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Diffstat (limited to 'include/asm-utils.h')
| -rw-r--r-- | include/asm-utils.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/asm-utils.h b/include/asm-utils.h new file mode 100644 index 0000000..503f2cc --- /dev/null +++ b/include/asm-utils.h @@ -0,0 +1,45 @@ +/* Copyright 2013-2014 IBM Corp. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef __ASM_UTILS_H +#define __ASM_UTILS_H + +/* + * Do NOT use the immediate load helpers with symbols + * only with constants. Symbols will _not_ be resolved + * by the linker since we are building -pie, and will + * instead generate relocs of a type our little built-in + * relocator can't handle + */ + +/* Load an immediate 64-bit value into a register */ +#define LOAD_IMM64(r, e) \ + lis r,(e)@highest; \ + ori r,r,(e)@higher; \ + rldicr r,r, 32, 31; \ + oris r,r, (e)@h; \ + ori r,r, (e)@l; + +/* Load an immediate 32-bit value into a register */ +#define LOAD_IMM32(r, e) \ + lis r,(e)@h; \ + ori r,r,(e)@l; + +/* Load an address via the TOC */ +#define LOAD_ADDR_FROM_TOC(r, e) ld r,e@got(%r2) + + +#endif /* __ASM_UTILS_H */ |