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* cli/cli-cmds.c (disassemble_command): Add support of disassemble

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"start,+length" form of arguments.
This commit is contained in:
Cheng Renquan 2010-07-27 20:33:40 +00:00
parent c63a1f8688
commit 53a71c0681
5 changed files with 61 additions and 11 deletions
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8
gdb/ChangeLog
View file

@ -1,3 +1,11 @@
2010-07-28 CHENG Renquan <rqcheng@smu.edu.sg>
* cli/cli-cmds.c (disassemble_command): Add support of disassemble
"start,+length" form of arguments.
* NEWS: Add "Changed commands" (disassemble) section for "Changes
since GDB 7.1"; and merge two separated paragraphs of disassemble
description in "Changes in GDB 7.0".
2010-07-27 Jan Kratochvil <jan.kratochvil@redhat.com>
* top.c (input_from_terminal_p): Return 0 on BATCH_FLAG.

13
gdb/NEWS
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@ -192,6 +192,11 @@ strace FN | FILE:LINE | *ADDR | -m MARKER_ID
Define a static tracepoint by probing a marker at the given
function, line, address, or marker ID.
* Changed commands
disassemble
The disassemble command now supports "start,+length" form of two arguments.
* Python scripting
** GDB now provides a new directory location, called the python directory,
@ -541,8 +546,9 @@ or the "condition" command is available. GDB sends the condition to
the target for evaluation using the same bytecode format as is used
for tracepoint actions.
* "disassemble" command with a /r modifier, print the raw instructions
in hex as well as in symbolic form.
* The disassemble command now supports: an optional /r modifier, print the
raw instructions in hex as well as in symbolic form, and an optional /m
modifier to print mixed source+assembly.
* Process record and replay
@ -634,9 +640,6 @@ qXfer:siginfo:write
packet that permited the stub to pass a process id was removed.
Remote servers should use the `T' stop reply packet instead.
* The "disassemble" command now supports an optional /m modifier to print mixed
source+assembly.
* GDB now supports multiple function calling conventions according to the
DWARF-2 DW_AT_calling_convention function attribute.

18
gdb/cli/cli-cmds.c
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@ -1108,8 +1108,9 @@ disassemble_current_function (int flags)
- dump the assembly code for the function of the current pc
disassemble [/mr] addr
- dump the assembly code for the function at ADDR
disassemble [/mr] low high
- dump the assembly code in the range [LOW,HIGH)
disassemble [/mr] low,high
disassemble [/mr] low,+length
- dump the assembly code in the range [LOW,HIGH), or [LOW,LOW+length)
A /m modifier will include source code with the assembly.
A /r modifier will include raw instructions in hex with the assembly. */
@ -1180,8 +1181,18 @@ disassemble_command (char *arg, int from_tty)
else
{
/* Two arguments. */
int incl_flag = 0;
low = pc;
while (isspace (*arg))
arg++;
if (arg[0] == '+')
{
++arg;
incl_flag = 1;
}
high = parse_and_eval_address (arg);
if (incl_flag)
high += low;
}
print_disassembly (gdbarch, name, low, high, flags);
@ -1615,7 +1626,8 @@ Default is the function surrounding the pc of the selected frame.\n\
With a /m modifier, source lines are included (if available).\n\
With a /r modifier, raw instructions in hex are included.\n\
With a single argument, the function surrounding that address is dumped.\n\
Two arguments (separated by a comma) are taken as a range of memory to dump."));
Two arguments (separated by a comma) are taken as a range of memory to dump,\n\
in the form of \"start,end\", or \"start,+length\"."));
set_cmd_completer (c, location_completer);
if (xdb_commands)
add_com_alias ("va", "disassemble", class_xdb, 0);

5
gdb/doc/ChangeLog
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@ -1,3 +1,8 @@
2010-07-28 CHENG Renquan <rqcheng@smu.edu.sg>
* gdb.texinfo (Machine Code): Update description of two forms of
arguments, and add new example to demonstrate the new form.
2010-07-27 Phil Muldoon <pmuldoon@redhat.com>
* gdb.texinfo (Values From Inferior): Add value inferior function

28
gdb/doc/gdb.texinfo
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@ -6742,9 +6742,19 @@ program counter of the selected frame. A single argument to this
command is a program counter value; @value{GDBN} dumps the function
surrounding this value. When two arguments are given, they should
be separated by a comma, possibly surrounded by whitespace. The
arguments specify a range of addresses (first inclusive, second exclusive)
to dump. In that case, the name of the function is also printed (since
there could be several functions in the given range).
arguments specify a range of addresses to dump, in one of two forms:
@table @code
@item @var{start},@var{end}
the addresses from @var{start} (inclusive) to @var{end} (exclusive)
@item @var{start},+@var{length}
the addresses from @var{start} (inclusive) to
@code{@var{start}+@var{length}} (exclusive).
@end table
@noindent
When 2 arguments are specified, the name of the function is also
printed (since there could be several functions in the given range).
The argument(s) can be any expression yielding a numeric value, such as
@samp{0x32c4}, @samp{&main+10} or @samp{$pc - 8}.
@ -6796,6 +6806,18 @@ Dump of assembler code for function main:
End of assembler dump.
@end smallexample
Here is another example showing raw instructions in hex for AMD x86-64,
@smallexample
(gdb) disas /r 0x400281,+10
Dump of assembler code from 0x400281 to 0x40028b:
0x0000000000400281: 38 36 cmp %dh,(%rsi)
0x0000000000400283: 2d 36 34 2e 73 sub $0x732e3436,%eax
0x0000000000400288: 6f outsl %ds:(%rsi),(%dx)
0x0000000000400289: 2e 32 00 xor %cs:(%rax),%al
End of assembler dump.
@end smallexample
Some architectures have more than one commonly-used set of instruction
mnemonics or other syntax.