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add description of BB patch/checksum command

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This commit is contained in:
Martin Michelsen
2022-05-21 23:58:34 -07:00
parent 641639a659
commit 908671c55b
2 changed files with 33 additions and 10 deletions
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src/CommandFormats.hh
+29 -6
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@@ -1152,10 +1152,9 @@ struct S_ConfirmUpdateQuestStatistics_AB {
// Client will respond with a 99 command.
// B2 (S->C): Execute code and/or checksum memory
// GC v1.0 and v1.1 only.
// GC v1.0/v1.1 and BB only.
// Much of this command's information came from Sylverant's documentation.
// Client will respond with a B3 command.
// Note: BB has a handler for this, but (as of yet) I don't know what it does.
struct S_ExecuteCode_GC_B2 {
// Offsets in this command are relative to the start of the header, not the
@@ -1187,11 +1186,35 @@ struct S_ExecuteCode_Relocations_GC_B2 {
// le_uint16_t offsets[count];
};
// B3 (C->S): Execute code and/or checksum memory result
// GC v1.0 and v1.1 only.
// Support exists in BB for this command, but to my knowledge it has never been
// used. Like on GC, the client will respond with a B3 command.
struct C_ExecuteCodeResult_GC_B3 {
le_uint32_t return_value;
struct S_ExecuteCode_BB_B2 {
// If code_size == 0, no code is executed (but checksumming may still occur).
le_uint32_t code_size; // Size of code (following this struct) and footer
le_uint32_t checksum_address; // May be null if size is zero
le_uint32_t checksum_size;
};
struct S_ExecuteCode_Footer_BB_B2 {
// Relocations is a list of words (le_uint16_t) containing the number of words
// to skip for each relocation. The relocation pointer starts immediately
// after the checksum_size field in the header, and advances by the value of
// one word before each relocation. At each relocated doubleword, the address
// of the first byte of the code (after checksum_size) is added to the
// existing value.
le_uint32_t relocations_offset;
le_uint32_t num_relocations;
le_uint32_t unknown_a1[2];
le_uint32_t entrypoint_offset; // Relative to code base (after checksum_size)
le_uint32_t unknown_a2[3];
};
// B3 (C->S): Execute code and/or checksum memory result
// GC v1.0/v1.1 and BB only.
struct C_ExecuteCodeResult_GC_BB_B3 {
le_uint32_t return_value; // 0 if no code was run
le_uint32_t checksum;
};