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| author | Maxim Kuvyrkov <maxim@codesourcery.com> | 2009-12-06 10:08:14 -0800 |
|---|---|---|
| committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2010-02-27 18:35:22 +0100 |
| commit | a58f75349063f60949614de39390df594ba1418d (patch) | |
| tree | b0fec4508132df99cfa81e5d9f080028fe234b91 /arch/m68knommu/kernel | |
| parent | 9674cdc74d63f346870943ef966a034f8c71ee57 (diff) | |
| download | lwn-a58f75349063f60949614de39390df594ba1418d.tar.gz lwn-a58f75349063f60949614de39390df594ba1418d.zip | |
m68knommu: NPTL support for uClinux
Port syscalls for NPTL support to m68knommu.
Signed-off-by: Maxim Kuvyrkov <maxim@codesourcery.com>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68knommu/kernel')
| -rw-r--r-- | arch/m68knommu/kernel/process.c | 4 | ||||
| -rw-r--r-- | arch/m68knommu/kernel/ptrace.c | 5 | ||||
| -rw-r--r-- | arch/m68knommu/kernel/sys_m68k.c | 36 | ||||
| -rw-r--r-- | arch/m68knommu/kernel/syscalltable.S | 4 |
4 files changed, 49 insertions, 0 deletions
diff --git a/arch/m68knommu/kernel/process.c b/arch/m68knommu/kernel/process.c index 5c9ecd427090..959cb249c759 100644 --- a/arch/m68knommu/kernel/process.c +++ b/arch/m68knommu/kernel/process.c @@ -221,6 +221,10 @@ int copy_thread(unsigned long clone_flags, p->thread.usp = usp; p->thread.ksp = (unsigned long)childstack; + + if (clone_flags & CLONE_SETTLS) + task_thread_info(p)->tp_value = regs->d5; + /* * Must save the current SFC/DFC value, NOT the value when * the parent was last descheduled - RGH 10-08-96 diff --git a/arch/m68knommu/kernel/ptrace.c b/arch/m68knommu/kernel/ptrace.c index 4d3828959fb0..85ed2f988f98 100644 --- a/arch/m68knommu/kernel/ptrace.c +++ b/arch/m68knommu/kernel/ptrace.c @@ -319,6 +319,11 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) } #endif + case PTRACE_GET_THREAD_AREA: + ret = put_user(task_thread_info(child)->tp_value, + (unsigned long __user *)data); + break; + default: ret = -EIO; break; diff --git a/arch/m68knommu/kernel/sys_m68k.c b/arch/m68knommu/kernel/sys_m68k.c index b67cbc735a9b..923dd4aab875 100644 --- a/arch/m68knommu/kernel/sys_m68k.c +++ b/arch/m68knommu/kernel/sys_m68k.c @@ -190,3 +190,39 @@ int kernel_execve(const char *filename, char *const argv[], char *const envp[]) : "d" (__a), "d" (__b), "d" (__c)); return __res; } + +asmlinkage unsigned long sys_get_thread_area(void) +{ + return current_thread_info()->tp_value; +} + +asmlinkage int sys_set_thread_area(unsigned long tp) +{ + current_thread_info()->tp_value = tp; + return 0; +} + +/* This syscall gets its arguments in A0 (mem), D2 (oldval) and + D1 (newval). */ +asmlinkage int +sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5, + unsigned long __user * mem) +{ + struct mm_struct *mm = current->mm; + unsigned long mem_value; + + down_read(&mm->mmap_sem); + + mem_value = *mem; + if (mem_value == oldval) + *mem = newval; + + up_read(&mm->mmap_sem); + return mem_value; +} + +asmlinkage int sys_atomic_barrier(void) +{ + /* no code needed for uniprocs */ + return 0; +} diff --git a/arch/m68knommu/kernel/syscalltable.S b/arch/m68knommu/kernel/syscalltable.S index 486837efa3d7..56dd01ded148 100644 --- a/arch/m68knommu/kernel/syscalltable.S +++ b/arch/m68knommu/kernel/syscalltable.S @@ -351,6 +351,10 @@ ENTRY(sys_call_table) .long sys_pwritev /* 330 */ .long sys_rt_tgsigqueueinfo .long sys_perf_event_open + .long sys_get_thread_area + .long sys_set_thread_area + .long sys_atomic_cmpxchg_32 /* 335 */ + .long sys_atomic_barrier .rept NR_syscalls-(.-sys_call_table)/4 .long sys_ni_syscall |