vasilito
ff4ff35918
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_RUNTIME_CONST_H
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#define _ASM_RUNTIME_CONST_H
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#ifdef MODULE
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#error "Cannot use runtime-const infrastructure from modules"
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#endif
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#ifdef __ASSEMBLER__
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.macro RUNTIME_CONST_PTR sym reg
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movq $0x0123456789abcdef, %\reg
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1:
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.pushsection runtime_ptr_\sym, "a"
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.long 1b - 8 - .
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.popsection
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.endm
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#else /* __ASSEMBLER__ */
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#define runtime_const_ptr(sym) ({ \
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typeof(sym) __ret; \
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asm_inline("mov %1,%0\n1:\n" \
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".pushsection runtime_ptr_" #sym ",\"a\"\n\t" \
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".long 1b - %c2 - .\n" \
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".popsection" \
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:"=r" (__ret) \
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:"i" ((unsigned long)0x0123456789abcdefull), \
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"i" (sizeof(long))); \
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__ret; })
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// The 'typeof' will create at _least_ a 32-bit type, but
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// will happily also take a bigger type and the 'shrl' will
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// clear the upper bits
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#define runtime_const_shift_right_32(val, sym) ({ \
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typeof(0u+(val)) __ret = (val); \
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asm_inline("shrl $12,%k0\n1:\n" \
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".pushsection runtime_shift_" #sym ",\"a\"\n\t" \
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".long 1b - 1 - .\n" \
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".popsection" \
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:"+r" (__ret)); \
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__ret; })
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#define runtime_const_init(type, sym) do { \
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extern s32 __start_runtime_##type##_##sym[]; \
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extern s32 __stop_runtime_##type##_##sym[]; \
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runtime_const_fixup(__runtime_fixup_##type, \
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(unsigned long)(sym), \
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__start_runtime_##type##_##sym, \
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__stop_runtime_##type##_##sym); \
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} while (0)
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/*
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* The text patching is trivial - you can only do this at init time,
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* when the text section hasn't been marked RO, and before the text
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* has ever been executed.
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*/
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static inline void __runtime_fixup_ptr(void *where, unsigned long val)
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{
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*(unsigned long *)where = val;
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}
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static inline void __runtime_fixup_shift(void *where, unsigned long val)
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{
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*(unsigned char *)where = val;
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}
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static inline void runtime_const_fixup(void (*fn)(void *, unsigned long),
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unsigned long val, s32 *start, s32 *end)
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{
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while (start < end) {
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fn(*start + (void *)start, val);
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start++;
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}
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}
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#endif /* __ASSEMBLER__ */
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#endif
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