diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha/getcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/alpha/getcontext.S | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/getcontext.S b/sysdeps/unix/sysv/linux/alpha/getcontext.S new file mode 100644 index 0000000000..eb1046a290 --- /dev/null +++ b/sysdeps/unix/sysv/linux/alpha/getcontext.S @@ -0,0 +1,187 @@ +/* Save current context. + Copyright (C) 2004-2014 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <ucontext-offsets.h> + +/* ??? Should be a better place for this that's asm friendly. */ +#define SIG_BLOCK 1 + + +ENTRY (__getcontext) +#ifdef PROF + ldgp gp, 0(pv) + .set noat + lda AT, _mcount + jsr AT, (AT), _mcount + .set at + .prologue 1 +#else + .prologue 0 +#endif + + bsr $0, __getcontext_x + mov $31, $0 + ret + +END(__getcontext) +weak_alias (__getcontext, getcontext) + + +/* An internal routine used by getcontext and setcontext. + The incomming return address register is $0. */ + + .align 4 + .globl __getcontext_x + .hidden __getcontext_x + .usepv __getcontext_x, no + + cfi_startproc + cfi_return_column (64) +__getcontext_x: + cfi_register (64, 0) + + .set noat + + /* Return value of getcontext. $0 is the only register + whose value is not preserved. */ + stq $31, UC_SIGCTX+SC_REGS($16) + + /* Store all registers into the context. */ + stq $1, UC_SIGCTX+SC_REGS+1*8($16) + stq $2, UC_SIGCTX+SC_REGS+2*8($16) + stq $3, UC_SIGCTX+SC_REGS+3*8($16) + stq $4, UC_SIGCTX+SC_REGS+4*8($16) + stq $5, UC_SIGCTX+SC_REGS+5*8($16) + stq $6, UC_SIGCTX+SC_REGS+6*8($16) + stq $7, UC_SIGCTX+SC_REGS+7*8($16) + stq $8, UC_SIGCTX+SC_REGS+8*8($16) + stq $9, UC_SIGCTX+SC_REGS+9*8($16) + stq $10, UC_SIGCTX+SC_REGS+10*8($16) + stq $11, UC_SIGCTX+SC_REGS+11*8($16) + stq $12, UC_SIGCTX+SC_REGS+12*8($16) + stq $13, UC_SIGCTX+SC_REGS+13*8($16) + stq $14, UC_SIGCTX+SC_REGS+14*8($16) + stq $15, UC_SIGCTX+SC_REGS+15*8($16) + stq $16, UC_SIGCTX+SC_REGS+16*8($16) + stq $17, UC_SIGCTX+SC_REGS+17*8($16) + stq $18, UC_SIGCTX+SC_REGS+18*8($16) + stq $19, UC_SIGCTX+SC_REGS+19*8($16) + stq $20, UC_SIGCTX+SC_REGS+20*8($16) + stq $21, UC_SIGCTX+SC_REGS+21*8($16) + stq $22, UC_SIGCTX+SC_REGS+22*8($16) + stq $23, UC_SIGCTX+SC_REGS+23*8($16) + stq $24, UC_SIGCTX+SC_REGS+24*8($16) + stq $25, UC_SIGCTX+SC_REGS+25*8($16) + stq $26, UC_SIGCTX+SC_REGS+26*8($16) + stq $27, UC_SIGCTX+SC_REGS+27*8($16) + stq $28, UC_SIGCTX+SC_REGS+28*8($16) + stq $29, UC_SIGCTX+SC_REGS+29*8($16) + stq $30, UC_SIGCTX+SC_REGS+30*8($16) + stq $31, UC_SIGCTX+SC_REGS+31*8($16) + + stt $f0, UC_SIGCTX+SC_FPREGS+0*8($16) + stt $f1, UC_SIGCTX+SC_FPREGS+1*8($16) + stt $f2, UC_SIGCTX+SC_FPREGS+2*8($16) + stt $f3, UC_SIGCTX+SC_FPREGS+3*8($16) + stt $f4, UC_SIGCTX+SC_FPREGS+4*8($16) + stt $f5, UC_SIGCTX+SC_FPREGS+5*8($16) + stt $f6, UC_SIGCTX+SC_FPREGS+6*8($16) + stt $f7, UC_SIGCTX+SC_FPREGS+7*8($16) + stt $f8, UC_SIGCTX+SC_FPREGS+8*8($16) + stt $f9, UC_SIGCTX+SC_FPREGS+9*8($16) + stt $f10, UC_SIGCTX+SC_FPREGS+10*8($16) + stt $f11, UC_SIGCTX+SC_FPREGS+11*8($16) + stt $f12, UC_SIGCTX+SC_FPREGS+12*8($16) + stt $f13, UC_SIGCTX+SC_FPREGS+13*8($16) + stt $f14, UC_SIGCTX+SC_FPREGS+14*8($16) + stt $f15, UC_SIGCTX+SC_FPREGS+15*8($16) + stt $f16, UC_SIGCTX+SC_FPREGS+16*8($16) + stt $f17, UC_SIGCTX+SC_FPREGS+17*8($16) + stt $f18, UC_SIGCTX+SC_FPREGS+18*8($16) + stt $f19, UC_SIGCTX+SC_FPREGS+19*8($16) + stt $f20, UC_SIGCTX+SC_FPREGS+20*8($16) + stt $f21, UC_SIGCTX+SC_FPREGS+21*8($16) + stt $f22, UC_SIGCTX+SC_FPREGS+22*8($16) + stt $f23, UC_SIGCTX+SC_FPREGS+23*8($16) + stt $f24, UC_SIGCTX+SC_FPREGS+24*8($16) + stt $f25, UC_SIGCTX+SC_FPREGS+25*8($16) + stt $f26, UC_SIGCTX+SC_FPREGS+26*8($16) + stt $f27, UC_SIGCTX+SC_FPREGS+27*8($16) + stt $f28, UC_SIGCTX+SC_FPREGS+28*8($16) + stt $f29, UC_SIGCTX+SC_FPREGS+29*8($16) + stt $f30, UC_SIGCTX+SC_FPREGS+30*8($16) + stt $f31, UC_SIGCTX+SC_FPREGS+31*8($16) + + mf_fpcr $f0 + lda $1, 8 + stt $f0, UC_SIGCTX+SC_FPCR($16) + + /* The return address of getcontext is the restart pc. */ + stq $26, UC_SIGCTX+SC_PC($16) + + /* Userlevel always has a processor status word of 8. */ + stq $1, UC_SIGCTX+SC_PS($16) + + /* Save registers around the syscall. We preserve $17 + for the benefit of swapcontext. */ + subq $30, 4*8, $30 + cfi_adjust_cfa_offset(4*8) + stq $0, 0($30) + cfi_rel_offset(64, 0) + stq $16, 8($30) + stq $17, 16($30) + + /* Save the current signal mask. Whee, there are three + copies of this in the alpha ucontext_t. */ + lda $16, SIG_BLOCK + lda $17, 0 + lda $0, __NR_osf_sigprocmask + callsys + + ldq $16, 8($30) + ldq $17, 16($30) + + stq $0, UC_OSF_SIGMASK($16) + stq $0, UC_SIGCTX+SC_MASK($16) + stq $0, UC_SIGMASK($16) + stq $31, UC_SIGMASK + 1*8($16) + stq $31, UC_SIGMASK + 2*8($16) + stq $31, UC_SIGMASK + 3*8($16) + stq $31, UC_SIGMASK + 4*8($16) + stq $31, UC_SIGMASK + 5*8($16) + stq $31, UC_SIGMASK + 6*8($16) + stq $31, UC_SIGMASK + 7*8($16) + stq $31, UC_SIGMASK + 8*8($16) + stq $31, UC_SIGMASK + 9*8($16) + stq $31, UC_SIGMASK +10*8($16) + stq $31, UC_SIGMASK +11*8($16) + stq $31, UC_SIGMASK +12*8($16) + stq $31, UC_SIGMASK +13*8($16) + stq $31, UC_SIGMASK +14*8($16) + stq $31, UC_SIGMASK +15*8($16) + + ldq $0, 0($30) + addq $30, 4*8, $30 + cfi_register (64, 0) + cfi_adjust_cfa_offset(-4*8) + ret $31, ($0), 1 + + cfi_endproc + .size __getcontext_x, .-__getcontext_x + .type __getcontext_x, @function |