version=20220321
v3.20 add ls3a2000 support.
v3.21 update put, get, callbin for ls3a and  ls3a2000 to avoid guess.
v3.21.2 update ls3a config, fix cpu window, disable ddr window. program_cachelock work well.
v3.21.3 update ls3a2000, ls3a config, memset to init cachelocked area first.
v3.22.1 add ls3c(ls3b1500) support.
v3.22.2 update ls3a,ls3c program_cachelock
v3.22.3 update ls1b program_cachelock, ls3a i2c function etc.
v3.22.4 add more user debug cmd.
v3.22.5 change some script.
v3.23 fix expr cmd,add dummy, devmem,update scripts.
v3.23.1 fix abi maped address check, update gdb1.py.
v3.23.2 new mipsel-gdb, support python. 
v3.24 fix gdb for mcpu, add more usefull tools.
v3.24.1 fix gdb, gdbmap can trans address.
v3.24.2 fix unwatch, add spi1.BIN, fix ls1h erase area.
v3.24.3 mips add ejtag_debug_gpio
v3.24.4 update scripts, add ls2k support etc.
v3.24.5 update eclipse, ddd scripts.
v3.24.6 add log cmd, update eclipse, update scripts.
v3.24.7 update eclipse, update scripts, fix smemset.
v3.25  change gdb mode for multi cpu.
v3.25.1 fix eclipse support for windows, fix smemcpy
v3.25.2 add 1dflash.iobase, soft breakpoint use gdbmap.
v3.25.3 fix go cmd and gdb cmd cont.
v3.25.4 add log, eclipse update to latest version.
v3.25.5 fix break,ret cmd not inited.
v3.25.6 fix gdbmap, symbol cmd
v3.25.8 add Hb,unHb etc,update ls1d, ls1c nand tool.
v3.25.9 hb add asid:asid gid:gid support.
v3.25.10 fix expr bug, update scripts
v3.25.11 fix sputelf, update scripts
v3.25.12 fix callbin, fix read data reg.
v3.25.13 use jtag all reg, fix restore for 3a4000.
v3.25.14 fix hb for asid change argv.
v3.25.17 add rtc_wake scripts etc.
v3.25.18 add 16bit support.
v3.25.19 add callelf support.
v20220321: add cmd configcoreswidths, ls2k500 add enable_la32.


gdb build:
linux:
../configure --disable-werror --target=mipsel-linux --enable-targets=mipsel-linux,mips64el-linux --enable-tui --enable-static --disable-doc
cygwin/msys2:
../configure --disable-werror --target=mipsel-linux --enable-targets=mipsel-linux,mips64el-linux --enable-tui --enable-static --disable-doc --build=x86_64-cygwin
