diff options
| author | Kanoj Sarcar <kanoj@engr.sgi.com> | 2000-05-11 20:59:13 +0000 |
|---|---|---|
| committer | Kanoj Sarcar <kanoj@engr.sgi.com> | 2000-05-11 20:59:13 +0000 |
| commit | e3b4abcb9607063735ea134eca6fad62f8147f20 (patch) | |
| tree | 3cb2e5fa1795bfc2b2df6b0e72ce4b39e44f4ae0 /arch/mips64/kernel/ptrace.c | |
| parent | aed9bea016318b0f4cd8b3ac9aae9cb0f78526ef (diff) | |
SMP FPU management: similar to what sparc does, no lazy fpu context
switching in SMP mode, use PF_USEDFPU to determine whether a program
used the fpu in the last time quantum and so needs the fpu context
to be saved during context switch.
Diffstat (limited to 'arch/mips64/kernel/ptrace.c')
| -rw-r--r-- | arch/mips64/kernel/ptrace.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/mips64/kernel/ptrace.c b/arch/mips64/kernel/ptrace.c index 0301a66a3..b79a61f0e 100644 --- a/arch/mips64/kernel/ptrace.c +++ b/arch/mips64/kernel/ptrace.c @@ -13,6 +13,7 @@ * At this time Linux/MIPS64 only supports syscall tracing, even for 32-bit * binaries. */ +#include <linux/config.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/mm.h> @@ -36,7 +37,6 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data) struct task_struct *child; unsigned long flags; int ret; - extern void save_fp(void*); lock_kernel(); #if 0 @@ -132,12 +132,14 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data) break; case FPR_BASE ... FPR_BASE + 31: if (child->used_math) { +#ifndef CONFIG_SMP if (last_task_used_math == child) { set_cp0_status(ST0_CU1, ST0_CU1); save_fp(child); set_cp0_status(ST0_CU1, 0); last_task_used_math = NULL; } +#endif tmp = child->thread.fpu.hard.fp_regs[addr - 32]; } else { tmp = -EIO; @@ -199,6 +201,7 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data) case FPR_BASE ... FPR_BASE + 31: { unsigned long *fregs; if (child->used_math) { +#ifndef CONFIG_SMP if (last_task_used_math == child) { set_cp0_status(ST0_CU1, ST0_CU1); save_fp(child); @@ -206,6 +209,7 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data) last_task_used_math = NULL; regs->cp0_status &= ~ST0_CU1; } +#endif } else { /* FP not yet used */ memset(&child->thread.fpu.hard, ~0, @@ -293,7 +297,6 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data) struct task_struct *child; unsigned long flags; int ret; - extern void save_fp(void*); lock_kernel(); #if 0 @@ -389,12 +392,14 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data) break; case FPR_BASE ... FPR_BASE + 31: if (child->used_math) { +#ifndef CONFIG_SMP if (last_task_used_math == child) { set_cp0_status(ST0_CU1, ST0_CU1); save_fp(child); set_cp0_status(ST0_CU1, 0); last_task_used_math = NULL; } +#endif tmp = child->thread.fpu.hard.fp_regs[addr - 32]; } else { tmp = -EIO; @@ -456,6 +461,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data) case FPR_BASE ... FPR_BASE + 31: { unsigned long *fregs; if (child->used_math) { +#ifndef CONFIG_SMP if (last_task_used_math == child) { set_cp0_status(ST0_CU1, ST0_CU1); save_fp(child); @@ -463,6 +469,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data) last_task_used_math = NULL; regs->cp0_status &= ~ST0_CU1; } +#endif } else { /* FP not yet used */ memset(&child->thread.fpu.hard, ~0, |