diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha/rt_sigaction.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/alpha/rt_sigaction.S | 91 |
1 files changed, 64 insertions, 27 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S b/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S index 5f166a7094..3e02a661e7 100644 --- a/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S +++ b/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S @@ -1,4 +1,4 @@ -/* Copyright (C) 1998 Free Software Foundation, Inc. +/* Copyright (C) 1998, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson <rth@cygnus.com>, 1998 @@ -28,55 +28,92 @@ #ifdef __NR_rt_sigaction .text + ENTRY(__syscall_rt_sigaction) .frame sp,0,ra,0 -#ifdef PROF ldgp gp,0(pv) +#ifdef PROF .set noat lda AT, _mcount jsr AT, (AT), _mcount .set at #endif - /* Indicate non-standard use of our PV. */ - .prologue 2 + .prologue 1 beq a1, 0f - ldl t0, 8(a1) # sa_flags - lda a4, sigreturn-__syscall_rt_sigaction(pv) - lda t1, rt_sigreturn-__syscall_rt_sigaction(pv) - and t0, 0x00000040, t0 # SA_SIGINFO + ldl t0, 8(a1) # sa_flags + ldah a4, sigreturn(gp) !gprelhigh + ldah t1, rt_sigreturn(gp) !gprelhigh + lda a4, sigreturn(a4) !gprellow + lda t1, rt_sigreturn(a4) !gprellow + and t0, 0x00000040, t0 # SA_SIGINFO cmovne t0, t1, a4 -0: ldi v0,__NR_rt_sigaction +0: ldi v0, __NR_rt_sigaction callsys - bne a3,1f + bne a3, SYSCALL_ERROR_LABEL ret -1: -#ifndef PROF - br gp,2f -2: ldgp gp,0(gp) -#endif - SYSCALL_ERROR_HANDLER +PSEUDO_END(__syscall_rt_sigaction) -END(__syscall_rt_sigaction) +/* To enable unwinding through the signal frame without special hackery + elsewhere, describe the entire struct sigcontext with unwind info. + Note that we begin the unwind info one instruction before the start + of the function; the unwinder will subtract one from the return address + attempting to find the call instruction that led us here, since we + didn't get here via a normal call. */ + + .macro SIGCONTEXT_REGS_I base, from=0 + cfi_offset (\from, \base + (4 + \from) * 8) + .if 30-\from + SIGCONTEXT_REGS_I \base, "(\from+1)" + .endif + .endm - .align 5 - .ent sigreturn + .macro SIGCONTEXT_REGS_F base, from=32 + cfi_offset (\from, \base + (4 + 1 + \from) * 8) + .if 62-\from + SIGCONTEXT_REGS_F \base, "(\from+1)" + .endif + .endm + + .macro SIGCONTEXT_REGS base + SIGCONTEXT_REGS_I \base + SIGCONTEXT_REGS_F \base + cfi_offset (63, \base + (4 + 32 + 1 + 32) * 8) + cfi_offset (64, \base + 2 * 8) + .endm + + .align 4 + nop + nop + nop + + cfi_startproc + cfi_return_column (64) + SIGCONTEXT_REGS -648 + cfi_def_cfa_offset (648) + nop sigreturn: - .prologue 0 - mov sp,a0 - ldi v0,__NR_sigreturn + mov sp, a0 + ldi v0, __NR_sigreturn callsys - .end sigreturn + cfi_endproc + .size sigreturn, .-sigreturn + .type sigreturn, @function - .align 4 - .ent rt_sigreturn + cfi_startproc + cfi_return_column (64) + SIGCONTEXT_REGS -648 + cfi_def_cfa_offset (176 + 648) + nop rt_sigreturn: - .prologue 0 mov sp,a0 ldi v0,__NR_rt_sigreturn callsys - .end rt_sigreturn + cfi_endproc + .size rt_sigreturn, .-rt_sigreturn + .type rt_sigreturn, @function + #else ENTRY(__syscall_rt_sigaction) ldgp $29,0($27) |