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binutils/backport-0001-CVE-2021-42574.patch

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Fix CVE-2021-42574
2022-01-19 18:02:07 +08:00
From b3aa80b45c4f46029efeb204bb9f2d2c4278a0e5 Mon Sep 17 00:00:00 2001
From: Nick Clifton <nickc@redhat.com>
Date: Tue, 9 Nov 2021 13:25:42 +0000
Subject: [PATCH] Add --unicode option to control how unicode characters are
handled by display tools.
* nm.c: Add --unicode option to control how unicode characters are
handled.
* objdump.c: Likewise.
* readelf.c: Likewise.
* strings.c: Likewise.
* binutils.texi: Document the new feature.
* NEWS: Document the new feature.
* testsuite/binutils-all/unicode.exp: New file.
* testsuite/binutils-all/nm.hex.unicode
* testsuite/binutils-all/strings.escape.unicode
* testsuite/binutils-all/objdump.highlight.unicode
* testsuite/binutils-all/readelf.invalid.unicode
Conflict:Context adaptation
---
binutils/NEWS | 9 +
binutils/doc/binutils.texi | 78 +++++
binutils/nm.c | 225 ++++++++++++-
binutils/objdump.c | 190 ++++++++++-
binutils/readelf.c | 190 ++++++++++-
binutils/strings.c | 766 ++++++++++++++++++++++++++++++++++++++++-----
6 files changed, 1363 insertions(+), 95 deletions(-)
diff --git a/binutils/NEWS b/binutils/NEWS
index 1650a3a..1659a99 100644
--- a/binutils/NEWS
+++ b/binutils/NEWS
@@ -712,6 +712,15 @@ Changes in binutils 2.1:
* The strip and copy programs now have options to remove debug-symbols only
and/or local symbols only. They now also support long options.
+* Tools which display symbols or strings (readelf, strings, nm, objdump)
+ have a new command line option which controls how unicode characters are
+ handled. By default they are treated as normal for the tool. Using
+ --unicode=locale will display them according to the current locale.
+ Using --unicode=hex will display them as hex byte values, whilst
+ --unicode=escape will display them as escape sequences. In addition
+ using --unicode=highlight will display them as unicode escape sequences
+ highlighted in red (if supported by the output device).
+
Copyright (C) 2012-2020 Free Software Foundation, Inc.
diff --git a/binutils/doc/binutils.texi b/binutils/doc/binutils.texi
index 669bee9..80fc864 100644
--- a/binutils/doc/binutils.texi
+++ b/binutils/doc/binutils.texi
@@ -792,6 +792,7 @@ nm [@option{-A}|@option{-o}|@option{--print-file-name}] [@option{-a}|@option{--d
[@option{-r}|@option{--reverse-sort}] [@option{-S}|@option{--print-size}]
[@option{-s}|@option{--print-armap}] [@option{-t} @var{radix}|@option{--radix=}@var{radix}]
[@option{-u}|@option{--undefined-only}] [@option{-V}|@option{--version}]
+ [@option{-U} @var{method}] [@option{--unicode=}@var{method}]
[@option{-X 32_64}] [@option{--defined-only}] [@option{--no-demangle}]
[@option{--plugin} @var{name}]
[@option{--no-recurse-limit}|@option{--recurse-limit}]]
@@ -1075,6 +1076,21 @@ Use @var{radix} as the radix for printing the symbol values. It must be
@cindex undefined symbols
Display only undefined symbols (those external to each object file).
+@item -U @var{[d|i|l|e|x|h]}
+@itemx --unicode=@var{[default|invalid|locale|escape|hex|highlight]}
+Controls the display of UTF-8 encoded mulibyte characters in strings.
+The default (@option{--unicode=default}) is to give them no special
+treatment. The @option{--unicode=locale} option displays the sequence
+in the current locale, which may or may not support them. The options
+@option{--unicode=hex} and @option{--unicode=invalid} display them as
+hex byte sequences enclosed by either angle brackets or curly braces.
+
+The @option{--unicode=escape} option displays them as escape sequences
+(@var{\uxxxx}) and the @option{--unicode=highlight} option displays
+them as escape sequences highlighted in red (if supported by the
+output device). The colouring is intended to draw attention to the
+presence of unicode sequences where they might not be expected.
+
@item -V
@itemx --version
Show the version number of @command{nm} and exit.
@@ -2170,6 +2186,7 @@ objdump [@option{-a}|@option{--archive-headers}]
[@option{--prefix-strip=}@var{level}]
[@option{--insn-width=}@var{width}]
[@option{--visualize-jumps[=color|=extended-color|=off]}
+ [@option{-U} @var{method}] [@option{--unicode=}@var{method}]
[@option{-V}|@option{--version}]
[@option{-H}|@option{--help}]
@var{objfile}@dots{}
@@ -2831,6 +2848,21 @@ When displaying symbols include those which the target considers to be
special in some way and which would not normally be of interest to the
user.
+@item -U @var{[d|i|l|e|x|h]}
+@itemx --unicode=@var{[default|invalid|locale|escape|hex|highlight]}
+Controls the display of UTF-8 encoded mulibyte characters in strings.
+The default (@option{--unicode=default}) is to give them no special
+treatment. The @option{--unicode=locale} option displays the sequence
+in the current locale, which may or may not support them. The options
+@option{--unicode=hex} and @option{--unicode=invalid} display them as
+hex byte sequences enclosed by either angle brackets or curly braces.
+
+The @option{--unicode=escape} option displays them as escape sequences
+(@var{\uxxxx}) and the @option{--unicode=highlight} option displays
+them as escape sequences highlighted in red (if supported by the
+output device). The colouring is intended to draw attention to the
+presence of unicode sequences where they might not be expected.
+
@item -V
@itemx --version
Print the version number of @command{objdump} and exit.
@@ -3107,6 +3139,7 @@ strings [@option{-afovV}] [@option{-}@var{min-len}]
[@option{-n} @var{min-len}] [@option{--bytes=}@var{min-len}]
[@option{-t} @var{radix}] [@option{--radix=}@var{radix}]
[@option{-e} @var{encoding}] [@option{--encoding=}@var{encoding}]
+ [@option{-U} @var{method}] [@option{--unicode=}@var{method}]
[@option{-}] [@option{--all}] [@option{--print-file-name}]
[@option{-T} @var{bfdname}] [@option{--target=}@var{bfdname}]
[@option{-w}] [@option{--include-all-whitespace}]
@@ -3198,6 +3231,28 @@ single-8-bit-byte characters, @samp{b} = 16-bit bigendian, @samp{l} =
littleendian. Useful for finding wide character strings. (@samp{l}
and @samp{b} apply to, for example, Unicode UTF-16/UCS-2 encodings).
+@item -U @var{[d|i|l|e|x|h]}
+@itemx --unicode=@var{[default|invalid|locale|escape|hex|highlight]}
+Controls the display of UTF-8 encoded mulibyte characters in strings.
+The default (@option{--unicode=default}) is to give them no special
+treatment, and instead rely upon the setting of the
+@option{--encoding} option. The other values for this option
+automatically enable @option{--encoding=S}.
+
+The @option{--unicode=invalid} option treats them as non-graphic
+characters and hence not part of a valid string. All the remaining
+options treat them as valid string characters.
+
+The @option{--unicode=locale} option displays them in the current
+locale, which may or may not support UTF-8 encoding. The
+@option{--unicode=hex} option displays them as hex byte sequences
+enclosed between @var{<>} characters. The @option{--unicode=escape}
+option displays them as escape sequences (@var{\uxxxx}) and the
+@option{--unicode=highlight} option displays them as escape sequences
+highlighted in red (if supported by the output device). The colouring
+is intended to draw attention to the presence of unicode sequences
+where they might not be expected.
+
@item -T @var{bfdname}
@itemx --target=@var{bfdname}
@cindex object code format
@@ -4690,6 +4745,7 @@ readelf [@option{-a}|@option{--all}]
[@option{-e}|@option{--headers}]
[@option{-s}|@option{--syms}|@option{--symbols}]
[@option{--dyn-syms}]
+ [@option{-U} @var{method}|@option{--unicode=}@var{method}]
[@option{-n}|@option{--notes}]
[@option{-r}|@option{--relocs}]
[@option{-u}|@option{--unwind}]
@@ -4803,6 +4859,28 @@ Displays the entries in dynamic symbol table section of the file, if it
has one. The output format is the same as the format used by the
@option{--syms} option.
+@item -U @var{[d|i|l|e|x|h]}
+@itemx --unicode=[default|invalid|locale|escape|hex|highlight]
+Controls the display of non-ASCII characters in identifier names.
+The default (@option{--unicode=locale} or @option{--unicode=default}) is
+to treat them as multibyte characters and display them in the current
+locale. All other versions of this option treat the bytes as UTF-8
+encoded values and attempt to interpret them. If they cannot be
+interpreted or if the @option{--unicode=invalid} option is used then
+they are displayed as a sequence of hex bytes, encloses in curly
+parethesis characters.
+
+Using the @option{--unicode=escape} option will display the characters
+as as unicode escape sequences (@var{\uxxxx}). Using the
+@option{--unicode=hex} will display the characters as hex byte
+sequences enclosed between angle brackets.
+
+Using the @option{--unicode=highlight} will display the characters as
+unicode escape sequences but it will also highlighted them in red,
+assuming that colouring is supported by the output device. The
+colouring is intended to draw attention to the presence of unicode
+sequences when they might not be expected.
+
@item -e
@itemx --headers
Display all the headers in the file. Equivalent to @option{-h -l -S}.
diff --git a/binutils/nm.c b/binutils/nm.c
index 1c3e866..e6e5b17 100644
--- a/binutils/nm.c
+++ b/binutils/nm.c
@@ -39,6 +39,11 @@
#include "demanguse.h"
#include "plugin-api.h"
#include "plugin.h"
+#include "safe-ctype.h"
+
+#ifndef streq
+#define streq(a,b) (strcmp ((a),(b)) == 0)
+#endif
/* When sorting by size, we use this structure to hold the size and a
pointer to the minisymbol. */
@@ -188,6 +193,18 @@ static const char *plugin_target = NULL;
static bfd *lineno_cache_bfd;
static bfd *lineno_cache_rel_bfd;
+typedef enum unicode_display_type
+{
+ unicode_default = 0,
+ unicode_locale,
+ unicode_escape,
+ unicode_hex,
+ unicode_highlight,
+ unicode_invalid
+} unicode_display_type;
+
+static unicode_display_type unicode_display = unicode_default;
+
enum long_option_values
{
OPTION_TARGET = 200,
@@ -227,6 +244,7 @@ static struct option long_options[] =
{"target", required_argument, 0, OPTION_TARGET},
{"defined-only", no_argument, &defined_only, 1},
{"undefined-only", no_argument, &undefined_only, 1},
+ {"unicode", required_argument, NULL, 'U'},
{"version", no_argument, &show_version, 1},
{"with-symbol-versions", no_argument, &with_symbol_versions, 1},
{0, no_argument, 0, 0}
@@ -277,6 +295,8 @@ usage (FILE *stream, int status)
-t, --radix=RADIX Use RADIX for printing symbol values\n\
--target=BFDNAME Specify the target object format as BFDNAME\n\
-u, --undefined-only Display only undefined symbols\n\
+ -U {d|s|i|x|e|h} Specify how to treat UTF-8 encoded unicode characters\n\
+ --unicode={default|show|invalid|hex|escape|highlight}\n\
--with-symbol-versions Display version strings after symbol names\n\
-X 32_64 (ignored)\n\
@FILE Read options from FILE\n\
@@ -392,6 +412,186 @@ get_coff_symbol_type (const struct internal_syment *sym)
return bufp;
}
+/* Convert a potential UTF-8 encoded sequence in IN into characters in OUT.
+ The conversion format is controlled by the unicode_display variable.
+ Returns the number of characters added to OUT.
+ Returns the number of bytes consumed from IN in CONSUMED.
+ Always consumes at least one byte and displays at least one character. */
+
+static unsigned int
+display_utf8 (const unsigned char * in, char * out, unsigned int * consumed)
+{
+ char * orig_out = out;
+ unsigned int nchars = 0;
+ unsigned int j;
+
+ if (unicode_display == unicode_default)
+ goto invalid;
+
+ if (in[0] < 0xc0)
+ goto invalid;
+
+ if ((in[1] & 0xc0) != 0x80)
+ goto invalid;
+
+ if ((in[0] & 0x20) == 0)
+ {
+ nchars = 2;
+ goto valid;
+ }
+
+ if ((in[2] & 0xc0) != 0x80)
+ goto invalid;
+
+ if ((in[0] & 0x10) == 0)
+ {
+ nchars = 3;
+ goto valid;
+ }
+
+ if ((in[3] & 0xc0) != 0x80)
+ goto invalid;
+
+ nchars = 4;
+
+ valid:
+ switch (unicode_display)
+ {
+ case unicode_locale:
+ /* Copy the bytes into the output buffer as is. */
+ memcpy (out, in, nchars);
+ out += nchars;
+ break;
+
+ case unicode_invalid:
+ case unicode_hex:
+ out += sprintf (out, "%c", unicode_display == unicode_hex ? '<' : '{');
+ out += sprintf (out, "0x");
+ for (j = 0; j < nchars; j++)
+ out += sprintf (out, "%02x", in [j]);
+ out += sprintf (out, "%c", unicode_display == unicode_hex ? '>' : '}');
+ break;
+
+ case unicode_highlight:
+ if (isatty (1))
+ out += sprintf (out, "\x1B[31;47m"); /* Red. */
+ /* Fall through. */
+ case unicode_escape:
+ switch (nchars)
+ {
+ case 2:
+ out += sprintf (out, "\\u%02x%02x",
+ ((in[0] & 0x1c) >> 2),
+ ((in[0] & 0x03) << 6) | (in[1] & 0x3f));
+ break;
+
+ case 3:
+ out += sprintf (out, "\\u%02x%02x",
+ ((in[0] & 0x0f) << 4) | ((in[1] & 0x3c) >> 2),
+ ((in[1] & 0x03) << 6) | ((in[2] & 0x3f)));
+ break;
+
+ case 4:
+ out += sprintf (out, "\\u%02x%02x%02x",
+ ((in[0] & 0x07) << 6) | ((in[1] & 0x3c) >> 2),
+ ((in[1] & 0x03) << 6) | ((in[2] & 0x3c) >> 2),
+ ((in[2] & 0x03) << 6) | ((in[3] & 0x3f)));
+ break;
+ default:
+ /* URG. */
+ break;
+ }
+
+ if (unicode_display == unicode_highlight && isatty (1))
+ out += sprintf (out, "\033[0m"); /* Default colour. */
+ break;
+
+ default:
+ /* URG */
+ break;
+ }
+
+ * consumed = nchars;
+ return out - orig_out;
+
+ invalid:
+ /* Not a valid UTF-8 sequence. */
+ *out = *in;
+ * consumed = 1;
+ return 1;
+}
+
+/* Convert any UTF-8 encoded characters in NAME into the form specified by
+ unicode_display. Also converts control characters. Returns a static
+ buffer if conversion was necessary.
+ Code stolen from objdump.c:sanitize_string(). */
+
+static const char *
+convert_utf8 (const char * in)
+{
+ static char * buffer = NULL;
+ static size_t buffer_len = 0;
+ const char * original = in;
+ char * out;
+
+ /* Paranoia. */
+ if (in == NULL)
+ return "";
+
+ /* See if any conversion is necessary.
+ In the majority of cases it will not be needed. */
+ do
+ {
+ unsigned char c = *in++;
+
+ if (c == 0)
+ return original;
+
+ if (ISCNTRL (c))
+ break;
+
+ if (unicode_display != unicode_default && c >= 0xc0)
+ break;
+ }
+ while (1);
+
+ /* Copy the input, translating as needed. */
+ in = original;
+ if (buffer_len < (strlen (in) * 9))
+ {
+ free ((void *) buffer);
+ buffer_len = strlen (in) * 9;
+ buffer = xmalloc (buffer_len + 1);
+ }
+
+ out = buffer;
+ do
+ {
+ unsigned char c = *in++;
+
+ if (c == 0)
+ break;
+
+ if (ISCNTRL (c))
+ {
+ *out++ = '^';
+ *out++ = c + 0x40;
+ }
+ else if (unicode_display != unicode_default && c >= 0xc0)
+ {
+ unsigned int num_consumed;
+
+ out += display_utf8 ((const unsigned char *)(in - 1), out, & num_consumed);
+ in += num_consumed - 1;
+ }
+ else
+ *out++ = c;
+ }
+ while (1);
+
+ *out = 0;
+ return buffer;
+}
/* Print symbol name NAME, read from ABFD, with printf format FORM,
demangling it if requested. */
@@ -410,6 +610,11 @@ print_symname (const char *form, const char *name, bfd *abfd)
}
}
+ if (unicode_display != unicode_default)
+ {
+ name = convert_utf8 (name);
+ }
+
printf (form, name);
}
@@ -1714,7 +1919,7 @@ main (int argc, char **argv)
fatal (_("fatal error: libbfd ABI mismatch"));
set_default_bfd_target ();
- while ((c = getopt_long (argc, argv, "aABCDef:gHhlnopPrSst:uvVvX:",
+ while ((c = getopt_long (argc, argv, "aABCDef:gHhlnopPrSst:uU:vVvX:",
long_options, (int *) 0)) != EOF)
{
switch (c)
@@ -1801,6 +2006,24 @@ main (int argc, char **argv)
case 'u':
undefined_only = 1;
break;
+
+ case 'U':
+ if (streq (optarg, "default") || streq (optarg, "d"))
+ unicode_display = unicode_default;
+ else if (streq (optarg, "locale") || streq (optarg, "l"))
+ unicode_display = unicode_locale;
+ else if (streq (optarg, "escape") || streq (optarg, "e"))
+ unicode_display = unicode_escape;
+ else if (streq (optarg, "invalid") || streq (optarg, "i"))
+ unicode_display = unicode_invalid;
+ else if (streq (optarg, "hex") || streq (optarg, "x"))
+ unicode_display = unicode_hex;
+ else if (streq (optarg, "highlight") || streq (optarg, "h"))
+ unicode_display = unicode_highlight;
+ else
+ fatal (_("invalid argument to -U/--unicode: %s"), optarg);
+ break;
+
case 'V':
show_version = 1;
break;
diff --git a/binutils/objdump.c b/binutils/objdump.c
index e99d663..531a093 100644
--- a/binutils/objdump.c
+++ b/binutils/objdump.c
@@ -205,6 +205,18 @@ static const struct objdump_private_desc * const objdump_private_vectors[] =
/* The list of detected jumps inside a function. */
static struct jump_info *detected_jumps = NULL;
+
+typedef enum unicode_display_type
+{
+ unicode_default = 0,
+ unicode_locale,
+ unicode_escape,
+ unicode_hex,
+ unicode_highlight,
+ unicode_invalid
+} unicode_display_type;
+
+static unicode_display_type unicode_display = unicode_default;
static void usage (FILE *, int) ATTRIBUTE_NORETURN;
static void
@@ -269,6 +281,8 @@ usage (FILE *stream, int status)
--recurse-limit Enable a limit on recursion whilst demangling. [Default]\n\
--no-recurse-limit Disable a limit on recursion whilst demangling\n\
-w, --wide Format output for more than 80 columns\n\
+ -U[d|l|i|x|e|h] Controls the display of UTF-8 unicode characters\n\
+ --unicode=[default|locale|invalid|hex|escape|highlight]\n\
-z, --disassemble-zeroes Do not skip blocks of zeroes when disassembling\n\
--start-address=ADDR Only process data whose address is >= ADDR\n\
--stop-address=ADDR Only process data whose address is < ADDR\n\
@@ -381,6 +395,7 @@ static struct option long_options[]=
{"stop-address", required_argument, NULL, OPTION_STOP_ADDRESS},
{"syms", no_argument, NULL, 't'},
{"target", required_argument, NULL, 'b'},
+ {"unicode", required_argument, NULL, 'U'},
{"version", no_argument, NULL, 'V'},
{"wide", no_argument, NULL, 'w'},
{"prefix", required_argument, NULL, OPTION_PREFIX},
@@ -401,9 +416,121 @@ nonfatal (const char *msg)
exit_status = 1;
}
+/* Convert a potential UTF-8 encoded sequence in IN into characters in OUT.
+ The conversion format is controlled by the unicode_display variable.
+ Returns the number of characters added to OUT.
+ Returns the number of bytes consumed from IN in CONSUMED.
+ Always consumes at least one byte and displays at least one character. */
+
+static unsigned int
+display_utf8 (const unsigned char * in, char * out, unsigned int * consumed)
+{
+ char * orig_out = out;
+ unsigned int nchars = 0;
+ unsigned int j;
+
+ if (unicode_display == unicode_default)
+ goto invalid;
+
+ if (in[0] < 0xc0)
+ goto invalid;
+
+ if ((in[1] & 0xc0) != 0x80)
+ goto invalid;
+
+ if ((in[0] & 0x20) == 0)
+ {
+ nchars = 2;
+ goto valid;
+ }
+
+ if ((in[2] & 0xc0) != 0x80)
+ goto invalid;
+
+ if ((in[0] & 0x10) == 0)
+ {
+ nchars = 3;
+ goto valid;
+ }
+
+ if ((in[3] & 0xc0) != 0x80)
+ goto invalid;
+
+ nchars = 4;
+
+ valid:
+ switch (unicode_display)
+ {
+ case unicode_locale:
+ /* Copy the bytes into the output buffer as is. */
+ memcpy (out, in, nchars);
+ out += nchars;
+ break;
+
+ case unicode_invalid:
+ case unicode_hex:
+ out += sprintf (out, "%c", unicode_display == unicode_hex ? '<' : '{');
+ out += sprintf (out, "0x");
+ for (j = 0; j < nchars; j++)
+ out += sprintf (out, "%02x", in [j]);
+ out += sprintf (out, "%c", unicode_display == unicode_hex ? '>' : '}');
+ break;
+
+ case unicode_highlight:
+ if (isatty (1))
+ out += sprintf (out, "\x1B[31;47m"); /* Red. */
+ /* Fall through. */
+ case unicode_escape:
+ switch (nchars)
+ {
+ case 2:
+ out += sprintf (out, "\\u%02x%02x",
+ ((in[0] & 0x1c) >> 2),
+ ((in[0] & 0x03) << 6) | (in[1] & 0x3f));
+ break;
+
+ case 3:
+ out += sprintf (out, "\\u%02x%02x",
+ ((in[0] & 0x0f) << 4) | ((in[1] & 0x3c) >> 2),
+ ((in[1] & 0x03) << 6) | ((in[2] & 0x3f)));
+ break;
+
+ case 4:
+ out += sprintf (out, "\\u%02x%02x%02x",
+ ((in[0] & 0x07) << 6) | ((in[1] & 0x3c) >> 2),
+ ((in[1] & 0x03) << 6) | ((in[2] & 0x3c) >> 2),
+ ((in[2] & 0x03) << 6) | ((in[3] & 0x3f)));
+ break;
+ default:
+ /* URG. */
+ break;
+ }
+
+ if (unicode_display == unicode_highlight && isatty (1))
+ out += sprintf (out, "\033[0m"); /* Default colour. */
+ break;
+
+ default:
+ /* URG */
+ break;
+ }
+
+ * consumed = nchars;
+ return out - orig_out;
+
+ invalid:
+ /* Not a valid UTF-8 sequence. */
+ *out = *in;
+ * consumed = 1;
+ return 1;
+}
+
/* Returns a version of IN with any control characters
replaced by escape sequences. Uses a static buffer
- if necessary. */
+ if necessary.
+
+ If unicode display is enabled, then also handles the
+ conversion of unicode characters. */
static const char *
sanitize_string (const char * in)
@@ -421,40 +548,50 @@ sanitize_string (const char * in)
of cases it will not be needed. */
do
{
- char c = *in++;
+ unsigned char c = *in++;
if (c == 0)
return original;
if (ISCNTRL (c))
break;
+
+ if (unicode_display != unicode_default && c >= 0xc0)
+ break;
}
while (1);
/* Copy the input, translating as needed. */
in = original;
- if (buffer_len < (strlen (in) * 2))
+ if (buffer_len < (strlen (in) * 9))
{
free ((void *) buffer);
- buffer_len = strlen (in) * 2;
+ buffer_len = strlen (in) * 9;
buffer = xmalloc (buffer_len + 1);
}
out = buffer;
do
{
- char c = *in++;
+ unsigned char c = *in++;
if (c == 0)
break;
- if (!ISCNTRL (c))
- *out++ = c;
- else
+ if (ISCNTRL (c))
{
*out++ = '^';
*out++ = c + 0x40;
}
+ else if (unicode_display != unicode_default && c >= 0xc0)
+ {
+ unsigned int num_consumed;
+
+ out += display_utf8 ((const unsigned char *)(in - 1), out, & num_consumed);
+ in += num_consumed - 1;
+ }
+ else
+ *out++ = c;
}
while (1);
@@ -4367,6 +4504,24 @@ dump_symbols (bfd *abfd ATTRIBUTE_UNUSED, bfd_boolean dynamic)
free (alloc);
}
}
+ else if (unicode_display != unicode_default
+ && name != NULL && *name != '\0')
+ {
+ const char * sanitized_name;
+
+ /* If we want to sanitize the name, we do it here, and
+ temporarily clobber it while calling bfd_print_symbol.
+ FIXME: This is a gross hack. */
+ sanitized_name = sanitize_string (name);
+ if (sanitized_name != name)
+ (*current)->name = sanitized_name;
+ else
+ sanitized_name = NULL;
+ bfd_print_symbol (cur_bfd, stdout, *current,
+ bfd_print_symbol_all);
+ if (sanitized_name != NULL)
+ (*current)->name = name;
+ }
else
bfd_print_symbol (cur_bfd, stdout, *current,
bfd_print_symbol_all);
@@ -5048,7 +5203,7 @@ main (int argc, char **argv)
set_default_bfd_target ();
while ((c = getopt_long (argc, argv,
- "pP:ib:m:M:VvCdDlfFaHhrRtTxsSI:j:wE:zgeGW::",
+ "pP:ib:m:M:U:VvCdDlfFaHhrRtTxsSI:j:wE:zgeGW::",
long_options, (int *) 0))
!= EOF)
{
@@ -5325,6 +5480,23 @@ main (int argc, char **argv)
seenflag = TRUE;
break;
+ case 'U':
+ if (streq (optarg, "default") || streq (optarg, "d"))
+ unicode_display = unicode_default;
+ else if (streq (optarg, "locale") || streq (optarg, "l"))
+ unicode_display = unicode_locale;
+ else if (streq (optarg, "escape") || streq (optarg, "e"))
+ unicode_display = unicode_escape;
+ else if (streq (optarg, "invalid") || streq (optarg, "i"))
+ unicode_display = unicode_invalid;
+ else if (streq (optarg, "hex") || streq (optarg, "x"))
+ unicode_display = unicode_hex;
+ else if (streq (optarg, "highlight") || streq (optarg, "h"))
+ unicode_display = unicode_highlight;
+ else
+ fatal (_("invalid argument to -U/--unicode: %s"), optarg);
+ break;
+
case 'H':
usage (stdout, 0);
/* No need to set seenflag or to break - usage() does not return. */
diff --git a/binutils/readelf.c b/binutils/readelf.c
index 8fc5bfa..f16fd5f 100644
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -299,6 +299,18 @@ typedef enum print_mode
}
print_mode;
+typedef enum unicode_display_type
+{
+ unicode_default = 0,
+ unicode_locale,
+ unicode_escape,
+ unicode_hex,
+ unicode_highlight,
+ unicode_invalid
+} unicode_display_type;
+
+static unicode_display_type unicode_display = unicode_default;
+
/* Versioned symbol info. */
enum versioned_symbol_info
{
@@ -554,11 +566,18 @@ print_symbol (signed int width, const char *symbol)
if (c == 0)
break;
- /* Do not print control characters directly as they can affect terminal
- settings. Such characters usually appear in the names generated
- by the assembler for local labels. */
- if (ISCNTRL (c))
+ if (ISPRINT (c))
+ {
+ putchar (c);
+ width_remaining --;
+ num_printed ++;
+ }
+ else if (ISCNTRL (c))
{
+ /* Do not print control characters directly as they can affect terminal
+ settings. Such characters usually appear in the names generated
+ by the assembler for local labels. */
+
if (width_remaining < 2)
break;
@@ -566,11 +585,137 @@ print_symbol (signed int width, const char *symbol)
width_remaining -= 2;
num_printed += 2;
}
- else if (ISPRINT (c))
+ else if (c == 0x7f)
{
- putchar (c);
- width_remaining --;
- num_printed ++;
+ if (width_remaining < 5)
+ break;
+ printf ("<DEL>");
+ width_remaining -= 5;
+ num_printed += 5;
+ }
+ else if (unicode_display != unicode_locale
+ && unicode_display != unicode_default)
+ {
+ /* Display unicode characters as something else. */
+ unsigned char bytes[4];
+ bfd_boolean is_utf8;
+ unsigned int nbytes;
+
+ bytes[0] = c;
+
+ if (bytes[0] < 0xc0)
+ {
+ nbytes = 1;
+ is_utf8 = FALSE;
+ }
+ else
+ {
+ bytes[1] = *symbol++;
+
+ if ((bytes[1] & 0xc0) != 0x80)
+ {
+ is_utf8 = FALSE;
+ /* Do not consume this character. It may only
+ be the first byte in the sequence that was
+ corrupt. */
+ --symbol;
+ nbytes = 1;
+ }
+ else if ((bytes[0] & 0x20) == 0)
+ {
+ is_utf8 = TRUE;
+ nbytes = 2;
+ }
+ else
+ {
+ bytes[2] = *symbol++;
+
+ if ((bytes[2] & 0xc0) != 0x80)
+ {
+ is_utf8 = FALSE;
+ symbol -= 2;
+ nbytes = 1;
+ }
+ else if ((bytes[0] & 0x10) == 0)
+ {
+ is_utf8 = TRUE;
+ nbytes = 3;
+ }
+ else
+ {
+ bytes[3] = *symbol++;
+
+ nbytes = 4;
+
+ if ((bytes[3] & 0xc0) != 0x80)
+ {
+ is_utf8 = FALSE;
+ symbol -= 3;
+ nbytes = 1;
+ }
+ else
+ is_utf8 = TRUE;
+ }
+ }
+ }
+
+ if (unicode_display == unicode_invalid)
+ is_utf8 = FALSE;
+
+ if (unicode_display == unicode_hex || ! is_utf8)
+ {
+ unsigned int i;
+
+ if (width_remaining < (nbytes * 2) + 2)
+ break;
+
+ putchar (is_utf8 ? '<' : '{');
+ printf ("0x");
+ for (i = 0; i < nbytes; i++)
+ printf ("%02x", bytes[i]);
+ putchar (is_utf8 ? '>' : '}');
+ }
+ else
+ {
+ if (unicode_display == unicode_highlight && isatty (1))
+ printf ("\x1B[31;47m"); /* Red. */
+
+ switch (nbytes)
+ {
+ case 2:
+ if (width_remaining < 6)
+ break;
+ printf ("\\u%02x%02x",
+ (bytes[0] & 0x1c) >> 2,
+ ((bytes[0] & 0x03) << 6) | (bytes[1] & 0x3f));
+ break;
+ case 3:
+ if (width_remaining < 6)
+ break;
+ printf ("\\u%02x%02x",
+ ((bytes[0] & 0x0f) << 4) | ((bytes[1] & 0x3c) >> 2),
+ ((bytes[1] & 0x03) << 6) | (bytes[2] & 0x3f));
+ break;
+ case 4:
+ if (width_remaining < 8)
+ break;
+ printf ("\\u%02x%02x%02x",
+ ((bytes[0] & 0x07) << 6) | ((bytes[1] & 0x3c) >> 2),
+ ((bytes[1] & 0x03) << 6) | ((bytes[2] & 0x3c) >> 2),
+ ((bytes[2] & 0x03) << 6) | (bytes[3] & 0x3f));
+
+ break;
+ default:
+ /* URG. */
+ break;
+ }
+
+ if (unicode_display == unicode_highlight && isatty (1))
+ printf ("\033[0m"); /* Default colour. */
+ }
+
+ if (bytes[nbytes - 1] == 0)
+ break;
}
else
{
@@ -4449,6 +4594,7 @@ static struct option options[] =
{"section-headers", no_argument, 0, 'S'},
{"section-groups", no_argument, 0, 'g'},
{"section-details", no_argument, 0, 't'},
+ {"unicode", required_argument, NULL, 'U'},
{"full-section-name",no_argument, 0, 'N'},
{"symbols", no_argument, 0, 's'},
{"syms", no_argument, 0, 's'},
@@ -4526,6 +4672,12 @@ usage (FILE * stream)
=addr,=cu_index,=links,=follow-links]\n\
Display the contents of DWARF debug sections\n"));
fprintf (stream, _("\
+ -U[dlexhi] --unicode=[default|locale|escape|hex|highlight|invalid]\n\
+ Display unicode characters as determined by the current locale\n\
+ (default), escape sequences, \"<hex sequences>\", highlighted\n\
+ escape sequences, or treat them as invalid and display as\n\
+ \"{hex sequences}\"\n"));
+ fprintf (stream, _("\
--dwarf-depth=N Do not display DIEs at depth N or greater\n\
--dwarf-start=N Display DIEs starting with N, at the same depth\n\
or deeper\n"));
@@ -4639,7 +4791,7 @@ parse_args (Filedata * filedata, int argc, char ** argv)
usage (stderr);
while ((c = getopt_long
- (argc, argv, "ADHINR:SVWacdeghi:lnp:rstuvw::x:z", options, NULL)) != EOF)
+ (argc, argv, "ADHINR:SU:VWacdeghi:lnp:rstuvw::x:z", options, NULL)) != EOF)
{
switch (c)
{
@@ -4795,6 +4947,26 @@ parse_args (Filedata * filedata, int argc, char ** argv)
case 'W':
do_wide = TRUE;
break;
+
+ case 'U':
+ if (optarg == NULL)
+ error (_("Missing arg to -U/--unicode")); /* Can this happen ? */
+ else if (streq (optarg, "default") || streq (optarg, "d"))
+ unicode_display = unicode_default;
+ else if (streq (optarg, "locale") || streq (optarg, "l"))
+ unicode_display = unicode_locale;
+ else if (streq (optarg, "escape") || streq (optarg, "e"))
+ unicode_display = unicode_escape;
+ else if (streq (optarg, "invalid") || streq (optarg, "i"))
+ unicode_display = unicode_invalid;
+ else if (streq (optarg, "hex") || streq (optarg, "x"))
+ unicode_display = unicode_hex;
+ else if (streq (optarg, "highlight") || streq (optarg, "h"))
+ unicode_display = unicode_highlight;
+ else
+ error (_("invalid argument to -U/--unicode: %s"), optarg);
+ break;
+
default:
/* xgettext:c-format */
error (_("Invalid option '-%c'\n"), c);
diff --git a/binutils/strings.c b/binutils/strings.c
index dc42a6f..c6b95dc 100644
--- a/binutils/strings.c
+++ b/binutils/strings.c
@@ -55,6 +55,19 @@
-T {bfdname}
Specify a non-default object file format.
+ --unicode={default|locale|invalid|hex|escape|highlight}
+ -u {d|l|i|x|e|h}
+ Determine how to handle UTF-8 unicode characters. The default
+ is no special treatment. All other versions of this option
+ only apply if the encoding is valid and enabling the option
+ implies --encoding=S.
+ The 'locale' option displays the characters according to the
+ current locale. The 'invalid' option treats them as
+ non-string characters. The 'hex' option displays them as hex
+ byte sequences. The 'escape' option displays them as escape
+ sequences and the 'highlight' option displays them as
+ coloured escape sequences.
+
--output-separator=sep_string
-s sep_string String used to separate parsed strings in output.
Default is newline.
@@ -76,6 +89,22 @@
#include "safe-ctype.h"
#include "bucomm.h"
+#ifndef streq
+#define streq(a,b) (strcmp ((a),(b)) == 0)
+#endif
+
+typedef enum unicode_display_type
+{
+ unicode_default = 0,
+ unicode_locale,
+ unicode_escape,
+ unicode_hex,
+ unicode_highlight,
+ unicode_invalid
+} unicode_display_type;
+
+static unicode_display_type unicode_display = unicode_default;
+
#define STRING_ISGRAPHIC(c) \
( (c) >= 0 \
&& (c) <= 255 \
@@ -94,7 +123,7 @@ extern int errno;
static int address_radix;
/* Minimum length of sequence of graphic chars to trigger output. */
-static int string_min;
+static unsigned int string_min;
/* Whether or not we include all whitespace as a graphic char. */
static bfd_boolean include_all_whitespace;
@@ -130,12 +159,13 @@ static struct option long_options[] =
{"target", required_argument, NULL, 'T'},
{"output-separator", required_argument, NULL, 's'},
{"help", no_argument, NULL, 'h'},
+ {"unicode", required_argument, NULL, 'U'},
{"version", no_argument, NULL, 'v'},
{NULL, 0, NULL, 0}
};
static bfd_boolean strings_file (char *);
-static void print_strings (const char *, FILE *, file_ptr, int, int, char *);
+static void print_strings (const char *, FILE *, file_ptr, int, char *);
static void usage (FILE *, int) ATTRIBUTE_NORETURN;
int main (int, char **);
@@ -173,7 +203,7 @@ main (int argc, char **argv)
encoding = 's';
output_separator = NULL;
- while ((optc = getopt_long (argc, argv, "adfhHn:wot:e:T:s:Vv0123456789",
+ while ((optc = getopt_long (argc, argv, "adfhHn:wot:e:T:s:U:Vv0123456789",
long_options, (int *) 0)) != EOF)
{
switch (optc)
@@ -246,6 +276,23 @@ main (int argc, char **argv)
output_separator = optarg;
break;
+ case 'U':
+ if (streq (optarg, "default") || streq (optarg, "d"))
+ unicode_display = unicode_default;
+ else if (streq (optarg, "locale") || streq (optarg, "l"))
+ unicode_display = unicode_locale;
+ else if (streq (optarg, "escape") || streq (optarg, "e"))
+ unicode_display = unicode_escape;
+ else if (streq (optarg, "invalid") || streq (optarg, "i"))
+ unicode_display = unicode_invalid;
+ else if (streq (optarg, "hex") || streq (optarg, "x"))
+ unicode_display = unicode_hex;
+ else if (streq (optarg, "highlight") || streq (optarg, "h"))
+ unicode_display = unicode_highlight;
+ else
+ fatal (_("invalid argument to -U/--unicode: %s"), optarg);
+ break;
+
case 'V':
case 'v':
print_version ("strings");
@@ -260,6 +307,9 @@ main (int argc, char **argv)
}
}
+ if (unicode_display != unicode_default)
+ encoding = 'S';
+
if (numeric_opt != 0)
{
string_min = (int) strtoul (argv[numeric_opt - 1] + 1, &s, 0);
@@ -295,14 +345,14 @@ main (int argc, char **argv)
{
datasection_only = FALSE;
SET_BINARY (fileno (stdin));
- print_strings ("{standard input}", stdin, 0, 0, 0, (char *) NULL);
+ print_strings ("{standard input}", stdin, 0, 0, (char *) NULL);
files_given = TRUE;
}
else
{
for (; optind < argc; ++optind)
{
- if (strcmp (argv[optind], "-") == 0)
+ if (streq (argv[optind], "-"))
datasection_only = FALSE;
else
{
@@ -344,7 +394,7 @@ strings_a_section (bfd *abfd, asection *sect, const char *filename,
}
*got_a_section = TRUE;
- print_strings (filename, NULL, sect->filepos, 0, sectsize, (char *) mem);
+ print_strings (filename, NULL, sect->filepos, sectsize, (char *) mem);
free (mem);
}
@@ -429,7 +479,7 @@ strings_file (char *file)
return FALSE;
}
- print_strings (file, stream, (file_ptr) 0, 0, 0, (char *) 0);
+ print_strings (file, stream, (file_ptr) 0, 0, (char *) NULL);
if (fclose (stream) == EOF)
{
@@ -553,11 +603,627 @@ unget_part_char (long c, file_ptr *address, int *magiccount, char **magic)
}
}
}
+
+static void
+print_filename_and_address (const char * filename, file_ptr address)
+{
+ if (print_filenames)
+ printf ("%s: ", filename);
+
+ if (! print_addresses)
+ return;
+
+ switch (address_radix)
+ {
+ case 8:
+ if (sizeof (address) > sizeof (long))
+ {
+#ifndef __MSVCRT__
+ printf ("%7llo ", (unsigned long long) address);
+#else
+ printf ("%7I64o ", (unsigned long long) address);
+#endif
+ }
+ else
+ printf ("%7lo ", (unsigned long) address);
+ break;
+
+ case 10:
+ if (sizeof (address) > sizeof (long))
+ {
+#ifndef __MSVCRT__
+ printf ("%7llu ", (unsigned long long) address);
+#else
+ printf ("%7I64d ", (unsigned long long) address);
+#endif
+ }
+ else
+ printf ("%7ld ", (long) address);
+ break;
+
+ case 16:
+ if (sizeof (address) > sizeof (long))
+ {
+#ifndef __MSVCRT__
+ printf ("%7llx ", (unsigned long long) address);
+#else
+ printf ("%7I64x ", (unsigned long long) address);
+#endif
+ }
+ else
+ printf ("%7lx ", (unsigned long) address);
+ break;
+ }
+}
+
+/* Return non-zero if the bytes starting at BUFFER form a valid UTF-8 encoding.
+ If the encoding is valid then returns the number of bytes it uses. */
+
+static unsigned int
+is_valid_utf8 (const unsigned char * buffer, unsigned long buflen)
+{
+ if (buffer[0] < 0xc0)
+ return 0;
+
+ if (buflen < 2)
+ return 0;
+
+ if ((buffer[1] & 0xc0) != 0x80)
+ return 0;
+
+ if ((buffer[0] & 0x20) == 0)
+ return 2;
+
+ if (buflen < 3)
+ return 0;
+
+ if ((buffer[2] & 0xc0) != 0x80)
+ return 0;
+
+ if ((buffer[0] & 0x10) == 0)
+ return 3;
+
+ if (buflen < 4)
+ return 0;
+
+ if ((buffer[3] & 0xc0) != 0x80)
+ return 0;
+
+ return 4;
+}
+
+/* Display a UTF-8 encoded character in BUFFER according to the setting
+ of unicode_display. The character is known to be valid.
+ Returns the number of bytes consumed. */
+
+static unsigned int
+display_utf8_char (const unsigned char * buffer)
+{
+ unsigned int j;
+ unsigned int utf8_len;
+
+ switch (buffer[0] & 0x30)
+ {
+ case 0x00:
+ case 0x10:
+ utf8_len = 2;
+ break;
+ case 0x20:
+ utf8_len = 3;
+ break;
+ default:
+ utf8_len = 4;
+ }
+
+ switch (unicode_display)
+ {
+ default:
+ fprintf (stderr, "ICE: unexpected unicode display type\n");
+ break;
+
+ case unicode_escape:
+ case unicode_highlight:
+ if (unicode_display == unicode_highlight && isatty (1))
+ printf ("\x1B[31;47m"); /* Red. */
+
+ switch (utf8_len)
+ {
+ case 2:
+ printf ("\\u%02x%02x",
+ ((buffer[0] & 0x1c) >> 2),
+ ((buffer[0] & 0x03) << 6) | (buffer[1] & 0x3f));
+ break;
+
+ case 3:
+ printf ("\\u%02x%02x",
+ ((buffer[0] & 0x0f) << 4) | ((buffer[1] & 0x3c) >> 2),
+ ((buffer[1] & 0x03) << 6) | ((buffer[2] & 0x3f)));
+ break;
+
+ case 4:
+ printf ("\\u%02x%02x%02x",
+ ((buffer[0] & 0x07) << 6) | ((buffer[1] & 0x3c) >> 2),
+ ((buffer[1] & 0x03) << 6) | ((buffer[2] & 0x3c) >> 2),
+ ((buffer[2] & 0x03) << 6) | ((buffer[3] & 0x3f)));
+ break;
+ default:
+ /* URG. */
+ break;
+ }
+
+ if (unicode_display == unicode_highlight && isatty (1))
+ printf ("\033[0m"); /* Default colour. */
+ break;
+
+ case unicode_hex:
+ putchar ('<');
+ printf ("0x");
+ for (j = 0; j < utf8_len; j++)
+ printf ("%02x", buffer [j]);
+ putchar ('>');
+ break;
+
+ case unicode_locale:
+ printf ("%.1s", buffer);
+ break;
+ }
+
+ return utf8_len;
+}
+
+/* Display strings in BUFFER. Treat any UTF-8 encoded characters encountered
+ according to the setting of the unicode_display variable. The buffer
+ contains BUFLEN bytes.
+
+ Display the characters as if they started at ADDRESS and are contained in
+ FILENAME. */
+
+static void
+print_unicode_buffer (const char * filename,
+ file_ptr address,
+ const unsigned char * buffer,
+ unsigned long buflen)
+{
+ /* Paranoia checks... */
+ if (filename == NULL
+ || buffer == NULL
+ || unicode_display == unicode_default
+ || encoding != 'S'
+ || encoding_bytes != 1)
+ {
+ fprintf (stderr, "ICE: bad arguments to print_unicode_buffer\n");
+ return;
+ }
+
+ if (buflen == 0)
+ return;
+
+ /* We must only display strings that are at least string_min *characters*
+ long. So we scan the buffer in two stages. First we locate the start
+ of a potential string. Then we walk along it until we have found
+ string_min characters. Then we go back to the start point and start
+ displaying characters according to the unicode_display setting. */
+
+ unsigned long start_point = 0;
+ unsigned long i = 0;
+ unsigned int char_len = 1;
+ unsigned int num_found = 0;
+
+ for (i = 0; i < buflen; i += char_len)
+ {
+ int c = buffer[i];
+
+ char_len = 1;
+
+ /* Find the first potential character of a string. */
+ if (! STRING_ISGRAPHIC (c))
+ {
+ num_found = 0;
+ continue;
+ }
+
+ if (c > 126)
+ {
+ if (c < 0xc0)
+ {
+ num_found = 0;
+ continue;
+ }
+
+ if ((char_len = is_valid_utf8 (buffer + i, buflen - i)) == 0)
+ {
+ char_len = 1;
+ num_found = 0;
+ continue;
+ }
+
+ if (unicode_display == unicode_invalid)
+ {
+ /* We have found a valid UTF-8 character, but we treat it as non-graphic. */
+ num_found = 0;
+ continue;
+ }
+ }
+
+ if (num_found == 0)
+ /* We have found a potential starting point for a string. */
+ start_point = i;
+
+ ++ num_found;
+
+ if (num_found >= string_min)
+ break;
+ }
+
+ if (num_found < string_min)
+ return;
+
+ print_filename_and_address (filename, address + start_point);
+
+ /* We have found string_min characters. Display them and any
+ more that follow. */
+ for (i = start_point; i < buflen; i += char_len)
+ {
+ int c = buffer[i];
+
+ char_len = 1;
+
+ if (! STRING_ISGRAPHIC (c))
+ break;
+ else if (c < 127)
+ putchar (c);
+ else if (! is_valid_utf8 (buffer + i, buflen - i))
+ break;
+ else if (unicode_display == unicode_invalid)
+ break;
+ else
+ char_len = display_utf8_char (buffer + i);
+ }
+
+ if (output_separator)
+ fputs (output_separator, stdout);
+ else
+ putchar ('\n');
+
+ /* FIXME: Using tail recursion here is lazy programming... */
+ print_unicode_buffer (filename, address + i, buffer + i, buflen - i);
+}
+
+static int
+get_unicode_byte (FILE * stream, unsigned char * putback, unsigned int * num_putback, uint * num_read)
+{
+ if (* num_putback > 0)
+ {
+ * num_putback = * num_putback - 1;
+ return putback [* num_putback];
+ }
+
+ * num_read = * num_read + 1;
+
+#if defined(HAVE_GETC_UNLOCKED) && HAVE_DECL_GETC_UNLOCKED
+ return getc_unlocked (stream);
+#else
+ return getc (stream);
+#endif
+}
+
+/* Helper function for print_unicode_stream. */
+
+static void
+print_unicode_stream_body (const char * filename,
+ file_ptr address,
+ FILE * stream,
+ unsigned char * putback_buf,
+ unsigned int num_putback,
+ unsigned char * print_buf)
+{
+ /* It would be nice if we could just read the stream into a buffer
+ and then process if with print_unicode_buffer. But the input
+ might be huge or it might time-locked (eg stdin). So instead
+ we go one byte at a time... */
+
+ file_ptr start_point = 0;
+ unsigned int num_read = 0;
+ unsigned int num_chars = 0;
+ unsigned int num_print = 0;
+ int c = 0;
+
+ /* Find a series of string_min characters. Put them into print_buf. */
+ do
+ {
+ if (num_chars >= string_min)
+ break;
+
+ c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
+ if (c == EOF)
+ break;
+
+ if (! STRING_ISGRAPHIC (c))
+ {
+ num_chars = num_print = 0;
+ continue;
+ }
+
+ if (num_chars == 0)
+ start_point = num_read - 1;
+
+ if (c < 127)
+ {
+ print_buf[num_print] = c;
+ num_chars ++;
+ num_print ++;
+ continue;
+ }
+
+ if (c < 0xc0)
+ {
+ num_chars = num_print = 0;
+ continue;
+ }
+
+ /* We *might* have a UTF-8 sequence. Time to start peeking. */
+ char utf8[4];
+
+ utf8[0] = c;
+ c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
+ if (c == EOF)
+ break;
+ utf8[1] = c;
+
+ if ((utf8[1] & 0xc0) != 0x80)
+ {
+ /* Invalid UTF-8. */
+ putback_buf[num_putback++] = utf8[1];
+ num_chars = num_print = 0;
+ continue;
+ }
+ else if ((utf8[0] & 0x20) == 0)
+ {
+ /* A valid 2-byte UTF-8 encoding. */
+ if (unicode_display == unicode_invalid)
+ {
+ putback_buf[num_putback++] = utf8[1];
+ num_chars = num_print = 0;
+ }
+ else
+ {
+ print_buf[num_print ++] = utf8[0];
+ print_buf[num_print ++] = utf8[1];
+ num_chars ++;
+ }
+ continue;
+ }
+
+ c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
+ if (c == EOF)
+ break;
+ utf8[2] = c;
+
+ if ((utf8[2] & 0xc0) != 0x80)
+ {
+ /* Invalid UTF-8. */
+ putback_buf[num_putback++] = utf8[2];
+ putback_buf[num_putback++] = utf8[1];
+ num_chars = num_print = 0;
+ continue;
+ }
+ else if ((utf8[0] & 0x10) == 0)
+ {
+ /* A valid 3-byte UTF-8 encoding. */
+ if (unicode_display == unicode_invalid)
+ {
+ putback_buf[num_putback++] = utf8[2];
+ putback_buf[num_putback++] = utf8[1];
+ num_chars = num_print = 0;
+ }
+ else
+ {
+ print_buf[num_print ++] = utf8[0];
+ print_buf[num_print ++] = utf8[1];
+ print_buf[num_print ++] = utf8[2];
+ num_chars ++;
+ }
+ continue;
+ }
+
+ c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
+ if (c == EOF)
+ break;
+ utf8[3] = c;
+
+ if ((utf8[3] & 0xc0) != 0x80)
+ {
+ /* Invalid UTF-8. */
+ putback_buf[num_putback++] = utf8[3];
+ putback_buf[num_putback++] = utf8[2];
+ putback_buf[num_putback++] = utf8[1];
+ num_chars = num_print = 0;
+ }
+ /* We have a valid 4-byte UTF-8 encoding. */
+ else if (unicode_display == unicode_invalid)
+ {
+ putback_buf[num_putback++] = utf8[3];
+ putback_buf[num_putback++] = utf8[1];
+ putback_buf[num_putback++] = utf8[2];
+ num_chars = num_print = 0;
+ }
+ else
+ {
+ print_buf[num_print ++] = utf8[0];
+ print_buf[num_print ++] = utf8[1];
+ print_buf[num_print ++] = utf8[2];
+ print_buf[num_print ++] = utf8[3];
+ num_chars ++;
+ }
+ }
+ while (1);
+
+ if (num_chars >= string_min)
+ {
+ /* We know that we have string_min valid characters in print_buf,
+ and there may be more to come in the stream. Start displaying
+ them. */
+
+ print_filename_and_address (filename, address + start_point);
+
+ unsigned int i;
+ for (i = 0; i < num_print;)
+ {
+ if (print_buf[i] < 127)
+ putchar (print_buf[i++]);
+ else
+ i += display_utf8_char (print_buf + i);
+ }
+
+ /* OK so now we have to start read unchecked bytes. */
+
+ /* Find a series of string_min characters. Put them into print_buf. */
+ do
+ {
+ c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
+ if (c == EOF)
+ break;
+
+ if (! STRING_ISGRAPHIC (c))
+ break;
+
+ if (c < 127)
+ {
+ putchar (c);
+ continue;
+ }
+
+ if (c < 0xc0)
+ break;
+
+ /* We *might* have a UTF-8 sequence. Time to start peeking. */
+ unsigned char utf8[4];
+
+ utf8[0] = c;
+ c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
+ if (c == EOF)
+ break;
+ utf8[1] = c;
+
+ if ((utf8[1] & 0xc0) != 0x80)
+ {
+ /* Invalid UTF-8. */
+ putback_buf[num_putback++] = utf8[1];
+ break;
+ }
+ else if ((utf8[0] & 0x20) == 0)
+ {
+ /* Valid 2-byte UTF-8. */
+ if (unicode_display == unicode_invalid)
+ {
+ putback_buf[num_putback++] = utf8[1];
+ break;
+ }
+ else
+ {
+ (void) display_utf8_char (utf8);
+ continue;
+ }
+ }
+
+ c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
+ if (c == EOF)
+ break;
+ utf8[2] = c;
+
+ if ((utf8[2] & 0xc0) != 0x80)
+ {
+ /* Invalid UTF-8. */
+ putback_buf[num_putback++] = utf8[2];
+ putback_buf[num_putback++] = utf8[1];
+ break;
+ }
+ else if ((utf8[0] & 0x10) == 0)
+ {
+ /* Valid 3-byte UTF-8. */
+ if (unicode_display == unicode_invalid)
+ {
+ putback_buf[num_putback++] = utf8[2];
+ putback_buf[num_putback++] = utf8[1];
+ break;
+ }
+ else
+ {
+ (void) display_utf8_char (utf8);
+ continue;
+ }
+ }
+
+ c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
+ if (c == EOF)
+ break;
+ utf8[3] = c;
+
+ if ((utf8[3] & 0xc0) != 0x80)
+ {
+ /* Invalid UTF-8. */
+ putback_buf[num_putback++] = utf8[3];
+ putback_buf[num_putback++] = utf8[2];
+ putback_buf[num_putback++] = utf8[1];
+ break;
+ }
+ else if (unicode_display == unicode_invalid)
+ {
+ putback_buf[num_putback++] = utf8[3];
+ putback_buf[num_putback++] = utf8[2];
+ putback_buf[num_putback++] = utf8[1];
+ break;
+ }
+ else
+ /* A valid 4-byte UTF-8 encoding. */
+ (void) display_utf8_char (utf8);
+ }
+ while (1);
+
+ if (output_separator)
+ fputs (output_separator, stdout);
+ else
+ putchar ('\n');
+ }
+
+ if (c != EOF)
+ /* FIXME: Using tail recursion here is lazy, but it works. */
+ print_unicode_stream_body (filename, address + num_read, stream, putback_buf, num_putback, print_buf);
+}
+
+/* Display strings read in from STREAM. Treat any UTF-8 encoded characters
+ encountered according to the setting of the unicode_display variable.
+ The stream is positioned at ADDRESS and is attached to FILENAME. */
+
+static void
+print_unicode_stream (const char * filename,
+ file_ptr address,
+ FILE * stream)
+{
+ /* Paranoia checks... */
+ if (filename == NULL
+ || stream == NULL
+ || unicode_display == unicode_default
+ || encoding != 'S'
+ || encoding_bytes != 1)
+ {
+ fprintf (stderr, "ICE: bad arguments to print_unicode_stream\n");
+ return;
+ }
+
+ /* Allocate space for string_min 4-byte utf-8 characters. */
+ unsigned char * print_buf = xmalloc ((4 * string_min) + 1);
+ /* We should never have to put back more than 4 bytes. */
+ unsigned char putback_buf[5];
+ unsigned int num_putback = 0;
+
+ print_unicode_stream_body (filename, address, stream, putback_buf, num_putback, print_buf);
+ free (print_buf);
+}
/* Find the strings in file FILENAME, read from STREAM.
Assume that STREAM is positioned so that the next byte read
is at address ADDRESS in the file.
- Stop reading at address STOP_POINT in the file, if nonzero.
If STREAM is NULL, do not read from it.
The caller can supply a buffer of characters
@@ -568,20 +1234,29 @@ unget_part_char (long c, file_ptr *address, int *magiccount, char **magic)
static void
print_strings (const char *filename, FILE *stream, file_ptr address,
- int stop_point, int magiccount, char *magic)
+ int magiccount, char *magic)
{
+ if (unicode_display != unicode_default)
+ {
+ if (magic != NULL)
+ print_unicode_buffer (filename, address,
+ (const unsigned char *) magic, magiccount);
+
+ if (stream != NULL)
+ print_unicode_stream (filename, address, stream);
+ return;
+ }
+
char *buf = (char *) xmalloc (sizeof (char) * (string_min + 1));
while (1)
{
file_ptr start;
- int i;
+ unsigned int i;
long c;
/* See if the next `string_min' chars are all graphic chars. */
tryline:
- if (stop_point && address >= stop_point)
- break;
start = address;
for (i = 0; i < string_min; i++)
{
@@ -603,70 +1278,7 @@ print_strings (const char *filename, FILE *stream, file_ptr address,
/* We found a run of `string_min' graphic characters. Print up
to the next non-graphic character. */
-
- if (print_filenames)
- printf ("%s: ", filename);
- if (print_addresses)
- switch (address_radix)
- {
- case 8:
-#ifdef HAVE_LONG_LONG
- if (sizeof (start) > sizeof (long))
- {
-# ifndef __MSVCRT__
- printf ("%7llo ", (unsigned long long) start);
-# else
- printf ("%7I64o ", (unsigned long long) start);
-# endif
- }
- else
-#elif !BFD_HOST_64BIT_LONG
- if (start != (unsigned long) start)
- printf ("++%7lo ", (unsigned long) start);
- else
-#endif
- printf ("%7lo ", (unsigned long) start);
- break;
-
- case 10:
-#ifdef HAVE_LONG_LONG
- if (sizeof (start) > sizeof (long))
- {
-# ifndef __MSVCRT__
- printf ("%7llu ", (unsigned long long) start);
-# else
- printf ("%7I64d ", (unsigned long long) start);
-# endif
- }
- else
-#elif !BFD_HOST_64BIT_LONG
- if (start != (unsigned long) start)
- printf ("++%7lu ", (unsigned long) start);
- else
-#endif
- printf ("%7ld ", (long) start);
- break;
-
- case 16:
-#ifdef HAVE_LONG_LONG
- if (sizeof (start) > sizeof (long))
- {
-# ifndef __MSVCRT__
- printf ("%7llx ", (unsigned long long) start);
-# else
- printf ("%7I64x ", (unsigned long long) start);
-# endif
- }
- else
-#elif !BFD_HOST_64BIT_LONG
- if (start != (unsigned long) start)
- printf ("%lx%8.8lx ", (unsigned long) (start >> 32),
- (unsigned long) (start & 0xffffffff));
- else
-#endif
- printf ("%7lx ", (unsigned long) start);
- break;
- }
+ print_filename_and_address (filename, start);
buf[i] = '\0';
fputs (buf, stdout);
@@ -718,6 +1330,8 @@ usage (FILE *stream, int status)
-T --target=<BFDNAME> Specify the binary file format\n\
-e --encoding={s,S,b,l,B,L} Select character size and endianness:\n\
s = 7-bit, S = 8-bit, {b,l} = 16-bit, {B,L} = 32-bit\n\
+ --unicode={default|show|invalid|hex|escape|highlight}\n\
+ -u {d|s|i|x|e|h} Specify how to treat UTF-8 encoded unicode characters\n\
-s --output-separator=<string> String used to separate strings in output.\n\
@<file> Read options from <file>\n\
-h --help Display this information\n\
--
1.8.3.1
Reference in New Issue Copy Permalink