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author | Christoph Hellwig <hch@lst.de> | 2007-10-16 01:26:34 -0700 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:43:03 -0700 |
commit | a5f833f3c1961488733bf645b011b6350ee5c7be (patch) | |
tree | d7a8d03a5c29d7c820d8680d51f27c4edda9556a /arch/alpha/kernel/ptrace.c | |
parent | d9ff5f38727f839dacb2714154fa03e59803d7a5 (diff) | |
download | linux-stable-a5f833f3c1961488733bf645b011b6350ee5c7be.tar.gz linux-stable-a5f833f3c1961488733bf645b011b6350ee5c7be.tar.bz2 linux-stable-a5f833f3c1961488733bf645b011b6350ee5c7be.zip |
alpha: convert to generic sys_ptrace
This patch converts alpha to the generic sys_ptrace. We use
force_successful_syscall_return to avoid having to pass the pt_regs pointer
down to the function. I think the removal of the assemly stub is correct,
but I could only compile-test this patch, so please give it a spin before
commiting :)
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/alpha/kernel/ptrace.c')
-rw-r--r-- | arch/alpha/kernel/ptrace.c | 42 |
1 files changed, 6 insertions, 36 deletions
diff --git a/arch/alpha/kernel/ptrace.c b/arch/alpha/kernel/ptrace.c index eaf4ee5f0c35..1e9ad52c460e 100644 --- a/arch/alpha/kernel/ptrace.c +++ b/arch/alpha/kernel/ptrace.c @@ -260,38 +260,12 @@ void ptrace_disable(struct task_struct *child) ptrace_cancel_bpt(child); } -asmlinkage long -do_sys_ptrace(long request, long pid, long addr, long data, - struct pt_regs *regs) +long arch_ptrace(struct task_struct *child, long request, long addr, long data) { - struct task_struct *child; unsigned long tmp; size_t copied; long ret; - lock_kernel(); - DBG(DBG_MEM, ("request=%ld pid=%ld addr=0x%lx data=0x%lx\n", - request, pid, addr, data)); - if (request == PTRACE_TRACEME) { - ret = ptrace_traceme(); - goto out_notsk; - } - - child = ptrace_get_task_struct(pid); - if (IS_ERR(child)) { - ret = PTR_ERR(child); - goto out_notsk; - } - - if (request == PTRACE_ATTACH) { - ret = ptrace_attach(child); - goto out; - } - - ret = ptrace_check_attach(child, request == PTRACE_KILL); - if (ret < 0) - goto out; - switch (request) { /* When I and D space are separate, these will need to be fixed. */ case PTRACE_PEEKTEXT: /* read word at location addr. */ @@ -301,13 +275,13 @@ do_sys_ptrace(long request, long pid, long addr, long data, if (copied != sizeof(tmp)) break; - regs->r0 = 0; /* special return: no errors */ + force_successful_syscall_return(); ret = tmp; break; /* Read register number ADDR. */ case PTRACE_PEEKUSR: - regs->r0 = 0; /* special return: no errors */ + force_successful_syscall_return(); ret = get_reg(child, addr); DBG(DBG_MEM, ("peek $%ld->%#lx\n", addr, ret)); break; @@ -353,7 +327,7 @@ do_sys_ptrace(long request, long pid, long addr, long data, /* make sure single-step breakpoint is gone. */ ptrace_cancel_bpt(child); wake_up_process(child); - goto out; + break; case PTRACE_SINGLESTEP: /* execute single instruction. */ ret = -EIO; @@ -366,16 +340,12 @@ do_sys_ptrace(long request, long pid, long addr, long data, wake_up_process(child); /* give it a chance to run. */ ret = 0; - goto out; + break; default: ret = ptrace_request(child, request, addr, data); - goto out; + break; } - out: - put_task_struct(child); - out_notsk: - unlock_kernel(); return ret; } |