diff options
Diffstat (limited to 'mdk-stage1/dietlibc/i386/PIC.h')
| -rw-r--r-- | mdk-stage1/dietlibc/i386/PIC.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/i386/PIC.h b/mdk-stage1/dietlibc/i386/PIC.h new file mode 100644 index 000000000..45ddeb446 --- /dev/null +++ b/mdk-stage1/dietlibc/i386/PIC.h @@ -0,0 +1,82 @@ +#ifndef __I386_PIC_H__ +#define __I386_PIC_H__ +#ifdef __DYN_LIB + +#if 1 +/* don't trash the athlon return stack */ +.text +.Lgetpic: + mov (%esp),%ebx + ret + +.macro PIC_INIT + call .Lgetpic + addl $_GLOBAL_OFFSET_TABLE_, %ebx +.endm +#else +/* standard code for PIC init */ +.macro PIC_INIT + call 0f +0: popl %ebx + addl $_GLOBAL_OFFSET_TABLE_+[.-0b], %ebx +.endm +#endif + +#define PIC_SAVE pushl %ebx +#define PIC_RESTORE popl %ebx + + +/* get memory variable (var) in register (reg) */ +.macro GET_VAR var reg + movl \var@GOT(%ebx), \reg + movl (\reg), \reg +.endm + +/* put register (reg) into memory variable (var) TRASH register (tmp) */ +.macro PUT_VAR reg var tmp + movl \var@GOT(%ebx), \tmp + movl \reg, (\tmp) +.endm + +/* get memory variable (var) in register (reg) + * IF no more PIC-code is needed */ +.macro GET_1VAR var reg + PIC_SAVE + PIC_INIT + GET_VAR \var, \reg + PIC_RESTORE +.endm + +/* put register (reg) into memory variable (var) + * IF no more PIC-code is needed */ +.macro PUT_1VAR reg var + PIC_SAVE + PIC_INIT + PUT_VAR \reg, \var, %ebx + PIC_RESTORE +.endm + +#else + +#define PIC_SAVE +#define PIC_RESTORE +#define PIC_INIT + +.macro GET_VAR var reg + movl \var, \reg +.endm + +.macro PUT_VAR reg var tmp + movl \reg, \var +.endm + +.macro GET_1VAR var reg + GET_VAR \var, \reg +.endm + +.macro PUT_1VAR reg var + PUT_VAR \reg, \var, none +.endm + +#endif +#endif |