linux-2.6.33/vector_stub()(arm) の履歴(No.1)

• 履歴一覧
• 差分 を表示
• 現在との差分 を表示
• ソース を表示
• linux-2.6.33/vector_stub()(arm) へ行く。
  • 1 (2010-11-26 (金) 10:37:06)
  • 2 (2010-11-26 (金) 11:30:47)
  • 3 (2010-11-26 (金) 15:46:34)
  • 4 (2011-01-17 (月) 15:49:31)

参照元†

• linux-2.6.33/vector_stub()

説明†

• パス: [[linux-2.6.33/]]

• FIXME: これは何？
  • 説明

引数†

返り値†

参考†

実装†

/*
 * Vector stubs.
 *
 * This code is copied to 0xffff0200 so we can use branches in the
 * vectors, rather than ldr's.  Note that this code must not
 * exceed 0x300 bytes.
 *
 * Common stub entry macro:
 *   Enter in IRQ mode, spsr = SVC/USR CPSR, lr = SVC/USR PC
 *
 * SP points to a minimal amount of processor-private memory, the address
 * of which is copied into r0 for the mode specific abort handler.
 */
	.macro	vector_stub, name, mode, correction=0
	.align	5

vector_\name:
	.if \correction
	sub	lr, lr, #\correction
	.endif

	@
	@ Save r0, lr_<exception> (parent PC) and spsr_<exception>
	@ (parent CPSR)
	@
	stmia	sp, {r0, lr}		@ save r0, lr
	mrs	lr, spsr
	str	lr, [sp, #8]		@ save spsr

	@
	@ Prepare for SVC32 mode.  IRQs remain disabled.
	@
	mrs	r0, cpsr
	eor	r0, r0, #(\mode ^ SVC_MODE | PSR_ISETSTATE)
	msr	spsr_cxsf, r0

	@
	@ the branch table must immediately follow this code
	@
	and	lr, lr, #0x0f
 THUMB(	adr	r0, 1f			)
 THUMB(	ldr	lr, [r0, lr, lsl #2]	)
	mov	r0, sp
 ARM(	ldr	lr, [pc, lr, lsl #2]	)
	movs	pc, lr			@ branch to handler in SVC mode
ENDPROC(vector_\name)

	.align	2
	@ handler addresses follow this label
1:
	.endm

コメント†