developersguide:newkernelcall
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developersguide:newkernelcall [2015/09/22 20:18] shawnsustrich Changed line text indicating where user should add sys_sample.c |
developersguide:newkernelcall [2025/02/14 19:31] (current) johnnoble |
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| This tutorial helps you to add a new kernel call in MINIX. Let's say your new kernel call is called //sample//. | This tutorial helps you to add a new kernel call in MINIX. Let's say your new kernel call is called //sample//. | ||
| - | - Add the prototype of your kernel function do_sample() in the file: ///usr/src/minix/kernel/system.h// | + | * Add the prototype of your kernel function do_sample() in the file: ///usr/src/minix/kernel/system.h// |
| <code> | <code> | ||
| ... | ... | ||
| Line 12: | Line 12: | ||
| #endif /* SYSTEM_H */ | #endif /* SYSTEM_H */ | ||
| </code> | </code> | ||
| - | - Write the implementation of do_sample() in its own source file: ///usr/src/minix/kernel/system/do_sample.c// | + | * Write the implementation of do_sample() in its own source file: ///usr/src/minix/kernel/system/do_sample.c// |
| <code> | <code> | ||
| #include "kernel/system.h" | #include "kernel/system.h" | ||
| #include <minix/endpoint.h> | #include <minix/endpoint.h> | ||
| - | /*===========================================================================* | + | /*===========================================================================* |
| * do_sample * | * do_sample * | ||
| *===========================================================================*/ | *===========================================================================*/ | ||
| Line 25: | Line 25: | ||
| } | } | ||
| </code> | </code> | ||
| - | - Add do_sample.c to the Makefile for compilation: ///usr/src/minix/kernel/system/Makefile.inc// | + | * Add do_sample.c to the Makefile for compilation: ///usr/src/minix/kernel/system/Makefile.inc// |
| <code> | <code> | ||
| # Makefile for system library implementation | # Makefile for system library implementation | ||
| Line 39: | Line 39: | ||
| do_sample.c | do_sample.c | ||
| </code> | </code> | ||
| - | - Map SYS_SAMPLE to do_sample() in the system call table: ///usr/src/minix/kernel/system.c// | + | * Map SYS_SAMPLE to do_sample() in the system call table: ///usr/src/minix/kernel/system.c// |
| <code> | <code> | ||
| ... | ... | ||
| Line 46: | Line 46: | ||
| ... | ... | ||
| </code> | </code> | ||
| - | - Add a prototype for the sys_sample function in the file: ///usr/src/minix/include/minix/syslib.h// | + | * Add a prototype for the sys_sample function in the file: ///usr/src/minix/include/minix/syslib.h// |
| <code> | <code> | ||
| ... | ... | ||
| Line 52: | Line 52: | ||
| ... | ... | ||
| </code> | </code> | ||
| - | - Add the call number for sys_sample to the call vector and increment its dimension: ///usr/src/minix/include/minix/com.h// | + | * Add the call number for sys_sample to the call vector and increment its dimension: ///usr/src/minix/include/minix/com.h// |
| <code> | <code> | ||
| ... | ... | ||
| Line 63: | Line 63: | ||
| ... | ... | ||
| </code> | </code> | ||
| - | - Add the SAMPLE service to the system tab: ///usr/src/minix/commands/service/parse.c//; build the updated system tab and install it with //make; make install// from ///usr/src/minix/commands/service/// | + | * Add the SAMPLE service to the system tab: ///usr/src/minix/commands/service/parse.c//; build the updated system tab and install it with //make; make install// from ///usr/src/minix/commands/service/// |
| <code> | <code> | ||
| ... | ... | ||
| Line 79: | Line 79: | ||
| ... | ... | ||
| </code> | </code> | ||
| - | - Write your implementation of the function sys_sample in a new file: ///usr/src/minix/lib/libsys/sys_sample.c// | + | * Write your implementation of the function sys_sample in a new file: ///usr/src/minix/lib/libsys/sys_sample.c// |
| <code> | <code> | ||
| #include "syslib.h" | #include "syslib.h" | ||
| Line 90: | Line 90: | ||
| } | } | ||
| </code> | </code> | ||
| - | - Add sys_sample.c to the ///usr/src/minix/lib/libsys/Makefile//, and install it in ///usr/lib/${MACHINE_ARCH}// with //make install//. | + | * Add sys_sample.c to the ///usr/src/minix/lib/libsys/Makefile//, and install it in ///usr/lib/${MACHINE_ARCH}// with //make install//. |
| <code> | <code> | ||
| # Makefile for libsys | # Makefile for libsys | ||
developersguide/newkernelcall.1442945921.txt.gz · Last modified: 2015/09/22 20:18 by shawnsustrich
