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author | Chris Metcalf <cmetcalf@tilera.com> | 2014-02-10 10:54:47 -0500 |
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committer | Chris Metcalf <cmetcalf@tilera.com> | 2014-02-10 11:04:39 -0500 |
commit | 4372980f5881e7d537a52e3c49588ce116088061 (patch) | |
tree | 138fbc88313c8cb0cabee393e0c08afd67dac6f1 /sysdeps/unix/sysv/linux/tile/swapcontext.S | |
parent | a1ffb40e32741f992c743e7b16c061fefa3747ac (diff) | |
download | glibc-4372980f5881e7d537a52e3c49588ce116088061.tar.gz glibc-4372980f5881e7d537a52e3c49588ce116088061.tar.xz glibc-4372980f5881e7d537a52e3c49588ce116088061.zip |
Move tilegx, tilepro, and linux-generic from ports to libc.
I've moved the TILE-Gx and TILEPro ports to the main sysdeps hierarchy, along with the linux-generic ports infrastructure. Beyond the README update, the move was just git mv ports/sysdeps/tile sysdeps/tile git mv ports/sysdeps/unix/sysv/linux/tile \ sysdeps/unix/sysv/linux/tile git mv ports/sysdeps/unix/sysv/linux/generic \ sysdeps/unix/sysv/linux/generic I updated the relevant ChangeLogs along the lines of the ARM move in commit c6bfe5c4d75 and tested the 64-bit tilegx build to confirm that there were no changes in "objdump -dr" output in the shared objects.
Diffstat (limited to 'sysdeps/unix/sysv/linux/tile/swapcontext.S')
-rw-r--r-- | sysdeps/unix/sysv/linux/tile/swapcontext.S | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/tile/swapcontext.S b/sysdeps/unix/sysv/linux/tile/swapcontext.S new file mode 100644 index 0000000000..ef24e39898 --- /dev/null +++ b/sysdeps/unix/sysv/linux/tile/swapcontext.S @@ -0,0 +1,89 @@ +/* Copyright (C) 2011-2014 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 "ucontext_i.h" + +/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */ + + .text +ENTRY (__swapcontext) + FEEDBACK_ENTER(__swapcontext) + /* Set up a frame and save r0 and r1. */ + { + ST sp, lr + ADDI_PTR r11, sp, -(3 * REGSIZE) + move r10, sp + } + ADDI_PTR sp, sp, -(4 * REGSIZE) + cfi_def_cfa_offset (4 * REGSIZE) + cfi_offset (lr, 0) + { + ST r11, r10 + ADDI_PTR r10, sp, (2 * REGSIZE) + } + { + ST r10, r0 + ADDI_PTR r10, sp, (3 * REGSIZE) + } + ST r10, r1 + + /* Save the current context. */ + jal __getcontext + + /* Tear down the frame and restore r0, r1, and lr. */ + { + BNEZ r0, .Lerror + ADDI_PTR r1, sp, 3 * REGSIZE + } + { + LD r1, r1 + ADDI_PTR r0, sp, 2 * REGSIZE + } + { + LD r0, r0 + ADDI_PTR sp, sp, 4 * REGSIZE + } + cfi_def_cfa_offset (0) + { + LD lr, sp + ADDLI_PTR r10, r0, UC_REG(54) + } + + /* Update the stored sp and lr. */ + { + ST r10, sp + ADDLI_PTR r10, r0, UC_REG(55) + } + ST r10, lr + + /* Tail-call setcontext to finish up. */ + { + move r0, r1 + j __setcontext + } + +.Lerror: + ADDI_PTR sp, sp, 4 * REGSIZE + cfi_def_cfa_offset (0) + LD lr, sp + jrp lr +END (__swapcontext) + +weak_alias (__swapcontext, swapcontext) |