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1 #ifndef _ASM_X86_LINKAGE_H |
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2 #define _ASM_X86_LINKAGE_H |
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3 |
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4 #undef notrace |
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5 #define notrace __attribute__((no_instrument_function)) |
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6 |
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7 #ifdef CONFIG_X86_64 |
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8 #define __ALIGN .p2align 4,,15 |
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9 #define __ALIGN_STR ".p2align 4,,15" |
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10 #endif |
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11 |
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12 #ifdef CONFIG_X86_32 |
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13 #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0))) |
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14 /* |
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15 * For 32-bit UML - mark functions implemented in assembly that use |
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16 * regparm input parameters: |
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17 */ |
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18 #define asmregparm __attribute__((regparm(3))) |
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19 |
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20 /* |
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21 * Make sure the compiler doesn't do anything stupid with the |
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22 * arguments on the stack - they are owned by the *caller*, not |
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23 * the callee. This just fools gcc into not spilling into them, |
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24 * and keeps it from doing tailcall recursion and/or using the |
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25 * stack slots for temporaries, since they are live and "used" |
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26 * all the way to the end of the function. |
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27 * |
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28 * NOTE! On x86-64, all the arguments are in registers, so this |
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29 * only matters on a 32-bit kernel. |
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30 */ |
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31 #define asmlinkage_protect(n, ret, args...) \ |
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32 __asmlinkage_protect##n(ret, ##args) |
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33 #define __asmlinkage_protect_n(ret, args...) \ |
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34 __asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args) |
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35 #define __asmlinkage_protect0(ret) \ |
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36 __asmlinkage_protect_n(ret) |
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37 #define __asmlinkage_protect1(ret, arg1) \ |
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38 __asmlinkage_protect_n(ret, "g" (arg1)) |
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39 #define __asmlinkage_protect2(ret, arg1, arg2) \ |
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40 __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2)) |
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41 #define __asmlinkage_protect3(ret, arg1, arg2, arg3) \ |
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42 __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3)) |
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43 #define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \ |
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44 __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \ |
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45 "g" (arg4)) |
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46 #define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \ |
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47 __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \ |
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48 "g" (arg4), "g" (arg5)) |
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49 #define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \ |
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50 __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \ |
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51 "g" (arg4), "g" (arg5), "g" (arg6)) |
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52 |
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53 #endif |
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54 |
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55 #ifdef CONFIG_X86_ALIGNMENT_16 |
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56 #define __ALIGN .align 16,0x90 |
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57 #define __ALIGN_STR ".align 16,0x90" |
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58 #endif |
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59 |
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60 #endif /* _ASM_X86_LINKAGE_H */ |
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61 |