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| author | Kevin O'Connor <kevin@koconnor.net> | 2010-11-25 08:52:50 -0500 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2010-11-25 08:52:50 -0500 |
| commit | 4057f9847e94147aaa9799b92ba4561506333a57 (patch) | |
| tree | 240e28b8ffa057b5716c3378e7623d23870e7033 /src/stacks.c | |
| parent | e2623fc6bce2a332d58fa00b00787432102fb089 (diff) | |
| download | seabios-hppa-4057f9847e94147aaa9799b92ba4561506333a57.zip seabios-hppa-4057f9847e94147aaa9799b92ba4561506333a57.tar.gz seabios-hppa-4057f9847e94147aaa9799b92ba4561506333a57.tar.bz2 | |
Don't pass return address to transition(32,16,16big) on stack.
It's difficult to have a uniform view of the stack when transition
modes, so pass the return address in a register. As a result, the
transition functions only access memory via the %cs selector now.
Diffstat (limited to 'src/stacks.c')
| -rw-r--r-- | src/stacks.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/stacks.c b/src/stacks.c index 14f6f8a..a68d37c 100644 --- a/src/stacks.c +++ b/src/stacks.c @@ -66,11 +66,11 @@ call32(void *func) " movl %%ss, %0\n" // Transition to 32bit mode, call func, return to 16bit - " pushl $(" __stringify(BUILD_BIOS_ADDR) " + 1f)\n" + " movl $(" __stringify(BUILD_BIOS_ADDR) " + 1f), %%edx\n" " jmp transition32\n" " .code32\n" "1:calll *%2\n" - " pushl $2f\n" + " movl $2f, %%edx\n" " jmp transition16big\n" // Restore ds/ss/esp |