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-rw-r--r--src/sys/arch/amd64/cpu/cpu_conf.c3
-rw-r--r--src/sys/arch/amd64/os/os_panic.c6
-rw-r--r--src/sys/arch/amd64/simd.S75
-rw-r--r--src/sys/include/compat/unix/syscall.h6
-rw-r--r--src/sys/include/os/ucred.h61
-rw-r--r--src/sys/include/sys/mman.h5
-rw-r--r--src/sys/include/sys/proc.h2
-rw-r--r--src/sys/include/sys/syscall.h2
-rw-r--r--src/sys/include/sys/ucred.h48
-rw-r--r--src/sys/include/vm/map.h6
-rw-r--r--src/sys/os/os_proc.c8
-rw-r--r--src/sys/os/os_ucred.c90
-rw-r--r--src/sys/vm/vm_map.c61
13 files changed, 368 insertions, 5 deletions
diff --git a/src/sys/arch/amd64/cpu/cpu_conf.c b/src/sys/arch/amd64/cpu/cpu_conf.c
index da2d747..8a3b4e6 100644
--- a/src/sys/arch/amd64/cpu/cpu_conf.c
+++ b/src/sys/arch/amd64/cpu/cpu_conf.c
@@ -44,7 +44,9 @@
extern void syscall_isr(void);
extern void core_halt_isr(void);
+
void core_halt_handler(void);
+int simd_init(void);
void
core_halt_handler(void)
@@ -193,6 +195,7 @@ cpu_conf(struct pcore *pcore)
pcore->self = pcore;
wrmsr(IA32_GS_BASE, (uintptr_t)pcore);
+ simd_init();
init_vectors();
idt_load();
cpu_identify(mdcore);
diff --git a/src/sys/arch/amd64/os/os_panic.c b/src/sys/arch/amd64/os/os_panic.c
index 88e962e..996ba13 100644
--- a/src/sys/arch/amd64/os/os_panic.c
+++ b/src/sys/arch/amd64/os/os_panic.c
@@ -37,12 +37,16 @@ __dead
void panic(const char *fmt, ...)
{
static va_list ap;
+ struct pcore *core = this_core();
+ uint32_t core_id;
cpu_halt_others();
va_start(ap, fmt);
- printf("lunos panic: ");
+ core_id = (core == NULL) ? 0xFF : core->id;
+ printf("lunos panic[cpu %d]: ", core_id);
vprintf(fmt, &ap);
+
for (;;) {
md_intoff();
md_halt();
diff --git a/src/sys/arch/amd64/simd.S b/src/sys/arch/amd64/simd.S
new file mode 100644
index 0000000..f0673f9
--- /dev/null
+++ b/src/sys/arch/amd64/simd.S
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+ .text
+ .globl simd_init
+simd_init:
+ /*
+ * Enable SIMD, if SSE and AVX is supported,
+ * a value of zero is returned. If SSE is
+ * supported yet AVX is not, a value of one
+ * is returned. However, if none are supported,
+ * this routine returns -1.
+ */
+
+ // Do we support SSE?
+ mov $1, %eax
+ cpuid
+ bt $25, %edx
+ jnc .sse_not_sup
+
+ mov %cr0, %rax // Old CR0 -> EAX
+ and $0xFFFB, %ax // Disable co-processor emulation
+ or $0x02, %ax // Enable co-processor monitoring
+ mov %rax, %cr0 // Update CR0 with new flags
+
+ mov %cr4, %rax // Old CR4 -> EAX
+ or $0x200, %ax // Enable FXSAVE/FXRSTOR
+ or $0x400, %ax // Enable SIMD FP exceptions
+ mov %rax, %cr4 // Update CR4 with new flags
+
+ mov $1, %eax // LEAF 1
+ cpuid // Bit 28 of ECX indicates AVX support
+ mov $3, %eax // We need to check two bits
+ shl $27, %eax // Which are ECX.OSXSAVE and ECX.AVX
+ test %eax, %ecx // Are XSAVE and AVX supported?
+ jnc .avx_not_sup // Nope, just continue
+
+ // Enable AVX
+ xor %rcx, %rcx // Select XCR0
+ xgetbv // Load extended control register
+ or $0x07, %eax // Set AVX + SSE bits
+ xsetbv // Store new flags
+ xor %rax, %rax // Everything is good
+ retq // Return back to caller (RETURN)
+.sse_not_sup:
+ mov $-1, %rax
+ retq
+.avx_not_sup:
+ mov $1, %rax
+ retq
diff --git a/src/sys/include/compat/unix/syscall.h b/src/sys/include/compat/unix/syscall.h
index 38419af..5df3c51 100644
--- a/src/sys/include/compat/unix/syscall.h
+++ b/src/sys/include/compat/unix/syscall.h
@@ -35,9 +35,11 @@
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/syscall.h>
+#include <os/ucred.h>
#include <os/iotap.h>
#include <os/reboot.h>
#include <dms/dms.h>
+#include <vm/map.h>
/*
* Exit the current process - exit(2) syscall
@@ -98,7 +100,9 @@ scret_t(*g_unix_sctab[])(struct syscall_args *) = {
[SYS_close] = sys_close,
[SYS_lseek] = sys_lseek,
[SYS_socket] = sys_socket,
- [SYS_listen] = sys_listen
+ [SYS_listen] = sys_listen,
+ [SYS_seteuid] = sys_seteuid,
+ [SYS_mmap] = sys_mmap
};
#endif /* !_NEED_UNIX_SCTAB */
diff --git a/src/sys/include/os/ucred.h b/src/sys/include/os/ucred.h
new file mode 100644
index 0000000..6e3e4b4
--- /dev/null
+++ b/src/sys/include/os/ucred.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _OS_UCRED_H_
+#define _OS_UCRED_H_ 1
+
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <sys/ucred.h>
+#include <sys/proc.h>
+
+/*
+ * Initialize user credientials
+ *
+ * @proc: Current process
+ * @cred: credientials to initialize
+ *
+ * XXX: 'proc' being NULL drops the creds to root
+ *
+ * Returns zero on success, otherwise a less
+ * than zero value on failure.
+ */
+int ucred_init(struct proc *proc, struct ucred *cred);
+
+/*
+ * Set effective user ID
+ */
+int seteuid(uid_t euid);
+
+/*
+ * Set EUID system call
+ */
+scret_t sys_seteuid(struct syscall_args *scargs);
+
+#endif /* !_OS_UCRED_H_ */
diff --git a/src/sys/include/sys/mman.h b/src/sys/include/sys/mman.h
index 7ae1ed2..b688fdd 100644
--- a/src/sys/include/sys/mman.h
+++ b/src/sys/include/sys/mman.h
@@ -39,4 +39,9 @@
#define PROT_USER BIT(3)
#endif /* _KERNEL */
+/*
+ * Map memory pages
+ */
+void *mmap(void *addr, size_t len, int prot, int flags, int fildes, off_t off);
+
#endif /* !_SYS_MMAN_H_ */
diff --git a/src/sys/include/sys/proc.h b/src/sys/include/sys/proc.h
index a547233..b188d50 100644
--- a/src/sys/include/sys/proc.h
+++ b/src/sys/include/sys/proc.h
@@ -30,6 +30,7 @@
#ifndef _SYS_PROC_H_
#define _SYS_PROC_H_
+#include <sys/ucred.h>
#include <sys/types.h>
#include <sys/syscall.h>
#include <sys/cdefs.h>
@@ -91,6 +92,7 @@ struct proc {
struct penv_blk *envblk;
struct ptrbox *envblk_box;
struct proc *parent;
+ struct ucred cred;
mac_level_t level;
struct spinlock maplist_lock;
sigtab_t sigtab;
diff --git a/src/sys/include/sys/syscall.h b/src/sys/include/sys/syscall.h
index 2ca712f..ee6ef48 100644
--- a/src/sys/include/sys/syscall.h
+++ b/src/sys/include/sys/syscall.h
@@ -61,6 +61,8 @@
#define SYS_lseek 0x10 /* seek to end of file */
#define SYS_socket 0x11 /* get a socket fd */
#define SYS_listen 0x12 /* listen on a socket */
+#define SYS_seteuid 0x13 /* set effective UID */
+#define SYS_mmap 0x14 /* map a virtual address */
typedef __ssize_t scret_t;
typedef __ssize_t scarg_t;
diff --git a/src/sys/include/sys/ucred.h b/src/sys/include/sys/ucred.h
new file mode 100644
index 0000000..ab44b6c
--- /dev/null
+++ b/src/sys/include/sys/ucred.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _SYS_UCRED_H_
+#define _SYS_UCRED_H_ 1
+
+#include <sys/types.h>
+
+/*
+ * Represents current user credientials
+ *
+ * @euid: Effective user ID
+ * @ruid: Real user ID
+ * @suid: Saved UID
+ */
+struct ucred {
+ uid_t euid;
+ uid_t ruid;
+ uid_t suid;
+};
+
+#endif /* !_SYS_UCRED_H_ */
diff --git a/src/sys/include/vm/map.h b/src/sys/include/vm/map.h
index 69d7d73..8183b62 100644
--- a/src/sys/include/vm/map.h
+++ b/src/sys/include/vm/map.h
@@ -31,6 +31,7 @@
#define _VM_MAP_H_ 1
#include <sys/types.h>
+#include <sys/syscall.h>
#include <sys/mman.h>
#include <machine/vas.h> /* standard */
#include <vm/mmu.h>
@@ -52,4 +53,9 @@
*/
int vm_map(struct vm_vas *vas, struct mmu_map *spec, size_t len, int prot);
+/*
+ * POSIX mmap syscall
+ */
+scret_t sys_mmap(struct syscall_args *scargs);
+
#endif /* !_VM_MAP_H_ */
diff --git a/src/sys/os/os_proc.c b/src/sys/os/os_proc.c
index a8f49d7..ef6c04c 100644
--- a/src/sys/os/os_proc.c
+++ b/src/sys/os/os_proc.c
@@ -40,6 +40,7 @@
#include <os/systm.h>
#include <vm/vm.h>
#include <vm/physseg.h>
+#include <os/ucred.h>
#include <os/elfload.h>
#include <os/signal.h>
#include <os/kalloc.h>
@@ -386,9 +387,14 @@ proc_spawn(const char *path, struct penv_blk *envbp)
proc->envblk = envbp;
proc->parent = proc_self();
+ error = ucred_init(proc->parent, &proc->cred);
+ if (error < 0) {
+ kfree(proc);
+ return error;
+ }
+
md_set_ip(proc, elf.entrypoint);
sched_enq(&core->scq, proc);
-
TAILQ_INSERT_TAIL(&procq, proc, lup_link);
return proc->pid;
}
diff --git a/src/sys/os/os_ucred.c b/src/sys/os/os_ucred.c
new file mode 100644
index 0000000..bf46308
--- /dev/null
+++ b/src/sys/os/os_ucred.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/cdefs.h>
+#include <sys/errno.h>
+#include <os/ucred.h>
+#include <os/ucred.h>
+
+int
+ucred_init(struct proc *proc, struct ucred *cred)
+{
+ struct ucred *curcred;
+
+ if (cred == NULL) {
+ return -EINVAL;
+ }
+
+ if (proc != NULL) {
+ curcred = &proc->cred;
+ cred->ruid = curcred->ruid;
+ } else {
+ cred->ruid = 0;
+ }
+
+ cred->euid = cred->ruid;
+ cred->suid = cred->ruid;
+ return 0;
+}
+
+int
+seteuid(uid_t euid)
+{
+ struct proc *self = proc_self();
+ struct ucred *cred;
+ int retval = -EPERM;
+
+ if (__unlikely(self == NULL)) {
+ return -ESRCH;
+ }
+
+ /* Verify against current creds */
+ cred = &self->cred;
+ if (euid == cred->euid || euid == cred->ruid) {
+ cred->euid = euid;
+ retval = 0;
+ } else if (euid == cred->suid || cred->euid == 0) {
+ cred->euid = euid;
+ retval = 0;
+ }
+
+ return retval;
+}
+
+/*
+ * ARG0: EUID
+ */
+scret_t
+sys_seteuid(struct syscall_args *scargs)
+{
+ uid_t euid = SCARG(scargs, int, 0);
+
+ return seteuid(euid);
+}
diff --git a/src/sys/vm/vm_map.c b/src/sys/vm/vm_map.c
index 6748348..1d801af 100644
--- a/src/sys/vm/vm_map.c
+++ b/src/sys/vm/vm_map.c
@@ -30,12 +30,16 @@
#include <sys/types.h>
#include <sys/param.h>
#include <sys/errno.h>
+#include <sys/param.h>
#include <sys/syslog.h>
#include <vm/physseg.h>
#include <vm/mmu.h>
#include <vm/map.h>
#include <vm/vm.h>
+#define MMAP_START 0x6F3C8E0C0000
+#define MMAP_END 0x6F3C90000000
+
/*
* Create a virtual to physical memory
* mapping
@@ -133,7 +137,60 @@ vm_map(struct vm_vas *vas, struct mmu_map *spec, size_t len, int prot)
}
/* Place a guard page at the end */
- spec->va = spec_cpy.va + len;
- __vm_map(vas, spec, DEFAULT_PAGESIZE, 0);
+ spec_cpy.va = spec_cpy.va + len;
+ __vm_map(vas, &spec_cpy, DEFAULT_PAGESIZE, 0);
return 0;
}
+
+void *
+mmap(void *addr, size_t len, int prot, int flags, int fildes, off_t off)
+{
+ struct mmu_map spec;
+ struct vm_vas vas;
+ paddr_t pa;
+ int error;
+
+ /* TODO: Support address allocation */
+ if (len == 0 || addr == NULL) {
+ return NULL;
+ }
+
+ spec.va = (uintptr_t)addr;
+ spec.pa = 0;
+ error = mmu_this_vas(&vas);
+ if (error < 0) {
+ return NULL;
+ }
+
+ /* Create the mapping */
+ error = vm_map(&vas, &spec, len, prot);
+ if (error < 0) {
+ return NULL;
+ }
+
+ return (void *)spec.va;
+}
+
+/*
+ * ARG0: Address
+ * ARG1: Length
+ * ARG2: Protection flags
+ * ARG3: Flags
+ * ARG4: Fildes
+ * ARG5: Offset
+ */
+scret_t
+sys_mmap(struct syscall_args *scargs)
+{
+ void *address = SCARG(scargs, void *, 0);
+ size_t length = SCARG(scargs, size_t, 1);
+ int prot = SCARG(scargs, int, 2);
+
+ prot |= PROT_USER;
+ if (address != NULL) {
+ address = PTR_OFFSET(address, MMAP_START);
+ }
+
+ /* XXX: Should use rest of the args */
+ return (uintptr_t)mmap(address, length, prot, 0, 0, 0);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-10-20 04:11:49 +0000