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Fix weird behavior issue w/ kprintf() on aarch64

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Justine Tunney 2023-05-10 06:17:33 -07:00
parent 4e81d3277c
commit 64aca4dc4f
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GPG key ID: BE714B4575D6E328
1 changed files with 6 additions and 11 deletions
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17
libc/intrin/kprintf.greg.c
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@ -18,6 +18,7 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#define ShouldUseMsabiAttribute() 1
#include "libc/intrin/kprintf.h"
#include "ape/sections.internal.h"
#include "libc/calls/calls.h"
#include "libc/calls/state.internal.h"
#include "libc/calls/syscall-sysv.internal.h"
@ -131,17 +132,8 @@ privileged static inline bool kistextpointer(const void *p) {
return _base <= (const unsigned char *)p && (const unsigned char *)p < _etext;
}
privileged static inline unsigned char *kend(void) {
unsigned char *p;
if (_weaken(__brk) && (p = _weaken(__brk)->p)) {
return p;
} else {
return _end;
}
}
privileged static inline bool kisimagepointer(const void *p) {
return _base <= (const unsigned char *)p && (const unsigned char *)p < kend();
return _base <= (const unsigned char *)p && (const unsigned char *)p < _end;
}
privileged static inline bool kischarmisaligned(const char *p, signed char t) {
@ -179,6 +171,7 @@ privileged static bool kismapped(int x) {
privileged bool kisdangerous(const void *p) {
int frame;
if (1) return false;
if (kisimagepointer(p)) return false;
if (kiskernelpointer(p)) return false;
if (IsLegalPointer(p)) {
@ -223,7 +216,7 @@ privileged static void klog(const char *b, size_t n) {
: "0"(__NR_write), "1"(2), "2"(b), "3"(n)
: "rcx", "r8", "r9", "r10", "r11", "memory", "cc");
}
#else
#elif defined(__aarch64__)
register long r0 asm("x0") = (long)2;
register long r1 asm("x1") = (long)b;
register long r2 asm("x2") = (long)n;
@ -233,6 +226,8 @@ privileged static void klog(const char *b, size_t n) {
: "=r"(res_x0)
: "i"(64), "r"(r0), "r"(r1), "r"(r2)
: "x8", "memory");
#else
#error "unsupported architecture"
#endif
}