Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=032d82d9065dec0e26718eca376c2029e4bd0595
Commit: 032d82d9065dec0e26718eca376c2029e4bd0595
Parent: 16c3e389e7a7254ff8dc7029ac4fbe996c3c75bf
Author: Roland McGrath <[EMAIL PROTECTED]>
AuthorDate: Wed Jan 30 13:31:47 2008 +0100
Committer: Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Wed Jan 30 13:31:47 2008 +0100
x86: compat_ptrace_request
This adds a compat_ptrace_request that is the analogue of ptrace_request
for the things that 32-on-64 ptrace implementations can share in common.
So far there are just a couple of requests handled generically.
Signed-off-by: Roland McGrath <[EMAIL PROTECTED]>
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
---
include/linux/compat.h | 4 ++++
kernel/ptrace.c | 38 ++++++++++++++++++++++++++++++++++++++
2 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/include/linux/compat.h b/include/linux/compat.h
index ba29d4c..a907fbe 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -243,6 +243,10 @@ asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
const compat_ulong_t __user *new_nodes);
+extern int compat_ptrace_request(struct task_struct *child,
+ compat_long_t request,
+ compat_ulong_t addr, compat_ulong_t data);
+
/*
* epoll (fs/eventpoll.c) compat bits follow ...
*/
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index e6a99d2..ed1c3d5 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -607,3 +607,41 @@ int generic_ptrace_pokedata(struct task_struct *tsk, long
addr, long data)
copied = access_process_vm(tsk, addr, &data, sizeof(data), 1);
return (copied == sizeof(data)) ? 0 : -EIO;
}
+
+#ifdef CONFIG_COMPAT
+#include <linux/compat.h>
+
+int compat_ptrace_request(struct task_struct *child, compat_long_t request,
+ compat_ulong_t addr, compat_ulong_t data)
+{
+ compat_ulong_t __user *datap = compat_ptr(data);
+ compat_ulong_t word;
+ int ret;
+
+ switch (request) {
+ case PTRACE_PEEKTEXT:
+ case PTRACE_PEEKDATA:
+ ret = access_process_vm(child, addr, &word, sizeof(word), 0);
+ if (ret != sizeof(word))
+ ret = -EIO;
+ else
+ ret = put_user(word, datap);
+ break;
+
+ case PTRACE_POKETEXT:
+ case PTRACE_POKEDATA:
+ ret = access_process_vm(child, addr, &data, sizeof(data), 1);
+ ret = (ret != sizeof(data) ? -EIO : 0);
+ break;
+
+ case PTRACE_GETEVENTMSG:
+ ret = put_user((compat_ulong_t) child->ptrace_message, datap);
+ break;
+
+ default:
+ ret = ptrace_request(child, request, addr, data);
+ }
+
+ return ret;
+}
+#endif /* CONFIG_COMPAT */
-
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