diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/tile/setcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/tile/setcontext.S | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/sysdeps/unix/sysv/linux/tile/setcontext.S b/sysdeps/unix/sysv/linux/tile/setcontext.S deleted file mode 100644 index efd4f5c..0000000 --- a/sysdeps/unix/sysv/linux/tile/setcontext.S +++ /dev/null @@ -1,206 +0,0 @@ -/* Copyright (C) 2011-2018 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. - - 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 <asm/errno.h> -#include <arch/spr_def.h> -#include <arch/abi.h> - -#include "ucontext_i.h" - -/* PL to return to via iret in setcontext */ -#define RETURN_PL 0 - -/* int setcontext (const ucontext_t *ucp) */ - - .text -ENTRY (__setcontext) - FEEDBACK_ENTER(__setcontext) - - /* See if this is a true signal context (flags == 0). - If so, restore by invoking rt_sigreturn(). */ -#if UC_FLAGS_OFFSET != 0 -# error "Add offset to r0 prior to load." -#endif - LD_PTR r10, r0 - { - beqz r10, .Lsigreturn - addi r10, r10, -1 /* Confirm that it has value "1". */ - } - bnez r10, .Lbadcontext - - /* Save lr and r0 briefly on the stack and set the signal mask: - rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, NULL, _NSIG / 8). */ - { - st sp, lr - ADDI_PTR r11, sp, -(2 * REGSIZE) - move r10, sp - } - ADDI_PTR sp, sp, -(3 * REGSIZE) - cfi_def_cfa_offset (3 * REGSIZE) - cfi_offset (lr, 0) - { - st r11, r10 - ADDI_PTR r10, sp, (2 * REGSIZE) - } - { - st r10, r0 - ADDLI_PTR r1, r0, UC_SIGMASK_OFFSET - } - cfi_offset (r0, -REGSIZE) - { - movei r3, _NSIG / 8 - movei r2, 0 - } - { - movei r0, SIG_SETMASK - moveli TREG_SYSCALL_NR_NAME, __NR_rt_sigprocmask - } - swint1 - ADDI_PTR r11, sp, 2 * REGSIZE /* Restore uc_context to r11. */ - { - ld r11, r11 - ADDI_PTR sp, sp, 3 * REGSIZE - } - cfi_def_cfa_offset (0) - ld lr, sp - { - ADDI_PTR r10, r11, UC_REG(0) - bnez r1, .Lsyscall_error - } - - /* Restore the argument registers; note they will be random - unless makecontext() has been called. */ - { ld r0, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r1, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r2, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r3, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r4, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r5, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r6, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r7, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r8, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r9, r10; ADDLI_PTR r10, r10, UC_REG(30) - UC_REG(9) } - - /* Restore the callee-saved GPRs. */ - { ld r30, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r31, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r32, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r33, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r34, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r35, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r36, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r37, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r38, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r39, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r40, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r41, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r42, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r43, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r44, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r45, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r46, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r47, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r48, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r49, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r50, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r51, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r52, r10; ADDI_PTR r10, r10, REGSIZE * 2 } - /* Skip tp since it must not change for a given thread. */ - { ld sp, r10; ADDI_PTR r10, r10, REGSIZE } - { ld lr, r10; ADDI_PTR r10, r10, REGSIZE } - { ld r11, r10; ADDI_PTR r10, r10, REGSIZE } - - /* Construct an iret context; we set ICS so we can validly load - EX_CONTEXT for iret without being interrupted halfway through. */ - { - ld r12, r10 - movei r13, 1 - } - { - mtspr INTERRUPT_CRITICAL_SECTION, r13 - shli r12, r12, SPR_EX_CONTEXT_0_1__ICS_SHIFT - } - { - mtspr EX_CONTEXT_0_0, r11 - ori r12, r12, RETURN_PL - } - mtspr EX_CONTEXT_0_1, r12 - iret - jrp lr /* keep the backtracer happy */ - -.Lsigreturn: - /* This is a context obtained from a signal handler. - Perform a full restore by pushing the context - passed onto a simulated signal frame on the stack - and call the signal return syscall as if a signal - handler exited normally. */ - { - ADDLI_PTR sp, sp, -(C_ABI_SAVE_AREA_SIZE + SI_MAX_SIZE + UC_SIZE) - ADDLI_PTR r1, sp, -UC_SIZE - } - cfi_def_cfa_offset (C_ABI_SAVE_AREA_SIZE + SI_MAX_SIZE + UC_SIZE) - moveli r2, UC_SIZE / REGSIZE -0: { - ld r10, r0 - ADDI_PTR r0, r0, REGSIZE - } - { - st r1, r10 - ADDI_PTR r1, r1, REGSIZE - addi r2, r2, -1 - } - bnez r2, 0b - moveli TREG_SYSCALL_NR_NAME, __NR_rt_sigreturn - swint1 - - /* Restore the stack and fall through to the error - path. Successful rt_sigreturn never returns to - its calling place. */ - ADDLI_PTR sp, sp, (C_ABI_SAVE_AREA_SIZE + SI_MAX_SIZE + UC_SIZE) - cfi_def_cfa_offset (0) - -.Lsyscall_error: - j SYSCALL_ERROR_NAME - -.Lbadcontext: - { - movei r1, EINVAL - j SYSCALL_ERROR_NAME - } - -END (__setcontext) - -.hidden __setcontext -weak_alias (__setcontext, setcontext) - -ENTRY (__startcontext) - cfi_undefined (lr) - FEEDBACK_ENTER(__startcontext) - jalr r31 - beqz r30, 1f - { - move r0, r30 - jal __setcontext - } -1: { - movei r0, 0 - j HIDDEN_JUMPTARGET(exit) - } -END (__startcontext) -.hidden __startcontext |