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Enable CPU exception handling w/ IDT & TSS (#640)

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tkchia 2022-09-30 05:43:08 +08:00 • committed by GitHub
parent 09811e739f
commit bc8532688b
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7 changed files with 231 additions and 7 deletions
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9
libc/macros.internal.h
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@ -16,9 +16,18 @@
#define IS2POW(X) (!((X) & ((X)-1)))
#define ROUNDUP(X, K) (((X) + (K)-1) & -(K))
#define ROUNDDOWN(X, K) ((X) & -(K))
#ifndef __ASSEMBLER__
#define ABS(X) ((X) >= 0 ? (X) : -(X))
#define MIN(X, Y) ((Y) > (X) ? (X) : (Y))
#define MAX(X, Y) ((Y) < (X) ? (X) : (Y))
#else
// The GNU assembler does not grok the ?: ternary operator; furthermore,
// boolean expressions yield -1 and 0 for "true" and "false", not 1 and 0.
#define __MAPBOOL(P) (!!(P) / (!!(P) + !(P)))
#define __IFELSE(P, X, Y) (__MAPBOOL(P) * (X) + __MAPBOOL(!(P)) * (Y))
#define MIN(X, Y) (__IFELSE((Y) > (X), (X), (Y)))
#define MAX(X, Y) (__IFELSE((Y) < (X), (X), (Y)))
#endif
#define PASTE(A, B) __PASTE(A, B)
#define STRINGIFY(A) __STRINGIFY(A)
#define EQUIVALENT(X, Y) (__builtin_constant_p((X) == (Y)) && ((X) == (Y)))