projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 04277e02 | 1 | /* Copyright (C) 2001-2019 Free Software Foundation, Inc. |
| d5efd131 MF |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by David Mosberger-Tang <davidm@hpl.hp.com>. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 75efb018 MF |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| d5efd131 MF |
18 | |
| 19 | #include <sysdep.h> | |
| 20 | #include <features.h> | |
| 21 | ||
| 22 | /* When a context set up by __makecontext() is activated, control | |
| 23 | transfers to __start_context. When we get here: | |
| 24 | ||
| 25 | b1 = entry point of function to call | |
| 26 | in0 = address of UCP to resume after function returns | |
| 27 | in1 = global pointer for __start_context | |
| 28 | out0 .. outN = arguments for function */ | |
| 29 | ||
| 30 | ENTRY(__start_context) | |
| 31 | .prologue | |
| 32 | alloc r2 = ar.pfs, 2, 0, 8, 0 | |
| 33 | ||
| 34 | .save rp, r4 // terminate call chain with a NULL rp | |
| 35 | mov r4 = r0 | |
| 36 | ;; | |
| 37 | ||
| 38 | .body | |
| 39 | br.call.sptk rp = b1 | |
| 40 | 1: | |
| 41 | mov gp = in1 // restore gp | |
| 42 | cmp.ne p6,p0 = in0, r0 // uc_link != 0 ? | |
| 43 | ;; | |
| 44 | (p6) mov out0 = in0 | |
| 45 | (p6) br.call.sptk rp = __setcontext | |
| 46 | .Lexit: | |
| 47 | mov out0 = 0 | |
| 48 | br.call.sptk rp = HIDDEN_JUMPTARGET(exit) | |
| 49 | ||
| 50 | 1: br.cond.sptk .Lexit | |
| 51 | END(__start_context) |