27 lines
1.0 KiB
C
27 lines
1.0 KiB
C
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/* No libc starting point. Jump straight into action! */
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__attribute__((naked)) __attribute__((force_align_arg_pointer))
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__attribute__((noreturn)) extern void
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_start(void) {
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__asm__ volatile("xorl %ebp, %ebp\n"
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"movl (%esp), %ecx\n"
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"leal 4(%esp), %edx\n"
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/* 3. Align the stack pointer to a 16-byte boundary */
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"andl $-16, %esp\n"
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/* 4. Reserve stack space for main's arguments + padding
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We need to pass 2 arguments (8 bytes).
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To keep %esp 16-byte aligned before the "call",
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we allocate 16 bytes total. */
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"subl $16, %esp\n"
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/* 5. Place arguments onto the newly aligned stack */
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"movl %ecx, (%esp)\n"
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"movl %edx, 4(%esp)\n"
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"call plr_display_x11_main\n"
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"movl %eax, %ebx\n"
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"movl $1, %eax\n"
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"int $0x80");
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}
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