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| 1 | /* GATE PROJECT LICENSE: | ||
| 2 | +----------------------------------------------------------------------------+ | ||
| 3 | | Copyright(c) 2018-2025, Stefan Meislinger <sm@opengate.at> | | ||
| 4 | | All rights reserved. | | ||
| 5 | | | | ||
| 6 | | Redistribution and use in source and binary forms, with or without | | ||
| 7 | | modification, are permitted provided that the following conditions are met:| | ||
| 8 | | | | ||
| 9 | | 1. Redistributions of source code must retain the above copyright notice, | | ||
| 10 | | this list of conditions and the following disclaimer. | | ||
| 11 | | 2. Redistributions in binary form must reproduce the above copyright | | ||
| 12 | | notice, this list of conditions and the following disclaimer in the | | ||
| 13 | | documentation and/or other materials provided with the distribution. | | ||
| 14 | | | | ||
| 15 | | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"| | ||
| 16 | | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | | ||
| 17 | | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | | ||
| 18 | | ARE DISCLAIMED.IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | | ||
| 19 | | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | | ||
| 20 | | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | | ||
| 21 | | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | | ||
| 22 | | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | | ||
| 23 | | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | | ||
| 24 | | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | | ||
| 25 | | THE POSSIBILITY OF SUCH DAMAGE. | | ||
| 26 | +----------------------------------------------------------------------------+ | ||
| 27 | */ | ||
| 28 | |||
| 29 | #include "gate/platform/posix/posixcallstack.h" | ||
| 30 | |||
| 31 | #if defined(GATE_SYS_POSIX) || defined(GATE_SYS_EFI) | ||
| 32 | |||
| 33 | typedef void* (*gate_posix_callstack_create_native_t)(void*, gate_callstack_context_t*, void*, void*); | ||
| 34 | typedef void* (*gate_posix_callstack_switch_native_t)(gate_callstack_context_t*, gate_callstack_context_t*); | ||
| 35 | |||
| 36 | |||
| 37 | #if defined(GATE_COMPILE_ASM_SUPPORT) | ||
| 38 | # if (GATE_ARCH == GATE_ARCH_X86IA32) | ||
| 39 | extern void* gate_posix_callstack_create_x86(void*, gate_callstack_context_t*, void*, void*); | ||
| 40 | extern void* gate_posix_callstack_switch_x86(gate_callstack_context_t*, gate_callstack_context_t*); | ||
| 41 | # define NATIVE_CALLSTACK_CREATE_FUNC gate_posix_callstack_create_x86 | ||
| 42 | # define NATIVE_CALLSTACK_SWITCH_FUNC gate_posix_callstack_switch_x86 | ||
| 43 | # elif (GATE_ARCH == GATE_ARCH_X86X64) | ||
| 44 | extern void* gate_posix_callstack_create_x64(void*, gate_callstack_context_t*, void*, void*); | ||
| 45 | extern void* gate_posix_callstack_switch_x64(gate_callstack_context_t*, gate_callstack_context_t*); | ||
| 46 | # define NATIVE_CALLSTACK_CREATE_FUNC gate_posix_callstack_create_x64 | ||
| 47 | # define NATIVE_CALLSTACK_SWITCH_FUNC gate_posix_callstack_switch_x64 | ||
| 48 | # elif (GATE_ARCH == GATE_ARCH_ARM32) | ||
| 49 | extern void* gate_posix_callstack_create_arm32(void*, gate_callstack_context_t*, void*, void*); | ||
| 50 | extern void* gate_posix_callstack_switch_arm32(gate_callstack_context_t*, gate_callstack_context_t*); | ||
| 51 | # define NATIVE_CALLSTACK_CREATE_FUNC gate_posix_callstack_create_arm32 | ||
| 52 | # define NATIVE_CALLSTACK_SWITCH_FUNC gate_posix_callstack_switch_arm32 | ||
| 53 | # elif (GATE_ARCH == GATE_ARCH_ARM64) | ||
| 54 | extern void* gate_posix_callstack_create_arm64(void*, gate_callstack_context_t*, void*, void*); | ||
| 55 | extern void* gate_posix_callstack_switch_arm64(gate_callstack_context_t*, gate_callstack_context_t*); | ||
| 56 | # define NATIVE_CALLSTACK_CREATE_FUNC gate_posix_callstack_create_arm64 | ||
| 57 | # define NATIVE_CALLSTACK_SWITCH_FUNC gate_posix_callstack_switch_arm64 | ||
| 58 | # else | ||
| 59 | # define NATIVE_CALLSTACK_CREATE_FUNC NULL | ||
| 60 | # define NATIVE_CALLSTACK_SWITCH_FUNC NULL | ||
| 61 | # endif | ||
| 62 | #else | ||
| 63 | # define NATIVE_CALLSTACK_CREATE_FUNC NULL | ||
| 64 | # define NATIVE_CALLSTACK_SWITCH_FUNC NULL | ||
| 65 | |||
| 66 | #endif | ||
| 67 | |||
| 68 | /* | ||
| 69 | NOTICE: | ||
| 70 | Use function pointers to native ASM routines to try to ensure that | ||
| 71 | LTO/WPO does not apply any kind of inlining which bypasses CDECL/ABI function calls. | ||
| 72 | We want that the compiler saves all auxiliary data registers (e.g. x87/mmx/xmm | ||
| 73 | before the native code switches stacks and mandatory CPU registers. | ||
| 74 | */ | ||
| 75 | |||
| 76 | static gate_posix_callstack_create_native_t native_callstack_create = NATIVE_CALLSTACK_CREATE_FUNC; | ||
| 77 | static gate_posix_callstack_switch_native_t native_callstack_switch = NATIVE_CALLSTACK_SWITCH_FUNC; | ||
| 78 | |||
| 79 | 3 | gate_bool_t gate_posix_callstack_supported() | |
| 80 | { | ||
| 81 |
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3 | return native_callstack_create && native_callstack_switch; |
| 82 | } | ||
| 83 | |||
| 84 | ✗ | void* gate_posix_callstack_create( | |
| 85 | void* stack_ptr_top, | ||
| 86 | gate_callstack_context_t* store_old_stack, | ||
| 87 | void* func_ptr, void* func_param) | ||
| 88 | { | ||
| 89 | ✗ | if (native_callstack_create) | |
| 90 | { | ||
| 91 | ✗ | return native_callstack_create(stack_ptr_top, store_old_stack, func_ptr, func_param); | |
| 92 | } | ||
| 93 | ✗ | return NULL; | |
| 94 | } | ||
| 95 | |||
| 96 | ✗ | void* gate_posix_callstack_switch( | |
| 97 | gate_callstack_context_t* store_current_context, | ||
| 98 | gate_callstack_context_t* load_next_context) | ||
| 99 | { | ||
| 100 | ✗ | if (native_callstack_switch) | |
| 101 | { | ||
| 102 | ✗ | return native_callstack_switch(store_current_context, load_next_context); | |
| 103 | } | ||
| 104 | ✗ | return NULL; | |
| 105 | } | ||
| 106 | |||
| 107 | #endif | ||
| 108 |