Cannot access memory at address 0x0 (gdb) p pt->c Cannot access memory at address 0x4 (gdb) p pt->p Cannot access memory at address 0x8 注意:上面的pt->p的偏移之所以是0×8而不是0×6,是因为内存对齐了(我在64位系统上)。关于内存对齐,可参看《深入理解C语言》一文。 好了,现在你知道为...
Cannot access memory at address 0x0 (gdb) p pt->c Cannot access memory at address 0x4 (gdb) p pt->p Cannot access memory at address 0x8 注意:上面的pt->p的偏移之所以是0x8而不是0x6,是由于内存对齐了(我在64位系统上)。关于内存对齐。可參看《深入理解C语言》一文。 好了,如今你知道为什么...
Cannot access memory at address 0x0 (gdb) p pt->c Cannot access memory at address 0x4 (gdb) p pt->p Cannot access memory at address 0x8 注意:上面的pt->p的偏移之所以是0x8而不是0x6,是由于内存对齐了(我在64位系统上)。关于内存对齐,可參看《深入理解C语言》一文。 好了。如今你知道为什么...
Cannot access memory at address 0x0 (gdb) p pt->c Cannot access memory at address 0x4 (gdb) p pt->p Cannot access memory at address 0x8 注意:上面的pt...
#define EAGAIN 11 /*重试*/#define EAGAIN 11 /* Try again */#define ENOMEM 12 /*内存不足*/#define ENOMEM 12 /* Out of memory */#define EACCES 13 /*权限被拒绝*/#define EACCES 13 /* Permission denied */#define EFAULT 14 /*错误地址*/#define EFAULT 14 /* Bad address */#define ...
void mm_management_init(unsigned int free_memory_start, unsigned int free_memory_end) 1. 传入参数free_memory_start是内存初始化之后,剩余可申请的首地址,该地址,一般会传入到main函数,如果main()函数没有传入该参数的话,可以在内存初始化之后,自己malloc(4)申请一下,把返回的地址作为mm_management_init()...
操作系统为每个正 在运行的程序建立并维护•张被称为进程 内存映射 P(rocess Memory M ap ,缩与为PMM ) 的表,表中记录了程序可以存取的所有 内存页以及它们的实际位置。 每当程序存取一块 内存时,它会把相应的地址 虚(拟地址,virtualaddress)传送给 MMU, MMU会 在 PMM 中查找这块 内存的实际位置 物(理...
( Allocated memory at segment: %x\n , segp); else printf(Failed: maxim m n mber of paragraphs available is % \n”, stat); ret rn 0; ) 函数名 :arc 功能 :画一弧线 用 法:void far arc(int x, int y, int stangle, int endangle, int radi s); 序例 : #incl de graphics.h #...
指向指针的指针运用的好处：避免重复分配内存；只需要进行一处修改；代码的灵活性和安全性都显著提高Pointer array: An array whose element value is a pointer is a pointer array. A pointer array is an ordered collection of pointers.Advantages of using pointers to pointers: avoiding repeated memory ...
77094 Set Memory Block Size 77117 Load and Execute a Program 61.183.16.* 77144 Load Program 77159 Load Overlay 77172 Set Execution State 77193 End Program 77206 Get Child-Program Return Value 77238 Find First File 77255 Find Next File 77271 Set PSP address 77288 Get PSP address 77305 Get...