forked from Minki/linux
3ae908c99e
Definition of CALLER_ADDR* through __builtin_return_address makes
compiler insert calls to __xtensa_libgcc_window_spill, which in turn
makes fast_syscall_spill_registers syscall that clobbers registers when
called from the kernel mode, leading to invalid opcode exceptions on
return to userspace.
Provide definition for CALLER_ADDR0 as MAKE_PC_FROM_RA(a0, a1) and in
case CONFIG_FRAME_POINTER is enabled extract CALLER_ADDR{1-3} from
stack.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
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| .. | ||
| align.S | ||
| asm-offsets.c | ||
| coprocessor.S | ||
| entry.S | ||
| head.S | ||
| irq.c | ||
| Makefile | ||
| module.c | ||
| pci-dma.c | ||
| pci.c | ||
| platform.c | ||
| process.c | ||
| ptrace.c | ||
| setup.c | ||
| signal.c | ||
| stacktrace.c | ||
| syscall.c | ||
| time.c | ||
| traps.c | ||
| vectors.S | ||
| vmlinux.lds.S | ||
| xtensa_ksyms.c | ||