diff options
Diffstat (limited to 'gdb/gdbserver/linux-x86-low.c')
| -rw-r--r-- | gdb/gdbserver/linux-x86-low.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c index 0432a86..4a01750 100644 --- a/gdb/gdbserver/linux-x86-low.c +++ b/gdb/gdbserver/linux-x86-low.c @@ -1438,6 +1438,31 @@ x86_arch_setup (void) current_process ()->tdesc = x86_linux_read_description (); } +/* Fill *SYSNO and *SYSRET with the syscall nr trapped and the syscall return + code. This should only be called if LWP got a SYSCALL_SIGTRAP. */ + +static void +x86_get_syscall_trapinfo (struct regcache *regcache, int *sysno, int *sysret) +{ + int use_64bit = register_size (regcache->tdesc, 0) == 8; + + if (use_64bit) + { + long l_sysno; + long l_sysret; + + collect_register_by_name (regcache, "orig_rax", &l_sysno); + collect_register_by_name (regcache, "rax", &l_sysret); + *sysno = (int) l_sysno; + *sysret = (int) l_sysret; + } + else + { + collect_register_by_name (regcache, "orig_eax", sysno); + collect_register_by_name (regcache, "eax", sysret); + } +} + static int x86_supports_tracepoints (void) { @@ -3315,6 +3340,7 @@ struct linux_target_ops the_low_target = x86_supports_range_stepping, NULL, /* breakpoint_kind_from_current_state */ x86_supports_hardware_single_step, + x86_get_syscall_trapinfo, }; void |