diff options
| author | H. Peter Anvin <hpa@zytor.com> | 2009-05-04 17:22:27 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-05-04 17:22:27 -0700 |
| commit | 7be7457989ab10f75383d3b1e776d4db013ac405 (patch) | |
| tree | 070c6d26c3ada685e7714e178f87ba7d11b0acf3 /com32/lib/syslinux | |
| parent | fb41a8cb8c851e894fb9441f3dce80b2dffa4849 (diff) | |
| download | syslinux-7be7457989ab10f75383d3b1e776d4db013ac405.tar.gz | |
linux.c32: cap the stack pointer to 0xfff0
Linux itself is fine with sp = 0 for a 64K segment, but perhaps other
things aren't. Just to be safe, set the stack pointer to 64K-16
bytes.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'com32/lib/syslinux')
| -rw-r--r-- | com32/lib/syslinux/load_linux.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/com32/lib/syslinux/load_linux.c b/com32/lib/syslinux/load_linux.c index 6380149e..82cef8be 100644 --- a/com32/lib/syslinux/load_linux.c +++ b/com32/lib/syslinux/load_linux.c @@ -483,7 +483,8 @@ int syslinux_boot_linux(void *kernel_buf, size_t kernel_size, regs.es = regs.ds = regs.ss = regs.fs = regs.gs = real_mode_base >> 4; regs.cs = (real_mode_base >> 4)+0x20; /* regs.ip = 0; */ - regs.esp.w[0] = cmdline_offset; + /* Linux is OK with sp = 0 = 64K, but perhaps other things aren't... */ + regs.esp.w[0] = min(cmdline_offset, 0xfff0); #if DEBUG dprintf("Final memory map:\n"); |