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/* Chrysalide - Outil d'analyse de fichiers binaires
* ##FILE## - traduction d'instructions ARMv7
*
* Copyright (C) 2014 Cyrille Bagard
*
* This file is part of Chrysalide.
*
* Chrysalide is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Chrysalide is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
@title B
@encoding(t1) {
@half 1 1 0 1 cond(4) imm8(8)
@syntax {c} <label>
@conv {
c = Condition(cond)
label = SignExtend(imm8:'0', imm8 & 0x80, 32)
}
@hooks {
fetch = help_fetching_with_instruction_b_from_thumb
link = handle_arm_conditional_branch_as_link
post = post_process_branch_instructions
}
@rules {
//if cond == '1110' then UNDEFINED;
//if cond == '1111' then SEE SVC;
//chk_call DefineAsReturn(1)
}
}
@encoding(t2) {
@half 1 1 1 0 0 imm11(11)
@syntax <label>
@conv {
label = SignExtend(imm11:'0', imm11 & 0x400, 32)
}
@hooks {
fetch = help_fetching_with_instruction_b_from_thumb
link = handle_arm_conditional_branch_as_link
post = post_process_branch_instructions
}
@rules {
//if InITBlock() && !LastInITBlock() then UNPREDICTABLE;
//chk_call DefineAsReturn(1)
}
}
@encoding(T3) {
@word 1 1 1 1 0 S(1) cond(4) imm6(6) 1 0 J1(1) 0 J2(1) imm11(11)
@syntax {c} ".W" <label>
@conv {
c = Condition(cond)
label = SignExtend(S:J2:J1:imm6:imm11:'0', S, 32)
}
@hooks {
fetch = help_fetching_with_instruction_b_from_thumb
link = handle_arm_conditional_branch_as_link
post = post_process_branch_instructions
}
@rules {
//if cond<3:1> == '111' then SEE "Related encodings";
//if InITBlock() then UNPREDICTABLE;
//chk_call DefineAsReturn(1)
}
}
@encoding(T4) {
@word 1 1 1 1 0 S(1) imm10(10) 1 0 J1(1) 1 J2(1) imm11(11)
@syntax "b.W" <label>
@conv {
I1 = NOT(J1 EOR S)
I2 = NOT(J2 EOR S)
label = SignExtend(S:I1:I2:imm10:imm11:'0', S, 32)
}
@hooks {
fetch = help_fetching_with_instruction_b_from_thumb
link = handle_arm_conditional_branch_as_link
post = post_process_branch_instructions
}
@rules {
//if InITBlock() && !LastInITBlock() then UNPREDICTABLE;
//chk_call DefineAsReturn(1)
}
}
@encoding(A1) {
@word cond(4) 1 0 1 0 imm24(24)
@syntax {c} <label>
@conv {
c = Condition(cond)
label = SignExtend(imm24:'00', imm24 & 0x800000, 32)
}
@hooks {
fetch = help_fetching_with_instruction_b_from_arm
link = handle_arm_conditional_branch_as_link
post = post_process_branch_instructions
}
@rules {
//chk_call DefineAsReturn(1)
}
}
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