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185 Commits

Author SHA1 Message Date
Caroline Tice 485b4d8352 Add new instruction context, eContextWriteRegisterRandomBits. 
Add new utility function, WriteBits32Unknown

Modify the LDM* instruction emulation functions to call WriteBits32Unknown.
Add missing overview comments to the LDM* instruction emulation functions.

Add code to emulate LDMDA Arm instruction.

llvm-svn: 125377
 2011-02-11 17:59:55 +00:00
Johnny Chen c7af6fe3bd Add an entry for CMP (immediate) (Encoding T1) to the g_thumb_opcodes table. 
llvm-svn: 125333
 2011-02-11 02:02:56 +00:00
Johnny Chen 37c48b02a4 Add a helper method AddWithCarry() to the EmulateInstructionARM class. 
llvm-svn: 125329
 2011-02-11 01:29:53 +00:00
Johnny Chen c843a78efc Namings are important. Renamed Bits32(const uint32_t val, uint32_t bit) to Bit32(val, bit) and 
SetBits32(uint32_t &bits, uint32_t bit, uint32_t val) to SetBit32(bits, bit, val).

llvm-svn: 125312
 2011-02-10 21:39:01 +00:00
Johnny Chen 101f6efb8a Some refactorings to use the convenience function: Bits32(const uint32_t value, const uint32_t bit). 
llvm-svn: 125303
 2011-02-10 19:54:05 +00:00
Johnny Chen 992b48c4be Add some comment markers. 
llvm-svn: 125302
 2011-02-10 19:40:42 +00:00
Johnny Chen 0cfda5bbb5 Add a generic EmulateMovRdRm() method and modify/add entries to the g_thumb_opcodes 
table.  Also add some more defines and convenience functions.

llvm-svn: 125300
 2011-02-10 19:29:03 +00:00
Johnny Chen 77224a5422 Rearrange the order of g_thumb_opcodes entries. 
llvm-svn: 125295
 2011-02-10 18:13:23 +00:00
Johnny Chen cc13e4c62e Add EmulateLDRRtRnImm() for EncodingT1 of LDR (immediate, Thumb) to the g_thumb_opcodes table, 
and a helper method UnalignedSupport().

llvm-svn: 125258
 2011-02-10 01:52:38 +00:00
Johnny Chen 1cabebe7bc Add a new member variable m_new_inst_cpsr to catch the to-be-updated state 
of the CPSR during the course of executing an opcode, and modified SelectInstrSet()
to update this variable instead of the original m_inst_cpsr, which should be
the cached copy of the CPSR at the beginning of executing the opcode.

llvm-svn: 125244
 2011-02-09 23:59:17 +00:00
Johnny Chen edf55ae52a Add EmulateAddRdnRm() for EncodingT2 of ADD(register) to the g_thumb_opcodes table, 
and a helper method ALUWritePC(Context&, uint32_t).

llvm-svn: 125241
 2011-02-09 23:43:29 +00:00
Johnny Chen 0ce4a83c44 Modified existing Emulate* methods to call LoadWritePC(context, data) where appropriate to 
effect an interworking branch if the ArchVersion() is ARMv5T and above.

llvm-svn: 125227
 2011-02-09 22:02:17 +00:00
Johnny Chen 8bba644bf4 Modified EmulatePop impl to use the helper method LoadWritePC(context, data) since if PC 
is in the list of registers to be load and we're in ARMv5T and above, this is an interworking branch.

llvm-svn: 125212
 2011-02-09 19:30:49 +00:00
Johnny Chen cc707657f9 If the CPSR is changed due to switching between ARM and Thumb ISETSTATE, 
we want to record it and issue a WriteRegister callback so the clients
can track the mode changes accordingly.

llvm-svn: 125209
 2011-02-09 19:11:32 +00:00
Greg Clayton 000aeb89ae Patch from Kirk Beitz to make things compile on MinGW minus the putenv part. 
llvm-svn: 125199
 2011-02-09 17:41:27 +00:00
Johnny Chen 7eaacc517b Add some helper methods to the EmulateInstructionARM class as a first step in the 
refactorings of EmulateInstructionARM.cpp file, which will be modified later to
take advantage of these helper methods.

llvm-svn: 125148
 2011-02-09 01:00:31 +00:00
Caroline Tice 123b89b67f Add code to emulate the LDMIB Arm instruction. 
Modify code for LDM and LDMDB instructions to only
create one context and to reuse it, rather than 
creating multiple contexts.

llvm-svn: 125139
 2011-02-08 23:56:10 +00:00
Johnny Chen 108a363318 Fix typos. 
llvm-svn: 125138
 2011-02-08 23:49:37 +00:00
Johnny Chen 03feace9d0 Add EmulateCB() entry to the g_thumb_opcodes table to represent "Compare and Branch 
on NonZero and Compare and Branch on Zero" operations.

llvm-svn: 125134
 2011-02-08 23:21:57 +00:00
Caroline Tice cdb58e1236 Add code to emulate LDMDB Arm instruction. 
llvm-svn: 125133
 2011-02-08 23:16:02 +00:00
Caroline Tice 7aa01cfd64 Add code to emulate the LDM ARM instruction. 
llvm-svn: 125118
 2011-02-08 22:24:38 +00:00
Johnny Chen 181376f29f Add missing implementation for "BL, BLX (immediate)" Encoding T1 and an entry for "bl <label>" 
into g_thumb_opcodes table.

llvm-svn: 125112
 2011-02-08 20:36:34 +00:00
Johnny Chen 86e48b6940 Add missing implementation for "BL, BLX (immediate)" Encoding A1. 
llvm-svn: 125103
 2011-02-08 18:58:31 +00:00
Johnny Chen a3990398a3 Add implementation for EmulateInstructionARM::EmulateB() and fixed two typos in g_thumb_opcodes 
as pointed out By Caroline.  Refactored a little bit by adding two new helper methods to the
EmulateInstructionARM class:

o BranchWritePC()
o BXWritePC()

llvm-svn: 125059
 2011-02-08 00:06:35 +00:00
Johnny Chen 05a975d777 Add EmulateInstructionARM::EmulateB entries to the g_arm_opcodes and g_thumb_opcodes 
tables.  EmulateB() has empty impl. and needs to be filled in later.

llvm-svn: 125048
 2011-02-07 20:11:47 +00:00
Greg Clayton 95e314260e Header patch, virtual dtor patch and missed UUID patch from Kirk Beitz. 
llvm-svn: 124931
 2011-02-05 02:56:16 +00:00
Johnny Chen 56902044a7 Handle the thumb branch instructions which have their cond bits embedded in the instruction stream. 
llvm-svn: 124925
 2011-02-05 01:39:52 +00:00
Johnny Chen 6e2acff0be Add EmulateInstructionARM::EmulateIT() to the g_thumb_opcodes table, 
to represent the the 'If Then' instruction which makes up to four following
instructions (the IT block)conditional.

Hook up ITSession utility class as a member variable of EmulateInstructionARM.

llvm-svn: 124915
 2011-02-05 00:46:10 +00:00
Johnny Chen ea745e86c8 Add a utility class ITSession to maintain the ITState for the Thumb ISA. 
llvm-svn: 124906
 2011-02-04 23:02:47 +00:00
Johnny Chen b52193787d Add EmulateInstructionARM::EmulateSVC() to the g_arm_opcodes and g_thumb_opcodes tables, 
to represent the supervisor call instruction (previosuly software interrupt).

llvm-svn: 124840
 2011-02-04 00:40:18 +00:00
Johnny Chen d07a57f222 Add EmulateBLXImmediate() and EmulateBLXRm() to the g_arm_opcodes and g_thumb_opcodes tables, 
which represent "bl <label>", "blx <label>", and "blx <Rm>" instructions.

llvm-svn: 124710
 2011-02-02 01:13:56 +00:00
Johnny Chen 2684ccccda Remove the 'lldb_private::' namespace resolution operator. 
llvm-svn: 124671
 2011-02-01 18:51:48 +00:00
Johnny Chen 3d9011d6dd Add EmulateVPOP() to the g_arm_opcodes and g_thumb_opcodes tables, which represents 
an operation to load multiple extension registers from the stack.

llvm-svn: 124670
 2011-02-01 18:35:28 +00:00
Greg Clayton c46f94d490 Cleaned up the EmulateInstructionARM to have the evaluate instruction 
callbacks use member functions.

llvm-svn: 124636
 2011-02-01 00:49:32 +00:00
Greg Clayton c1dfd93e1e Made the EmulateInstruction class into a plug-in interface and moved the 
source files around into the places they need to go.

llvm-svn: 124631
 2011-02-01 00:04:43 +00:00