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NPTL, round one.

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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2005-04-13 17:43:59 +00:00
parent 38551576a3
commit 3c37026d43
14 changed files with 129 additions and 14 deletions
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1
arch/mips/kernel/asm-offsets.c
View File

@ -95,6 +95,7 @@ void output_thread_info_defines(void)
offset("#define TI_PRE_COUNT ", struct thread_info, preempt_count);
offset("#define TI_ADDR_LIMIT ", struct thread_info, addr_limit);
offset("#define TI_RESTART_BLOCK ", struct thread_info, restart_block);
offset("#define TI_TP_VALUE ", struct thread_info, tp_value);
constant("#define _THREAD_SIZE_ORDER ", THREAD_SIZE_ORDER);
constant("#define _THREAD_SIZE ", THREAD_SIZE);
constant("#define _THREAD_MASK ", THREAD_MASK);

27
arch/mips/kernel/linux32.c
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@ -1468,3 +1468,30 @@ sysn32_rt_sigtimedwait(const sigset_t __user *uthese,
}
return sys_rt_sigtimedwait(uthese, uinfo, uts, sigsetsize);
}
save_static_function(sys32_clone);
__attribute_used__ noinline static int
_sys32_clone(nabi_no_regargs struct pt_regs regs)
{
unsigned long clone_flags;
unsigned long newsp;
int __user *parent_tidptr, *child_tidptr;
clone_flags = regs.regs[4];
newsp = regs.regs[5];
if (!newsp)
newsp = regs.regs[29];
parent_tidptr = (int *) regs.regs[6];
/* Use __dummy4 instead of getting it off the stack, so that
syscall() works. */
child_tidptr = (int __user *) __dummy4;
return do_fork(clone_flags, newsp, &regs, 0,
parent_tidptr, child_tidptr);
}
extern asmlinkage void sys_set_thread_area(u32 addr);
asmlinkage void sys32_set_thread_area(u32 addr)
{
sys_set_thread_area(AA(addr));
}

4
arch/mips/kernel/process.c
View File

@ -89,6 +89,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
struct thread_info *ti = p->thread_info;
struct pt_regs *childregs;
long childksp;
p->set_child_tid = p->clear_child_tid = NULL;
childksp = (unsigned long)ti + THREAD_SIZE - 32;
@ -134,6 +135,9 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
childregs->cp0_status &= ~(ST0_CU2|ST0_CU1);
clear_tsk_thread_flag(p, TIF_USEDFPU);
if (clone_flags & CLONE_SETTLS)
ti->tp_value = regs->regs[7];
return 0;
}

5
arch/mips/kernel/ptrace.c
View File

@ -289,6 +289,11 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
ret = ptrace_detach(child, data);
break;
case PTRACE_GET_THREAD_AREA:
ret = put_user(child->thread_info->tp_value,
(unsigned long __user *) data);
break;
default:
ret = ptrace_request(child, request, addr, data);
break;

5
arch/mips/kernel/ptrace32.c
View File

@ -268,6 +268,11 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
wake_up_process(child);
break;
case PTRACE_GET_THREAD_AREA:
ret = put_user(child->thread_info->tp_value,
(unsigned int __user *) (unsigned long) data);
break;
case PTRACE_DETACH: /* detach a process that was attached. */
ret = ptrace_detach(child, data);
break;

1
arch/mips/kernel/scall32-o32.S
View File

@ -623,6 +623,7 @@ einval: li v0, -EINVAL
sys sys_add_key 5
sys sys_request_key 4
sys sys_keyctl 5
sys sys_set_thread_area 1
.endm

1
arch/mips/kernel/scall64-64.S
View File

@ -449,3 +449,4 @@ sys_call_table:
PTR sys_add_key
PTR sys_request_key /* 5240 */
PTR sys_keyctl
PTR sys_set_thread_area

1
arch/mips/kernel/scall64-n32.S
View File

@ -363,3 +363,4 @@ EXPORT(sysn32_call_table)
PTR sys_add_key
PTR sys_request_key
PTR sys_keyctl /* 6245 */
PTR sys_set_thread_area

3
arch/mips/kernel/scall64-o32.S
View File

@ -322,7 +322,7 @@ sys_call_table:
PTR sys32_ipc
PTR sys_fsync
PTR sys32_sigreturn
PTR sys_clone /* 4120 */
PTR sys32_clone /* 4120 */
PTR sys_setdomainname
PTR sys32_newuname
PTR sys_ni_syscall /* sys_modify_ldt */
@ -485,4 +485,5 @@ sys_call_table:
PTR sys_add_key /* 4280 */
PTR sys_request_key
PTR sys_keyctl
PTR sys_set_thread_area
.size sys_call_table,.-sys_call_table

31
arch/mips/kernel/syscall.c
View File

@ -7,6 +7,7 @@
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
* Copyright (C) 2001 MIPS Technologies, Inc.
*/
#include <linux/config.h>
#include <linux/a.out.h>
#include <linux/errno.h>
#include <linux/linkage.h>
@ -176,14 +177,28 @@ _sys_clone(nabi_no_regargs struct pt_regs regs)
{
unsigned long clone_flags;
unsigned long newsp;
int *parent_tidptr, *child_tidptr;
int __user *parent_tidptr, *child_tidptr;
clone_flags = regs.regs[4];
newsp = regs.regs[5];
if (!newsp)
newsp = regs.regs[29];
parent_tidptr = (int *) regs.regs[6];
child_tidptr = (int *) regs.regs[7];
parent_tidptr = (int __user *) regs.regs[6];
#ifdef CONFIG_32BIT
/* We need to fetch the fifth argument off the stack. */
child_tidptr = NULL;
if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) {
int __user *__user *usp = (int __user *__user *) regs.regs[29];
if (regs.regs[2] == __NR_syscall) {
if (get_user (child_tidptr, &usp[5]))
return -EFAULT;
}
else if (get_user (child_tidptr, &usp[4]))
return -EFAULT;
}
#else
child_tidptr = (int __user *) regs.regs[8];
#endif
return do_fork(clone_flags, newsp, &regs, 0,
parent_tidptr, child_tidptr);
}
@ -245,6 +260,16 @@ asmlinkage int sys_olduname(struct oldold_utsname * name)
return error;
}
void sys_set_thread_area(unsigned long addr)
{
struct thread_info *ti = current->thread_info;
ti->tp_value = addr;
/* If some future MIPS implementation has this register in hardware,
* we will need to update it here (and in context switches). */
}
asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
{
int tmp, len;

46
arch/mips/kernel/traps.c
View File

@ -360,6 +360,10 @@ static inline int get_insn_opcode(struct pt_regs *regs, unsigned int *opcode)
#define OFFSET 0x0000ffff
#define LL 0xc0000000
#define SC 0xe0000000
#define SPEC3 0x7c000000
#define RD 0x0000f800
#define FUNC 0x0000003f
#define RDHWR 0x0000003b
/*
* The ll_bit is cleared by r*_switch.S
@ -495,6 +499,37 @@ static inline int simulate_llsc(struct pt_regs *regs)
return -EFAULT; /* Strange things going on ... */
}
/*
* Simulate trapping 'rdhwr' instructions to provide user accessible
* registers not implemented in hardware. The only current use of this
* is the thread area pointer.
*/
static inline int simulate_rdhwr(struct pt_regs *regs)
{
struct thread_info *ti = current->thread_info;
unsigned int opcode;
if (unlikely(get_insn_opcode(regs, &opcode)))
return -EFAULT;
if (unlikely(compute_return_epc(regs)))
return -EFAULT;
if ((opcode & OPCODE) == SPEC3 && (opcode & FUNC) == RDHWR) {
int rd = (opcode & RD) >> 11;
int rt = (opcode & RT) >> 16;
switch (rd) {
case 29:
regs->regs[rt] = ti->tp_value;
break;
default:
return -EFAULT;
}
}
return 0;
}
asmlinkage void do_ov(struct pt_regs *regs)
{
siginfo_t info;
@ -641,6 +676,9 @@ asmlinkage void do_ri(struct pt_regs *regs)
if (!simulate_llsc(regs))
return;
if (!simulate_rdhwr(regs))
return;
force_sig(SIGILL, current);
}
@ -654,11 +692,13 @@ asmlinkage void do_cpu(struct pt_regs *regs)
switch (cpid) {
case 0:
if (cpu_has_llsc)
break;
if (!cpu_has_llsc)
if (!simulate_llsc(regs))
return;
if (!simulate_llsc(regs))
if (!simulate_rdhwr(regs))
return;
break;
case 1:

2
include/asm-mips/inst.h
View File

@ -28,7 +28,7 @@ enum major_op {
sdl_op, sdr_op, swr_op, cache_op,
ll_op, lwc1_op, lwc2_op, pref_op,
lld_op, ldc1_op, ldc2_op, ld_op,
sc_op, swc1_op, swc2_op, major_3b_op, /* Opcode 0x3b is unused */
sc_op, swc1_op, swc2_op, rdhwr_op,
scd_op, sdc1_op, sdc2_op, sd_op
};

1
include/asm-mips/thread_info.h
View File

@ -26,6 +26,7 @@ struct thread_info {
struct task_struct *task; /* main task structure */
struct exec_domain *exec_domain; /* execution domain */
unsigned long flags; /* low level flags */
unsigned long tp_value; /* thread pointer */
__u32 cpu; /* current CPU */
int preempt_count; /* 0 => preemptable, <0 => BUG */

15
include/asm-mips/unistd.h
View File

@ -303,16 +303,17 @@
#define __NR_add_key (__NR_Linux + 280)
#define __NR_request_key (__NR_Linux + 281)
#define __NR_keyctl (__NR_Linux + 282)
#define __NR_set_thread_area (__NR_Linux + 283)
/*
* Offset of the last Linux o32 flavoured syscall
*/
#define __NR_Linux_syscalls 282
#define __NR_Linux_syscalls 283
#endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */
#define __NR_O32_Linux 4000
#define __NR_O32_Linux_syscalls 282
#define __NR_O32_Linux_syscalls 283
#if _MIPS_SIM == _MIPS_SIM_ABI64
@ -562,16 +563,17 @@
#define __NR_add_key (__NR_Linux + 239)
#define __NR_request_key (__NR_Linux + 240)
#define __NR_keyctl (__NR_Linux + 241)
#define __NR_set_thread_area (__NR_Linux + 242)
/*
* Offset of the last Linux 64-bit flavoured syscall
*/
#define __NR_Linux_syscalls 241
#define __NR_Linux_syscalls 242
#endif /* _MIPS_SIM == _MIPS_SIM_ABI64 */
#define __NR_64_Linux 5000
#define __NR_64_Linux_syscalls 241
#define __NR_64_Linux_syscalls 242
#if _MIPS_SIM == _MIPS_SIM_NABI32
@ -825,16 +827,17 @@
#define __NR_add_key (__NR_Linux + 243)
#define __NR_request_key (__NR_Linux + 244)
#define __NR_keyctl (__NR_Linux + 245)
#define __NR_set_thread_area (__NR_Linux + 246)
/*
* Offset of the last N32 flavoured syscall
*/
#define __NR_Linux_syscalls 245
#define __NR_Linux_syscalls 246
#endif /* _MIPS_SIM == _MIPS_SIM_NABI32 */
#define __NR_N32_Linux 6000
#define __NR_N32_Linux_syscalls 245
#define __NR_N32_Linux_syscalls 246
#ifndef __ASSEMBLY__