No major cross dependencies, mostly changes internal to each
file/function.
Change-Id: I1325560ef0350517d86d4927cb17ceaae81b75d2
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/6340
Tested-by: jenkins
Reviewed-by: Oleksij Rempel <linux@rempel-privat.de>
Reviewed-by: Xiang W <wxjstz@126.com>
As stated in ARM v8-A Architecture Reference Manual (ARM DDI 0487E.a)
in Chapter H4.3 DCC and ITR access modes:
Writes to EDITR trigger the instruction to be executed if the PE
is in Debug state:
- If the PE is in AArch64 state, this is an A64 instruction.
- If the PE is in AArch32 state, this is a T32 instruction
But in armv8_opcodes specifically in t32_opcodes we were using some
A32 instructions for HLT, LDRx and STRx opcodes.
Using the correct LDRx and STRx opcodes, fixes 16 and 8 bits memory access
when the PE is in AArch32 state.
Change-Id: Ib1acbdd4966297e7b069569bcb8deea3c3993615
Signed-off-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Reviewed-on: http://openocd.zylin.com/5346
Tested-by: jenkins
Reviewed-by: Muhammad Omair Javaid <omair.javaid@linaro.org>
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Before this patch aarch64_set_breakpoint was using either A64, or A32
HLT opcode by relying on armv8_opcode helper.
This behaviors ignores the fact that in AArch32 state the core could
execute Thumb-2 instructions, and gdb could request to insert a soft
bkpt in a Thumb-2 code chunk.
In this change, we check the core_state and bkpt length to know the
correct opcode to use.
Note: based on https://sourceware.org/gdb/current/onlinedocs/gdb/ARM-Breakpoint-Kinds.html
if bkpt length/kind == 3, we should replace a 32-bit Thumb-2 opcode,
then we use twice the 16 bits Thumb-2 bkpt opcode and we fix-up the
length to 4 bytes, in order to set correctly the bpkt.
Change-Id: I8f3551124412c61d155eae87761767e9937f917d
Signed-off-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Reviewed-on: http://openocd.zylin.com/5355
Tested-by: jenkins
Reviewed-by: Muhammad Omair Javaid <omair.javaid@linaro.org>
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
This patch adds support in openOCD to read/write AArch64 SIMD/FP registers.
This patch depends on a previous patch which adds support to generation
of target xml by openOCD with nested architecture defined types. AArch64
SIMD/FP registers assumes various types and to support all types we
implement them as architecture defined type aarch64v which in turn
consists of various architecture defined types. This is compatible with
AArch64-FPU target xml in GDB. Please refer to
binutils-gdb/gdb/features/aarch64-fpu.xml
Change-Id: I7ffb0c21b3c2e08f13720b765408b30aab2a9808
Signed-off-by: Omair Javaid <omair.javaid@linaro.org>
Reviewed-on: http://openocd.zylin.com/4373
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
The existing code only used Memory Access mode to read memory,
which uses 32 bit operations only.
Rework the code to check the alignment/size of the read/write operation,
and use the Memory Access mode to read aligned 32 bit memory.
When using unaligned access, or 8 or 16 bit reads, use LDR{BHW} and STR{BHW}
instead.
The exception handling is still the same as it was before (meaning it breaks
when things go wrong), but I can now read an 8 bit register correctly.
Change-Id: I739a5ee825c0226ed4a89c32895cc2a047b8dc15
Signed-off-by: Bas Vermeulen <bas@daedalean.ai>
Reviewed-on: http://openocd.zylin.com/4301
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
Reduce SLOCs in SCTLR retrieval and modification functions and make them
less complex.
Change-Id: Ida1a99c223743247f171b52eef80dc9886802101
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/3982
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
Use the correct opcode for Aarch32 state, both for the breakpoint
instruction itself and the cache handling functions.
Change-Id: I975fa67b1e577b54f5c672a01d516419c6a614b2
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/3981
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
"currentel" special register is not accessible in debug state.
Change-Id: I9022b01b423cd9ae8227ed018d6166078ba44832
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
recommended for Corte-A8 cores, not sure if necessary
for ARMv8 based cores as well.
Change-Id: Ibcb36170c5fac6a6b132de17f734c70a56919f9b
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Use proper T32 opcodes for cache identification when the PE is in
Aarch32 state
Change-Id: I9cd9169409889273a3fd61167f388e68d8dde86d
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
DCPS only allows to enter higher ELs, for lower ELs you need to
use DRPS. Also, of course the encoding differs between A64 and T32.
Both DCPS and DRPS also clobber DLR and DSPSR, which then need to be
restored on resume.
Change-Id: Ifa3dcfa94212702e57170bd59fd0bb25495fb6fd
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
All register access is now performed through common read/write
functions, which delegate the actual register access to the
armv8_common object. armv8_common contains function pointers
to direct read and write requests to the respective low-level
functions for each PE state.
The respective read/write functions are selected on debug state
entry.
At the same time, T32 opcodes are now formatted for ITR in
dpmv8_exec_opcode() and the T32_FMTITR macro is removed from global
visibility.
Change-Id: I9eaef017c7cc9e0c531e693c534901bfdbdb842c
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Use AT commands to translate virtual to physical addresses based on
current MMU configuration.
Change-Id: I1bbd7d674c435541b617b17022fa9f7f0f01bdab
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Update cache identification to match functionality present in
armv7a_cache.c
Change-Id: I2dc4bee80f5a22b8728334d40331c183d1406f27
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Add database for common, equivalent opcodes for Aarch32 and
Aarch64 execution states
Revisit all functions that access Aarch64 specific registers
or use Aarch64 opcodes and rewrite them to act depending on
current state of the core.
Add core register access functions for Aarch32 state
Add function to determine the core execution state without
reading DSPSR.
Change-Id: I345e9f6d682fb4ba454e4b1d16bb5e1b27570691
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
For now only D-Cache flush (Clean&Invalidate) and I-Cache
invalidate are implemented. That's enough for software breakpoints.
Change-Id: I8e96d645a230b51e3490403f4564e59ba6a76cf3
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
External debuggers need to use HLT, not BRK. HLT generates a halting
debug event while BRK generates a debug exception for self-hosted
debugging.
Change-Id: I24024b83668107f73a14cc75d951134917269e5c
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
