diff options
Diffstat (limited to 'gdb/ia64-linux-tdep.c')
| -rw-r--r-- | gdb/ia64-linux-tdep.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gdb/ia64-linux-tdep.c b/gdb/ia64-linux-tdep.c index 12f0c18c112..c3fa443a365 100644 --- a/gdb/ia64-linux-tdep.c +++ b/gdb/ia64-linux-tdep.c @@ -23,6 +23,7 @@ #include "ia64-tdep.h" #include "arch-utils.h" #include "gdbcore.h" +#include "regcache.h" /* The sigtramp code is in a non-readable (executable-only) region of memory called the ``gate page''. The addresses in question @@ -94,3 +95,20 @@ ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno) return 0; } } + +void +ia64_linux_write_pc (CORE_ADDR pc, ptid_t ptid) +{ + ia64_write_pc (pc, ptid); + + /* We must be careful with modifying the instruction-pointer: if we + just interrupt a system call, the kernel would ordinarily try to + restart it when we resume the inferior, which typically results + in SIGSEGV or SIGILL. We prevent this by clearing r10, which + will tell the kernel that r8 does NOT contain a valid error code + and hence it will skip system-call restart. + + The clearing of r10 is safe as long as ia64_write_pc() is only + called as part of setting up an inferior call. */ + write_register_pid (IA64_GR10_REGNUM, 0, ptid); +} |