/* unwind-ia64.c -- utility routines to dump IA-64 unwind info for readelf.
- Copyright (C) 2000-2014 Free Software Foundation, Inc.
+ Copyright (C) 2000-2019 Free Software Foundation, Inc.
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
MA 02110-1301, USA. */
#include "config.h"
+#include "sysdep.h"
#include "unwind-ia64.h"
-#include <stdio.h>
-#include <string.h>
#if __GNUC__ >= 2
/* Define BFD64 here, even if our default architecture is 32 bit ELF
typedef bfd_vma unw_word;
#define UNW_DEC_BAD_CODE(code) \
- printf ("Unknown code 0x%02x\n", code)
+ printf (_("Unknown code 0x%02x\n"), code)
#define UNW_DEC_PROLOGUE(fmt, body, rlen, arg) \
do \
printf ("\t%s:spill_base(pspoff=0x10-0x%lx)\n", \
fmt, 4*(unsigned long)pspoff)
-#define UNW_DEC_SPILL_MASK(fmt, dp, arg) \
- do \
- { \
- static const char *spill_type = "-frb"; \
+#define UNW_DEC_SPILL_MASK(fmt, dp, arg, end) \
+ do \
+ { \
+ static const char *spill_type = "-frb"; \
unsigned const char *imaskp = dp; \
- unsigned char mask = 0; \
- bfd_vma insn = 0; \
- \
+ unsigned char mask = 0; \
+ bfd_vma insn = 0; \
+ \
+ /* PR 18420. */ \
+ if ((dp + (unw_rlen / 4)) > end) \
+ { \
+ printf (_("\nERROR: unwind length too long (0x%lx > 0x%lx)\n\n"), \
+ (long) (unw_rlen / 4), (long)(end - dp)); \
+ /* FIXME: Should we reset unw_rlen ? */ \
+ break; \
+ } \
printf ("\t%s:spill_mask(imask=[", fmt); \
for (insn = 0; insn < unw_rlen; ++insn) \
{ \
* UNW_DEC_SPILL_SPREL_P(fmt,qp,t,abreg,pspoff,arg)
*/
-static unw_word unw_decode_uleb128 (const unsigned char **);
-static const unsigned char *unw_decode_x1
- (const unsigned char *, unsigned int, void *);
-static const unsigned char *unw_decode_x2
- (const unsigned char *, unsigned int, void *);
-static const unsigned char *unw_decode_x3
- (const unsigned char *, unsigned int, void *);
-static const unsigned char *unw_decode_x4
- (const unsigned char *, unsigned int, void *);
-static const unsigned char *unw_decode_r1
- (const unsigned char *, unsigned int, void *);
-static const unsigned char *unw_decode_r2
- (const unsigned char *, unsigned int, void *);
-static const unsigned char *unw_decode_r3
- (const unsigned char *, unsigned int, void *);
-static const unsigned char *unw_decode_p1
- (const unsigned char *, unsigned int, void *);
-static const unsigned char *unw_decode_p2_p5
- (const unsigned char *, unsigned int, void *);
-static const unsigned char *unw_decode_p6
- (const unsigned char *, unsigned int, void *);
-static const unsigned char *unw_decode_p7_p10
- (const unsigned char *, unsigned int, void *);
-static const unsigned char *unw_decode_b1
- (const unsigned char *, unsigned int, void *);
-static const unsigned char *unw_decode_b2
- (const unsigned char *, unsigned int, void *);
-static const unsigned char *unw_decode_b3_x4
- (const unsigned char *, unsigned int, void *);
-
static unw_word
-unw_decode_uleb128 (const unsigned char **dpp)
+unw_decode_uleb128 (const unsigned char **dpp, const unsigned char * end)
{
unsigned shift = 0;
unw_word byte, result = 0;
const unsigned char *bp = *dpp;
- while (1)
+ while (bp < end)
{
byte = *bp++;
result |= (byte & 0x7f) << shift;
static const unsigned char *
unw_decode_x1 (const unsigned char *dp, unsigned int code ATTRIBUTE_UNUSED,
- void *arg ATTRIBUTE_UNUSED)
+ void *arg ATTRIBUTE_UNUSED, const unsigned char * end)
{
unsigned char byte1, abreg;
unw_word t, off;
+ if ((end - dp) < 3)
+ {
+ printf (_("\t<corrupt X1>\n"));
+ return end;
+ }
+
byte1 = *dp++;
- t = unw_decode_uleb128 (&dp);
- off = unw_decode_uleb128 (&dp);
+ t = unw_decode_uleb128 (&dp, end);
+ off = unw_decode_uleb128 (&dp, end);
abreg = (byte1 & 0x7f);
if (byte1 & 0x80)
UNW_DEC_SPILL_SPREL ("X1", t, abreg, off, arg);
static const unsigned char *
unw_decode_x2 (const unsigned char *dp, unsigned int code ATTRIBUTE_UNUSED,
- void *arg ATTRIBUTE_UNUSED)
+ void *arg ATTRIBUTE_UNUSED, const unsigned char * end)
{
unsigned char byte1, byte2, abreg, x, ytreg;
unw_word t;
+ if ((end - dp) < 3)
+ {
+ printf (_("\t<corrupt X2>\n"));
+ return end;
+ }
+
byte1 = *dp++;
byte2 = *dp++;
- t = unw_decode_uleb128 (&dp);
+ t = unw_decode_uleb128 (&dp, end);
abreg = (byte1 & 0x7f);
ytreg = byte2;
x = (byte1 >> 7) & 1;
static const unsigned char *
unw_decode_x3 (const unsigned char *dp, unsigned int code ATTRIBUTE_UNUSED,
- void *arg ATTRIBUTE_UNUSED)
+ void *arg ATTRIBUTE_UNUSED, const unsigned char * end)
{
unsigned char byte1, byte2, abreg, qp;
unw_word t, off;
+ if ((end - dp) < 4)
+ {
+ printf (_("\t<corrupt X3>\n"));
+ return end;
+ }
+
byte1 = *dp++;
byte2 = *dp++;
- t = unw_decode_uleb128 (&dp);
- off = unw_decode_uleb128 (&dp);
+ t = unw_decode_uleb128 (&dp, end);
+ off = unw_decode_uleb128 (&dp, end);
qp = (byte1 & 0x3f);
abreg = (byte2 & 0x7f);
static const unsigned char *
unw_decode_x4 (const unsigned char *dp, unsigned int code ATTRIBUTE_UNUSED,
- void *arg ATTRIBUTE_UNUSED)
+ void *arg ATTRIBUTE_UNUSED, const unsigned char * end)
{
unsigned char byte1, byte2, byte3, qp, abreg, x, ytreg;
unw_word t;
+ if ((end - dp) < 4)
+ {
+ printf (_("\t<corrupt X4>\n"));
+ return end;
+ }
+
byte1 = *dp++;
byte2 = *dp++;
byte3 = *dp++;
- t = unw_decode_uleb128 (&dp);
+ t = unw_decode_uleb128 (&dp, end);
qp = (byte1 & 0x3f);
abreg = (byte2 & 0x7f);
}
static const unsigned char *
-unw_decode_r1 (const unsigned char *dp, unsigned int code, void *arg)
+unw_decode_r1 (const unsigned char *dp, unsigned int code, void *arg,
+ const unsigned char * end ATTRIBUTE_UNUSED)
{
int body = (code & 0x20) != 0;
unw_word rlen;
}
static const unsigned char *
-unw_decode_r2 (const unsigned char *dp, unsigned int code, void *arg)
+unw_decode_r2 (const unsigned char *dp, unsigned int code, void *arg,
+ const unsigned char * end)
{
unsigned char byte1, mask, grsave;
unw_word rlen;
+ if ((end - dp) < 2)
+ {
+ printf (_("\t<corrupt R2>\n"));
+ return end;
+ }
+
byte1 = *dp++;
mask = ((code & 0x7) << 1) | ((byte1 >> 7) & 1);
grsave = (byte1 & 0x7f);
- rlen = unw_decode_uleb128 (& dp);
+ rlen = unw_decode_uleb128 (& dp, end);
UNW_DEC_PROLOGUE_GR ("R2", rlen, mask, grsave, arg);
return dp;
}
static const unsigned char *
-unw_decode_r3 (const unsigned char *dp, unsigned int code, void *arg)
+unw_decode_r3 (const unsigned char *dp, unsigned int code, void *arg,
+ const unsigned char * end)
{
unw_word rlen;
- rlen = unw_decode_uleb128 (& dp);
+ rlen = unw_decode_uleb128 (& dp, end);
UNW_DEC_PROLOGUE ("R3", ((code & 0x3) == 1), rlen, arg);
return dp;
}
static const unsigned char *
unw_decode_p1 (const unsigned char *dp, unsigned int code,
- void *arg ATTRIBUTE_UNUSED)
+ void *arg ATTRIBUTE_UNUSED,
+ const unsigned char * end ATTRIBUTE_UNUSED)
{
unsigned char brmask = (code & 0x1f);
static const unsigned char *
unw_decode_p2_p5 (const unsigned char *dp, unsigned int code,
- void *arg ATTRIBUTE_UNUSED)
+ void *arg ATTRIBUTE_UNUSED,
+ const unsigned char * end)
{
if ((code & 0x10) == 0)
{
- unsigned char byte1 = *dp++;
+ unsigned char byte1;
+
+ if ((end - dp) < 1)
+ {
+ printf (_("\t<corrupt P2>\n"));
+ return end;
+ }
+
+ byte1 = *dp++;
UNW_DEC_BR_GR ("P2", ((code & 0xf) << 1) | ((byte1 >> 7) & 1),
(byte1 & 0x7f), arg);
}
else if ((code & 0x08) == 0)
{
- unsigned char byte1 = *dp++, r, dst;
+ unsigned char byte1, r, dst;
+
+ if ((end - dp) < 1)
+ {
+ printf (_("\t<corrupt P3>\n"));
+ return end;
+ }
+
+ byte1 = *dp++;
r = ((code & 0x7) << 1) | ((byte1 >> 7) & 1);
dst = (byte1 & 0x7f);
}
}
else if ((code & 0x7) == 0)
- UNW_DEC_SPILL_MASK ("P4", dp, arg);
+ UNW_DEC_SPILL_MASK ("P4", dp, arg, end);
else if ((code & 0x7) == 1)
{
unw_word grmask, frmask, byte1, byte2, byte3;
+ if ((end - dp) < 3)
+ {
+ printf (_("\t<corrupt P5>\n"));
+ return end;
+ }
byte1 = *dp++;
byte2 = *dp++;
byte3 = *dp++;
static const unsigned char *
unw_decode_p6 (const unsigned char *dp, unsigned int code,
- void *arg ATTRIBUTE_UNUSED)
+ void *arg ATTRIBUTE_UNUSED,
+ const unsigned char * end ATTRIBUTE_UNUSED)
{
int gregs = (code & 0x10) != 0;
unsigned char mask = (code & 0x0f);
}
static const unsigned char *
-unw_decode_p7_p10 (const unsigned char *dp, unsigned int code, void *arg)
+unw_decode_p7_p10 (const unsigned char *dp, unsigned int code, void *arg,
+ const unsigned char * end)
{
unsigned char r, byte1, byte2;
unw_word t, size;
if ((code & 0x10) == 0)
{
r = (code & 0xf);
- t = unw_decode_uleb128 (&dp);
+ t = unw_decode_uleb128 (&dp, end);
switch (r)
{
case 0:
- size = unw_decode_uleb128 (&dp);
+ size = unw_decode_uleb128 (&dp, end);
UNW_DEC_MEM_STACK_F ("P7", t, size, arg);
break;
{
case 0x0: /* p8 */
{
+ if ((end - dp) < 2)
+ {
+ printf (_("\t<corrupt P8>\n"));
+ return end;
+ }
+
r = *dp++;
- t = unw_decode_uleb128 (&dp);
+ t = unw_decode_uleb128 (&dp, end);
switch (r)
{
case 1:
break;
case 0x1:
+ if ((end - dp) < 2)
+ {
+ printf (_("\t<corrupt P9>\n"));
+ return end;
+ }
+
byte1 = *dp++;
byte2 = *dp++;
UNW_DEC_GR_GR ("P9", (byte1 & 0xf), (byte2 & 0x7f), arg);
break;
case 0xf: /* p10 */
+ if ((end - dp) < 2)
+ {
+ printf (_("\t<corrupt P10>\n"));
+ return end;
+ }
+
byte1 = *dp++;
byte2 = *dp++;
UNW_DEC_ABI ("P10", byte1, byte2, arg);
break;
case 0x9:
- return unw_decode_x1 (dp, code, arg);
+ return unw_decode_x1 (dp, code, arg, end);
case 0xa:
- return unw_decode_x2 (dp, code, arg);
+ return unw_decode_x2 (dp, code, arg, end);
case 0xb:
- return unw_decode_x3 (dp, code, arg);
+ return unw_decode_x3 (dp, code, arg, end);
case 0xc:
- return unw_decode_x4 (dp, code, arg);
+ return unw_decode_x4 (dp, code, arg, end);
default:
UNW_DEC_BAD_CODE (code);
static const unsigned char *
unw_decode_b1 (const unsigned char *dp, unsigned int code,
- void *arg ATTRIBUTE_UNUSED)
+ void *arg ATTRIBUTE_UNUSED,
+ const unsigned char * end ATTRIBUTE_UNUSED)
{
unw_word label = (code & 0x1f);
static const unsigned char *
unw_decode_b2 (const unsigned char *dp, unsigned int code,
- void *arg ATTRIBUTE_UNUSED)
+ void *arg ATTRIBUTE_UNUSED,
+ const unsigned char * end)
{
unw_word t;
- t = unw_decode_uleb128 (& dp);
+ t = unw_decode_uleb128 (& dp, end);
UNW_DEC_EPILOGUE ("B2", t, (code & 0x1f), arg);
return dp;
}
static const unsigned char *
-unw_decode_b3_x4 (const unsigned char *dp, unsigned int code, void *arg)
+unw_decode_b3_x4 (const unsigned char *dp, unsigned int code, void *arg,
+ const unsigned char * end)
{
unw_word t, ecount, label;
if ((code & 0x10) == 0)
{
- t = unw_decode_uleb128 (&dp);
- ecount = unw_decode_uleb128 (&dp);
+ t = unw_decode_uleb128 (&dp, end);
+ ecount = unw_decode_uleb128 (&dp, end);
UNW_DEC_EPILOGUE ("B3", t, ecount, arg);
}
else if ((code & 0x07) == 0)
{
- label = unw_decode_uleb128 (&dp);
+ label = unw_decode_uleb128 (&dp, end);
if ((code & 0x08) != 0)
UNW_DEC_COPY_STATE ("B4", label, arg);
else
switch (code & 0x7)
{
case 1:
- return unw_decode_x1 (dp, code, arg);
+ return unw_decode_x1 (dp, code, arg, end);
case 2:
- return unw_decode_x2 (dp, code, arg);
+ return unw_decode_x2 (dp, code, arg, end);
case 3:
- return unw_decode_x3 (dp, code, arg);
+ return unw_decode_x3 (dp, code, arg, end);
case 4:
- return unw_decode_x4 (dp, code, arg);
+ return unw_decode_x4 (dp, code, arg, end);
default:
UNW_DEC_BAD_CODE (code);
break;
}
typedef const unsigned char *(*unw_decoder)
- (const unsigned char *, unsigned int, void *);
+ (const unsigned char *, unsigned int, void *, const unsigned char *);
static const unw_decoder unw_decode_table[2][8] =
{
/* Decode one descriptor and return address of next descriptor. */
const unsigned char *
unw_decode (const unsigned char *dp, int inside_body,
- void *ptr_inside_body)
+ void *ptr_inside_body, const unsigned char * end)
{
unw_decoder decoder;
unsigned char code;
+ if ((end - dp) < 1)
+ {
+ printf (_("\t<corrupt IA64 descriptor>\n"));
+ return end;
+ }
+
code = *dp++;
decoder = unw_decode_table[inside_body][code >> 5];
- return (*decoder) (dp, code, ptr_inside_body);
+ return (*decoder) (dp, code, ptr_inside_body, end);
}
projects / deliverable / binutils-gdb.git / blobdiff