arch/s390/include/asm/asm-extable.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_EXTABLE_H
   3 #define __ASM_EXTABLE_H
   4
   5 #include <linux/stringify.h>
   6 #include <linux/bits.h>
   7 #include <asm/asm-const.h>
   8
   9 #define EX_TYPE_NONE            0
  10 #define EX_TYPE_FIXUP           1
  11 #define EX_TYPE_BPF             2
  12 #define EX_TYPE_UA_FAULT        3
  13 #define EX_TYPE_UA_LOAD_REG     5
  14 #define EX_TYPE_UA_LOAD_REGPAIR 6
  15 #define EX_TYPE_ZEROPAD         7
  16 #define EX_TYPE_FPC             8
  17
  18 #define EX_DATA_REG_ERR_SHIFT   0
  19 #define EX_DATA_REG_ERR         GENMASK(3, 0)
  20
  21 #define EX_DATA_REG_ADDR_SHIFT  4
  22 #define EX_DATA_REG_ADDR        GENMASK(7, 4)
  23
  24 #define EX_DATA_LEN_SHIFT       8
  25 #define EX_DATA_LEN             GENMASK(11, 8)
  26
  27 #define __EX_TABLE(_section, _fault, _target, _type, _regerr, _regaddr, _len)   \
  28         stringify_in_c(.section _section,"a";)                                  \
  29         stringify_in_c(.balign  4;)                                             \
  30         stringify_in_c(.long    (_fault) - .;)                                  \
  31         stringify_in_c(.long    (_target) - .;)                                 \
  32         stringify_in_c(.short   (_type);)                                       \
  33         stringify_in_c(.macro   extable_reg regerr, regaddr;)                   \
  34         stringify_in_c(.set     .Lfound, 0;)                                    \
  35         stringify_in_c(.set     .Lcurr, 0;)                                     \
  36         stringify_in_c(.irp     rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;)      \
  37         stringify_in_c(         .ifc    "\regerr", "%%r\rs";)                   \
  38         stringify_in_c(                 .set    .Lfound, 1;)                    \
  39         stringify_in_c(                 .set    .Lregerr, .Lcurr;)              \
  40         stringify_in_c(         .endif;)                                        \
  41         stringify_in_c(         .set    .Lcurr, .Lcurr+1;)                      \
  42         stringify_in_c(.endr;)                                                  \
  43         stringify_in_c(.ifne    (.Lfound != 1);)                                \
  44         stringify_in_c(         .error  "extable_reg: bad register argument1";) \
  45         stringify_in_c(.endif;)                                                 \
  46         stringify_in_c(.set     .Lfound, 0;)                                    \
  47         stringify_in_c(.set     .Lcurr, 0;)                                     \
  48         stringify_in_c(.irp     rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;)      \
  49         stringify_in_c(         .ifc    "\regaddr", "%%r\rs";)                  \
  50         stringify_in_c(                 .set    .Lfound, 1;)                    \
  51         stringify_in_c(                 .set    .Lregaddr, .Lcurr;)             \
  52         stringify_in_c(         .endif;)                                        \
  53         stringify_in_c(         .set    .Lcurr, .Lcurr+1;)                      \
  54         stringify_in_c(.endr;)                                                  \
  55         stringify_in_c(.ifne    (.Lfound != 1);)                                \
  56         stringify_in_c(         .error  "extable_reg: bad register argument2";) \
  57         stringify_in_c(.endif;)                                                 \
  58         stringify_in_c(.short   .Lregerr << EX_DATA_REG_ERR_SHIFT |             \
  59                                 .Lregaddr << EX_DATA_REG_ADDR_SHIFT |           \
  60                                 _len << EX_DATA_LEN_SHIFT;)                     \
  61         stringify_in_c(.endm;)                                                  \
  62         stringify_in_c(extable_reg _regerr,_regaddr;)                           \
  63         stringify_in_c(.purgem  extable_reg;)                                   \
  64         stringify_in_c(.previous)
  65
  66 #define EX_TABLE(_fault, _target)                                       \
  67         __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FIXUP, __stringify(%%r0), __stringify(%%r0), 0)
  68
  69 #define EX_TABLE_AMODE31(_fault, _target)                               \
  70         __EX_TABLE(.amode31.ex_table, _fault, _target, EX_TYPE_FIXUP, __stringify(%%r0), __stringify(%%r0), 0)
  71
  72 #define EX_TABLE_UA_FAULT(_fault, _target, _regerr)                     \
  73         __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_FAULT, _regerr, _regerr, 0)
  74
  75 #define EX_TABLE_UA_LOAD_REG(_fault, _target, _regerr, _regzero)        \
  76         __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REG, _regerr, _regzero, 0)
  77
  78 #define EX_TABLE_UA_LOAD_REGPAIR(_fault, _target, _regerr, _regzero)    \
  79         __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REGPAIR, _regerr, _regzero, 0)
  80
  81 #define EX_TABLE_ZEROPAD(_fault, _target, _regdata, _regaddr)           \
  82         __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_ZEROPAD, _regdata, _regaddr, 0)
  83
  84 #define EX_TABLE_FPC(_fault, _target)                                   \
  85         __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FPC, __stringify(%%r0), __stringify(%%r0), 0)
  86
  87 #endif /* __ASM_EXTABLE_H */