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Modify CDC and DFU bootloaders so that the various BootloaderAPI components are in unique sections and mapped explicitly - this will ensure the API and signature entries are always linked at the correct explicit address.

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This commit is contained in:
Dean Camera 2012-06-15 16:02:19 +00:00
parent c4ebddd27a
commit 4da2ba9f1c
4 changed files with 93 additions and 71 deletions
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70
Bootloaders/CDC/BootloaderAPITable.S
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@ -28,41 +28,44 @@
this software.
*/
; Bootloader API Jump Table
.section .apitable, "ax"
; Trampolines to actual API implementations if the target address is outside the
; range of a rjmp instruction (can happen with large bootloader sections)
.org 0
BootloaderAPI_ErasePage_Trampoline:
jmp BootloaderAPI_ErasePage
BootloaderAPI_WritePage_Trampoline:
jmp BootloaderAPI_WritePage
BootloaderAPI_FillWord_Trampoline:
jmp BootloaderAPI_FillWord
BootloaderAPI_ReadSignature_Trampoline:
jmp BootloaderAPI_ReadSignature
BootloaderAPI_ReadFuse_Trampoline:
jmp BootloaderAPI_ReadFuse
BootloaderAPI_ReadLock_Trampoline:
jmp BootloaderAPI_ReadLock
BootloaderAPI_WriteLock_Trampoline:
jmp BootloaderAPI_WriteLock
BootloaderAPU_UNUSED1:
ret
BootloaderAPU_UNUSED2:
ret
BootloaderAPU_UNUSED3:
ret
BootloaderAPU_UNUSED4:
ret
BootloaderAPU_UNUSED5:
ret
.section .apitable_trampolines, "ax"
.global BootloaderAPI_Trampolines
BootloaderAPI_Trampolines:
BootloaderAPI_ErasePage_Trampoline:
jmp BootloaderAPI_ErasePage
BootloaderAPI_WritePage_Trampoline:
jmp BootloaderAPI_WritePage
BootloaderAPI_FillWord_Trampoline:
jmp BootloaderAPI_FillWord
BootloaderAPI_ReadSignature_Trampoline:
jmp BootloaderAPI_ReadSignature
BootloaderAPI_ReadFuse_Trampoline:
jmp BootloaderAPI_ReadFuse
BootloaderAPI_ReadLock_Trampoline:
jmp BootloaderAPI_ReadLock
BootloaderAPI_WriteLock_Trampoline:
jmp BootloaderAPI_WriteLock
BootloaderAPU_UNUSED1:
ret
BootloaderAPU_UNUSED2:
ret
BootloaderAPU_UNUSED3:
ret
BootloaderAPU_UNUSED4:
ret
BootloaderAPU_UNUSED5:
ret
; API function jump table
.org (96 - 32)
.section .apitable_jumptable, "ax"
.global BootloaderAPI_JumpTable
BootloaderAPI_JumpTable:
rjmp BootloaderAPI_ErasePage_Trampoline
rjmp BootloaderAPI_WritePage_Trampoline
rjmp BootloaderAPI_FillWord_Trampoline
@ -76,10 +79,13 @@ BootloaderAPI_JumpTable:
rjmp BootloaderAPU_UNUSED4 ; UNUSED ENTRY 4
rjmp BootloaderAPU_UNUSED5 ; UNUSED ENTRY 5
; Bootloader table signatures and information
.org (96 - 8)
BootloaderAPI_Signatures:
.section .apitable_signatures, "ax"
.global BootloaderAPI_Signatures
BootloaderAPI_Signatures:
.long BOOT_START_ADDR ; Start address of the bootloader
.word 0xCDC1 ; Signature for the CDC class bootloader, V1
.word 0xDFB1 ; Signature for the DFU class bootloader, V1
.word 0xDCFB ; Signature for a LUFA class bootloader