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| author | Moonchild <moonchild@palemoon.org> | 2020-05-19 22:14:43 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-05-19 22:14:43 +0200 |
| commit | 750b4c3a11e6ed4d92598072899b02c549f17d26 (patch) | |
| tree | 75e1ec3ab5ecec3a0ec29a176a3b46ef33609b76 /js/src/jit/ProcessExecutableMemory.cpp | |
| parent | ffb32138cbe23dc275ec409770246739f9678cef (diff) | |
| parent | 052a035958d43c3fb0a980c0c7a93ad2073afddf (diff) | |
| download | UXP-750b4c3a11e6ed4d92598072899b02c549f17d26.tar UXP-750b4c3a11e6ed4d92598072899b02c549f17d26.tar.gz UXP-750b4c3a11e6ed4d92598072899b02c549f17d26.tar.lz UXP-750b4c3a11e6ed4d92598072899b02c549f17d26.tar.xz UXP-750b4c3a11e6ed4d92598072899b02c549f17d26.zip | |
Merge pull request #1544 from FlyGoat/mips-upstream
Implements initial MIPS Support
Diffstat (limited to 'js/src/jit/ProcessExecutableMemory.cpp')
| -rw-r--r-- | js/src/jit/ProcessExecutableMemory.cpp | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/js/src/jit/ProcessExecutableMemory.cpp b/js/src/jit/ProcessExecutableMemory.cpp index 71c2ab0dc..1ba5c4aae 100644 --- a/js/src/jit/ProcessExecutableMemory.cpp +++ b/js/src/jit/ProcessExecutableMemory.cpp @@ -589,7 +589,23 @@ static ProcessExecutableMemory execMemory; void* js::jit::AllocateExecutableMemory(size_t bytes, ProtectionSetting protection) { +#if defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64) + // On MIPS, j/jal instructions to branch within the current + // 256 MB-aligned region. + void* allocation = nullptr; + js::Vector<void*, 8, SystemAllocPolicy> unused_maps; + for (;;) { + allocation = execMemory.allocate(bytes, protection); + if ((uintptr_t(allocation) >> 28) == (uintptr_t(allocation + bytes) >> 28)) + break; + unused_maps.append(allocation); + } + for (size_t i = 0; i < unused_maps.length(); i++) + DeallocateExecutableMemory(unused_maps[i], bytes); + return allocation; +#else return execMemory.allocate(bytes, protection); +#endif } void |