diff options
Diffstat (limited to 'arch/x86/um/shared/sysdep/stub_64.h')
| -rw-r--r-- | arch/x86/um/shared/sysdep/stub_64.h | 41 |
1 files changed, 16 insertions, 25 deletions
diff --git a/arch/x86/um/shared/sysdep/stub_64.h b/arch/x86/um/shared/sysdep/stub_64.h index b24168ef0ac4..67f44284f1aa 100644 --- a/arch/x86/um/shared/sysdep/stub_64.h +++ b/arch/x86/um/shared/sysdep/stub_64.h @@ -6,6 +6,7 @@ #ifndef __SYSDEP_STUB_H #define __SYSDEP_STUB_H +#include <stddef.h> #include <sysdep/ptrace_user.h> #include <generated/asm-offsets.h> #include <linux/stddef.h> @@ -79,35 +80,25 @@ static __always_inline long stub_syscall5(long syscall, long arg1, long arg2, return ret; } -static __always_inline void trap_myself(void) +static __always_inline long stub_syscall6(long syscall, long arg1, long arg2, + long arg3, long arg4, long arg5, + long arg6) { - __asm("int3"); + long ret; + + __asm__ volatile ("movq %5,%%r10 ; movq %6,%%r8 ; movq %7,%%r9 ; " + __syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3), + "g" (arg4), "g" (arg5), "g" (arg6) + : __syscall_clobber, "r10", "r8", "r9"); + + return ret; } -static __always_inline void remap_stack_and_trap(void) +static __always_inline void trap_myself(void) { - __asm__ volatile ( - "movq %0,%%rax ;" - "movq %%rsp,%%rdi ;" - "andq %1,%%rdi ;" - "movq %2,%%r10 ;" - "movq %%rdi,%%r8 ; addq %3,%%r8 ; movq (%%r8),%%r8 ;" - "movq %%rdi,%%r9 ; addq %4,%%r9 ; movq (%%r9),%%r9 ;" - __syscall ";" - "movq %%rsp,%%rdi ; andq %1,%%rdi ;" - "addq %5,%%rdi ; movq %%rax, (%%rdi) ;" - "int3" - : : - "g" (STUB_MMAP_NR), - "g" (~(STUB_DATA_PAGES * UM_KERN_PAGE_SIZE - 1)), - "g" (MAP_FIXED | MAP_SHARED), - "g" (UML_STUB_FIELD_FD), - "g" (UML_STUB_FIELD_OFFSET), - "g" (UML_STUB_FIELD_CHILD_ERR), - "S" (STUB_DATA_PAGES * UM_KERN_PAGE_SIZE), - "d" (PROT_READ | PROT_WRITE) - : - __syscall_clobber, "r10", "r8", "r9"); + __asm("int3"); } static __always_inline void *get_stub_data(void) |