change errno behavior to be handle by userspace

Author: clemdiep

so3/arch/arm32/context.S

@@ -66,11 +66,9 @@ __enable_vfp:
 @ Get the additional arguments linked to the syscall.
 @ The ABI convention is described in crt0.S of the libc.
 @ r7 contains the syscall number
-@ r10 contains the address of the errno variable
 __get_syscall_args_ext:
 
 	str		r7, [r0]
-	str		r10, [r1]
 
 	mov 	pc, lr
 
@@ -275,8 +273,6 @@ ENTRY(__root_proc)
 	adr r1, .LC_welcome
 	mov r2, #welcome_len
 	mov r7, #SYSCALL_WRITE
-	@ No errno
-	mov r10, #0
 	@ Invoke the syscall - kernel side
 	svc	0
 
@@ -285,8 +281,6 @@ ENTRY(__root_proc)
 	@ No args
 	mov r1, #0
 	mov r2, #0
-	@ No errno
-	mov r10, #0
 
 	mov	r7, #SYSCALL_EXECVE
 

so3/arch/arm64/context.S

@@ -176,12 +176,10 @@ ENTRY(cpu_do_idle)
 // Get the additional arguments linked to the syscall.
 // The ABI convention is described in crt0.S of the libc.
 // x8 contains the syscall number
-// x9 contains the address of the errno variable
 
 __get_syscall_args_ext:
 
 	str	x8, [x0]
-	str	x9, [x1]
 
 	ret
 
@@ -297,9 +295,6 @@ ENTRY(__root_proc)
 	mov 	x2, welcome_len
 	mov 	x8, #SYSCALL_WRITE
 
-	// No errno
-	mov 	x9, xzr
-
 	// Invoke the syscall - kernel side
 	svc	0
 
@@ -311,9 +306,6 @@ ENTRY(__root_proc)
 	mov 	x1, xzr
 	mov 	x2, xzr
 
-	// No errno
-	mov 	x9, xzr
-
 	mov	x8, #SYSCALL_EXECVE
 
 	svc 	0
@@ -325,9 +317,6 @@ ENTRY(__root_proc)
 	mov 	x2, noshell_len
 	mov 	x8, #SYSCALL_WRITE
 
-	// No errno
-	mov 	x9, xzr
-
 	svc 	0
 
 	b 	kernel_panic

so3/arch/arm64/traps.c

@@ -18,7 +18,6 @@
 
 #include <common.h>
 #include <psci.h>
-#include <errno.h>
 #include <smp.h>
 #include <mmio.h>
 

so3/avz/kernel/ME_build.c

@@ -20,7 +20,6 @@
 #include <percpu.h>
 #include <ctype.h>
 #include <console.h>
-#include <errno.h>
 #include <heap.h>
 
 #include <avz/sched.h>

so3/avz/kernel/agency_build.c

@@ -20,7 +20,6 @@
 #include <percpu.h>
 #include <ctype.h>
 #include <console.h>
-#include <errno.h>
 #include <memory.h>
 #include <heap.h>
 

so3/avz/kernel/console.c

@@ -18,7 +18,6 @@
 
 #include <common.h>
 #include <stdarg.h>
-#include <errno.h>
 #include <spinlock.h>
 #include <console.h>
 #include <serial.h>

so3/avz/kernel/domain.c

@@ -20,7 +20,6 @@
 #include <stdarg.h>
 #include <serial.h>
 #include <console.h>
-#include <errno.h>
 #include <softirq.h>
 #include <memory.h>
 #include <heap.h>

so3/avz/kernel/image-fit.c

@@ -12,7 +12,6 @@
 
 #include <string.h>
 #include <console.h>
-#include <errno.h>
 
 #include <asm/byteorder.h>
 

so3/avz/kernel/sched_flip.c

@@ -23,7 +23,6 @@
 #include <common.h>
 #include <timer.h>
 #include <softirq.h>
-#include <errno.h>
 
 #include <avz/sched.h>
 #include <avz/sched-if.h>

so3/avz/kernel/schedule.c

@@ -20,7 +20,6 @@
 #include <timer.h>
 #include <softirq.h>
 #include <spinlock.h>
-#include <errno.h>
 
 #include <device/irq.h>