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b87cf63e2a
SYSCALL/SYSRET and SYSENTER/SYSEXIT have weird semantics. Moreover, they differ in 32- and 64-bit mode. What is saved? What is not? Is rsp set? Are interrupts disabled? People tend to not remember these details well enough. This patch adds comments which explain in detail what registers are modified by each of these instructions. The comments are placed immediately before corresponding entry and exit points. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> Signed-off-by: Andy Lutomirski <luto@amacapital.net> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Drewry <wad@chromium.org> Link: http://lkml.kernel.org/r/a94b98b63527797c871a81402ff5060b18fa880a.1424989793.git.luto@amacapital.net Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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| .. | ||
| audit.c | ||
| ia32_aout.c | ||
| ia32_signal.c | ||
| ia32entry.S | ||
| Makefile | ||
| sys_ia32.c | ||