29 lines
608 B
C++
29 lines
608 B
C++
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#include <BAN/Formatter.h>
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#include <kernel/Syscall.h>
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#define USERSPACE __attribute__((section(".userspace")))
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USERSPACE int syscall(int syscall, void* arg1 = nullptr, void* arg2 = nullptr, void* arg3 = nullptr)
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{
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int ret;
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asm volatile("int $0x80" : "=a"(ret) : "a"(syscall), "b"(arg1), "c"(arg2), "d"(arg3) : "memory");
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return ret;
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}
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USERSPACE void user_putc(char ch)
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{
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syscall(SYS_PUTC, (void*)(uintptr_t)ch);
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}
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USERSPACE void print(const char* str)
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{
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while (*str)
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user_putc(*str++);
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}
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USERSPACE void userspace_entry()
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{
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BAN::Formatter::println(user_putc, "Hello {}!", "World");
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for (;;);
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}
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