diff options
Diffstat (limited to 'gdb/amd64-linux-nat.c')
| -rw-r--r-- | gdb/amd64-linux-nat.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/gdb/amd64-linux-nat.c b/gdb/amd64-linux-nat.c index fa4afebbee1..545910dd0a3 100644 --- a/gdb/amd64-linux-nat.c +++ b/gdb/amd64-linux-nat.c @@ -286,14 +286,16 @@ amd64_linux_dr_get (ptid_t ptid, int regnum) { int tid; unsigned long value; + int offset; tid = ptid_get_lwp (ptid); if (tid == 0) tid = ptid_get_pid (ptid); errno = 0; - value = ptrace (PTRACE_PEEKUSER, tid, - offsetof (struct user, u_debugreg[regnum]), 0); + + offset = offsetof (struct user, u_debugreg) + sizeof (((struct user *)0)->u_debugreg[0]) * regnum; + value = ptrace (PTRACE_PEEKUSER, tid, offset, 0); if (errno != 0) perror_with_name (_("Couldn't read debug register")); @@ -306,14 +308,15 @@ static void amd64_linux_dr_set (ptid_t ptid, int regnum, unsigned long value) { int tid; + int offset; tid = ptid_get_lwp (ptid); if (tid == 0) tid = ptid_get_pid (ptid); errno = 0; - ptrace (PTRACE_POKEUSER, tid, - offsetof (struct user, u_debugreg[regnum]), value); + offset = offsetof (struct user, u_debugreg) + sizeof (((struct user *)0)->u_debugreg[0]) * regnum; + ptrace (PTRACE_POKEUSER, tid, offset, value); if (errno != 0) perror_with_name (_("Couldn't write debug register")); } |