path: root/open_issues/glibc_ptrace.mdwn
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author <diana@web>2015-02-16 20:08:03 +0100
committerGNU Hurd web pages engine <>2015-02-16 20:08:03 +0100
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-[[!meta copyright="Copyright © 2009, 2012 Free Software Foundation, Inc."]]
-[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
-id="license" text="Permission is granted to copy, distribute and/or modify this
-document under the terms of the GNU Free Documentation License, Version 1.2 or
-any later version published by the Free Software Foundation; with no Invariant
-Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
-is included in the section entitled [[GNU Free Documentation
-[[!meta title="glibc: ptrace"]]
-[[!tag open_issue_glibc]]
-`ptrace` has some issues (`sysdeps/mach/hurd/ptrace.c`).
- * Our implementation (and the generic one in `misc/ptrace.c`) differ
- from the Linux one (`sysdeps/unix/sysv/linux/ptrace.c`)
- w.r.t. handling of...
- * the third argument: `int data` vs. `void *data`;
- * `void *addr2` -- Linux doesn't have this, but we provide some
- additional functionalty using this;
- * function declaration: Linux has **`long`** `int ptrace (enum
- __ptrace_request __request, ...)` **`__THROW`**, we have `int ptrace
- (enum __ptrace_request __request, ...)`;
- * interface do differ, e.g., Linux' `PTRACE_GETREGS` uses `void
- *data`, we use `void *addr` for returning the struct, and in
- Linux this is a `struct user_regs_struct` from `linux/user.h`,
- and for us it is a `struct i386_thread_state` from
- `mach/i386/thread_status.h`;
- * Linux provides some functionality that we don't provide:
- * Some parts are wrongly implemented, e.g., `PTRACE_GETREGS` and
- `PTRACE_SETREGS` both do the same thing.
-Also consider the `sysdeps/generic/sys/ptrace.h` and
-`sysdeps/unix/sysv/linux/sys/ptrace.h` files.