mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 07:20:11 +00:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
207 lines
5.6 KiB
ArmAsm
207 lines
5.6 KiB
ArmAsm
/* 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
|