2018-06-28 23:12:33 +00:00
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:(before "End Single-Byte Opcodes")
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case 0xcd: { // int imm8 (software interrupt)
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2018-07-17 05:18:18 +00:00
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trace(2, "run") << "syscall" << end();
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2018-06-28 23:12:33 +00:00
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uint8_t code = next();
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if (code != 0x80) {
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raise << "Unimplemented interrupt code " << HEXBYTE << code << '\n' << end();
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raise << " Only `int 80h` supported for now.\n" << end();
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break;
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}
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process_int80();
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break;
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}
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:(code)
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void process_int80() {
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switch (Reg[EAX].u) {
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case 1:
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2018-07-16 15:19:20 +00:00
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exit(/*exit code*/Reg[EBX].u);
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2018-07-08 06:38:59 +00:00
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break;
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case 3:
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2018-07-10 14:14:07 +00:00
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Reg[EAX].i = read(/*file descriptor*/Reg[EBX].u, /*memory buffer*/mem_addr_u8(Reg[ECX].u), /*size*/Reg[EDX].u);
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2018-07-08 06:38:59 +00:00
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break;
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2018-07-16 15:19:20 +00:00
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case 4:
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Reg[EAX].i = write(/*file descriptor*/Reg[EBX].u, /*memory buffer*/mem_addr_u8(Reg[ECX].u), /*size*/Reg[EDX].u);
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break;
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2018-06-28 23:12:33 +00:00
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}
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}
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2018-07-09 06:00:15 +00:00
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:(before "End Includes")
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#include <unistd.h>
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