working on process/asm_interface.S

kernel/core/interrupt/exception/isr_launcher.S

@@ -28,6 +28,13 @@
 .set SREG_SS_OLD, 0xb8
 //--------------------------
 
+//when rsp points to handler_addr
+//rsp+0x8=errcode
+//rsp+0x10=rip
+//rsp+0x18=cs
+//rsp+0x20=rflags
+//rsp+0x28=old_rsp
+//rsp+0x30=ss
 
 IsrLauncher:
 	//write the handler address into stack

kernel/core/process/asm_interface.S

@@ -4,10 +4,13 @@
 //iretq to jump to the new context
 
 .global switch_context
-.extern 
-.extern 
+.extern cur_regstruct_ptr
+
 switch_context:
+	//not sure whether to fill in the errorcode or not, if error code is needed, restore the next line
+	//pushq $0
     xchgq (%rsp), %rax
+	movq (cur_regstruct_ptr), %rax
 /*
 	pushq %rax
 	pushq %rbx

kernel/core/process/context_switch.c

@@ -81,7 +81,7 @@ volatile struct RegisterSet *cur_regstruct_ptr;
 void InitScheduler() {
     //load the first context
     current_context=&initproc_pcb;
-    cur_regstruct_ptr=&initproc_pcb.regs
+    cur_regstruct_ptr=&initproc_pcb.regs;
 
     //create and set "init" process (pid 0)
 

kernel/stdlib/regstruct.h

@@ -1,9 +1,55 @@
 #ifndef __REGSTRUCT_H__
 #define __REGSTRUCT_H__
 
-//both two structs are not corret
+/*
+struct memory layout, for example:
+struct {
+	//lower part of memory
+	int a;	//offset: 0
+	int b;	//offset: 4
+	int c;	//offset: 8
+	//higher part of memory
+}
 
 
+
+
+*/
+
+
+
+//the struct IntRegisterSet isn't tested, not sure whether it's correct or not
+/*
+
+
+	//write the handler address into stack
+	xchgq %rax, (%rsp) //the error handler is filled with correct value (by caller, using leaq instruction) , and the old rax is back!
+
+	pushq %rax
+	pushq %rbx
+	pushq %rcx
+	pushq %rdx
+	pushq %rsi
+	pushq %rdi
+	pushq %rbp
+	pushq %r8
+	pushq %r9
+	pushq %r10
+	pushq %r11
+	pushq %r12
+	pushq %r13
+	pushq %r14
+	pushq %r15
+	//pushq %ds is invalid
+	movq %ds, %rax
+	pushq %rax
+	//pushq %es is invalid
+	movq %es, %rax
+	pushq %rax
+
+
+*/
+
 struct IntRegisterSet {
 	unsigned long es;
 	unsigned long ds;
@@ -31,7 +77,10 @@ struct IntRegisterSet {
 	unsigned long ss;
 } __attribute__ ((packed));
 
+
+
 struct RegisterSet {
+	//low memory
     unsigned long gs;
     unsigned long fs;
 	unsigned long es;
@@ -56,6 +105,12 @@ struct RegisterSet {
 	unsigned long rflags;
 	unsigned long rsp;
 	unsigned long ss;
+	//high memory
 } __attribute__ ((packed));
 
+
+
+
+typedef struct Register_set ctxt_regs;
+
 #endif

run/log/bochs.log

@@ -36,61 +36,61 @@
 00000000000i[      ]   VGA extension support: vbe cirrus voodoo
 00000000000i[IMG   ] Disk image modules
 00000000000i[IMG   ]   flat concat sparse dll growing undoable volatile vbox
-00000000000i[IMG   ]   vmware3 vmware4 vvfat vpc
+00000000000i[IMG   ]   vvfat vmware4 vmware3 vpc
 00000000000i[NETCTL] Networking modules
-00000000000i[NETCTL]   null slirp linux tuntap vnet socket vde
+00000000000i[NETCTL]   null tuntap vnet vde linux socket slirp
 00000000000i[SNDCTL] Sound drivers
 00000000000i[SNDCTL]   dummy oss file alsa sdl
 00000000000i[USBCTL] Pluggable USB devices
-00000000000i[USBCTL]   floppy disk cdrom mouse tablet keypad keyboard hub
-00000000000i[USBCTL]   printer
-00000000000i[MEM0  ] allocated memory at 0x7fd8d5e4f010. after alignment, vector=0x7fd8d5e50000
+00000000000i[USBCTL]   printer mouse tablet keypad keyboard hub disk cdrom
+00000000000i[USBCTL]   floppy
+00000000000i[MEM0  ] allocated memory at 0x7fbfee5ea010. after alignment, vector=0x7fbfee5eb000
 00000000000i[MEM0  ] 32.00MB
 00000000000i[MEM0  ] mem block size = 0x00020000, blocks=256
 00000000000i[MEM0  ] rom at 0xfffe0000/131072 ('./run/bin/BIOS-bochs-latest')
 00000000000i[CPU0  ] WARNING: 3DNow! is not implemented yet !
 00000000000i[DEV   ] will paste characters every 100 iodev timer ticks
-00000000000i[      ] lt_dlhandle is 0x559d270262b0
+00000000000i[      ] lt_dlhandle is 0x5571e7d42940
 00000000000i[PLUGIN] loaded plugin libbx_soundalsa.so
 00000000000i[WAVOUT] ALSA: opened default PCM output device
-00000000000i[WAVOUT] changed sample rate to 44101
-00000000000i[      ] lt_dlhandle is 0x559d270ad120
+00000000000i[WAVOUT] changed sample rate to 44099
+00000000000i[      ] lt_dlhandle is 0x5571e7dbfd10
 00000000000i[PLUGIN] loaded plugin libbx_pci.so
-00000000000i[      ] lt_dlhandle is 0x559d27065ca0
+00000000000i[      ] lt_dlhandle is 0x5571e7dc1a80
 00000000000i[PLUGIN] loaded plugin libbx_pci2isa.so
-00000000000i[      ] lt_dlhandle is 0x559d270af800
+00000000000i[      ] lt_dlhandle is 0x5571e7dc24a0
 00000000000i[PLUGIN] loaded plugin libbx_usb_uhci.so
-00000000000i[      ] lt_dlhandle is 0x559d270b1710
+00000000000i[      ] lt_dlhandle is 0x5571e7dc4370
 00000000000i[PLUGIN] loaded plugin libbx_acpi.so
-00000000000i[      ] lt_dlhandle is 0x559d270b2220
+00000000000i[      ] lt_dlhandle is 0x5571e7dc4e80
 00000000000i[PLUGIN] loaded plugin libbx_hpet.so
-00000000000i[      ] lt_dlhandle is 0x559d270b30b0
+00000000000i[      ] lt_dlhandle is 0x5571e7dc5d10
 00000000000i[PLUGIN] loaded plugin libbx_cmos.so
-00000000000i[      ] lt_dlhandle is 0x559d270b38d0
+00000000000i[      ] lt_dlhandle is 0x5571e7dc6530
 00000000000i[PLUGIN] loaded plugin libbx_dma.so
-00000000000i[      ] lt_dlhandle is 0x559d270b4250
+00000000000i[      ] lt_dlhandle is 0x5571e7dc6d50
 00000000000i[PLUGIN] loaded plugin libbx_pic.so
-00000000000i[      ] lt_dlhandle is 0x559d270b4a90
+00000000000i[      ] lt_dlhandle is 0x5571e7dc7590
 00000000000i[PLUGIN] loaded plugin libbx_pit.so
-00000000000i[      ] lt_dlhandle is 0x559d270b5450
+00000000000i[      ] lt_dlhandle is 0x5571e7dc7f50
 00000000000i[PLUGIN] loaded plugin libbx_vga.so
-00000000000i[      ] lt_dlhandle is 0x559d270b5ce0
+00000000000i[      ] lt_dlhandle is 0x5571e7dc87e0
 00000000000i[PLUGIN] loaded plugin libbx_floppy.so
-00000000000i[      ] lt_dlhandle is 0x559d270b68a0
+00000000000i[      ] lt_dlhandle is 0x5571e7dc93a0
 00000000000i[PLUGIN] loaded plugin libbx_ioapic.so
-00000000000i[      ] lt_dlhandle is 0x559d270b71e0
+00000000000i[      ] lt_dlhandle is 0x5571e7dc9bc0
 00000000000i[PLUGIN] loaded plugin libbx_keyboard.so
-00000000000i[      ] lt_dlhandle is 0x559d270b7b00
+00000000000i[      ] lt_dlhandle is 0x5571e7dca4e0
 00000000000i[PLUGIN] loaded plugin libbx_harddrv.so
-00000000000i[      ] lt_dlhandle is 0x559d270b9bf0
+00000000000i[      ] lt_dlhandle is 0x5571e7dcc5d0
 00000000000i[PLUGIN] loaded plugin libbx_pci_ide.so
 00000000000i[PLUGIN] init_dev of 'pci' plugin device by virtual method
 00000000000i[DEV   ] i440FX PMC present at device 0, function 0
 00000000000i[PLUGIN] init_dev of 'pci2isa' plugin device by virtual method
 00000000000i[DEV   ] PIIX3 PCI-to-ISA bridge present at device 1, function 0
 00000000000i[PLUGIN] init_dev of 'cmos' plugin device by virtual method
 00000000000i[CMOS  ] Using local time for initial clock
-00000000000i[CMOS  ] Setting initial clock to: Tue Jun  6 07:20:44 2023 (time0=1686007244)
+00000000000i[CMOS  ] Setting initial clock to: Wed Jun  7 18:59:29 2023 (time0=1686135569)
 00000000000i[PLUGIN] init_dev of 'dma' plugin device by virtual method
 00000000000i[DMA   ] channel 4 used by cascade
 00000000000i[PLUGIN] init_dev of 'pic' plugin device by virtual method
@@ -126,16 +126,16 @@
 00000000000i[HD    ] translation on ata0-0 set to 'none'
 00000000000i[PLUGIN] init_dev of 'pci_ide' plugin device by virtual method
 00000000000i[DEV   ] PIIX3 PCI IDE controller present at device 1, function 1
-00000000000i[PLUGIN] init_dev of 'serial' plugin device by virtual method
-00000000000i[SER   ] com1 at 0x03f8 irq 4 (mode: null)
-00000000000i[PLUGIN] init_dev of 'biosdev' plugin device by virtual method
+00000000000i[PLUGIN] init_dev of 'speaker' plugin device by virtual method
+00000000000i[PCSPK ] Using lowlevel sound support for output
 00000000000i[PLUGIN] init_dev of 'extfpuirq' plugin device by virtual method
-00000000000i[PLUGIN] init_dev of 'iodebug' plugin device by virtual method
 00000000000i[PLUGIN] init_dev of 'parallel' plugin device by virtual method
 00000000000i[PAR   ] parallel port 1 at 0x0378 irq 7
-00000000000i[PLUGIN] init_dev of 'speaker' plugin device by virtual method
-00000000000i[PCSPK ] Using lowlevel sound support for output
 00000000000i[PLUGIN] init_dev of 'unmapped' plugin device by virtual method
+00000000000i[PLUGIN] init_dev of 'serial' plugin device by virtual method
+00000000000i[SER   ] com1 at 0x03f8 irq 4 (mode: null)
+00000000000i[PLUGIN] init_dev of 'biosdev' plugin device by virtual method
+00000000000i[PLUGIN] init_dev of 'iodebug' plugin device by virtual method
 00000000000i[PLUGIN] init_dev of 'gameport' plugin device by virtual method
 00000000000i[PLUGIN] init_dev of 'usb_uhci' plugin device by virtual method
 00000000000i[DEV   ] USB UHCI present at device 1, function 2
@@ -148,13 +148,13 @@
 00000000000i[PLUGIN] register state of 'pit' plugin device by virtual method
 00000000000i[PLUGIN] register state of 'vga' plugin device by virtual method
 00000000000i[PLUGIN] register state of 'floppy' plugin device by virtual method
-00000000000i[PLUGIN] register state of 'serial' plugin device by virtual method
-00000000000i[PLUGIN] register state of 'biosdev' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'speaker' plugin device by virtual method
 00000000000i[PLUGIN] register state of 'extfpuirq' plugin device by virtual method
-00000000000i[PLUGIN] register state of 'iodebug' plugin device by virtual method
 00000000000i[PLUGIN] register state of 'parallel' plugin device by virtual method
-00000000000i[PLUGIN] register state of 'speaker' plugin device by virtual method
 00000000000i[PLUGIN] register state of 'unmapped' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'serial' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'biosdev' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'iodebug' plugin device by virtual method
 00000000000i[PLUGIN] register state of 'gameport' plugin device by virtual method
 00000000000i[PLUGIN] register state of 'usb_uhci' plugin device by virtual method
 00000000000i[PLUGIN] register state of 'acpi' plugin device by virtual method
@@ -224,13 +224,13 @@
 00000000000i[PLUGIN] reset of 'keyboard' plugin device by virtual method
 00000000000i[PLUGIN] reset of 'harddrv' plugin device by virtual method
 00000000000i[PLUGIN] reset of 'pci_ide' plugin device by virtual method
-00000000000i[PLUGIN] reset of 'serial' plugin device by virtual method
-00000000000i[PLUGIN] reset of 'biosdev' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'speaker' plugin device by virtual method
 00000000000i[PLUGIN] reset of 'extfpuirq' plugin device by virtual method
-00000000000i[PLUGIN] reset of 'iodebug' plugin device by virtual method
 00000000000i[PLUGIN] reset of 'parallel' plugin device by virtual method
-00000000000i[PLUGIN] reset of 'speaker' plugin device by virtual method
 00000000000i[PLUGIN] reset of 'unmapped' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'serial' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'biosdev' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'iodebug' plugin device by virtual method
 00000000000i[PLUGIN] reset of 'gameport' plugin device by virtual method
 00000000000i[PLUGIN] reset of 'usb_uhci' plugin device by virtual method
 00000000000i[      ] Using debugger log file ./run/log/debug.log
@@ -243,7 +243,7 @@
 00000323240i[BIOS  ] ram_end=32MB
 00000363790i[BIOS  ] Found 1 cpu(s)
 00000377994i[BIOS  ] bios_table_addr: 0x000fa498 end=0x000fcc00
-00000602540i[XGUI  ] charmap update. Font is 9 x 16
+00000624372i[XGUI  ] charmap update. Font is 9 x 16
 00000705789i[PCI   ] i440FX PMC write to PAM register 59 (TLB Flush)
 00001033718i[P2ISA ] PCI IRQ routing: PIRQA# set to 0x0b
 00001033737i[P2ISA ] PCI IRQ routing: PIRQB# set to 0x09
@@ -281,37 +281,10 @@
 00001534412i[BXVGA ] VBE known Display Interface b0c5
 00001537055i[VBIOS ] VBE Bios $Id: vbe.c 228 2020-01-02 23:09:02Z vruppert $
 00001881381i[BIOS  ] ata0-0: PCHS=81/16/63 translation=none LCHS=81/16/63
-00002377308i[XGUI  ] charmap update. Font is 9 x 16
+00005141896i[XGUI  ] charmap update. Font is 9 x 16
 00005758587i[BIOS  ] IDE time out
 00017844207i[BIOS  ] Booting from 0000:7c00
 00018006415i[BXVGA ] VBE set bpp (32)
 00018006437i[BXVGA ] VBE set xres (1440)
 00018006476i[BXVGA ] VBE set yres (900)
 00018006514i[BXVGA ] VBE enabling x 1440, y 900, bpp 32, 5184000 bytes visible
-00018818613i[CPU0  ] CPU is in long mode (active)
-00018818613i[CPU0  ] CS.mode = 64 bit
-00018818613i[CPU0  ] SS.mode = 64 bit
-00018818613i[CPU0  ] EFER   = 0x00000500
-00018818613i[CPU0  ] | RAX=ffff800000007b68  RBX=ffff80000010f690
-00018818613i[CPU0  ] | RCX=0000000000000000  RDX=ffff8000001040ea
-00018818613i[CPU0  ] | RSP=ffff800000007a40  RBP=ffff800000007b30
-00018818613i[CPU0  ] | RSI=0000000000000000  RDI=ffff800000007b40
-00018818613i[CPU0  ] |  R8=ffff800000109773   R9=0000000000000001
-00018818613i[CPU0  ] | R10=000000000000000e  R11=000000000000b58e
-00018818613i[CPU0  ] | R12=0000000000000000  R13=0000000000000000
-00018818613i[CPU0  ] | R14=0000000000000000  R15=ffff80000010f690
-00018818613i[CPU0  ] | IOPL=0 ID vip vif ac vm rf nt of df if tf SF zf af pf cf
-00018818613i[CPU0  ] | SEG sltr(index|ti|rpl)     base    limit G D
-00018818613i[CPU0  ] |  CS:0008( 0001| 0|  0) 00000000 00000000 0 0
-00018818613i[CPU0  ] |  DS:0010( 0002| 0|  0) 00000000 00000000 0 0
-00018818613i[CPU0  ] |  SS:0010( 0002| 0|  0) 00000000 00000000 0 0
-00018818613i[CPU0  ] |  ES:0010( 0002| 0|  0) 00000000 00000000 0 0
-00018818613i[CPU0  ] |  FS:0010( 0002| 0|  0) 00000000 00000000 0 0
-00018818613i[CPU0  ] |  GS:0010( 0002| 0|  0) 00000000 00000000 0 0
-00018818613i[CPU0  ] |  MSR_FS_BASE:0000000000000000
-00018818613i[CPU0  ] |  MSR_GS_BASE:0000000000000000
-00018818613i[CPU0  ] | RIP=ffff80000010418b (ffff80000010418b)
-00018818613i[CPU0  ] | CR0=0xe0000011 CR2=0x0000000000000000
-00018818613i[CPU0  ] | CR3=0x0000000000101000 CR4=0x00000020
-00018818613i[CMOS  ] Last time is 1686007248 (Tue Jun  6 07:20:48 2023)
-00018818613i[XGUI  ] Exit