Commit 1cb0661e009267a5d060c4686f0857784a8da228
1 parent
3233f0d4
arm: Reserve code buffer in memory range reachable for pc-relative branch.
Unfortunately this range is so narrow that I'm not sure if it makes more sense to always use memory load to pc kind of branch instead. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5844 c046a42c-6fe2-441c-8c8c-71466251a162
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exec.c
| ... | ... | @@ -436,6 +436,12 @@ static void code_gen_alloc(unsigned long tb_size) |
| 436 | 436 | start = (void *) 0x60000000UL; |
| 437 | 437 | if (code_gen_buffer_size > (512 * 1024 * 1024)) |
| 438 | 438 | code_gen_buffer_size = (512 * 1024 * 1024); |
| 439 | +#elif defined(__arm__) | |
| 440 | + /* Map the buffer below 64M, so we can use direct calls and branches */ | |
| 441 | + flags |= MAP_FIXED; | |
| 442 | + start = (void *) 0x01000000UL; | |
| 443 | + if (code_gen_buffer_size > 16 * 1024 * 1024) | |
| 444 | + code_gen_buffer_size = 16 * 1024 * 1024; | |
| 439 | 445 | #endif |
| 440 | 446 | code_gen_buffer = mmap(start, code_gen_buffer_size, |
| 441 | 447 | PROT_WRITE | PROT_READ | PROT_EXEC, | ... | ... |