diff options
Diffstat (limited to 'sys/cddl/dev/kinst/amd64/kinst_isa.h')
| -rw-r--r-- | sys/cddl/dev/kinst/amd64/kinst_isa.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sys/cddl/dev/kinst/amd64/kinst_isa.h b/sys/cddl/dev/kinst/amd64/kinst_isa.h new file mode 100644 index 000000000000..93d3a1d3ddeb --- /dev/null +++ b/sys/cddl/dev/kinst/amd64/kinst_isa.h @@ -0,0 +1,42 @@ +/* + * SPDX-License-Identifier: CDDL 1.0 + * + * Copyright (c) 2022 Christos Margiolis <christos@FreeBSD.org> + * Copyright (c) 2022 Mark Johnston <markj@FreeBSD.org> + * Copyright (c) 2023 The FreeBSD Foundation + * + * Portions of this software were developed by Christos Margiolis + * <christos@FreeBSD.org> under sponsorship from the FreeBSD Foundation. + */ + +#ifndef _KINST_ISA_H_ +#define _KINST_ISA_H_ + +#include <sys/types.h> + +#define KINST_PATCHVAL 0xcc + +/* + * Each trampoline is 32 bytes long and contains [instruction, jmp]. Since we + * have 2 instructions stored in the trampoline, and each of them can take up + * to 16 bytes, 32 bytes is enough to cover even the worst case scenario. + */ +#define KINST_TRAMP_SIZE 32 + +typedef uint8_t kinst_patchval_t; + +struct kinst_probe_md { + int flags; + int instlen; /* original instr len */ + int tinstlen; /* trampoline instr len */ + uint8_t template[16]; /* copied into thread tramps */ + int dispoff; /* offset of rip displacement */ + + /* operands to "call" instruction branch target */ + int reg1; + int reg2; + int scale; + int64_t disp; +}; + +#endif /* _KINST_ISA_H_ */ |