HIPC: Difference between revisions
| Line 86: | Line 86: | ||
| 1 || || Lower 32-bits of address. | | 1 || || Lower 32-bits of address. | ||
|- | |- | ||
| 2 || 1-0 || Flags. Always set to 1 or 3. | | 2 || 1-0 || Flags. Always set to 0, 1 or 3. Determines what [[SVC|MemoryState]] to use with the mapped memory in the sysmodule. | ||
|- | |- | ||
| 2 || 4-2 || Bit 38-36 of address. | | 2 || 4-2 || Bit 38-36 of address. | ||
| Line 113: | Line 113: | ||
=== IPC buffers === | === IPC buffers === | ||
Buffer descriptor A | Buffer descriptor A/B/... map memory into the sysmodule process. For the mapped memory in the sysmodule the permissions are: desc-A = R--, desc-B = RW-. The buffer is automatically unmapped while the kernel handles the cmdreply, the sysmodule doesn't need to specify anything in the cmdreply to trigger this. | ||
This memory is mapped in the sysmodule to the same vaddr from the original user-process cmd-request, except with with bits >=(~28(?)) changed to a different ASLR'd region. | This memory is mapped in the sysmodule to the same vaddr from the original user-process cmd-request, except with with bits >=(~28(?)) changed to a different ASLR'd region. | ||