2 * AcessOS Basic C Library
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4 #include "stdio_int.h"
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7 // === PROTOTYPES ===
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8 static void cpuid(uint32_t Num, uint32_t *EAX, uint32_t *EBX, uint32_t *EDX, uint32_t *ECX);
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11 extern char **_envp;
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12 extern struct sFILE _iob[];
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13 extern struct sFILE *stdin;
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14 extern struct sFILE *stdout;
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15 extern struct sFILE *stderr;
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16 // --- CPU Features ---
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17 tCPUID gCPU_Features;
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22 * \brief Stub Entrypoint
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23 * \param BaseAddress Unused - Load Address of libc
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24 * \param argc Unused - Argument Count (0 for current version of ld-acess)
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25 * \param argv Unused - Arguments (NULL for current version of ld-acess)
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26 * \param envp Environment Pointer
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28 int SoMain(unsigned int BaseAddress, int argc, char **argv, char **envp)
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33 // Init FileIO Pointers
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35 stdin->FD = 0; stdin->Flags = FILE_FLAG_MODE_READ;
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37 stdout->FD = 1; stdout->Flags = FILE_FLAG_MODE_WRITE;
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39 stderr->FD = 2; stderr->Flags = FILE_FLAG_MODE_WRITE;
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44 cpuid(1, NULL, NULL, &edx, &ecx);
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45 gCPU_Features.SSE = edx & (1 << 25); // SSE
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46 gCPU_Features.SSE2 = edx & (1 << 26); // SSE2
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55 * \brief Call the CPUID opcode
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57 static void cpuid(uint32_t Num, uint32_t *EAX, uint32_t *EBX, uint32_t *EDX, uint32_t *ECX)
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59 uint32_t eax, ebx, edx, ecx;
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61 __asm__ __volatile__ (
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63 : "=a"(eax), "=c"(ecx), "=d"(edx)
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