diff options
Diffstat (limited to 'gdb/amd64-linux-nat.c')
| -rw-r--r-- | gdb/amd64-linux-nat.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/gdb/amd64-linux-nat.c b/gdb/amd64-linux-nat.c index aa9295d..823c1f7 100644 --- a/gdb/amd64-linux-nat.c +++ b/gdb/amd64-linux-nat.c @@ -235,22 +235,21 @@ amd64_linux_nat_target::fetch_registers (struct regcache *regcache, int regnum) if (have_ptrace_getregset == TRIBOOL_TRUE) { - char xstateregs[tdep->xsave_layout.sizeof_xsave]; - struct iovec iov; - /* Pre-4.14 kernels have a bug (fixed by commit 0852b374173b "x86/fpu: Add FPU state copying quirk to handle XRSTOR failure on Intel Skylake CPUs") that sometimes causes the mxcsr location in xstateregs not to be copied by PTRACE_GETREGSET. Make sure that the location is at least initialized with a defined value. */ - memset (xstateregs, 0, sizeof (xstateregs)); - iov.iov_base = xstateregs; - iov.iov_len = sizeof (xstateregs); + gdb::byte_vector xstateregs (tdep->xsave_layout.sizeof_xsave, 0); + struct iovec iov; + + iov.iov_base = xstateregs.data (); + iov.iov_len = xstateregs.size (); if (ptrace (PTRACE_GETREGSET, tid, (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) perror_with_name (_("Couldn't get extended state status")); - amd64_supply_xsave (regcache, -1, xstateregs); + amd64_supply_xsave (regcache, -1, xstateregs.data ()); } else { @@ -300,16 +299,16 @@ amd64_linux_nat_target::store_registers (struct regcache *regcache, int regnum) if (have_ptrace_getregset == TRIBOOL_TRUE) { - char xstateregs[tdep->xsave_layout.sizeof_xsave]; + gdb::byte_vector xstateregs (tdep->xsave_layout.sizeof_xsave); struct iovec iov; - iov.iov_base = xstateregs; - iov.iov_len = sizeof (xstateregs); + iov.iov_base = xstateregs.data (); + iov.iov_len = xstateregs.size (); if (ptrace (PTRACE_GETREGSET, tid, (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) perror_with_name (_("Couldn't get extended state status")); - amd64_collect_xsave (regcache, regnum, xstateregs, 0); + amd64_collect_xsave (regcache, regnum, xstateregs.data (), 0); if (ptrace (PTRACE_SETREGSET, tid, (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) |