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/*
* Relocation types used in the I860 implementation. Relocation entries for
* things other than instructions use the same generic relocation as discribed
* above and their r_type is RELOC_VANILLA. The rest of the relocation types
* are for instructions. Since they are for instructions the r_address field
* indicates the 32 bit instruction that the relocation is to be preformed on.
* The fields r_pcrel and r_length are ignored for non-RELOC_VANILLA r_types
* except RELOC_SPLIT0 as discribed below.
*/
enum reloc_type_i860
{
I860_RELOC_VANILLA, /* generic relocation as discribed above */
I860_RELOC_PAIR, /* Only follows a I860_RELOC_HIGH or a
* I860_RELOC_HIGHADJ and only the r_address has any
* meaning.
*/
I860_RELOC_HIGH, /* The low 16 bits of the instruction contains the high
* 16 bits of the item being refered to. This
* relocation type must be followed by a I860_RELOC_PAIR
* relocation type. The low 16 bits of the item being
* refered to is stored in the r_address of the
* I860_RELOC_PAIR entry.
*/
I860_RELOC_LOW0, /* For all of these the low 16 bits of the instruction*/
I860_RELOC_LOW1, /* (minus the low 0, 1, 2, 3, or 4 bits) contain the */
I860_RELOC_LOW2, /* low 16 bits of the item being refered to. The bits*/
I860_RELOC_LOW3, /* of the reference that are missing are 0 and the */
I860_RELOC_LOW4, /* bits in the instruction are part of the encoding of*/
/* instruction. The resulting low 16 bits of the item*/
/* being refered to is sign extended to 32 bits. */
I860_RELOC_SPLIT0, /* For all of these the bits 20-14 and bits 10-0 of */
I860_RELOC_SPLIT1, /* the instruction (minus the low 0, 1 or 2 bits) */
I860_RELOC_SPLIT2, /* contain the low 16 bits of the item to being */
/* refered to. The bits of the reference that are */
/* missing are 0 and the bits of the instruction are */
/* part of the encoding of the instruction. The */
/* resulting low 16 bits of the item being relocated */
/* is sign extened to 32 bits. A special case of the */
/* I860_RELOC_SPLIT0 is when r_pcrel is non-zero (for */
/* branch displacements). In this case the 16 bits */
/* from the instruction is a 32 bit word displacement.*/
I860_RELOC_HIGHADJ, /* Same as the RELOC_HIGH except the low 16 bits and the
* high 16 bits are added together with the low 16 bits
* sign extened first. This means if bit 15 of the low
* 16 bits is set the high 16 bits stored in the
* instruction will be adjusted.
*/
I860_RELOC_BRADDR, /* The low 26 bits of the instruction is a 32 bit
* word displacement from the pc to the item to being
* refered to.
*/
I860_RELOC_SECTDIFF /* a PAIR follows with subtract symbol value */
};
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