| /* SPDX-License-Identifier: GPL-2.0 */ |
| |
| #include <linux/linkage.h> |
| #include <asm/unwind_hints.h> |
| #include <asm/nospec-branch.h> |
| |
| /* |
| * Notably, the FineIBT preamble calling these will have ZF set and r10 zero. |
| * |
| * The very last element is in fact larger than 32 bytes, but since its the |
| * last element, this does not matter, |
| * |
| * There are 2 #UD sites, located between 0,1-2,3 and 4,5-6,7 such that they |
| * can be reached using Jcc.d8, these elements (1 and 5) have sufficiently |
| * big alignment holes for this to not stagger the array. |
| */ |
| |
| .pushsection .noinstr.text, "ax" |
| |
| .align 32 |
| SYM_CODE_START(__bhi_args) |
| |
| #ifdef CONFIG_FINEIBT_BHI |
| |
| .align 32 |
| SYM_INNER_LABEL(__bhi_args_0, SYM_L_LOCAL) |
| ANNOTATE_NOENDBR |
| UNWIND_HINT_FUNC |
| jne .Lud_1 |
| ANNOTATE_UNRET_SAFE |
| ret |
| int3 |
| |
| .align 32 |
| SYM_INNER_LABEL(__bhi_args_1, SYM_L_LOCAL) |
| ANNOTATE_NOENDBR |
| UNWIND_HINT_FUNC |
| jne .Lud_1 |
| cmovne %r10, %rdi |
| ANNOTATE_UNRET_SAFE |
| ret |
| int3 |
| |
| .align 8 |
| ANNOTATE_REACHABLE |
| .Lud_1: ud2 |
| ANNOTATE_UNRET_SAFE |
| ret |
| int3 |
| |
| .align 32 |
| SYM_INNER_LABEL(__bhi_args_2, SYM_L_LOCAL) |
| ANNOTATE_NOENDBR |
| UNWIND_HINT_FUNC |
| jne .Lud_1 |
| cmovne %r10, %rdi |
| cmovne %r10, %rsi |
| ANNOTATE_UNRET_SAFE |
| ret |
| int3 |
| |
| .align 32 |
| SYM_INNER_LABEL(__bhi_args_3, SYM_L_LOCAL) |
| ANNOTATE_NOENDBR |
| UNWIND_HINT_FUNC |
| jne .Lud_1 |
| cmovne %r10, %rdi |
| cmovne %r10, %rsi |
| cmovne %r10, %rdx |
| ANNOTATE_UNRET_SAFE |
| ret |
| int3 |
| |
| .align 32 |
| SYM_INNER_LABEL(__bhi_args_4, SYM_L_LOCAL) |
| ANNOTATE_NOENDBR |
| UNWIND_HINT_FUNC |
| jne .Lud_2 |
| cmovne %r10, %rdi |
| cmovne %r10, %rsi |
| cmovne %r10, %rdx |
| cmovne %r10, %rcx |
| ANNOTATE_UNRET_SAFE |
| ret |
| int3 |
| |
| .align 32 |
| SYM_INNER_LABEL(__bhi_args_5, SYM_L_LOCAL) |
| ANNOTATE_NOENDBR |
| UNWIND_HINT_FUNC |
| jne .Lud_2 |
| cmovne %r10, %rdi |
| cmovne %r10, %rsi |
| cmovne %r10, %rdx |
| cmovne %r10, %rcx |
| cmovne %r10, %r8 |
| ANNOTATE_UNRET_SAFE |
| ret |
| int3 |
| |
| .align 8 |
| ANNOTATE_REACHABLE |
| .Lud_2: ud2 |
| ANNOTATE_UNRET_SAFE |
| ret |
| int3 |
| |
| .align 32 |
| SYM_INNER_LABEL(__bhi_args_6, SYM_L_LOCAL) |
| ANNOTATE_NOENDBR |
| UNWIND_HINT_FUNC |
| jne .Lud_2 |
| cmovne %r10, %rdi |
| cmovne %r10, %rsi |
| cmovne %r10, %rdx |
| cmovne %r10, %rcx |
| cmovne %r10, %r8 |
| cmovne %r10, %r9 |
| ANNOTATE_UNRET_SAFE |
| ret |
| int3 |
| |
| .align 32 |
| SYM_INNER_LABEL(__bhi_args_7, SYM_L_LOCAL) |
| ANNOTATE_NOENDBR |
| UNWIND_HINT_FUNC |
| jne .Lud_2 |
| cmovne %r10, %rdi |
| cmovne %r10, %rsi |
| cmovne %r10, %rdx |
| cmovne %r10, %rcx |
| cmovne %r10, %r8 |
| cmovne %r10, %r9 |
| cmovne %r10, %rsp |
| ANNOTATE_UNRET_SAFE |
| ret |
| int3 |
| |
| #endif /* CONFIG_FINEIBT_BHI */ |
| |
| .align 32 |
| SYM_INNER_LABEL(__bhi_args_end, SYM_L_GLOBAL) |
| ANNOTATE_NOENDBR |
| nop /* Work around toolchain+objtool quirk */ |
| SYM_CODE_END(__bhi_args) |
| |
| .popsection |
