diff options
Diffstat (limited to 'arch/um/include')
| -rw-r--r-- | arch/um/include/as-layout.h | 24 | ||||
| -rw-r--r-- | arch/um/include/sysdep-i386/stub.h | 11 | ||||
| -rw-r--r-- | arch/um/include/sysdep-x86_64/stub.h | 13 |
3 files changed, 37 insertions, 11 deletions
diff --git a/arch/um/include/as-layout.h b/arch/um/include/as-layout.h index 2f16a1c..a5cdf95 100644 --- a/arch/um/include/as-layout.h +++ b/arch/um/include/as-layout.h @@ -6,6 +6,28 @@ #ifndef __START_H__ #define __START_H__ +#include "uml-config.h" +#include "kern_constants.h" + +/* + * Assembly doesn't want any casting, but C does, so define these + * without casts here, and define new symbols with casts inside the C + * section. + */ +#define ASM_STUB_CODE (UML_CONFIG_TOP_ADDR - 2 * UM_KERN_PAGE_SIZE) +#define ASM_STUB_DATA (UML_CONFIG_TOP_ADDR - UM_KERN_PAGE_SIZE) +#define ASM_STUB_START ASM_STUB_CODE + +/* + * This file is included by the assembly stubs, which just want the + * definitions above. + */ +#ifndef __ASSEMBLY__ + +#define STUB_CODE ((unsigned long) ASM_STUB_CODE) +#define STUB_DATA ((unsigned long) ASM_STUB_DATA) +#define STUB_START ((unsigned long) ASM_STUB_START) + #include "sysdep/ptrace.h" struct cpu_task { @@ -32,3 +54,5 @@ extern int linux_main(int argc, char **argv); extern void (*sig_info[])(int, struct uml_pt_regs *); #endif + +#endif diff --git a/arch/um/include/sysdep-i386/stub.h b/arch/um/include/sysdep-i386/stub.h index 19c85f3..8c097b8 100644 --- a/arch/um/include/sysdep-i386/stub.h +++ b/arch/um/include/sysdep-i386/stub.h @@ -9,6 +9,7 @@ #include <sys/mman.h> #include <asm/ptrace.h> #include <asm/unistd.h> +#include "as-layout.h" #include "stub-data.h" #include "kern_constants.h" #include "uml-config.h" @@ -89,12 +90,12 @@ static inline void remap_stack(int fd, unsigned long offset) { __asm__ volatile ("movl %%eax,%%ebp ; movl %0,%%eax ; int $0x80 ;" "movl %7, %%ebx ; movl %%eax, (%%ebx)" - : : "g" (STUB_MMAP_NR), "b" (UML_CONFIG_STUB_DATA), - "c" (UM_KERN_PAGE_SIZE), + : : "g" (STUB_MMAP_NR), "b" (STUB_DATA), + "c" (UM_KERN_PAGE_SIZE), "d" (PROT_READ | PROT_WRITE), - "S" (MAP_FIXED | MAP_SHARED), "D" (fd), - "a" (offset), - "i" (&((struct stub_data *) UML_CONFIG_STUB_DATA)->err) + "S" (MAP_FIXED | MAP_SHARED), "D" (fd), + "a" (offset), + "i" (&((struct stub_data *) STUB_DATA)->err) : "memory"); } diff --git a/arch/um/include/sysdep-x86_64/stub.h b/arch/um/include/sysdep-x86_64/stub.h index 92e989f..655f9c2 100644 --- a/arch/um/include/sysdep-x86_64/stub.h +++ b/arch/um/include/sysdep-x86_64/stub.h @@ -9,6 +9,7 @@ #include <sys/mman.h> #include <asm/unistd.h> #include <sysdep/ptrace_user.h> +#include "as-layout.h" #include "stub-data.h" #include "kern_constants.h" #include "uml-config.h" @@ -94,13 +95,13 @@ static inline void remap_stack(long fd, unsigned long offset) { __asm__ volatile ("movq %4,%%r10 ; movq %5,%%r8 ; " "movq %6, %%r9; " __syscall "; movq %7, %%rbx ; " - "movq %%rax, (%%rbx)": - : "a" (STUB_MMAP_NR), "D" (UML_CONFIG_STUB_DATA), - "S" (UM_KERN_PAGE_SIZE), - "d" (PROT_READ | PROT_WRITE), - "g" (MAP_FIXED | MAP_SHARED), "g" (fd), + "movq %%rax, (%%rbx)": + : "a" (STUB_MMAP_NR), "D" (STUB_DATA), + "S" (UM_KERN_PAGE_SIZE), + "d" (PROT_READ | PROT_WRITE), + "g" (MAP_FIXED | MAP_SHARED), "g" (fd), "g" (offset), - "i" (&((struct stub_data *) UML_CONFIG_STUB_DATA)->err) + "i" (&((struct stub_data *) STUB_DATA)->err) : __syscall_clobber, "r10", "r8", "r9" ); } |