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[PATCH/RFA] AMD64 nptl support
- From: Elena Zannoni <ezannoni at redhat dot com>
- To: gdb-patches at sources dot redhat dot com
- Date: Wed, 9 Jul 2003 10:41:34 -0400
- Subject: [PATCH/RFA] AMD64 nptl support
This is all it's needed on AMD64 to get NPTL to work. Of course you
need the perfect combination of glibc, glibc-kernheaders and kernel.
OK?
elena
2003-07-09 Elena Zannoni <ezannoni@redhat.com>
* x86-64-linux-nat.c (ps_get_thread_area): New function.
Index: x86-64-linux-nat.c
===================================================================
RCS file: /cvs/uberbaum/gdb/x86-64-linux-nat.c,v
retrieving revision 1.23
diff -u -p -r1.23 x86-64-linux-nat.c
--- x86-64-linux-nat.c 31 May 2003 18:00:04 -0000 1.23
+++ x86-64-linux-nat.c 9 Jul 2003 14:30:02 -0000
@@ -32,7 +32,17 @@
#include <sys/debugreg.h>
#include <sys/syscall.h>
#include <sys/procfs.h>
+#include <asm/prctl.h>
+/* FIXME ezannoni-2003-07-09: we need <sys/reg.h> to be included after
+ <asm/ptrace.h> because the latter redefines FS and GS for no apparent
+ reason, and those definitions don't match the ones that libpthread_db
+ uses, which come from <sys/reg.h>. */
+/* ezannoni-2003-07-09: I think this is fixed. The extraneous defs have
+ been removed from ptrace.h in the kernel. However, better safe than
+ sorry. */
+#include <asm/ptrace.h>
#include <sys/reg.h>
+#include "gdb_proc_service.h"
/* Prototypes for supply_gregset etc. */
#include "gregset.h"
@@ -332,3 +342,34 @@ x86_64_linux_dr_get_status (void)
{
return x86_64_linux_dr_get (DR_STATUS);
}
+
+extern ps_err_e
+ps_get_thread_area (const struct ps_prochandle *ph,
+ lwpid_t lwpid, int idx, void **base)
+{
+
+/* This definition comes from prctl.h, but some kernels may not have it. */
+#ifndef PTRACE_ARCH_PRCTL
+#define PTRACE_ARCH_PRCTL 30
+#endif
+
+ /* FIXME: ezannoni-2003-07-09 see comment above about include file order.
+ We could be getting bogus values for these two. */
+ gdb_assert (FS < ELF_NGREG);
+ gdb_assert (GS < ELF_NGREG);
+ switch (idx)
+ {
+ case FS:
+ if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0)
+ return PS_OK;
+ break;
+ case GS:
+ if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0)
+ return PS_OK;
+ break;
+ default: /* Should not happen. */
+ return PS_BADADDR;
+ }
+ return PS_ERR; /* ptrace failed. */
+}
+