diff options
Diffstat (limited to 'arch/powerpc/kernel/process.c')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 7949c203cb8..ea6ad7a2a7e 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -149,10 +149,32 @@ void flush_altivec_to_thread(struct task_struct *tsk) } } -int dump_task_altivec(struct pt_regs *regs, elf_vrregset_t *vrregs) +int dump_task_altivec(struct task_struct *tsk, elf_vrregset_t *vrregs) { - flush_altivec_to_thread(current); - memcpy(vrregs, ¤t->thread.vr[0], sizeof(*vrregs)); + /* ELF_NVRREG includes the VSCR and VRSAVE which we need to save + * separately, see below */ + const int nregs = ELF_NVRREG - 2; + elf_vrreg_t *reg; + u32 *dest; + + if (tsk == current) + flush_altivec_to_thread(tsk); + + reg = (elf_vrreg_t *)vrregs; + + /* copy the 32 vr registers */ + memcpy(reg, &tsk->thread.vr[0], nregs * sizeof(*reg)); + reg += nregs; + + /* copy the vscr */ + memcpy(reg, &tsk->thread.vscr, sizeof(*reg)); + reg++; + + /* vrsave is stored in the high 32bit slot of the final 128bits */ + memset(reg, 0, sizeof(*reg)); + dest = (u32 *)reg; + *dest = tsk->thread.vrsave; + return 1; } #endif /* CONFIG_ALTIVEC */ |