53cf2ee0d9
gdb/doc/agentexpr.texi documents the "setv" opcode as follow:
@item @code{setv} (0x2d) @var{n}: @result{} @var{v}
Set trace state variable number @var{n} to the value found on the top
of the stack. The stack is unchanged, so that the value is readily
available if the assignment is part of a larger expression. The
handling of @var{n} is as described for @code{getv}.
The @item line is incorrect (and does not match with its
description), so this patch fixes it.
Additionally, in gdb/common/ax.def we find the line:
DEFOP (setv, 2, 0, 0, 1, 0x2d)
From the comment earlier in the file:
Each line is of the form:
DEFOP (name, size, data_size, consumed, produced, opcode)
[...]
CONSUMED is the number of stack elements consumed.
PRODUCED is the number of stack elements produced.
which is saying that nothing is consumed and one item is produced.
Both should be 0 or both should be 1.
This patch sets them both to 1, which seems better since if nothing
is on the stack an error will occur.
gdb/ChangeLog:
* common/ax.def (setv): Fix consumed entry in setv DEFOP.
gdb/doc/ChangeLog:
* agentexpr.texi (Bytecode Descriptions): Fix summary line for setv.
Tested on x86_64-linux.
97 lines
3.7 KiB
C
97 lines
3.7 KiB
C
/* Definition of agent opcode values. -*- c -*-
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Copyright (C) 1998-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* The actual values of the various bytecode operations.
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Other independent implementations of the agent bytecode engine will
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rely on the exact values of these enums, and may not be recompiled
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when we change this table. The numeric values should remain fixed
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whenever possible. Thus, we assign them values explicitly here (to
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allow gaps to form safely), and the disassembly table in
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agentexpr.h behaves like an opcode map. If you want to see them
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grouped logically, see doc/agentexpr.texi.
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Each line is of the form:
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DEFOP (name, size, data_size, consumed, produced, opcode)
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NAME is the name of the operation.
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SIZE is the number of argument bytes that the operation takes from
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the bytecode stream.
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DATA_SIZE is the size of data operated on, in bits, for operations
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that care (ref and const). It is zero otherwise.
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CONSUMED is the number of stack elements consumed.
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PRODUCED is the number of stack elements produced.
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OPCODE is the operation's encoding. */
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DEFOP (float, 0, 0, 0, 0, 0x01)
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DEFOP (add, 0, 0, 2, 1, 0x02)
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DEFOP (sub, 0, 0, 2, 1, 0x03)
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DEFOP (mul, 0, 0, 2, 1, 0x04)
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DEFOP (div_signed, 0, 0, 2, 1, 0x05)
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DEFOP (div_unsigned, 0, 0, 2, 1, 0x06)
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DEFOP (rem_signed, 0, 0, 2, 1, 0x07)
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DEFOP (rem_unsigned, 0, 0, 2, 1, 0x08)
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DEFOP (lsh, 0, 0, 2, 1, 0x09)
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DEFOP (rsh_signed, 0, 0, 2, 1, 0x0a)
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DEFOP (rsh_unsigned, 0, 0, 2, 1, 0x0b)
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DEFOP (trace, 0, 0, 2, 0, 0x0c)
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DEFOP (trace_quick, 1, 0, 1, 1, 0x0d)
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DEFOP (log_not, 0, 0, 1, 1, 0x0e)
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DEFOP (bit_and, 0, 0, 2, 1, 0x0f)
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DEFOP (bit_or, 0, 0, 2, 1, 0x10)
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DEFOP (bit_xor, 0, 0, 2, 1, 0x11)
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DEFOP (bit_not, 0, 0, 1, 1, 0x12)
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DEFOP (equal, 0, 0, 2, 1, 0x13)
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DEFOP (less_signed, 0, 0, 2, 1, 0x14)
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DEFOP (less_unsigned, 0, 0, 2, 1, 0x15)
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DEFOP (ext, 1, 0, 1, 1, 0x16)
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DEFOP (ref8, 0, 8, 1, 1, 0x17)
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DEFOP (ref16, 0, 16, 1, 1, 0x18)
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DEFOP (ref32, 0, 32, 1, 1, 0x19)
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DEFOP (ref64, 0, 64, 1, 1, 0x1a)
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DEFOP (ref_float, 0, 0, 1, 1, 0x1b)
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DEFOP (ref_double, 0, 0, 1, 1, 0x1c)
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DEFOP (ref_long_double, 0, 0, 1, 1, 0x1d)
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DEFOP (l_to_d, 0, 0, 1, 1, 0x1e)
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DEFOP (d_to_l, 0, 0, 1, 1, 0x1f)
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DEFOP (if_goto, 2, 0, 1, 0, 0x20)
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DEFOP (goto, 2, 0, 0, 0, 0x21)
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DEFOP (const8, 1, 8, 0, 1, 0x22)
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DEFOP (const16, 2, 16, 0, 1, 0x23)
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DEFOP (const32, 4, 32, 0, 1, 0x24)
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DEFOP (const64, 8, 64, 0, 1, 0x25)
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DEFOP (reg, 2, 0, 0, 1, 0x26)
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DEFOP (end, 0, 0, 0, 0, 0x27)
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DEFOP (dup, 0, 0, 1, 2, 0x28)
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DEFOP (pop, 0, 0, 1, 0, 0x29)
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DEFOP (zero_ext, 1, 0, 1, 1, 0x2a)
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DEFOP (swap, 0, 0, 2, 2, 0x2b)
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DEFOP (getv, 2, 0, 0, 1, 0x2c)
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DEFOP (setv, 2, 0, 1, 1, 0x2d)
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DEFOP (tracev, 2, 0, 0, 1, 0x2e)
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DEFOP (tracenz, 0, 0, 2, 0, 0x2f)
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DEFOP (trace16, 2, 0, 1, 1, 0x30)
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/* We need something here just to make the tables come out ok. */
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DEFOP (invalid2, 0, 0, 0, 0, 0x31)
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/* The "consumed" number for pick is wrong, but there's no way to
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express the right thing. */
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DEFOP (pick, 1, 0, 0, 1, 0x32)
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DEFOP (rot, 0, 0, 3, 3, 0x33)
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/* Both the argument and consumed numbers are dynamic for this one. */
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DEFOP (printf, 0, 0, 0, 0, 0x34)
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