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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c79902190f
Fix signal handling for when signals are handled as the result of timers or exceptions, previous code assumed syscalls. This was noticeable with X crashing where it uses SIGALRM. This patch restores all regs before returning to userspace via _resume_userspace instead of via syscall return path. The rt_sigreturn syscall is more like a context switch than a function call; it entails a return from one context (the signal handler) to another (the process in question). For a context switch like this there are effectively no call-saved regs that remain constant across the transition. Reported-by: Sebastian Macke <sebastian@macke.de> Signed-off-by: Jonas Bonn <jonas@southpole.se> Tested-by: Guenter Roeck <linux@roeck-us.net> [shorne@gmail.com: Updated comment better reflect change and issue] Signed-off-by: Stafford Horne <shorne@gmail.com> |
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| .. | ||
| asm-offsets.c | ||
| dma.c | ||
| entry.S | ||
| head.S | ||
| irq.c | ||
| Makefile | ||
| module.c | ||
| or32_ksyms.c | ||
| process.c | ||
| prom.c | ||
| ptrace.c | ||
| setup.c | ||
| signal.c | ||
| sys_call_table.c | ||
| time.c | ||
| traps.c | ||
| vmlinux.h | ||
| vmlinux.lds.S | ||