diff options
Diffstat (limited to 'arch/s390/include/asm/asm-extable.h')
| -rw-r--r-- | arch/s390/include/asm/asm-extable.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/arch/s390/include/asm/asm-extable.h b/arch/s390/include/asm/asm-extable.h new file mode 100644 index 000000000..b74f1070d --- /dev/null +++ b/arch/s390/include/asm/asm-extable.h @@ -0,0 +1,88 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_EXTABLE_H +#define __ASM_EXTABLE_H + +#include <linux/stringify.h> +#include <linux/bits.h> +#include <asm/asm-const.h> + +#define EX_TYPE_NONE 0 +#define EX_TYPE_FIXUP 1 +#define EX_TYPE_BPF 2 +#define EX_TYPE_UA_STORE 3 +#define EX_TYPE_UA_LOAD_MEM 4 +#define EX_TYPE_UA_LOAD_REG 5 + +#define EX_DATA_REG_ERR_SHIFT 0 +#define EX_DATA_REG_ERR GENMASK(3, 0) + +#define EX_DATA_REG_ADDR_SHIFT 4 +#define EX_DATA_REG_ADDR GENMASK(7, 4) + +#define EX_DATA_LEN_SHIFT 8 +#define EX_DATA_LEN GENMASK(11, 8) + +#define __EX_TABLE(_section, _fault, _target, _type) \ + stringify_in_c(.section _section,"a";) \ + stringify_in_c(.align 4;) \ + stringify_in_c(.long (_fault) - .;) \ + stringify_in_c(.long (_target) - .;) \ + stringify_in_c(.short (_type);) \ + stringify_in_c(.short 0;) \ + stringify_in_c(.previous) + +#define __EX_TABLE_UA(_section, _fault, _target, _type, _regerr, _regaddr, _len)\ + stringify_in_c(.section _section,"a";) \ + stringify_in_c(.align 4;) \ + stringify_in_c(.long (_fault) - .;) \ + stringify_in_c(.long (_target) - .;) \ + stringify_in_c(.short (_type);) \ + stringify_in_c(.macro extable_reg regerr, regaddr;) \ + stringify_in_c(.set .Lfound, 0;) \ + stringify_in_c(.set .Lcurr, 0;) \ + stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \ + stringify_in_c( .ifc "\regerr", "%%r\rs";) \ + stringify_in_c( .set .Lfound, 1;) \ + stringify_in_c( .set .Lregerr, .Lcurr;) \ + stringify_in_c( .endif;) \ + stringify_in_c( .set .Lcurr, .Lcurr+1;) \ + stringify_in_c(.endr;) \ + stringify_in_c(.ifne (.Lfound != 1);) \ + stringify_in_c( .error "extable_reg: bad register argument1";) \ + stringify_in_c(.endif;) \ + stringify_in_c(.set .Lfound, 0;) \ + stringify_in_c(.set .Lcurr, 0;) \ + stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \ + stringify_in_c( .ifc "\regaddr", "%%r\rs";) \ + stringify_in_c( .set .Lfound, 1;) \ + stringify_in_c( .set .Lregaddr, .Lcurr;) \ + stringify_in_c( .endif;) \ + stringify_in_c( .set .Lcurr, .Lcurr+1;) \ + stringify_in_c(.endr;) \ + stringify_in_c(.ifne (.Lfound != 1);) \ + stringify_in_c( .error "extable_reg: bad register argument2";) \ + stringify_in_c(.endif;) \ + stringify_in_c(.short .Lregerr << EX_DATA_REG_ERR_SHIFT | \ + .Lregaddr << EX_DATA_REG_ADDR_SHIFT | \ + _len << EX_DATA_LEN_SHIFT;) \ + stringify_in_c(.endm;) \ + stringify_in_c(extable_reg _regerr,_regaddr;) \ + stringify_in_c(.purgem extable_reg;) \ + stringify_in_c(.previous) + +#define EX_TABLE(_fault, _target) \ + __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FIXUP) + +#define EX_TABLE_AMODE31(_fault, _target) \ + __EX_TABLE(.amode31.ex_table, _fault, _target, EX_TYPE_FIXUP) + +#define EX_TABLE_UA_STORE(_fault, _target, _regerr) \ + __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_STORE, _regerr, _regerr, 0) + +#define EX_TABLE_UA_LOAD_MEM(_fault, _target, _regerr, _regmem, _len) \ + __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_MEM, _regerr, _regmem, _len) + +#define EX_TABLE_UA_LOAD_REG(_fault, _target, _regerr, _regzero) \ + __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REG, _regerr, _regzero, 0) + +#endif /* __ASM_EXTABLE_H */ |