From 7efe48d196f3fb6f55fc53b8021a410848c0a677 Mon Sep 17 00:00:00 2001 From: Yao Qi Date: Mon, 1 Jun 2015 12:13:02 +0100 Subject: [PATCH] Check whether kernel supports PTRACE_GETREGSET gdb: 2015-06-01 Yao Qi * arm-linux-nat.c (arm_linux_read_description): Check whether kernel supports PTRACE_GETREGSET. --- gdb/ChangeLog | 5 +++++ gdb/arm-linux-nat.c | 16 ++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 2ed122d506..27b84382bb 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,8 @@ +2015-06-01 Yao Qi + + * arm-linux-nat.c (arm_linux_read_description): Check whether + kernel supports PTRACE_GETREGSET. + 2015-06-01 Yao Qi * x86-linux-nat.c (have_ptrace_getregset): Move it to ... diff --git a/gdb/arm-linux-nat.c b/gdb/arm-linux-nat.c index 7352841f59..877559ed3e 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);