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From: | Richard Henderson |
Subject: | Re: [Qemu-devel] Fwd: [PATCH v2.5] fixup! linux-user/sh4: Notice gUSA regions during signal delivery |
Date: | Fri, 7 Jul 2017 09:00:15 -1000 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 |
On 07/07/2017 07:57 AM, Richard Henderson wrote:
+ /* ??? The SH4 kernel checks for and address above 0xC0000000. + However, the page mappings in qemu linux-user aren't as restricted + and we wind up with the normal stack mapped above 0xF0000000. + That said, there is no reason why the kernel should be allowing + a gUSA region that spans 1GB. Use a tighter check here, for what + can actually be enabled by the immediate move. */
Additionally, I can (and should) fix the address space problem for SH4 in linux-user/main.c, where we have already done so for MIPS and Nios2.
See the initialization of reserved_va. r~
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