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Matheus
33 lines
483 B
C
33 lines
483 B
C
#include <kernel/syscalls.h>
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#include <arch/msr.h>
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#include <errno.h>
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#define ARCH_CTL_GSBASE 0
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#define ARCH_CTL_FSBASE 1
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syscallret syscall_arch_ctl(int func, void* arg){
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syscallret retv;
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retv.errno = 0;
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retv.ret = 0;
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switch(func){
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case ARCH_CTL_GSBASE:
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wrmsr(MSR_KERNELGSBASE, (uint64_t)arg);
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break;
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case ARCH_CTL_FSBASE:
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wrmsr(MSR_FSBASE, (uint64_t)arg);
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break;
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default:
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retv.errno = EINVAL;
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}
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if(retv.errno)
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retv.ret = -1;
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return retv;
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}
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