;
static bool section_labels = true;
static bool subsections_via_symbols = false;
static int32_t init_seg;
const struct ofmt of_dbg;
static void dbg_init(void)
{
dbgsect = NULL;
fprintf(ofile, "NASM Output format debug dump\n");
fprintf(ofile, "input file = %s\n", inname);
fprintf(ofile, "output file = %s\n", outname);
init_seg = seg_alloc();
}
static void dbg_reset(void)
{
fprintf(ofile, "*** pass reset: pass0 = %d, passn = %"PRId64"\n",
pass0, passn);
}
static void dbg_cleanup(void)
{
dfmt->cleanup();
while (dbgsect) {
struct Section *tmp = dbgsect;
dbgsect = dbgsect->next;
nasm_free(tmp->name);
nasm_free(tmp);
}
}
static int32_t dbg_add_section(char *name, int pass, int *bits,
const char *whatwecallit)
{
int seg;
/*
* We must have an initial default: let's make it 16.
*/
if (!name)
*bits = 16;
if (!name) {
fprintf(ofile, "section_name on init: returning %d\n", init_seg);
seg = init_seg;
} else {
int n = strcspn(name, " \t");
char *sname = nasm_strndup(name, n);
char *tail = nasm_skip_spaces(name+n);
struct Section *s;
seg = NO_SEG;
for (s = dbgsect; s; s = s->next)
if (!strcmp(s->name, sname))
seg = s->number;
if (seg == NO_SEG) {
s = nasm_malloc(sizeof(*s));
s->name = sname;
s->number = seg = seg_alloc();
s->next = dbgsect;
dbgsect = s;
fprintf(ofile, "%s %s (%s) pass %d: returning %d\n",
whatwecallit, name, tail, pass, seg);
if (section_labels)
backend_label(s->name, s->number + 1, 0);
}
}
return seg;
}
static int32_t dbg_section_names(char *name, int pass, int *bits)
{
return dbg_add_section(name, pass, bits, "section_names");
}
static int32_t dbg_herelabel(const char *name, enum label_type type,
int32_t oldseg, int32_t *subsection,
bool *copyoffset)
{
int32_t newseg = oldseg;
if (subsections_via_symbols && type != LBL_LOCAL) {
newseg = *subsection;
if (newseg == NO_SEG) {
newseg = *subsection = seg_alloc();
*copyoffset = true; /* Minic MachO for now */
}
}
fprintf(ofile, "herelabel %s type %d (seg %08x) -> %08x\n",
name, type, oldseg, newseg);
return newseg;
}
static void dbg_deflabel(char *name, int32_t segment, int64_t offset,
int is_global, char *special)
{
fprintf(ofile, "deflabel %s := %08"PRIx32":%016"PRIx64" %s (%d)%s%s\n",
name, segment, offset,
is_global == 2 ? "common" : is_global ? "global" : "local",
is_global, special ? ": " : "", special);
}
static const char *out_type(enum out_type type)
{
static const char *out_types[] = {
"rawdata",
"reserve",
"zerodata",
"address",
"reladdr",
"segment"
};
static char invalid_buf[64];
if (type >= sizeof(out_types)/sizeof(out_types[0])) {
sprintf(invalid_buf, "[invalid type %d]", type);
return invalid_buf;
}
return out_types[type];
}
static const char *out_sign(enum out_sign sign)
{
static const char *out_signs[] = {
"wrap",
"signed",
"unsigned"
};
static char invalid_buf[64];
if (sign >= sizeof(out_signs)/sizeof(out_signs[0])) {
sprintf(invalid_buf, "[invalid sign %d]", sign);
return invalid_buf;
}
return out_signs[sign];
}
static void dbg_out(const struct out_data *data)
{
fprintf(ofile,
"out to %"PRIx32":%"PRIx64" %s %s bits %d insoffs %d/%d "
"size %"PRIu64,
data->segment, data->offset,
out_type(data->type), out_sign(data->sign),
data->bits, data->insoffs, data->inslen, data->size);
if (data->itemp) {
fprintf(ofile, " ins %s(%d)",
nasm_insn_names[data->itemp->opcode], data->itemp->operands);
} else {
fprintf(ofile, " no ins (plain data)");
}
if (data->type == OUT_ADDRESS || data->type == OUT_RELADDR ||
data->type == OUT_SEGMENT) {
fprintf(ofile, " target %"PRIx32":%"PRIx64,
data->tsegment, data->toffset);
if (data->twrt != NO_SEG)
fprintf(ofile, " wrt %"PRIx32, data->twrt);
}
if (data->type == OUT_RELADDR)
fprintf(ofile, " relbase %"PRIx64, data->relbase);
putc('\n', ofile);
if (data->type == OUT_RAWDATA) {
if ((size_t)data->size != data->size) {
fprintf(ofile, " data: <error: impossible size>\n");
} else if (!data->data) {
fprintf(ofile, " data: <error: null pointer>\n");
} else if (dbg_max_data_dump != -1UL &&
data->size > dbg_max_data_dump) {
fprintf(ofile, " data: <%"PRIu64" bytes>\n", data->size);
} else {
size_t i, j;
const uint8_t *bytes = data->data;
for (i = 0; i < data->size; i += 16) {
fprintf(ofile, " data:");
for (j = 0; j < 16; j++) {
if (i+j >= data->size)
fprintf(ofile, " ");
else
fprintf(ofile, "%c%02x",
(j == 8) ? '-' : ' ', bytes[i+j]);
}
fprintf(ofile," ");
for (j = 0; j < 16; j++) {
if (i+j >= data->size) {
putc(' ', ofile);
} else {
if (bytes[i+j] >= 32 && bytes[i+j] <= 126)
putc(bytes[i+j], ofile);
else
putc('.', ofile);
}
}
putc('\n', ofile);
}
}
}
/* This is probably the only place were we'll call this this way... */
nasm_do_legacy_output(data);
}
static void dbg_legacy_out(int32_t segto, const void *data,
enum out_type type, uint64_t size,
int32_t segment, int32_t wrt)
{
int32_t ldata;
if (type == OUT_ADDRESS)
fprintf(ofile, " legacy: out to %"PRIx32", len = %d: ",
segto, (int)abs((int)size));
else
fprintf(ofile, " legacy: out to %"PRIx32", len = %"PRId64" (0x%"PRIx64"): ",
segto, (int64_t)size, size);
switch (type) {
case OUT_RESERVE:
fprintf(ofile, "reserved.\n");
break;
case OUT_RAWDATA:
fprintf(ofile, "rawdata\n"); /* Already have a data dump */
break;
case OUT_ADDRESS:
ldata = *(int64_t *)data;
fprintf(ofile, "addr %08"PRIx32" (seg %08"PRIx32", wrt %08"PRIx32")\n",
ldata, segment, wrt);
break;
case OUT_REL1ADR:
fprintf(ofile, "rel1adr %02"PRIx8" (seg %08"PRIx32")\n",
(uint8_t)*(int64_t *)data, segment);
break;
case OUT_REL2ADR:
fprintf(ofile, "rel2adr %04"PRIx16" (seg %08"PRIx32")\n",
(uint16_t)*(int64_t *)data, segment);
break;
case OUT_REL4ADR:
fprintf(ofile, "rel4adr %08"PRIx32" (seg %08"PRIx32")\n",
(uint32_t)*(int64_t *)data,
segment);
break;
case OUT_REL8ADR:
fprintf(ofile, "rel8adr %016"PRIx64" (seg %08"PRIx32")\n",
(uint64_t)*(int64_t *)data, segment);
break;
default:
fprintf(ofile, "unknown\n");
break;
}
}
static void dbg_sectalign(int32_t seg, unsigned int value)
{
fprintf(ofile, "set alignment (%d) for segment (%u)\n",
seg, value);
}
static enum directive_result
dbg_directive(enum directive directive, char *value, int pass)
{
switch (directive) {
/*
* The .obj GROUP directive is nontrivial to emulate in a macro.
* It effectively creates a "pseudo-section" containing the first
* space-separated argument; the rest we ignore.
*/
case D_GROUP:
{
int dummy;
dbg_add_section(value, pass, &dummy, "directive:group");
break;
}
default:
break;
}
fprintf(ofile, "directive [%s] value [%s] (pass %d)\n",
directive_dname(directive), value, pass);
return DIRR_OK;
}
static enum directive_result
dbg_pragma(const struct pragma *pragma);
static const struct pragma_facility dbg_pragma_list[] = {
{ NULL, dbg_pragma }
};
static enum directive_result
dbg_pragma(const struct pragma *pragma)
{
fprintf(ofile, "pragma %s(%s) %s[%s] %s\n",
pragma->facility_name,
pragma->facility->name ? pragma->facility->name : "<default>",
pragma->opname, directive_dname(pragma->opcode),
pragma->tail);
if (pragma->facility == &dbg_pragma_list[0]) {
switch (pragma->opcode) {
case D_MAXDUMP:
if (!nasm_stricmp(pragma->tail, "unlimited")) {
dbg_max_data_dump = -1UL;
} else {
char *ep;
unsigned long arg;
errno = 0;
arg = strtoul(pragma->tail, &ep, 0);
if (errno || *nasm_skip_spaces(ep)) {
nasm_error(ERR_WARNING | ERR_WARN_BAD_PRAGMA | ERR_PASS2,
"invalid %%pragma dbg maxdump argument");
return DIRR_ERROR;
} else {
dbg_max_data_dump = arg;
}
}
break;
case D_NOSECLABELS:
section_labels = false;
break;
case D_SUBSECTIONS_VIA_SYMBOLS:
subsections_via_symbols = true;
break;
default:
break;
}
}
return DIRR_OK;
}
static const char * const types[] = {
"unknown", "label", "byte", "word", "dword", "float", "qword", "tbyte"
};
static void dbgdbg_init(void)
{
fprintf(ofile, " With debug info\n");
}
static void dbgdbg_cleanup(void)
{
}
static void dbgdbg_linnum(const char *lnfname, int32_t lineno, int32_t segto)
{
fprintf(ofile, "dbglinenum %s(%"PRId32") segment %"PRIx32"\n",
lnfname, lineno, segto);
}
static void dbgdbg_deflabel(char *name, int32_t segment,
int64_t offset, int is_global, char *special)
{
fprintf(ofile, "dbglabel %s := %08"PRIx32":%016"PRIx64" %s (%d)%s%s\n",
name,
segment, offset,
is_global == 2 ? "common" : is_global ? "global" : "local",
is_global, special ? ": " : "", special);
}
static void dbgdbg_define(const char *type, const char *params)
{
fprintf(ofile, "dbgdirective [%s] value [%s]\n", type, params);
}
static void dbgdbg_output(int output_type, void *param)
{
(void)output_type;
(void)param;
}
static void dbgdbg_typevalue(int32_t type)
{
fprintf(ofile, "new type: %s(%"PRIX32")\n",
types[TYM_TYPE(type) >> 3], TYM_ELEMENTS(type));
}
static const struct pragma_facility dbgdbg_pragma_list[] = {
{ "dbgdbg", dbg_pragma },
{ NULL, dbg_pragma } /* Won't trigger, "debug" is a reserved ns */
};
static const struct dfmt debug_debug_form = {
"Trace of all info passed to debug stage",
"debug",
dbgdbg_init,
dbgdbg_linnum,
dbgdbg_deflabel,
dbgdbg_define,
dbgdbg_typevalue,
dbgdbg_output,
dbgdbg_cleanup,
dbgdbg_pragma_list
};
static const struct dfmt * const debug_debug_arr[3] = {
&debug_debug_form,
&null_debug_form,
NULL
};
extern macros_t dbg_stdmac[];
const struct ofmt of_dbg = {
"Trace of all info passed to output stage",
"dbg",
".dbg",
OFMT_TEXT,
64,
debug_debug_arr,
&debug_debug_form,
dbg_stdmac,
dbg_init,
dbg_reset,
dbg_out,
dbg_legacy_out,
dbg_deflabel,
dbg_section_names,
dbg_herelabel,
dbg_sectalign,
null_segbase,
dbg_directive,
dbg_cleanup,
dbg_pragma_list
};
#endif /* OF_DBG */
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