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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_S390_NOSPEC_ASM_H #define _ASM_S390_NOSPEC_ASM_H #include <asm/alternative-asm.h> #include <asm/asm-offsets.h> #include <asm/dwarf.h> #ifdef __ASSEMBLY__ #ifdef CC_USING_EXPOLINE _LC_BR_R1 = __LC_BR_R1 /* * The expoline macros are used to create thunks in the same format * as gcc generates them. The 'comdat' section flag makes sure that * the various thunks are merged into a single copy. */ .macro __THUNK_PROLOG_NAME name .pushsection .text.\name,"axG",@progbits,\name,comdat .globl \name .hidden \name .type \name,@function \name: CFI_STARTPROC .endm .macro __THUNK_EPILOG CFI_ENDPROC .popsection .endm .macro __THUNK_PROLOG_BR r1,r2 __THUNK_PROLOG_NAME __s390_indirect_jump_r\r2\()use_r\r1 .endm .macro __THUNK_PROLOG_BC d0,r1,r2 __THUNK_PROLOG_NAME __s390_indirect_branch_\d0\()_\r2\()use_\r1 .endm .macro __THUNK_BR r1,r2 jg __s390_indirect_jump_r\r2\()use_r\r1 .endm .macro __THUNK_BC d0,r1,r2 jg __s390_indirect_branch_\d0\()_\r2\()use_\r1 .endm .macro __THUNK_BRASL r1,r2,r3 brasl \r1,__s390_indirect_jump_r\r3\()use_r\r2 .endm .macro __DECODE_RR expand,reg,ruse .set __decode_fail,1 .irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 .ifc \reg,%r\r1 .irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 .ifc \ruse,%r\r2 \expand \r1,\r2 .set __decode_fail,0 .endif .endr .endif .endr .if __decode_fail == 1 .error "__DECODE_RR failed" .endif .endm .macro __DECODE_RRR expand,rsave,rtarget,ruse .set __decode_fail,1 .irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 .ifc \rsave,%r\r1 .irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 .ifc \rtarget,%r\r2 .irp r3,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 .ifc \ruse,%r\r3 \expand \r1,\r2,\r3 .set __decode_fail,0 .endif .endr .endif .endr .endif .endr .if __decode_fail == 1 .error "__DECODE_RRR failed" .endif .endm .macro __DECODE_DRR expand,disp,reg,ruse .set __decode_fail,1 .irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 .ifc \reg,%r\r1 .irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 .ifc \ruse,%r\r2 \expand \disp,\r1,\r2 .set __decode_fail,0 .endif .endr .endif .endr .if __decode_fail == 1 .error "__DECODE_DRR failed" .endif .endm .macro __THUNK_EX_BR reg,ruse # Be very careful when adding instructions to this macro! # The ALTERNATIVE replacement code has a .+10 which targets # the "br \reg" after the code has been patched. #ifdef CONFIG_HAVE_MARCH_Z10_FEATURES exrl 0,555f j . #else .ifc \reg,%r1 ALTERNATIVE "ex %r0,_LC_BR_R1", ".insn ril,0xc60000000000,0,.+10", 35 j . .else larl \ruse,555f ex 0,0(\ruse) j . .endif #endif 555: br \reg .endm .macro __THUNK_EX_BC disp,reg,ruse #ifdef CONFIG_HAVE_MARCH_Z10_FEATURES exrl 0,556f j . #else larl \ruse,556f ex 0,0(\ruse) j . #endif 556: b \disp(\reg) .endm .macro GEN_BR_THUNK reg,ruse=%r1 __DECODE_RR __THUNK_PROLOG_BR,\reg,\ruse __THUNK_EX_BR \reg,\ruse __THUNK_EPILOG .endm .macro GEN_B_THUNK disp,reg,ruse=%r1 __DECODE_DRR __THUNK_PROLOG_BC,\disp,\reg,\ruse __THUNK_EX_BC \disp,\reg,\ruse __THUNK_EPILOG .endm .macro BR_EX reg,ruse=%r1 557: __DECODE_RR __THUNK_BR,\reg,\ruse .pushsection .s390_indirect_branches,"a",@progbits .long 557b-. .popsection .endm .macro B_EX disp,reg,ruse=%r1 558: __DECODE_DRR __THUNK_BC,\disp,\reg,\ruse .pushsection .s390_indirect_branches,"a",@progbits .long 558b-. .popsection .endm .macro BASR_EX rsave,rtarget,ruse=%r1 559: __DECODE_RRR __THUNK_BRASL,\rsave,\rtarget,\ruse .pushsection .s390_indirect_branches,"a",@progbits .long 559b-. .popsection .endm #else .macro GEN_BR_THUNK reg,ruse=%r1 .endm .macro GEN_B_THUNK disp,reg,ruse=%r1 .endm .macro BR_EX reg,ruse=%r1 br \reg .endm .macro B_EX disp,reg,ruse=%r1 b \disp(\reg) .endm .macro BASR_EX rsave,rtarget,ruse=%r1 basr \rsave,\rtarget .endm #endif /* CC_USING_EXPOLINE */ #endif /* __ASSEMBLY__ */ #endif /* _ASM_S390_NOSPEC_ASM_H */ |