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20鱼币
前情回顾:
android读时间戳
<font color="red">[已解决]</font>android读时间戳
https://fishc.com.cn/thread-233062-1-1.html
(出处: 鱼C论坛)
- #ifdef __linux__
- // GCC
- void InternalSource::entropy_read_timestamp(unsigned long long* out) {
- unsigned int re[2] = { 0 };
- asm("RdTSC\nmov %0, %%eax\n" : "=r" (re[0]));
- asm("mov %0, %%edx\n" : "=r" (re[1]));
- *out = *(unsigned long long*)re;
- }
- #elif defined(_M_IX86)
- // VisualStudio
- void InternalSource::entropy_read_timestamp(uint64_t* out) {
- uint64_t re = 0;
- _asm {
- RdTSC
- mov DWORD PTR re, eax
- mov DWORD PTR[re + 4], edx
- }
- *out = re;
- }
- #endif
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有大佬给出了x86下的汇编
- void entropy_read_timestamp(uint64_t* out) {
- uint32_t re[2] = { 0 };
- asm volatile("RdTSC\nmov %0, %%eax\n" : "=r" (re[0]));
- asm volatile("mov %0, %%edx\n" : "=r" (re[1]));
- *out = *((uint64_t*)re);
- }
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以及ARM下的- .global _entropy_read_timestamp
- .type _entropy_read_timestamp, @function
- _entropy_read_timestamp:
- mrs x0, cntvct_el0 // 读取计时器的值到寄存器x0
- ret
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无奈笔者实在是不会汇编,大佬貌似不会回复楼中楼,只能再发个悬赏,求助符合原函数格式的(补充:Android Studio项目采用的C/C++开发),能在Mac系统下AS里能运行的ARM汇编指令,拜谢
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