x32: Signal-related system calls

[cascardo/linux.git] / arch / x86 / kernel / entry_64.S

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index a17b342..53dc821 100644 (file)
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -746,6 +746,25 @@ ENTRY(stub_rt_sigreturn)
        CFI_ENDPROC
 END(stub_rt_sigreturn)
 
+#ifdef CONFIG_X86_X32_ABI
+       PTREGSCALL stub_x32_sigaltstack, sys32_sigaltstack, %rdx
+
+ENTRY(stub_x32_rt_sigreturn)
+       CFI_STARTPROC
+       addq $8, %rsp
+       PARTIAL_FRAME 0
+       SAVE_REST
+       movq %rsp,%rdi
+       FIXUP_TOP_OF_STACK %r11
+       call sys32_x32_rt_sigreturn
+       movq %rax,RAX(%rsp) # fixme, this could be done at the higher layer
+       RESTORE_REST
+       jmp int_ret_from_sys_call
+       CFI_ENDPROC
+END(stub_x32_rt_sigreturn)
+
+#endif
+
 /*
  * Build the entry stubs and pointer table with some assembler magic.
  * We pack 7 stubs into a single 32-byte chunk, which will fit in a