2 * AcessOS Basic C Library
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4 #include "stdio_int.h"
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9 // === PROTOTYPES ===
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11 static void cpuid(uint32_t Num, uint32_t *EAX, uint32_t *EBX, uint32_t *EDX, uint32_t *ECX);
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15 extern char **_envp;
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16 extern struct sFILE _iob[];
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17 extern struct sFILE *stdin;
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18 extern struct sFILE *stdout;
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19 extern struct sFILE *stderr;
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20 // --- CPU Features ---
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22 tCPUID gCPU_Features;
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28 * \brief Stub Entrypoint
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29 * \param BaseAddress Unused - Load Address of libc
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30 * \param argc Unused - Argument Count (0 for current version of ld-acess)
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31 * \param argv Unused - Arguments (NULL for current version of ld-acess)
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32 * \param envp Environment Pointer
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34 int SoMain(unsigned int BaseAddress, int argc, char **argv, char **envp)
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39 // Init FileIO Pointers
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41 stdin->FD = 0; stdin->Flags = FILE_FLAG_MODE_READ;
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43 stdout->FD = 1; stdout->Flags = FILE_FLAG_MODE_WRITE;
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45 stderr->FD = 2; stderr->Flags = FILE_FLAG_MODE_WRITE;
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50 cpuid(1, NULL, NULL, &edx, &ecx);
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51 gCPU_Features.SSE = edx & (1 << 25); // SSE
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52 gCPU_Features.SSE2 = edx & (1 << 26); // SSE2
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62 * \brief Call the CPUID opcode
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64 static void cpuid(uint32_t Num, uint32_t *EAX, uint32_t *EBX, uint32_t *EDX, uint32_t *ECX)
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66 uint32_t eax, ebx, edx, ecx;
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68 __asm__ __volatile__ (
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70 : "=a"(eax), "=c"(ecx), "=d"(edx)
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