diff options
Diffstat (limited to 'arch/mips/kernel/process.c')
| -rw-r--r-- | arch/mips/kernel/process.c | 45 |
1 files changed, 27 insertions, 18 deletions
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c index c6a041d9d05..0a1ec0f3bef 100644 --- a/arch/mips/kernel/process.c +++ b/arch/mips/kernel/process.c @@ -32,6 +32,7 @@ #include <asm/cpu.h> #include <asm/dsp.h> #include <asm/fpu.h> +#include <asm/msa.h> #include <asm/pgtable.h> #include <asm/mipsregs.h> #include <asm/processor.h> @@ -60,15 +61,13 @@ void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp) /* New thread loses kernel privileges. */ status = regs->cp0_status & ~(ST0_CU0|ST0_CU1|ST0_FR|KU_MASK); -#ifdef CONFIG_64BIT - status |= test_thread_flag(TIF_32BIT_REGS) ? 0 : ST0_FR; -#endif status |= KU_USER; regs->cp0_status = status; clear_used_math(); clear_fpu_owner(); - if (cpu_has_dsp) - __init_dsp(); + init_dsp(); + clear_thread_flag(TIF_MSA_CTX_LIVE); + disable_msa(); regs->cp0_epc = pc; regs->regs[29] = sp; } @@ -93,7 +92,9 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, preempt_disable(); - if (is_fpu_owner()) + if (is_msa_enabled()) + save_msa(p); + else if (is_fpu_owner()) save_fp(p); if (cpu_has_dsp) @@ -139,13 +140,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, */ childregs->cp0_status &= ~(ST0_CU2|ST0_CU1); -#ifdef CONFIG_MIPS_MT_SMTC - /* - * SMTC restores TCStatus after Status, and the CU bits - * are aliased there. - */ - childregs->cp0_tcstatus &= ~(ST0_CU2|ST0_CU1); -#endif clear_tsk_thread_flag(p, TIF_USEDFPU); #ifdef CONFIG_MIPS_MT_FPAFF @@ -161,7 +155,13 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, /* Fill in the fpu structure for a core dump.. */ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *r) { - memcpy(r, ¤t->thread.fpu, sizeof(current->thread.fpu)); + int i; + + for (i = 0; i < NUM_FPU_REGS; i++) + memcpy(&r[i], ¤t->thread.fpu.fpr[i], sizeof(*r)); + + memcpy(&r[NUM_FPU_REGS], ¤t->thread.fpu.fcr31, + sizeof(current->thread.fpu.fcr31)); return 1; } @@ -196,14 +196,23 @@ int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs) int dump_task_fpu(struct task_struct *t, elf_fpregset_t *fpr) { - memcpy(fpr, &t->thread.fpu, sizeof(current->thread.fpu)); + int i; + + for (i = 0; i < NUM_FPU_REGS; i++) + memcpy(&fpr[i], &t->thread.fpu.fpr[i], sizeof(*fpr)); + + memcpy(&fpr[NUM_FPU_REGS], &t->thread.fpu.fcr31, + sizeof(t->thread.fpu.fcr31)); return 1; } -/* - * - */ +#ifdef CONFIG_CC_STACKPROTECTOR +#include <linux/stackprotector.h> +unsigned long __stack_chk_guard __read_mostly; +EXPORT_SYMBOL(__stack_chk_guard); +#endif + struct mips_frame_info { void *func; unsigned long func_size; |