| 1 | /* Machine dependent pthreads code. Hurd/x86_64 version. |
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| 2 | Copyright (C) 2000-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <errno.h> |
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| 20 | #include <assert.h> |
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| 21 | |
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| 22 | #include <mach.h> |
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| 23 | #include <mach/machine/thread_status.h> |
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| 24 | #include <mach/x86_64/mach_i386.h> |
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| 25 | #include <mach/mig_errors.h> |
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| 26 | #include <mach/thread_status.h> |
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| 27 | |
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| 28 | int |
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| 29 | __thread_set_pcsptp (thread_t thread, |
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| 30 | int set_ip, void *ip, |
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| 31 | int set_sp, void *sp, |
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| 32 | int set_tp, void *tp) |
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| 33 | { |
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| 34 | error_t err; |
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| 35 | struct i386_thread_state state; |
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| 36 | struct i386_fsgs_base_state fsgs_state; |
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| 37 | mach_msg_type_number_t state_count; |
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| 38 | |
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| 39 | state_count = i386_THREAD_STATE_COUNT; |
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| 40 | |
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| 41 | err = __thread_get_state (thread, i386_REGS_SEGS_STATE, |
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| 42 | (thread_state_t) &state, &state_count); |
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| 43 | if (err) |
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| 44 | return err; |
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| 45 | assert (state_count == i386_THREAD_STATE_COUNT); |
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| 46 | |
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| 47 | if (set_sp) |
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| 48 | state.ursp = (uintptr_t) sp; |
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| 49 | if (set_ip) |
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| 50 | state.rip = (uintptr_t) ip; |
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| 51 | |
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| 52 | err = __thread_set_state (thread, i386_REGS_SEGS_STATE, |
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| 53 | (thread_state_t) &state, i386_THREAD_STATE_COUNT); |
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| 54 | if (err) |
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| 55 | return err; |
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| 56 | |
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| 57 | if (set_tp) |
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| 58 | { |
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| 59 | state_count = i386_FSGS_BASE_STATE_COUNT; |
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| 60 | err = __thread_get_state (thread, i386_FSGS_BASE_STATE, |
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| 61 | (thread_state_t) &fsgs_state, &state_count); |
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| 62 | if (err) |
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| 63 | return err; |
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| 64 | assert (state_count == i386_FSGS_BASE_STATE_COUNT); |
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| 65 | fsgs_state.fs_base = (uintptr_t) tp; |
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| 66 | err = __thread_set_state (thread, i386_FSGS_BASE_STATE, |
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| 67 | (thread_state_t) &fsgs_state, state_count); |
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| 68 | if (err) |
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| 69 | return err; |
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| 70 | } |
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| 71 | |
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| 72 | return 0; |
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| 73 | } |
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| 74 | |
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