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[binutils-gdb] Check whether kernel supports PTRACE_GETREGSET
- From: Yao Qi <qiyao at sourceware dot org>
- To: gdb-cvs at sourceware dot org
- Date: 1 Jun 2015 11:17:33 -0000
- Subject: [binutils-gdb] Check whether kernel supports PTRACE_GETREGSET
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=7efe48d196f3fb6f55fc53b8021a410848c0a677
commit 7efe48d196f3fb6f55fc53b8021a410848c0a677
Author: Yao Qi <yao.qi@linaro.org>
Date: Mon Jun 1 12:13:02 2015 +0100
Check whether kernel supports PTRACE_GETREGSET
gdb:
2015-06-01 Yao Qi <yao.qi@linaro.org>
* arm-linux-nat.c (arm_linux_read_description): Check whether
kernel supports PTRACE_GETREGSET.
Diff:
---
gdb/ChangeLog | 5 +++++
gdb/arm-linux-nat.c | 16 ++++++++++++++++
2 files changed, 21 insertions(+)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 2ed122d..27b8438 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
2015-06-01 Yao Qi <yao.qi@linaro.org>
+ * arm-linux-nat.c (arm_linux_read_description): Check whether
+ kernel supports PTRACE_GETREGSET.
+
+2015-06-01 Yao Qi <yao.qi@linaro.org>
+
* x86-linux-nat.c (have_ptrace_getregset): Move it to ...
* linux-nat.c: ... here.
* x86-linux-nat.h (have_ptrace_getregset): Move the declaration
diff --git a/gdb/arm-linux-nat.c b/gdb/arm-linux-nat.c
index 7352841..877559e 100644
--- a/gdb/arm-linux-nat.c
+++ b/gdb/arm-linux-nat.c
@@ -634,6 +634,22 @@ arm_linux_read_description (struct target_ops *ops)
{
CORE_ADDR arm_hwcap = 0;
+ if (have_ptrace_getregset == -1)
+ {
+ elf_gregset_t gpregs;
+ struct iovec iov;
+ int tid = GET_THREAD_ID (inferior_ptid);
+
+ iov.iov_base = &gpregs;
+ iov.iov_len = sizeof (gpregs);
+
+ /* Check if PTRACE_GETREGSET works. */
+ if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iov) < 0)
+ have_ptrace_getregset = 0;
+ else
+ have_ptrace_getregset = 1;
+ }
+
if (target_auxv_search (ops, AT_HWCAP, &arm_hwcap) != 1)
{
return ops->beneath->to_read_description (ops->beneath);