Mercurial > repos > blastem
changeset 1079:329ff62ea391
Add a new memory map flag to support an auxilliary buffer for translating code from MMAP_PTR_IDX chunks for which the pointer is null
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Tue, 04 Oct 2016 18:30:24 -0700 |
| parents | c4bfbf55d418 |
| children | 382614130914 |
| files | backend.c backend.h |
| diffstat | 2 files changed, 5 insertions(+), 0 deletions(-) [+] |
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--- a/backend.c Tue Oct 04 18:28:35 2016 -0700 +++ b/backend.c Tue Oct 04 18:30:24 2016 -0700 @@ -65,6 +65,9 @@ ? mem_pointers[memmap[chunk].ptr_index] : memmap[chunk].buffer; if (!base) { + if (memmap[chunk].flags & MMAP_AUX_BUFF) { + return memmap[chunk].buffer + (address & memmap[chunk].aux_mask); + } return NULL; } return base + (address & memmap[chunk].mask);
--- a/backend.h Tue Oct 04 18:28:35 2016 -0700 +++ b/backend.h Tue Oct 04 18:30:24 2016 -0700 @@ -55,6 +55,7 @@ #define MMAP_ONLY_EVEN 0x20 #define MMAP_FUNC_NULL 0x40 #define MMAP_BYTESWAP 0x80 +#define MMAP_AUX_BUFF 0x100 typedef uint16_t (*read_16_fun)(uint32_t address, void * context); typedef uint8_t (*read_8_fun)(uint32_t address, void * context); @@ -65,6 +66,7 @@ uint32_t start; uint32_t end; uint32_t mask; + uint32_t aux_mask; uint16_t ptr_index; uint16_t flags; void * buffer;