mirror of
https://github.com/ps5-linux/ps5-linux-loader.git
synced 2026-05-09 16:32:00 +00:00
33 lines
991 B
C
33 lines
991 B
C
#include <stdint.h>
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#include "main.h"
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#include "../include/config.h"
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#include "boot_linux.h"
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#include "utils.h"
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__attribute__((section(".entry_point"), naked)) uint32_t main(void) {
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// We enter this function after CR3 was updated to 1:1 mapping
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// We need to point RSP/RBP to a good known valid address
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uint32_t ebax, ebx, ecx, edx;
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uint32_t cpu_id;
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__asm__ volatile("cpuid"
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: "=a"(ebax), "=b"(ebx), "=c"(ecx), "=d"(edx)
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: "a"(1));
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cpu_id = (ebx >> 24) & 0xFF;
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// We point to a location after the main linux boot code
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// Each CPU should have a different location
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uintptr_t new_rsp =
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(uintptr_t)hv_base_rsp + ((uint64_t)(cpu_id)*hv_stack_size);
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// WARNING: This invalidates current local variables
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__asm__ volatile("movq %0, %%rsp \n\t"
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"movq %%rsp, %%rbp \n\t"
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:
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: "r"(new_rsp)
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: "rbp", "memory");
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entry();
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} |