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kernel: munmap syscall

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Matheus
2023-06-12 23:11:59 -03:00
parent 320366586c
commit 851385fbff
3 changed files with 36 additions and 6 deletions
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kernel-src/arch/x86-64/syscall.asm
+3 -1
View File
@@ -14,6 +14,7 @@ extern syscall_fork
extern syscall_execve extern syscall_execve
extern syscall_exit extern syscall_exit
extern syscall_waitpid extern syscall_waitpid
extern syscall_munmap
syscalltab: syscalltab:
dq syscall_print dq syscall_print
dq syscall_mmap dq syscall_mmap
@@ -30,7 +31,8 @@ dq syscall_fork
dq syscall_execve dq syscall_execve
dq syscall_exit dq syscall_exit
dq syscall_waitpid dq syscall_waitpid
syscallcount equ 15 dq syscall_munmap
syscallcount equ 16
section .text section .text
global arch_syscall_entry global arch_syscall_entry
; on entry: ; on entry:
kernel-src/sys/syscalls/munmap.c
+27
View File
@@ -0,0 +1,27 @@
#include <kernel/syscalls.h>
#include <kernel/vmm.h>
#include <errno.h>
syscallret_t syscall_munmap(context_t *ctx, void *addr, size_t length) {
syscallret_t ret = {
.ret = -1,
.errno = 0
};
if (addr > USERSPACE_END) {
ret.errno = EFAULT;
return ret;
}
if (length == 0 || length % PAGE_SIZE > 0) {
ret.errno = EINVAL;
return ret;
}
vmm_unmap(addr, length / PAGE_SIZE, 0);
ret.ret = 0;
ret.errno = 0;
return ret;
}
patches/mlibc/jinx-working-patch.patch
+6 -5
View File
@@ -133,7 +133,7 @@ index 0000000..e5b087a
+ +
diff --git mlibc-workdir/sysdeps/astral/generic/generic.cpp mlibc-workdir/sysdeps/astral/generic/generic.cpp diff --git mlibc-workdir/sysdeps/astral/generic/generic.cpp mlibc-workdir/sysdeps/astral/generic/generic.cpp
new file mode 100644 new file mode 100644
index 0000000..afd1ebc index 0000000..601407e
--- /dev/null --- /dev/null
+++ mlibc-workdir/sysdeps/astral/generic/generic.cpp +++ mlibc-workdir/sysdeps/astral/generic/generic.cpp
@@ -0,0 +1,193 @@ @@ -0,0 +1,193 @@
@@ -314,8 +314,8 @@ index 0000000..afd1ebc
+ } + }
+ +
+ int sys_vm_unmap(void *pointer, size_t size) { + int sys_vm_unmap(void *pointer, size_t size) {
+ // TODO UNSTUB + long ret;
+ return ENOSYS; + return syscall(SYSCALL_MUNMAP, &ret, (uintptr_t)pointer, size);
+ } + }
+ +
+ int sys_isatty(int fd) { + int sys_isatty(int fd) {
@@ -349,10 +349,10 @@ index 0000000..990eca0
+#endif +#endif
diff --git mlibc-workdir/sysdeps/astral/include/astral/syscall.h mlibc-workdir/sysdeps/astral/include/astral/syscall.h diff --git mlibc-workdir/sysdeps/astral/include/astral/syscall.h mlibc-workdir/sysdeps/astral/include/astral/syscall.h
new file mode 100644 new file mode 100644
index 0000000..43c4367 index 0000000..1562c23
--- /dev/null --- /dev/null
+++ mlibc-workdir/sysdeps/astral/include/astral/syscall.h +++ mlibc-workdir/sysdeps/astral/include/astral/syscall.h
@@ -0,0 +1,38 @@ @@ -0,0 +1,39 @@
+#ifndef _SYSCALL_H_INCLUDE +#ifndef _SYSCALL_H_INCLUDE
+#define _SYSCALL_H_INCLUDE +#define _SYSCALL_H_INCLUDE
+ +
@@ -371,6 +371,7 @@ index 0000000..43c4367
+#define SYSCALL_EXECVE 12 +#define SYSCALL_EXECVE 12
+#define SYSCALL_EXIT 13 +#define SYSCALL_EXIT 13
+#define SYSCALL_WAITPID 14 +#define SYSCALL_WAITPID 14
+#define SYSCALL_MUNMAP 15
+ +
+#include <stddef.h> +#include <stddef.h>
+#include <stdint.h> +#include <stdint.h>