1/* libunwind - a platform-independent unwind library 2 Copyright (C) 2008 Google, Inc 3 Contributed by Paul Pluzhnikov <ppluzhnikov@google.com> 4 Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org> 5 Copyright (C) 2017 IBM 6 7 Modified for s390x by Michael Munday <mike.munday@ibm.com> 8 9This file is part of libunwind. 10 11Permission is hereby granted, free of charge, to any person obtaining 12a copy of this software and associated documentation files (the 13"Software"), to deal in the Software without restriction, including 14without limitation the rights to use, copy, modify, merge, publish, 15distribute, sublicense, and/or sell copies of the Software, and to 16permit persons to whom the Software is furnished to do so, subject to 17the following conditions: 18 19The above copyright notice and this permission notice shall be 20included in all copies or substantial portions of the Software. 21 22THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 23EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 24MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 25NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 26LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 27OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 28WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 29 30// int _Us390x_getcontext (unw_tdep_context_t *ucp) 31 32 .global _Us390x_getcontext 33 .type _Us390x_getcontext, @function 34_Us390x_getcontext: 35 .cfi_startproc 36 37 // Save the minimal set of registers required to restore the 38 // context. Generally speaking this is just the preserved 39 // registers but we've also saved the parameter registers 40 // so that return values can be modified too. 41 42 // save PSW address 43 // (not strictly needed but makes other code simpler) 44 stg %r14,0x30(%r2) 45 46 // floating point parameters (not strictly needed) 47 std %f0,0x100(%r2) 48 std %f2,0x110(%r2) 49 std %f4,0x120(%r2) 50 std %f6,0x130(%r2) 51 52 // floating point preserved registers 53 stfpc 0xf8(%r2) 54 std %f8,0x140(%r2) 55 std %f9,0x148(%r2) 56 std %f10,0x150(%r2) 57 std %f11,0x158(%r2) 58 std %f12,0x160(%r2) 59 std %f13,0x168(%r2) 60 std %f14,0x170(%r2) 61 std %f15,0x178(%r2) 62 63 // preserved registers and parameters 64 lgr %r1,%r2 65 lghi %r2,0 66 stmg %r2,%r15,0x48(%r1) 67 68 br %r14 69 70 .cfi_endproc 71 .size _Us390x_getcontext, . - _Us390x_getcontext 72 73 // We do not need executable stack. 74 .section .note.GNU-stack,"",@progbits 75