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Add simplified mmap() and munmap() syscalls.

This commit is contained in:
Andreas Kling 2018-10-24 09:48:24 +02:00
parent a5caf7ca99
commit 9a296d63f3
13 changed files with 116 additions and 2 deletions

1
Userland/.gitignore vendored
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@ -1,4 +1,5 @@
id
sh
ps
ls
*.o

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@ -1,12 +1,14 @@
OBJS = \
id.o \
sh.o \
ps.o
ps.o \
ls.o
APPS = \
id \
sh \
ps
ps \
ls
ARCH_FLAGS =
STANDARD_FLAGS = -std=c++17 -nostdinc++ -nostdlib
@ -35,6 +37,9 @@ sh: sh.o
ps: ps.o
$(LD) -o $@ $(LDFLAGS) $< ../LibC/LibC.a
ls: ls.o
$(LD) -o $@ $(LDFLAGS) $< ../LibC/LibC.a
.cpp.o:
@echo "CXX $<"; $(CXX) $(CXXFLAGS) -o $@ -c $<

21
Userland/ls.cpp Normal file
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@ -0,0 +1,21 @@
#include <LibC/stdio.h>
#include <LibC/unistd.h>
#include <LibC/mman.h>
int main(int c, char** v)
{
int fd = open("/");
if (fd == -1) {
printf("failed to open / :(\n");
return 1;
}
byte* memory = (byte*)mmap(nullptr, 16384);
printf("%p\n", memory);
memory[0] = 'H';
memory[1] = 'i';
memory[2] = '!';
memory[3] = '\0';
printf("%p : %s\n", memory, memory);
return 0;
}