Differential D21131 Diff 60376 libexec/rtld-elf/powerpc64/rtld_start.S

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libexec/rtld-elf/powerpc64/rtld_start.S

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	.extern _GLOBAL_OFFSET_TABLE_			.extern _GLOBAL_OFFSET_TABLE_
	.extern _DYNAMIC			.extern _DYNAMIC

	_ENTRY(_rtld_start)			_ENTRY(_rtld_start)
	stdu %r1,-144(%r1) /* 16-byte aligned stack for reg saves +			stdu %r1,-144(%r1) /* 16-byte aligned stack for reg saves +
	exit_proc & obj _rtld args +			exit_proc & obj _rtld args +
	backchain & lrsave stack frame */			backchain & lrsave stack frame */
	std %r3,96(%r1) /* argc */
				/* Save and restore only initial argv, because _rtld will modify
				* argv and envp if invoked explicitly, making it necessary to
				* load the (possibly) adjusted values from the stack.
				*/
	std %r4,104(%r1) /* argv */			std %r4,104(%r1) /* argv */
	std %r5,112(%r1) /* envp */
	/* std %r6,120(%r1) // obj (always 0) */			/* std %r6,120(%r1) // obj (always 0) */
	/* std %r7,128(%r1) // cleanup (always 0) */			/* std %r7,128(%r1) // cleanup (always 0) */
	std %r8,136(%r1) /* ps_strings */			std %r8,136(%r1) /* ps_strings */

	/*			/*
	* Perform initial relocation of ld-elf.so. Not as easy as it			* Perform initial relocation of ld-elf.so. Not as easy as it
	* sounds.			* sounds.
	* - perform small forward branch to put PC into link reg			* - perform small forward branch to put PC into link reg
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	#else			#else
	mr %r12,%r3			mr %r12,%r3
	#endif			#endif
	mtlr %r3			mtlr %r3

	/*			/*
	* Restore args, with new obj/exit proc			* Restore args, with new obj/exit proc
	*/			*/
	ld %r3,96(%r1) /* argc */
	ld %r4,104(%r1) /* argv */			ld %r4,104(%r1) /* argv */
	ld %r5,112(%r1) /* envp */			ld %r3,-8(%r4) /* argc */

				/* envp = argv + argc + 1 */
				addi %r5,%r3,1
				sldi %r5,%r5,3 /* x8 */
				add %r5,%r4,%r5

	ld %r6,120(%r1) /* obj */			ld %r6,120(%r1) /* obj */
	ld %r7,128(%r1) /* exit proc */			ld %r7,128(%r1) /* exit proc */
	ld %r8,136(%r1) /* ps_strings */			ld %r8,136(%r1) /* ps_strings */

	blrl /* _start(argc, argv, envp, obj, cleanup, ps_strings) */			blrl /* _start(argc, argv, envp, obj, cleanup, ps_strings) */

	li %r0,1 /* _exit() */			li %r0,1 /* _exit() */
	sc			sc
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