user/sven/linux.git/arch/s390/tools/gen_opcode_table.c, branch v5.7

s390/tools: fix gcc 8 stringop-truncation warnings

2018-07-02T09:25:05Z

Replace strncpy which has been used to copy a substring into buf without NUL-termination with memcpy to avoid the following gcc 8 warnings: arch/s390/tools/gen_opcode_table.c: In function ‘add_to_group.isra.4’: arch/s390/tools/gen_opcode_table.c:260:2: warning: ‘strncpy’ output may be truncated copying 2 bytes from a string of length 19 [-Wstringop-truncation] strncpy(group->opcode, insn->opcode, 2); In function ‘print_opcode_table’, inlined from ‘main’ at arch/s390/tools/gen_opcode_table.c:333:2: arch/s390/tools/gen_opcode_table.c:286:4: warning: ‘strncpy’ output may be truncated copying 2 bytes from a string of length 19 [-Wstringop-truncation] strncpy(opcode, insn->opcode, 2); Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390/tools: generate header files in arch/s390/include/generated/

2018-01-23T06:36:53Z

Previously, the generated dis.h and facilities.h header files have been stored in include/generated. Because they are s390 specific, store them in the arch/s390/include/generated/asm/ directory. Also update references to the header files respectively. To prevent name collisions with those header files in asm/ that include the generated ones, rename the generated headers files and add an -defs suffix. Also update the generators to create the ifdef guards respectively. Signed-off-by: Hendrik Brueckner Acked-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390: add a few more SPDX identifiers

2017-12-05T06:51:09Z

Add the correct SPDX license to a few more files under arch/s390 and drivers/s390 which have been missed to far. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. Signed-off-by: Martin Schwidefsky

s390/disassembler: generate opcode tables from text file

2017-11-08T21:11:02Z

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