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parisc architecture fixes for kernel v5.19-rc5:

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Two important fixes for bugs in code which was added in kernel v5.18:
 
 * Fix userspace signal failures on 32-bit kernel due to a bug in vDSO
 
 * Fix 32-bit load-word unalignment exception handler which returned
   wrong values
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Merge tag 'for-5.19/parisc-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc architecture fixes from Helge Deller:
 "Two important fixes for bugs in code which was added in 5.18:

   - Fix userspace signal failures on 32-bit kernel due to a bug in vDSO

   - Fix 32-bit load-word unalignment exception handler which returned
     wrong values"

* tag 'for-5.19/parisc-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Fix vDSO signal breakage on 32-bit kernel
  parisc/unaligned: Fix emulate_ldw() breakage
This commit is contained in:
Linus Torvalds 2022-07-02 10:23:36 -07:00
commit 34074da542
2 changed files with 6 additions and 1 deletions
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5
arch/parisc/kernel/asm-offsets.c
View File

@ -224,8 +224,13 @@ int main(void)
BLANK();
DEFINE(ASM_SIGFRAME_SIZE, PARISC_RT_SIGFRAME_SIZE);
DEFINE(SIGFRAME_CONTEXT_REGS, offsetof(struct rt_sigframe, uc.uc_mcontext) - PARISC_RT_SIGFRAME_SIZE);
#ifdef CONFIG_64BIT
DEFINE(ASM_SIGFRAME_SIZE32, PARISC_RT_SIGFRAME_SIZE32);
DEFINE(SIGFRAME_CONTEXT_REGS32, offsetof(struct compat_rt_sigframe, uc.uc_mcontext) - PARISC_RT_SIGFRAME_SIZE32);
#else
DEFINE(ASM_SIGFRAME_SIZE32, PARISC_RT_SIGFRAME_SIZE);
DEFINE(SIGFRAME_CONTEXT_REGS32, offsetof(struct rt_sigframe, uc.uc_mcontext) - PARISC_RT_SIGFRAME_SIZE);
#endif
BLANK();
DEFINE(ICACHE_BASE, offsetof(struct pdc_cache_info, ic_base));
DEFINE(ICACHE_STRIDE, offsetof(struct pdc_cache_info, ic_stride));

2
arch/parisc/kernel/unaligned.c
View File

@ -146,7 +146,7 @@ static int emulate_ldw(struct pt_regs *regs, int toreg, int flop)
" depw %%r0,31,2,%4\n"
"1: ldw 0(%%sr1,%4),%0\n"
"2: ldw 4(%%sr1,%4),%3\n"
" subi 32,%4,%2\n"
" subi 32,%2,%2\n"
" mtctl %2,11\n"
" vshd %0,%3,%0\n"
"3: \n"