powerpc64/pseries: Fix hypervisor call with extra arguments
Some hypervisor calls, such as H_SEND_LOGICAL_LAN, take more arguments than are traditionally passed in registers. The HCALL ABI will accept these arguments in r11 and r12. With ELFv2 ABI, these arguments are 2 double-words lower than ELFv1 ABI, as two double-words in the stack frame are no longer used, and therefore removed from the frame. Fix the offsets for loading the registers for the HCALL. This fixes the phyp_llan driver with ELFv2 kernel. Submitted by: alfredo.junior_eldorado.org.br Differential Revision: https://reviews.freebsd.org/D20008
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=346589
@ -36,8 +36,13 @@
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ASENTRY(phyp_hcall)
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mflr %r0
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std %r0,16(%r1)
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#if defined(_CALL_ELF) && _CALL_ELF == 2
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ld %r11,96(%r1) /* Last couple args into volatile regs*/
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ld %r12,104(%r1)
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#else
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ld %r11,112(%r1) /* Last couple args into volatile regs*/
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ld %r12,120(%r1)
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#endif
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hc /* invoke the hypervisor */
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ld %r0,16(%r1)
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mtlr %r0
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