path: root/arch/s390/Makefile
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authorHeiko Carstens <heiko.carstens@de.ibm.com>2017-11-06 13:29:56 +0100
committerHeiko Carstens <heiko.carstens@de.ibm.com>2017-11-08 22:11:02 +0100
commit8bc1e4ec79c0fcd48ff8914566fe960c34f27bc2 (patch)
treec721bcd8ee142c47644c732353a3a98fab4a7989 /arch/s390/Makefile
parents390/disassembler: remove insn_to_mnemonic() (diff)
s390/disassembler: generate opcode tables from text file
The current way of adding new instructions to the opcode tables is painful and error prone. Therefore add, similar to binutils, a text file which contains all opcodes and the corresponding mnemonics and instruction formats. A small gen_opcode_table tool then generates a header file with the required enums and opcode table initializers at the prepare step of the kernel build. This way only a simple text file has to be maintained, which can be rather easily extended. Unlike before where there were plenty of opcode tables and a large switch statement to find the correct opcode table, there is now only one opcode table left which contains all instructions. A second opcode offset table now contains offsets within the opcode table to find instructions which have the same opcode prefix. In order to save space all 1-byte opcode instructions are grouped together at the end of the opcode table. This is also quite similar to like it was before. In addition also move and change code and definitions within the disassembler. As a side effect this reduces the size required for the code and opcode tables by ~1.5k. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'arch/s390/Makefile')
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 64c2fe9dcfbe..6b3f41985f28 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -133,6 +133,7 @@ archclean:
$(Q)$(MAKE) $(build)=$(tools) include/generated/facilities.h
+ $(Q)$(MAKE) $(build)=$(tools) include/generated/dis.h
# Don't use tabs in echo arguments
define archhelp