static CORE_ADDR
alpha_linux_sigcontext_addr (struct frame_info *this_frame)
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
CORE_ADDR pc;
ULONGEST sp;
long off;
pc = get_frame_pc (this_frame);
sp = get_frame_register_unsigned (this_frame, ALPHA_SP_REGNUM);
off = alpha_linux_sigtramp_offset (gdbarch, pc);
gdb_assert (off >= 0);
/* __NR_rt_sigreturn has a couple of structures on the stack. This is:
struct rt_sigframe {
struct siginfo info;
struct ucontext uc;
};
offsetof (struct rt_sigframe, uc.uc_mcontext); */
if (alpha_read_insn (gdbarch, pc - off + 4) == 0x201f015f)
return sp + 176;
/* __NR_sigreturn has the sigcontext structure at the top of the stack. */
return sp;
}
static CORE_ADDR
alpha_linux_sigcontext_addr (struct frame_info *next_frame)
{
CORE_ADDR pc;
ULONGEST sp;
long off;
pc = frame_pc_unwind (next_frame);
frame_unwind_unsigned_register (next_frame, ALPHA_SP_REGNUM, &sp);
off = alpha_linux_sigtramp_offset (pc);
gdb_assert (off >= 0);
/* __NR_rt_sigreturn has a couple of structures on the stack. This is:
struct rt_sigframe {
struct siginfo info;
struct ucontext uc;
};
offsetof (struct rt_sigframe, uc.uc_mcontext);
*/
if (alpha_read_insn (pc - off + 4) == 0x201f015f)
return sp + 176;
/* __NR_sigreturn has the sigcontext structure at the top of the stack. */
return sp;
}
static int
alpha_linux_pc_in_sigtramp (struct gdbarch *gdbarch,
CORE_ADDR pc, char *func_name)
{
return alpha_linux_sigtramp_offset (gdbarch, pc) >= 0;
}
static int
alpha_linux_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
{
return alpha_linux_sigtramp_offset (pc) >= 0;
}