diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/sysdep.h | 208 |
1 files changed, 207 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/sysdep.h index 1f477a945d..0f067db8cc 100644 --- a/sysdeps/unix/sysv/linux/powerpc/sysdep.h +++ b/sysdeps/unix/sysv/linux/powerpc/sysdep.h @@ -16,10 +16,214 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ +#ifndef _LINUX_POWERPC_SYSDEP_H +#define _LINUX_POWERPC_SYSDEP_H 1 + +#include <sysdeps/unix/sysv/linux/sysdep.h> +#include <sysdeps/unix/powerpc/sysdep.h> +#include <tls.h> +/* Define __set_errno() for INLINE_SYSCALL macro below. */ +#include <errno.h> + +/* For Linux we can use the system call table in the header file + /usr/include/asm/unistd.h + of the kernel. But these symbols do not follow the SYS_* syntax + so we have to redefine the `SYS_ify' macro here. */ +#undef SYS_ify +#define SYS_ify(syscall_name) __NR_##syscall_name + +/* Define a macro which expands inline into the wrapper code for a system + call. This use is for internal calls that do not need to handle errors + normally. It will never touch errno. This returns just what the kernel + gave back in the non-error (CR0.SO cleared) case, otherwise (CR0.SO set) + the negation of the return value in the kernel gets reverted. */ + +#define INTERNAL_VSYSCALL_CALL_TYPE(funcptr, err, type, nr, args...) \ + ({ \ + register void *r0 __asm__ ("r0"); \ + register long int r3 __asm__ ("r3"); \ + register long int r4 __asm__ ("r4"); \ + register long int r5 __asm__ ("r5"); \ + register long int r6 __asm__ ("r6"); \ + register long int r7 __asm__ ("r7"); \ + register long int r8 __asm__ ("r8"); \ + register type rval __asm__ ("r3"); \ + LOADARGS_##nr (funcptr, args); \ + __asm__ __volatile__ \ + ("mtctr %0\n\t" \ + "bctrl\n\t" \ + "mfcr %0\n\t" \ + "0:" \ + : "+r" (r0), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), \ + "+r" (r7), "+r" (r8) \ + : : "r9", "r10", "r11", "r12", "cr0", "ctr", "lr", "memory"); \ + err = (long int) r0; \ + __asm__ __volatile__ ("" : "=r" (rval) : "r" (r3)); \ + rval; \ + }) + +#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \ + INTERNAL_VSYSCALL_CALL_TYPE(funcptr, err, long int, nr, args) + +/* This version is for kernels that implement system calls that + behave like function calls as far as register saving. */ +#undef INLINE_SYSCALL +#define INLINE_SYSCALL(name, nr, args...) \ + ({ \ + INTERNAL_SYSCALL_DECL (sc_err); \ + long int sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, args); \ + if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \ + { \ + __set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \ + sc_ret = -1L; \ + } \ + sc_ret; \ + }) + +/* Define a macro which expands inline into the wrapper code for a system + call. This use is for internal calls that do not need to handle errors + normally. It will never touch errno. This returns just what the kernel + gave back in the non-error (CR0.SO cleared) case, otherwise (CR0.SO set) + the negation of the return value in the kernel gets reverted. */ + +#undef INTERNAL_SYSCALL +#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ + ({ \ + register long int r0 __asm__ ("r0"); \ + register long int r3 __asm__ ("r3"); \ + register long int r4 __asm__ ("r4"); \ + register long int r5 __asm__ ("r5"); \ + register long int r6 __asm__ ("r6"); \ + register long int r7 __asm__ ("r7"); \ + register long int r8 __asm__ ("r8"); \ + LOADARGS_##nr (name, ##args); \ + __asm__ __volatile__ \ + ("sc\n\t" \ + "mfcr %0\n\t" \ + "0:" \ + : "=&r" (r0), \ + "=&r" (r3), "=&r" (r4), "=&r" (r5), \ + "=&r" (r6), "=&r" (r7), "=&r" (r8) \ + : ASM_INPUT_##nr \ + : "r9", "r10", "r11", "r12", \ + "cr0", "ctr", "memory"); \ + err = r0; \ + r3; \ + }) +#define INTERNAL_SYSCALL(name, err, nr, args...) \ + INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, args) + +#undef INTERNAL_SYSCALL_DECL +#define INTERNAL_SYSCALL_DECL(err) long int err __attribute__ ((unused)) + +#undef INTERNAL_SYSCALL_ERROR_P +#define INTERNAL_SYSCALL_ERROR_P(val, err) \ + ((void) (val), __builtin_expect ((err) & (1 << 28), 0)) + +#undef INTERNAL_SYSCALL_ERRNO +#define INTERNAL_SYSCALL_ERRNO(val, err) (val) + +#if defined(__PPC64__) || defined(__powerpc64__) +# define SYSCALL_ARG_SIZE 8 +#else +# define SYSCALL_ARG_SIZE 4 +#endif + +#define LOADARGS_0(name, dummy) \ + r0 = name +#define LOADARGS_1(name, __arg1) \ + long int arg1 = (long int) (__arg1); \ + LOADARGS_0(name, 0); \ + extern void __illegally_sized_syscall_arg1 (void); \ + if (__builtin_classify_type (__arg1) != 5 \ + && sizeof (__arg1) > SYSCALL_ARG_SIZE) \ + __illegally_sized_syscall_arg1 (); \ + r3 = arg1 +#define LOADARGS_2(name, __arg1, __arg2) \ + long int arg2 = (long int) (__arg2); \ + LOADARGS_1(name, __arg1); \ + extern void __illegally_sized_syscall_arg2 (void); \ + if (__builtin_classify_type (__arg2) != 5 \ + && sizeof (__arg2) > SYSCALL_ARG_SIZE) \ + __illegally_sized_syscall_arg2 (); \ + r4 = arg2 +#define LOADARGS_3(name, __arg1, __arg2, __arg3) \ + long int arg3 = (long int) (__arg3); \ + LOADARGS_2(name, __arg1, __arg2); \ + extern void __illegally_sized_syscall_arg3 (void); \ + if (__builtin_classify_type (__arg3) != 5 \ + && sizeof (__arg3) > SYSCALL_ARG_SIZE) \ + __illegally_sized_syscall_arg3 (); \ + r5 = arg3 +#define LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4) \ + long int arg4 = (long int) (__arg4); \ + LOADARGS_3(name, __arg1, __arg2, __arg3); \ + extern void __illegally_sized_syscall_arg4 (void); \ + if (__builtin_classify_type (__arg4) != 5 \ + && sizeof (__arg4) > SYSCALL_ARG_SIZE) \ + __illegally_sized_syscall_arg4 (); \ + r6 = arg4 +#define LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5) \ + long int arg5 = (long int) (__arg5); \ + LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4); \ + extern void __illegally_sized_syscall_arg5 (void); \ + if (__builtin_classify_type (__arg5) != 5 \ + && sizeof (__arg5) > SYSCALL_ARG_SIZE) \ + __illegally_sized_syscall_arg5 (); \ + r7 = arg5 +#define LOADARGS_6(name, __arg1, __arg2, __arg3, __arg4, __arg5, __arg6) \ + long int arg6 = (long int) (__arg6); \ + LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5); \ + extern void __illegally_sized_syscall_arg6 (void); \ + if (__builtin_classify_type (__arg6) != 5 \ + && sizeof (__arg6) > SYSCALL_ARG_SIZE) \ + __illegally_sized_syscall_arg6 (); \ + r8 = arg6 + +#define ASM_INPUT_0 "0" (r0) +#define ASM_INPUT_1 ASM_INPUT_0, "1" (r3) +#define ASM_INPUT_2 ASM_INPUT_1, "2" (r4) +#define ASM_INPUT_3 ASM_INPUT_2, "3" (r5) +#define ASM_INPUT_4 ASM_INPUT_3, "4" (r6) +#define ASM_INPUT_5 ASM_INPUT_4, "5" (r7) +#define ASM_INPUT_6 ASM_INPUT_5, "6" (r8) + + +/* Pointer mangling support. */ +#if IS_IN (rtld) +/* We cannot use the thread descriptor because in ld.so we use setjmp + earlier than the descriptor is initialized. */ +#else +# ifdef __ASSEMBLER__ +# if defined(__PPC64__) || defined(__powerpc64__) +# define LOAD ld +# define TPREG r13 +# else +# define LOAD lwz +# define TPREG r2 +# endif +# define PTR_MANGLE(reg, tmpreg) \ + LOAD tmpreg,POINTER_GUARD(TPREG); \ + xor reg,tmpreg,reg +# define PTR_MANGLE2(reg, tmpreg) \ + xor reg,tmpreg,reg +# define PTR_MANGLE3(destreg, reg, tmpreg) \ + LOAD tmpreg,POINTER_GUARD(TPREG); \ + xor destreg,tmpreg,reg +# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg) +# define PTR_DEMANGLE2(reg, tmpreg) PTR_MANGLE2 (reg, tmpreg) +# define PTR_DEMANGLE3(destreg, reg, tmpreg) PTR_MANGLE3 (destreg, reg, tmpreg) +# else +# define PTR_MANGLE(var) \ + (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ()) +# define PTR_DEMANGLE(var) PTR_MANGLE (var) +# endif +#endif + +/* List of system calls which are supported as vsyscalls. */ #define VDSO_NAME "LINUX_2.6.15" #define VDSO_HASH 123718565 -/* List of system calls which are supported as vsyscalls. */ #if defined(__PPC64__) || defined(__powerpc64__) #define HAVE_CLOCK_GETRES64_VSYSCALL "__kernel_clock_getres" #define HAVE_CLOCK_GETTIME64_VSYSCALL "__kernel_clock_gettime" @@ -38,3 +242,5 @@ # define HAVE_SIGTRAMP_32 "__kernel_sigtramp32" # define HAVE_SIGTRAMP_RT32 "__kernel_sigtramp_rt32" #endif + +#endif /* _LINUX_POWERPC_SYSDEP_H */ |