sh: fix getcontext implementation
parent
82f734ab47
commit
f9a3f65f5b
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@ -15,25 +15,6 @@
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ALIAS(getcontext, libucontext_getcontext)
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FUNC(libucontext_getcontext)
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mov #0, r0 /* zero out r0, not preserved per ABI */
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mov.l r0, @(REG_OFFSET(0), r4) /* save GPRs r0-r15 */
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mov.l r1, @(REG_OFFSET(1), r4)
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mov.l r2, @(REG_OFFSET(2), r4)
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mov.l r3, @(REG_OFFSET(3), r4)
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mov.l r4, @(REG_OFFSET(4), r4)
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mov.l r5, @(REG_OFFSET(5), r4)
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mov.l r6, @(REG_OFFSET(6), r4)
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mov.l r7, @(REG_OFFSET(7), r4)
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mov.l r8, @(REG_OFFSET(8), r4)
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mov.l r9, @(REG_OFFSET(9), r4)
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mov.l r10, @(REG_OFFSET(10), r4)
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mov.l r11, @(REG_OFFSET(11), r4)
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mov.l r12, @(REG_OFFSET(12), r4)
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mov.l r13, @(REG_OFFSET(13), r4)
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mov.l r14, @(REG_OFFSET(14), r4)
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mov.l r15, @(REG_OFFSET(15), r4)
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mov r4, r0 /* move r4 to r0, and increment by REG_OFFSET(REG_MACL) + REG_SZ. */
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add #(REG_OFFSET(REG_MACL + 1)), r0
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@ -48,5 +29,27 @@ FUNC(libucontext_getcontext)
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sts.l pr, @-r0 /* save current PR */
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sts.l pr, @-r0 /* save current PR as PC as well */
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mov.l r15, @-r0 /* preserve registers backwards, from r15 to r1 */
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mov.l r14, @-r0
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mov.l r13, @-r0
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mov.l r12, @-r0
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mov.l r11, @-r0
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mov.l r10, @-r0
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mov.l r9, @-r0
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mov.l r8, @-r0
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mov.l r7, @-r0
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mov.l r6, @-r0
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mov.l r5, @-r0
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mov.l r4, @-r0
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mov.l r3, @-r0
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mov.l r2, @-r0
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mov.l r1, @-r0
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mov r0, r1
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mov #0, r0
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mov.l r0, @-r1 /* preserve r0 as explicit zero */
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mov #0, r0 /* set return value as zero */
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rts
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END(libucontext_getcontext)
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@ -15,25 +15,6 @@
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ALIAS(swapcontext, libucontext_swapcontext)
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FUNC(libucontext_swapcontext)
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mov #0, r0 /* zero out r0, not preserved per ABI */
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mov.l r0, @(REG_OFFSET(0), r4) /* save GPRs r0-r15 */
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mov.l r1, @(REG_OFFSET(1), r4)
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mov.l r2, @(REG_OFFSET(2), r4)
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mov.l r3, @(REG_OFFSET(3), r4)
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mov.l r4, @(REG_OFFSET(4), r4)
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mov.l r5, @(REG_OFFSET(5), r4)
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mov.l r6, @(REG_OFFSET(6), r4)
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mov.l r7, @(REG_OFFSET(7), r4)
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mov.l r8, @(REG_OFFSET(8), r4)
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mov.l r9, @(REG_OFFSET(9), r4)
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mov.l r10, @(REG_OFFSET(10), r4)
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mov.l r11, @(REG_OFFSET(11), r4)
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mov.l r12, @(REG_OFFSET(12), r4)
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mov.l r13, @(REG_OFFSET(13), r4)
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mov.l r14, @(REG_OFFSET(14), r4)
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mov.l r15, @(REG_OFFSET(15), r4)
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mov r4, r0 /* move r4 to r0, and increment by REG_OFFSET(REG_MACL) + REG_SZ. */
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add #(REG_OFFSET(REG_MACL + 1)), r0
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@ -48,6 +29,27 @@ FUNC(libucontext_swapcontext)
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sts.l pr, @-r0 /* save current PR */
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sts.l pr, @-r0 /* save current PR as PC as well */
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mov.l r15, @-r0 /* preserve registers backwards, from r15 to r1 */
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mov.l r14, @-r0
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mov.l r13, @-r0
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mov.l r12, @-r0
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mov.l r11, @-r0
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mov.l r10, @-r0
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mov.l r9, @-r0
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mov.l r8, @-r0
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mov.l r7, @-r0
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mov.l r6, @-r0
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mov.l r5, @-r0
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mov.l r4, @-r0
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mov.l r3, @-r0
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mov.l r2, @-r0
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mov.l r1, @-r0
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mov r0, r1
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mov #0, r0
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mov.l r0, @-r1 /* preserve r0 as explicit zero */
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mov r5, r0 /* now restore the new context */
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add #(REG_OFFSET(REG_PC)), r0 /* restore PR */
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