tree f8c2156ede2909d625d919d873c3b07586a998c9
parent a71eb312db95b2234b26bd359a8d63efb932725d
author Pavel Labath <labath@google.com> 1521546984 +0000
committer Pavel Labath <labath@google.com> 1521546984 +0000

Re-land: [lldb] Use vFlash commands when writing to target's flash memory regions

The difference between this and the previous patch is that now we use
ELF physical addresses only for loading objects into the target (and the
rest of the module load address logic still uses virtual addresses).

Summary:
When writing an object file over gdb-remote, use the vFlashErase, vFlashWrite, and vFlashDone commands if the write address is in a flash memory region.  A bare metal target may have this kind of setup.

- Update ObjectFileELF to set load addresses using physical addresses.  A typical case may be a data section with a physical address in ROM and a virtual address in RAM, which should be loaded to the ROM address.
- Add support for querying the target's qXfer:memory-map, which contains information about flash memory regions, leveraging MemoryRegionInfo data structures with minor modifications
- Update ProcessGDBRemote to use vFlash commands in DoWriteMemory when the target address is in a flash region

Original discussion at http://lists.llvm.org/pipermail/lldb-dev/2018-January/013093.html

Reviewers: clayborg, labath

Reviewed By: labath

Subscribers: llvm-commits, arichardson, emaste, mgorny, lldb-commits

Differential Revision: https://reviews.llvm.org/D42145
Patch by Owen Shaw <llvm@owenpshaw.net>.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@327970 91177308-0d34-0410-b5e6-96231b3b80d8