arch-bare-x86-64: enable argc and argv

a82a8054 · Danilo Sabato · Alessandro Rubini · fe9b8884 · a82a8054
Commit a82a8054 authored Feb 28, 2013 by Danilo Sabato Committed by Alessandro Rubini Feb 28, 2013
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crt0.S arch-bare-x86-64/crt0.S +11 -1

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--- a/arch-bare-x86-64/crt0.S
+++ b/arch-bare-x86-64/crt0.S
@@ -6,6 +6,16 @@
 	.section .boot, "ax"
 	.extern ppsi_main

-	call ppsi_clear_bss /* In C, lazy me */
+        call ppsi_clear_bss /* In C, lazy me */
+
+	/* inspired from uClib */
+	
+	/* Pop argc and place it in the first parameter-passing register. */
+	popq %rdi 
+	/* Place argv in the second parameter-passing register. */
+	movq %rsp, %rsi
+	/* Align the stack at a 16-byte boundary. */
+	andq $~15, %rsp
+
 	call ppsi_main
 	.end
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