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author | Don Dugger <n0ano@n0ano.com> | 2016-06-03 03:33:22 +0000 |
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committer | Gerrit Code Review <gerrit@172.30.200.206> | 2016-06-03 03:33:23 +0000 |
commit | da27230f80795d0028333713f036d44c53cb0e68 (patch) | |
tree | b3d379eaf000adf72b36cb01cdf4d79c3e3f064c /qemu/tcg/tcg-be-ldst.h | |
parent | 0e68cb048bb8aadb14675f5d4286d8ab2fc35449 (diff) | |
parent | 437fd90c0250dee670290f9b714253671a990160 (diff) |
Merge "These changes are the raw update to qemu-2.6."
Diffstat (limited to 'qemu/tcg/tcg-be-ldst.h')
-rw-r--r-- | qemu/tcg/tcg-be-ldst.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/qemu/tcg/tcg-be-ldst.h b/qemu/tcg/tcg-be-ldst.h index 40a2369b7..17777aec5 100644 --- a/qemu/tcg/tcg-be-ldst.h +++ b/qemu/tcg/tcg-be-ldst.h @@ -56,7 +56,7 @@ static inline void tcg_out_tb_init(TCGContext *s) static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l); static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l); -static void tcg_out_tb_finalize(TCGContext *s) +static bool tcg_out_tb_finalize(TCGContext *s) { TCGLabelQemuLdst *lb; @@ -67,7 +67,16 @@ static void tcg_out_tb_finalize(TCGContext *s) } else { tcg_out_qemu_st_slow_path(s, lb); } + + /* Test for (pending) buffer overflow. The assumption is that any + one operation beginning below the high water mark cannot overrun + the buffer completely. Thus we can test for overflow after + generating code without having to check during generation. */ + if (unlikely((void *)s->code_ptr > s->code_gen_highwater)) { + return false; + } } + return true; } /* |