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MIPS: ptrace: Also initialize the FP context on individual FCSR writes

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Complement commit ac9ad83bc3 ("MIPS: prevent FP context set via ptrace
being discarded") and also initialize the FP context whenever FCSR alone
is written with a PTRACE_POKEUSR request addressing FPC_CSR, rather than
along with the full FPU register set in the case of the PTRACE_SETFPREGS
request.

Signed-off-by: Maciej W. Rozycki <[email protected]>
Cc: Paul Burton <[email protected]>
Cc: James Hogan <[email protected]>
Cc: [email protected]
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/14459/
Signed-off-by: Ralf Baechle <[email protected]>
This commit is contained in:
Maciej W. Rozycki 2016-10-28 08:20:09 +01:00 • committed by Ralf Baechle
commit c9e5603974
1 changed files with 1 additions and 0 deletions
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1
arch/mips/kernel/ptrace.c
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@ -817,6 +817,7 @@ long arch_ptrace(struct task_struct *child, long request,
break;
#endif
case FPC_CSR:
init_fp_ctx(child);
ptrace_setfcr31(child, data);
break;
case DSP_BASE ... DSP_BASE + 5: {