Commit d5dd696f authored by Richard Henderson's avatar Richard Henderson
Browse files

tcg-sparc: Don't MAP_FIXED on top of the program 



The address we pick in sparc64.ld is also 0x60000000, so doing a fixed map
on top of that is guaranteed to blow up.  Choosing 0x40000000 is exactly
right for the max of code_gen_buffer_size set below.

No need to ever use MAP_FIXED.  While getting our desired address helps
optimize the generated code, we won't fail if we don't get it.

Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent a221ae3f

exec.c

+2 −4
Original line number Diff line number Diff line
@@ -543,8 +543,7 @@ static void code_gen_alloc(unsigned long tb_size) 
            code_gen_buffer_size = (800 * 1024 * 1024);

#elif defined(__sparc_v9__)

        // Map the buffer below 2G, so we can use direct calls and branches

        flags |= MAP_FIXED;

        start = (void *) 0x60000000UL;

        start = (void *) 0x40000000UL;

        if (code_gen_buffer_size > (512 * 1024 * 1024))

            code_gen_buffer_size = (512 * 1024 * 1024);

#elif defined(__arm__)
@@ -584,8 +583,7 @@ static void code_gen_alloc(unsigned long tb_size) 
            code_gen_buffer_size = (800 * 1024 * 1024);

#elif defined(__sparc_v9__)

        // Map the buffer below 2G, so we can use direct calls and branches

        flags |= MAP_FIXED;

        addr = (void *) 0x60000000UL;

        addr = (void *) 0x40000000UL;

        if (code_gen_buffer_size > (512 * 1024 * 1024)) {

            code_gen_buffer_size = (512 * 1024 * 1024);

        }