wok-current annotate linld/stuff/tobzimage.S @ rev 23270

updated oxygen-icons (4.4.2 -> 5.68.0)
author Hans-G?nter Theisgen
date Sat Mar 28 13:40:00 2020 +0100 (2020-03-28)
parents 58452392e881
children
rev   line source
pascal@19206 1
pascal@19203 2 #define REALMODE_SWITCH
pascal@19203 3 #define SHUTDOWNDOS
pascal@19206 4 #define ELKS_SUPPORT
pascal@19206 5 #define LINUX001_SUPPORT
pascal@19203 6
pascal@18228 7 .code16
pascal@18228 8 .org 0
pascal@18228 9
pascal@19203 10 #define CODE32_START 0x100000
pascal@18228 11 jmp start
pascal@18228 12 .ascii "HdrS"
pascal@18228 13 .word 0x200 # version
pascal@18228 14 .long 0 # realmode_swtch
pascal@18228 15 .word 0x1000 # start_sys_seg
pascal@18228 16 .word kernel_version
pascal@18228 17 .byte 0 # type of loader
pascal@18228 18 .byte 1 # loadflags
pascal@18228 19 .word 0x8000 # setup_move_size
pascal@19203 20 .long CODE32_START # code32_start
pascal@18228 21 .long 0 # ramdisk_image
pascal@18228 22 .long 0 # ramdisk_size
pascal@18228 23 .long 0 # bootsect_kludge
pascal@18228 24 .word 0 # heap_end_ptr 2.01+, patched by bootloader
pascal@19203 25
pascal@18228 26 start:
pascal@18228 27 pushf
pascal@18228 28 pushw %cs
pascal@18228 29 pushw $0
pascal@18228 30 pushaw
pascal@19203 31 xorw %di, %di
pascal@19203 32 .byte 0x66, 0xC7, 0x05 # movl $?, (%di)
pascal@18229 33 rep
pascal@18229 34 movsw
pascal@18229 35 popaw
pascal@19206 36 doiret:
pascal@18229 37 iret
pascal@19203 38 pushw %ds
pascal@18228 39 pushw %di
pascal@19203 40 #ifdef REALMODE_SWITCH
pascal@19203 41 movw $0x0208, %si
pascal@19203 42 lodsw
pascal@19203 43 orw (%si), %ax
pascal@19203 44 jz norealmode_switch
pascal@19203 45 lcallw *-2(%si)
pascal@19203 46 norealmode_switch:
pascal@19203 47 #endif
pascal@19203 48
pascal@19203 49 #ifdef SHUTDOWNDOS
pascal@19203 50 xorw %si, %si
pascal@19203 51 movw %si, %ds # %ds = 0
pascal@19203 52 pushl 4(%si)
pascal@19206 53 movw %sp, %cs:loadsp19+1(%si)
pascal@19206 54 cmpb $0xF0, 7(%si)
pascal@19203 55 jnb notdos
pascal@19203 56 movw $step19, 4(%si)
pascal@19203 57 movw %cs, 6(%si)
pascal@19203 58 pushfw
pascal@19203 59 popw %ax
pascal@19203 60 incb %ah # set TF
pascal@19203 61 pushw %ax
pascal@19203 62 popfw
pascal@19203 63 ljmp *4*0x19(%si)
pascal@19203 64 step19:
pascal@19203 65 pushw %si
pascal@19203 66 pushw %ds
pascal@19203 67 movw %sp, %si
pascal@19203 68 ldsw %ss:4(%si), %si
pascal@19203 69 cmpw $0x19CD, (%si)
pascal@19203 70 popw %ds
pascal@19203 71 popw %si
pascal@19206 72 jne doiret
pascal@19203 73 xorw %si, %si
pascal@19203 74 mov %si, %ds
pascal@19203 75 notdos:
pascal@19203 76 loadsp19:
pascal@19206 77 movw $0, %sp
pascal@19203 78 popl 4(%si)
pascal@19203 79 pushw %ss
pascal@19203 80 popw %ds
pascal@19206 81 #else
pascal@19206 82 xorw %si, %si
pascal@19203 83 #endif
pascal@19206 84 #if defined(ELKS_SUPPORT) || defined(LINUX001_SUPPORT)
pascal@19206 85 movw %sp, %bx
pascal@19206 86 #endif
pascal@18228 87 movw $9, %cx
pascal@18228 88 z1:
pascal@19203 89 pushw %si # 0000 0000 0000 0000 0000 0000 0000 0000 0000
pascal@18228 90 loop z1
pascal@18228 91 movw $0x9301, %ax
pascal@19203 92 cwd
pascal@19203 93 pushw %ax # 9301
pascal@19206 94 pushw %si # 0000
pascal@19203 95 pushw %dx # FFFF
pascal@19206 96 pushw %si # 0000
pascal@18228 97 movb 0x216, %al
pascal@19203 98 pushw %ax # 93xx
pascal@19206 99 pushw %si # 0000
pascal@19203 100 pushw %dx # FFFF
pascal@18228 101 movb $8, %cl
pascal@18228 102 z2:
pascal@19203 103 pushw %si # 0000 0000 0000 0000 0000 0000 0000 0000
pascal@18228 104 loop z2
pascal@19203 105 movw $0x200, %di
pascal@18228 106 movw -12(%di), %dx
pascal@19203 107 pushw %ss
pascal@19203 108 popw %es
pascal@19203 109 movw %sp, %si
pascal@18228 110 mvlp:
pascal@18228 111 movw $0x8000, %cx
pascal@18228 112 movb $0x87, %ah
pascal@18228 113 int $0x15
pascal@18228 114 incw 20(%si)
pascal@18228 115 incw 28(%si)
pascal@19208 116 subw $0x1000, %dx
pascal@18228 117 ja mvlp
pascal@19203 118 addw $48, %sp
pascal@19206 119 #ifdef ELKS_SUPPORT
pascal@19206 120 //cmpl $0x534B4C45, -26(%di)
pascal@19208 121 movw $0x100, %cx
pascal@19206 122 elks_patch:
pascal@19206 123 jmp notelks
pascal@19206 124 movb %ch, 23(%bx)
pascal@19206 125 movw %cx, %es
pascal@19206 126 pushw %di
pascal@19206 127 xorw %di, %di
pascal@19206 128 xorw %si, %si
pascal@19206 129 movb $0x6, %ch
pascal@19206 130 rep
pascal@19206 131 movsw
pascal@19206 132 popw %di
pascal@19206 133 pushw %es
pascal@19206 134 popw %ds
pascal@19206 135 notelks:
pascal@19206 136 #endif
pascal@19206 137 movw $0x400, %si
pascal@19203 138 decb -15(%di)
pascal@19206 139 #ifdef LINUX001_SUPPORT
pascal@19206 140 //cmpw $0x3AE8, 0x3F(%si)
pascal@19206 141 linux001_patch:
pascal@19206 142 jmp notlnx001
pascal@19206 143 movb $0x42, (%bx)
pascal@19206 144 xorw %di, %di
pascal@19208 145 # ifndef ELKS_SUPPORT
pascal@19206 146 movw $0x100, %cx
pascal@19208 147 # endif
pascal@19206 148 rep
pascal@19206 149 movsw
pascal@19206 150 notlnx001:
pascal@19206 151 #endif
pascal@19208 152 movb -15(%di), %ch
pascal@18228 153 lret
pascal@19203 154 endcode:
pascal@19203 155
pascal@19203 156 .org 256
pascal@18228 157 kernel_version:
pascal@18228 158 .asciz "zImage"
pascal@18228 159 .org 512
pascal@18228 160 oldsetup:
pascal@18228 161
pascal@19203 162
pascal@19203 163