0001
0002 #ifndef __ASM_EXTABLE_H
0003 #define __ASM_EXTABLE_H
0004
0005 #include <linux/stringify.h>
0006 #include <linux/bits.h>
0007 #include <asm/asm-const.h>
0008
0009 #define EX_TYPE_NONE 0
0010 #define EX_TYPE_FIXUP 1
0011 #define EX_TYPE_BPF 2
0012 #define EX_TYPE_UA_STORE 3
0013 #define EX_TYPE_UA_LOAD_MEM 4
0014 #define EX_TYPE_UA_LOAD_REG 5
0015
0016 #define EX_DATA_REG_ERR_SHIFT 0
0017 #define EX_DATA_REG_ERR GENMASK(3, 0)
0018
0019 #define EX_DATA_REG_ADDR_SHIFT 4
0020 #define EX_DATA_REG_ADDR GENMASK(7, 4)
0021
0022 #define EX_DATA_LEN_SHIFT 8
0023 #define EX_DATA_LEN GENMASK(11, 8)
0024
0025 #define __EX_TABLE(_section, _fault, _target, _type) \
0026 stringify_in_c(.section _section,"a";) \
0027 stringify_in_c(.align 4;) \
0028 stringify_in_c(.long (_fault) - .;) \
0029 stringify_in_c(.long (_target) - .;) \
0030 stringify_in_c(.short (_type);) \
0031 stringify_in_c(.short 0;) \
0032 stringify_in_c(.previous)
0033
0034 #define __EX_TABLE_UA(_section, _fault, _target, _type, _regerr, _regaddr, _len)\
0035 stringify_in_c(.section _section,"a";) \
0036 stringify_in_c(.align 4;) \
0037 stringify_in_c(.long (_fault) - .;) \
0038 stringify_in_c(.long (_target) - .;) \
0039 stringify_in_c(.short (_type);) \
0040 stringify_in_c(.macro extable_reg regerr, regaddr;) \
0041 stringify_in_c(.set .Lfound, 0;) \
0042 stringify_in_c(.set .Lcurr, 0;) \
0043 stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \
0044 stringify_in_c( .ifc "\regerr", "%%r\rs";) \
0045 stringify_in_c( .set .Lfound, 1;) \
0046 stringify_in_c( .set .Lregerr, .Lcurr;) \
0047 stringify_in_c( .endif;) \
0048 stringify_in_c( .set .Lcurr, .Lcurr+1;) \
0049 stringify_in_c(.endr;) \
0050 stringify_in_c(.ifne (.Lfound != 1);) \
0051 stringify_in_c( .error "extable_reg: bad register argument1";) \
0052 stringify_in_c(.endif;) \
0053 stringify_in_c(.set .Lfound, 0;) \
0054 stringify_in_c(.set .Lcurr, 0;) \
0055 stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \
0056 stringify_in_c( .ifc "\regaddr", "%%r\rs";) \
0057 stringify_in_c( .set .Lfound, 1;) \
0058 stringify_in_c( .set .Lregaddr, .Lcurr;) \
0059 stringify_in_c( .endif;) \
0060 stringify_in_c( .set .Lcurr, .Lcurr+1;) \
0061 stringify_in_c(.endr;) \
0062 stringify_in_c(.ifne (.Lfound != 1);) \
0063 stringify_in_c( .error "extable_reg: bad register argument2";) \
0064 stringify_in_c(.endif;) \
0065 stringify_in_c(.short .Lregerr << EX_DATA_REG_ERR_SHIFT | \
0066 .Lregaddr << EX_DATA_REG_ADDR_SHIFT | \
0067 _len << EX_DATA_LEN_SHIFT;) \
0068 stringify_in_c(.endm;) \
0069 stringify_in_c(extable_reg _regerr,_regaddr;) \
0070 stringify_in_c(.purgem extable_reg;) \
0071 stringify_in_c(.previous)
0072
0073 #define EX_TABLE(_fault, _target) \
0074 __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FIXUP)
0075
0076 #define EX_TABLE_AMODE31(_fault, _target) \
0077 __EX_TABLE(.amode31.ex_table, _fault, _target, EX_TYPE_FIXUP)
0078
0079 #define EX_TABLE_UA_STORE(_fault, _target, _regerr) \
0080 __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_STORE, _regerr, _regerr, 0)
0081
0082 #define EX_TABLE_UA_LOAD_MEM(_fault, _target, _regerr, _regmem, _len) \
0083 __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_MEM, _regerr, _regmem, _len)
0084
0085 #define EX_TABLE_UA_LOAD_REG(_fault, _target, _regerr, _regzero) \
0086 __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REG, _regerr, _regzero, 0)
0087
0088 #endif
