diff options
Diffstat (limited to 'libc/sysdeps/linux/hppa/bits/syscalls.h')
| -rw-r--r-- | libc/sysdeps/linux/hppa/bits/syscalls.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/hppa/bits/syscalls.h b/libc/sysdeps/linux/hppa/bits/syscalls.h new file mode 100644 index 000000000..013c24095 --- /dev/null +++ b/libc/sysdeps/linux/hppa/bits/syscalls.h @@ -0,0 +1,166 @@ +#ifndef _BITS_SYSCALLS_H +#define _BITS_SYSCALLS_H +#ifndef _SYSCALL_H +# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead." +#endif + +/* This includes the `__NR_<name>' syscall numbers taken from the Linux kernel + * header files. It also defines the traditional `SYS_<name>' macros for older + * programs. */ +#include <bits/sysnum.h> + +#ifndef __set_errno +# define __set_errno(val) (*__errno_location ()) = (val) +#endif + +#ifndef __ASSEMBLER__ + +#define SYS_ify(syscall_name) __NR_##syscall_name + +/* Assume all syscalls are done from PIC code just to be + * safe. The worst case scenario is that you lose a register + * and save/restore r19 across the syscall. */ +#define PIC + +#ifndef ASM_LINE_SEP +# define ASM_LINE_SEP ; +#endif + +/* Definition taken from glibc 2.3.3 + * sysdeps/unix/sysv/linux/hppa/sysdep.h + */ + +#ifdef PIC +/* WARNING: CANNOT BE USED IN A NOP! */ +# define K_STW_ASM_PIC " copy %%r19, %%r4\n" +# define K_LDW_ASM_PIC " copy %%r4, %%r19\n" +# define K_USING_GR4 "%r4", +#else +# define K_STW_ASM_PIC " \n" +# define K_LDW_ASM_PIC " \n" +# define K_USING_GR4 +#endif + +/* GCC has to be warned that a syscall may clobber all the ABI + registers listed as "caller-saves", see page 8, Table 2 + in section 2.2.6 of the PA-RISC RUN-TIME architecture + document. However! r28 is the result and will conflict with + the clobber list so it is left out. Also the input arguments + registers r20 -> r26 will conflict with the list so they + are treated specially. Although r19 is clobbered by the syscall + we cannot say this because it would violate ABI, thus we say + r4 is clobbered and use that register to save/restore r19 + across the syscall. */ + +#define K_CALL_CLOB_REGS "%r1", "%r2", K_USING_GR4 \ + "%r20", "%r29", "%r31" + +#undef K_INLINE_SYSCALL +#define K_INLINE_SYSCALL(name, nr, args...) ({ \ + long __sys_res; \ + { \ + register unsigned long __res asm("r28"); \ + K_LOAD_ARGS_##nr(args) \ + /* FIXME: HACK stw/ldw r19 around syscall */ \ + asm volatile( \ + K_STW_ASM_PIC \ + " ble 0x100(%%sr2, %%r0)\n" \ + " ldi %1, %%r20\n" \ + K_LDW_ASM_PIC \ + : "=r" (__res) \ + : "i" (SYS_ify(name)) K_ASM_ARGS_##nr \ + : "memory", K_CALL_CLOB_REGS K_CLOB_ARGS_##nr \ + ); \ + __sys_res = (long)__res; \ + } \ + if ( (unsigned long)__sys_res >= (unsigned long)-4095 ){ \ + errno = -__sys_res; \ + __sys_res = -1; \ + } \ + __sys_res; \ +}) + +#define K_LOAD_ARGS_0() +#define K_LOAD_ARGS_1(r26) \ + register unsigned long __r26 __asm__("r26") = (unsigned long)(r26); \ + K_LOAD_ARGS_0() +#define K_LOAD_ARGS_2(r26,r25) \ + register unsigned long __r25 __asm__("r25") = (unsigned long)(r25); \ + K_LOAD_ARGS_1(r26) +#define K_LOAD_ARGS_3(r26,r25,r24) \ + register unsigned long __r24 __asm__("r24") = (unsigned long)(r24); \ + K_LOAD_ARGS_2(r26,r25) +#define K_LOAD_ARGS_4(r26,r25,r24,r23) \ + register unsigned long __r23 __asm__("r23") = (unsigned long)(r23); \ + K_LOAD_ARGS_3(r26,r25,r24) +#define K_LOAD_ARGS_5(r26,r25,r24,r23,r22) \ + register unsigned long __r22 __asm__("r22") = (unsigned long)(r22); \ + K_LOAD_ARGS_4(r26,r25,r24,r23) +#define K_LOAD_ARGS_6(r26,r25,r24,r23,r22,r21) \ + register unsigned long __r21 __asm__("r21") = (unsigned long)(r21); \ + K_LOAD_ARGS_5(r26,r25,r24,r23,r22) + +/* Even with zero args we use r20 for the syscall number */ +#define K_ASM_ARGS_0 +#define K_ASM_ARGS_1 K_ASM_ARGS_0, "r" (__r26) +#define K_ASM_ARGS_2 K_ASM_ARGS_1, "r" (__r25) +#define K_ASM_ARGS_3 K_ASM_ARGS_2, "r" (__r24) +#define K_ASM_ARGS_4 K_ASM_ARGS_3, "r" (__r23) +#define K_ASM_ARGS_5 K_ASM_ARGS_4, "r" (__r22) +#define K_ASM_ARGS_6 K_ASM_ARGS_5, "r" (__r21) + +/* The registers not listed as inputs but clobbered */ +#define K_CLOB_ARGS_6 +#define K_CLOB_ARGS_5 K_CLOB_ARGS_6, "%r21" +#define K_CLOB_ARGS_4 K_CLOB_ARGS_5, "%r22" +#define K_CLOB_ARGS_3 K_CLOB_ARGS_4, "%r23" +#define K_CLOB_ARGS_2 K_CLOB_ARGS_3, "%r24" +#define K_CLOB_ARGS_1 K_CLOB_ARGS_2, "%r25" +#define K_CLOB_ARGS_0 K_CLOB_ARGS_1, "%r26" + +#define _syscall0(type,name) \ +type name(void) \ +{ \ + return (type) K_INLINE_SYSCALL(name, 0); \ +} + +#define _syscall1(type,name,type1,arg1) \ +type name(type1 arg1) \ +{ \ + return (type) K_INLINE_SYSCALL(name, 1, arg1); \ +} + +#define _syscall2(type,name,type1,arg1,type2,arg2) \ +type name(type1 arg1, type2 arg2) \ +{ \ + return (type) K_INLINE_SYSCALL(name, 2, arg1, arg2); \ +} + +#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \ +type name(type1 arg1, type2 arg2, type3 arg3) \ +{ \ + return (type) K_INLINE_SYSCALL(name, 3, arg1, arg2, arg3); \ +} + +#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \ +type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4) \ +{ \ + return (type) K_INLINE_SYSCALL(name, 4, arg1, arg2, arg3, arg4); \ +} + +/* select takes 5 arguments */ +#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \ +type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) \ +{ \ + return (type) K_INLINE_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5); \ +} + +/* mmap & mmap2 take 6 arguments */ +#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5,type6,arg6) \ +type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5, type6 arg6) \ +{ \ + return (type) K_INLINE_SYSCALL(name, 6, arg1, arg2, arg3, arg4, arg5, arg6); \ +} + +#endif /* __ASSEMBLER__ */ +#endif /* _ASM_PARISC_UNISTD_H_ */ |