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Diffstat (limited to 'sysdeps/x86_64/bp-asm.h')
| -rw-r--r-- | sysdeps/x86_64/bp-asm.h | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/sysdeps/x86_64/bp-asm.h b/sysdeps/x86_64/bp-asm.h deleted file mode 100644 index 10916fd95e..0000000000 --- a/sysdeps/x86_64/bp-asm.h +++ /dev/null @@ -1,140 +0,0 @@ -/* Bounded-pointer definitions for x86-64 assembler. - Copyright (C) 2001-2013 Free Software Foundation, Inc. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#ifndef _bp_asm_h_ -# define _bp_asm_h_ 1 - -# if __ASSEMBLER__ - -# if __BOUNDED_POINTERS__ - -/* Bounded pointers occupy three words. */ -# define PTR_SIZE 24 -/* Bounded pointer return values are passed back through a hidden - argument that points to caller-allocate space. The hidden arg - occupies one word on the stack. */ -# define RTN_SIZE 6 -/* Although the caller pushes the hidden arg, the callee is - responsible for popping it. */ -# define RET_PTR ret $RTN_SIZE -/* Maintain frame pointer chain in leaf assembler functions for the benefit - of debugging stack traces when bounds violations occur. */ -# define ENTER pushq %rbp; movq %rsp, %rbp -# define LEAVE movq %rbp, %rsp; popq %rbp -/* Stack space overhead of procedure-call linkage: return address and - frame pointer. */ -# define LINKAGE 16 -/* Stack offset of return address after calling ENTER. */ -# define PCOFF 8 - -/* Int 5 is the "bound range" exception also raised by the "bound" - instruction. */ -# define BOUNDS_VIOLATED int $5 - -# define CHECK_BOUNDS_LOW(VAL_REG, BP_MEM) \ - cmpq 8+BP_MEM, VAL_REG; \ - jae 0f; /* continue if value >= low */ \ - BOUNDS_VIOLATED; \ - 0: - -# define CHECK_BOUNDS_HIGH(VAL_REG, BP_MEM, Jcc) \ - cmpq 16+BP_MEM, VAL_REG; \ - Jcc 0f; /* continue if value < high */ \ - BOUNDS_VIOLATED; \ - 0: - -# define CHECK_BOUNDS_BOTH(VAL_REG, BP_MEM) \ - cmpq 8+BP_MEM, VAL_REG; \ - jb 1f; /* die if value < low */ \ - cmpq 16+BP_MEM, VAL_REG; \ - jb 0f; /* continue if value < high */ \ - 1: BOUNDS_VIOLATED; \ - 0: - -# define CHECK_BOUNDS_BOTH_WIDE(VAL_REG, BP_MEM, LENGTH) \ - CHECK_BOUNDS_LOW(VAL_REG, BP_MEM); \ - addl LENGTH, VAL_REG; \ - cmpq 16+BP_MEM, VAL_REG; \ - jbe 0f; /* continue if value <= high */ \ - BOUNDS_VIOLATED; \ - 0: subq LENGTH, VAL_REG /* restore value */ - -/* Take bounds from BP_MEM and affix them to the pointer - value in %rax, stuffing all into memory at RTN(%esp). - Use %rdx as a scratch register. */ - -# define RETURN_BOUNDED_POINTER(BP_MEM) \ - movq RTN(%rsp), %rdx; \ - movq %rax, 0(%rdx); \ - movq 8+BP_MEM, %rax; \ - movq %rax, 4(%rdx); \ - movq 16+BP_MEM, %rax; \ - movq %rax, 8(%rdx) - -# define RETURN_NULL_BOUNDED_POINTER \ - movl RTN(%rsp), %rdx; \ - movl %rax, 0(%rdx); \ - movl %rax, 4(%rdx); \ - movl %rax, 8(%rdx) - -/* The caller of __errno_location is responsible for allocating space - for the three-word BP return-value and passing pushing its address - as an implicit first argument. */ -# define PUSH_ERRNO_LOCATION_RETURN \ - subl $16, %esp; \ - subl $8, %esp; \ - pushq %rsp - -/* __errno_location is responsible for popping the implicit first - argument, but we must pop the space for the BP itself. We also - dereference the return value in order to dig out the pointer value. */ -# define POP_ERRNO_LOCATION_RETURN \ - popq %rax; \ - addq $16, %rsp - -# else /* !__BOUNDED_POINTERS__ */ - -/* Unbounded pointers occupy one word. */ -# define PTR_SIZE 8 -/* Unbounded pointer return values are passed back in the register %rax. */ -# define RTN_SIZE 0 -/* Use simple return instruction for unbounded pointer values. */ -# define RET_PTR ret -/* Don't maintain frame pointer chain for leaf assembler functions. */ -# define ENTER -# define LEAVE -/* Stack space overhead of procedure-call linkage: return address only. */ -# define LINKAGE 8 -/* Stack offset of return address after calling ENTER. */ -# define PCOFF 0 - -# define CHECK_BOUNDS_LOW(VAL_REG, BP_MEM) -# define CHECK_BOUNDS_HIGH(VAL_REG, BP_MEM, Jcc) -# define CHECK_BOUNDS_BOTH(VAL_REG, BP_MEM) -# define CHECK_BOUNDS_BOTH_WIDE(VAL_REG, BP_MEM, LENGTH) -# define RETURN_BOUNDED_POINTER(BP_MEM) - -# define RETURN_NULL_BOUNDED_POINTER - -# define PUSH_ERRNO_LOCATION_RETURN -# define POP_ERRNO_LOCATION_RETURN - -# endif /* !__BOUNDED_POINTERS__ */ - -# endif /* __ASSEMBLER__ */ - -#endif /* _bp_asm_h_ */ |