What is a relocating loader in computer?
What is a relocating loader in computer?
A relocating loader is capable of loading a program to begin anywhere in memory: The addresses produced by the compiler run from 0 to L–1. After the program has been loaded, the addresses must run from N to N +L–1. Therefore, the relocating loader adjusts, or relocates, each address in the program.
What is relocatable loading?
A relocatable loader is a loader which allows this delay of binding time. A relocatable loader accepts as input a sequence of segments, each in a special relocatable load format, and loads these segments into memory.
What are self-relocating program?
In computer programming, a self-relocating program is a program that relocates its own address-dependent instructions and data when run, and is therefore capable of being loaded into memory at any address. In many cases, self-relocating code is also a form of self-modifying code.
What is relocation concept?
Relocation is the process of connecting symbolic references with symbolic definitions. For example, when a program calls a function, the associated call instruction must transfer control to the proper destination address at execution.
What are the advantages and disadvantages of relocating loader?
The advantage is that no overhead occurs unless the procedure to be called or referenced is actually used. Disadvantage is considerable overhead & complexity because loading & linking is postponed until execution time.
What are types of loaders?
The different types of loaders are, absolute loader, bootstrap loader, relocating loader (relative loader), and, direct linking loader. The following sections discuss the functions and design of all these types of loaders.
What is an absolute loader and relocatable loader?
The absolute loader is a kind of loader in which relocated object files are created, loader accepts these files and places them at a specified location in the memory. This type of loader is called absolute loader because no relocating information is needed, rather it is obtained from the programmer or assembler.
What is compile go load scheme?
In computer programming, a compile and go system, compile, load, and go system, assemble and go system, or load and go system is a programming language processor in which the compilation, assembly, or link steps are not separated from program execution.
What is translated origin?
Translated origin – While compiling a program P, a translator is given an origin specification for P. This is called the translated origin of P. The translator uses the value of the translated origin to perform the memory allocation for the symbols declared in P.
In which type of loader relocation bits are used?
Discussion Forum
| Que. | Relocation bits used by relocating loader are specified (generated) by |
|---|---|
| b. | Linker |
| c. | Assembler or translator |
| d. | Macro processor |
| Answer:Linker |
What is relocatable code?
Relocatable code is software whose execution address can be changed. A relocatable program might run at address 0 in one instance, and at 10000 in another. Just to confuse the issue, partially built programs are composed of object modules unfortunately called “relocatables”.
Which loader does not need relocation information?
Absolute loader is a kind of loader in which relocated object files are created, loader accepts these files and places them at specified locations in the memory. This type of loader is called absolute because no relocation information is needed; rather it is obtained from the programmer or assembler.
