53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
#include "kernel.h"
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#include "common.h"
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extern char __bss[], __bss_end[], __stack_top[];
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struct sbiret sbi_call(long arg0, long arg1, long arg2, long arg3, long arg4,
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long arg5, long fid, long eid) {
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register long a0 __asm__("a0") = arg0;
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register long a1 __asm__("a1") = arg1;
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register long a2 __asm__("a2") = arg2;
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register long a3 __asm__("a3") = arg3;
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register long a4 __asm__("a4") = arg4;
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register long a5 __asm__("a5") = arg5;
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register long a6 __asm__("a6") = fid;
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register long a7 __asm__("a7") = eid;
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__asm__ __volatile__("ecall"
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: "=r"(a0), "=r"(a1)
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: "r"(a0), "r"(a1), "r"(a2), "r"(a3), "r"(a4), "r"(a5),
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"r"(a6), "r"(a7)
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: "memory");
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return (struct sbiret){.error = a0, .value = a1};
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}
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void putchar(char ch) {
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sbi_call(ch, 0, 0, 0, 0, 0, 0, 1 /* Console Putchar */);
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}
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void kernel_main(void) {
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// printf("\n\nHello %s\n", "friend :3");
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// printf("60 + 9 = %d, %x\n", 60 + 9, 0x1234abcd);
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//
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// for (;;) {
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// __asm__ __volatile__("wfi");
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// }
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memset(__bss, 0, (size_t) __bss_end - (size_t) __bss);
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PANIC("BOOOO!!! GET INFECTED WITH BOOTKID YOU SKID! 0x1337h@x0r");
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printf("you lucky bitch got away\n");
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}
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__attribute__((section(".text.boot")))
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__attribute__((naked))
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void boot(void) {
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__asm__ __volatile__(
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"mv sp, %[stack_top]\n" // Set the stack pointer
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"j kernel_main\n" // Jump to the kernel main function
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:
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: [stack_top] "r" (__stack_top) // Pass the stack top address as %[stack_top]
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);
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}
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