tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
parisc: Use PRIV_USER in syscall.S
Signed-off-by: Helge Deller <deller@gmx.de>
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arch/parisc/kernel/syscall.S
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arch/parisc/kernel/syscall.S
···
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lws_entry:
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gate lws_start, %r0 /* increase privilege */
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depi 3, 31, 2, %r31 /* Ensure we return into user mode. */
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depi PRIV_USER, 31, 2, %r31 /* Ensure we return into user mode. */
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/* Fill from 0xb8 to 0xe0 */
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.rept 10
···
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mechanism to work. DO NOT MOVE THIS CODE EVER! */
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set_thread_pointer:
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gate .+8, %r0 /* increase privilege */
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depi 3, 31, 2, %r31 /* Ensure we return into user mode. */
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depi PRIV_USER, 31, 2, %r31 /* Ensure we return into user mode. */
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be 0(%sr7,%r31) /* return to user space */
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mtctl %r26, %cr27 /* move arg0 to the control register */
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