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head/lib/libc/x86/sys/pkru.c
| Show First 20 Lines • Show All 65 Lines • ▼ Show 20 Lines | x86_pkru_get_perm_hw(u_int keyidx, int *access, int *modify) | ||||
| } | } | ||||
| keyidx *= 2; | keyidx *= 2; | ||||
| pkru = rdpkru(); | pkru = rdpkru(); | ||||
| *access = (pkru & (1 << keyidx)) == 0; | *access = (pkru & (1 << keyidx)) == 0; | ||||
| *modify = (pkru & (2 << keyidx)) == 0; | *modify = (pkru & (2 << keyidx)) == 0; | ||||
| return (0); | return (0); | ||||
| } | } | ||||
| DEFINE_UIFUNC(, int, x86_pkru_get_perm, (u_int, int *, int *), static) | DEFINE_UIFUNC(, int, x86_pkru_get_perm, (u_int, int *, int *)) | ||||
| { | { | ||||
| return ((cpu_stdext_feature2 & CPUID_STDEXT2_OSPKE) == 0 ? | return ((cpu_stdext_feature2 & CPUID_STDEXT2_OSPKE) == 0 ? | ||||
| x86_pkru_get_perm_unsup : x86_pkru_get_perm_hw); | x86_pkru_get_perm_unsup : x86_pkru_get_perm_hw); | ||||
| } | } | ||||
| static int | static int | ||||
| x86_pkru_set_perm_unsup(u_int keyidx, int access, int modify) | x86_pkru_set_perm_unsup(u_int keyidx, int access, int modify) | ||||
| Show All 18 Lines | x86_pkru_set_perm_hw(u_int keyidx, int access, int modify) | ||||
| if (!access) | if (!access) | ||||
| pkru |= 1 << keyidx; | pkru |= 1 << keyidx; | ||||
| if (!modify) | if (!modify) | ||||
| pkru |= 2 << keyidx; | pkru |= 2 << keyidx; | ||||
| wrpkru(pkru); | wrpkru(pkru); | ||||
| return (0); | return (0); | ||||
| } | } | ||||
| DEFINE_UIFUNC(, int, x86_pkru_set_perm, (u_int, int, int), static) | DEFINE_UIFUNC(, int, x86_pkru_set_perm, (u_int, int, int)) | ||||
| { | { | ||||
| return ((cpu_stdext_feature2 & CPUID_STDEXT2_OSPKE) == 0 ? | return ((cpu_stdext_feature2 & CPUID_STDEXT2_OSPKE) == 0 ? | ||||
| x86_pkru_set_perm_unsup : x86_pkru_set_perm_hw); | x86_pkru_set_perm_unsup : x86_pkru_set_perm_hw); | ||||
| } | } | ||||
| int | int | ||||
| x86_pkru_protect_range(void *addr, unsigned long len, u_int keyidx, int flags) | x86_pkru_protect_range(void *addr, unsigned long len, u_int keyidx, int flags) | ||||
| Show All 21 Lines | |||||