Signature verification prior to startup

reyalp

13440

Re: Signature verification prior to startup

« Reply #80 on: 04 / July / 2017, 19:21:23 »

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Another note: you should not need bin_comp_fix.h except for cases like the sx280/sx270 where multiple PIDs use the same port.

You will need to make compat-table after adding ports and setting up the platform makefile.inc values

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waterwingz

12092

Re: Signature verification prior to startup

« Reply #81 on: 04 / July / 2017, 20:16:22 »

Quote from: reyalp on 04 / July / 2017, 19:21:23

Another note: you should not need bin_comp_fix.h except for cases like the sx280/sx270 where multiple PIDs use the same port.

Installing the wrong G16 firmware version causes the camera to "hang" with a slowly blinking green LED as expected.

But if I delete bin_comp_fix.h & bin_compat.h, rebuild, and again install the wrong firmware version (i.e. 1.00h instead of 1.01c) then I no longer get the blinking green light. The generated file is :

Code: [Select]

/* THIS FILE IS GENERATED, DO NOT EDIT! */                                                             

ver_sig_t ver_sigs[]={
    {(const char *)0xfc158a45, "GM1.00H"},
};
pid_sig_t pid_sigs[]={
};

vs my version :

Code: [Select]

#define DEBUG_DELAY 10000000   
ver_sig_t ver_sigs[]={
    {(const char *)0xfc158a45 , "GM1.00H"},  // substring of *"Firmware Ver GM1.00H" string in ROM
};
pid_sig_t pid_sigs[]={
    {(short *)0xfdf20040, PLATFORMID}, // g16 (0x3274 = 12916) near PRODUCT_ID and then Ver.006.015 gives 0xfdf20000 + 0x40
};

Quote

You will need to make compat-table after adding ports and setting up the platform makefile.inc values

I must have done that at some point - a g16 entry is added by my rolling patch file.

« Last Edit: 04 / July / 2017, 20:21:28 by waterwingz »

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Ported : A1200 SD940 G10 Powershot N G16

reyalp

13440

Re: Signature verification prior to startup

« Reply #82 on: 04 / July / 2017, 20:37:25 »

If PID is not found in stubs (which finsig_thumb2 current doesn't) the address should be set in a comment in makefile.inc, like on g7x

Code: [Select]

# next line is for the compatibility check, as comment
# PLATFORMID @ 0xfff20040

Note 0xfdf20040 and 0xfff20040 both likely work because ROM address space is mirrored, but the fff... version is preferred because reading it on a different camera is less likely to fail.

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waterwingz

12092

Re: Signature verification prior to startup

« Reply #83 on: 04 / July / 2017, 21:30:29 »

Quote from: reyalp on 04 / July / 2017, 20:37:25

If PID is not found in stubs (which finsig_thumb2 current doesn't) the address should be set in a comment in makefile.inc, like on g7x

Got it sorted now - thanks again. Another interesting journey into the bowels of CHDK.

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Ported : A1200 SD940 G10 Powershot N G16