diff options
Diffstat (limited to 'sysdeps/i386/bp-asm.h')
| -rw-r--r-- | sysdeps/i386/bp-asm.h | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/sysdeps/i386/bp-asm.h b/sysdeps/i386/bp-asm.h index 2026b24f8b..94d656c0d0 100644 --- a/sysdeps/i386/bp-asm.h +++ b/sysdeps/i386/bp-asm.h @@ -34,81 +34,12 @@ /* 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 pushl %ebp; movl %esp, %ebp -# define LEAVE movl %ebp, %esp; popl %ebp /* Stack space overhead of procedure-call linkage: return address and frame pointer. */ # define LINKAGE 8 /* Stack offset of return address after calling ENTER. */ # define PCOFF 4 -/* 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) \ - cmpl 4+BP_MEM, VAL_REG; \ - jae 0f; /* continue if value >= low */ \ - BOUNDS_VIOLATED; \ - 0: - -# define CHECK_BOUNDS_HIGH(VAL_REG, BP_MEM, Jcc) \ - cmpl 8+BP_MEM, VAL_REG; \ - Jcc 0f; /* continue if value < high */ \ - BOUNDS_VIOLATED; \ - 0: - -# define CHECK_BOUNDS_BOTH(VAL_REG, BP_MEM) \ - cmpl 4+BP_MEM, VAL_REG; \ - jb 1f; /* die if value < low */ \ - cmpl 8+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; \ - cmpl 8+BP_MEM, VAL_REG; \ - jbe 0f; /* continue if value <= high */ \ - BOUNDS_VIOLATED; \ - 0: subl LENGTH, VAL_REG /* restore value */ - -/* Take bounds from BP_MEM and affix them to the pointer - value in %eax, stuffing all into memory at RTN(%esp). - Use %edx as a scratch register. */ - -# define RETURN_BOUNDED_POINTER(BP_MEM) \ - movl RTN(%esp), %edx; \ - movl %eax, 0(%edx); \ - movl 4+BP_MEM, %eax; \ - movl %eax, 4(%edx); \ - movl 8+BP_MEM, %eax; \ - movl %eax, 8(%edx) - -# define RETURN_NULL_BOUNDED_POINTER \ - movl RTN(%esp), %edx; \ - movl %eax, 0(%edx); \ - movl %eax, 4(%edx); \ - movl %eax, 8(%edx) - -/* 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 $8, %esp; \ - subl $4, %esp; \ - pushl %esp - -/* __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 \ - popl %eax; \ - addl $8, %esp - # else /* !__BOUNDED_POINTERS__ */ /* Unbounded pointers occupy one word. */ @@ -117,25 +48,11 @@ # 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 4 /* 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__ */ |