diff options
Diffstat (limited to 'libc/sysdeps/linux/mips/sysdep.h')
| -rw-r--r-- | libc/sysdeps/linux/mips/sysdep.h | 334 |
1 files changed, 259 insertions, 75 deletions
diff --git a/libc/sysdeps/linux/mips/sysdep.h b/libc/sysdeps/linux/mips/sysdep.h index f9778b2d1..8f4262196 100644 --- a/libc/sysdeps/linux/mips/sysdep.h +++ b/libc/sysdeps/linux/mips/sysdep.h @@ -23,38 +23,10 @@ Cambridge, MA 02139, USA. */ /* Not that using a `PASTE' macro loses. */ #ifdef __STDC__ -#ifdef __ELF__ - #define SYSCALL_WEAK_ALIAS(alias,orig) \ .weak alias; \ alias=__libc_##orig -/* -#ifdef _POSIX_THREADS -*/ - -#if 1 - -#ifdef PTHREAD_KERNEL - -/* Use the regular ELF conventions about underscores, and provide the - weak symbol, as required */ -#define SYSCALL__(name,args) PSEUDO (__machdep_sys_##name, name, args) \ -.weak machdep_sys_##name; \ - machdep_sys_##name = __machdep_sys_##name; \ -.type __machdep_sys_##name,@function; \ -.type machdep_sys_##name,@function; \ -.L__machdep_sys_##name##end: .size __machdep_sys_##name,.L__machdep_sys_##name##end - __machdep_sys_##name - -#define SYSCALL(name,args) PSEUDO (__machdep_sys_##name, name, args) \ -.weak machdep_sys_##name; \ - machdep_sys_##name = __machdep_sys_##name; \ -.type __machdep_sys_##name,@function; \ -.type machdep_sys_##name,@function; \ -.L__machdep_sys_##name##end: .size __machdep_sys_##name,.L__machdep_sys_##name##end - __machdep_sys_##name - -#else /* PTHREAD_KERNEL */ - /* Use the regular ELF conventions about underscores, and provide the weak symbol, as required */ #define SYSCALL__(name,args) PSEUDO (__libc_##name, name, args) \ @@ -74,39 +46,6 @@ Cambridge, MA 02139, USA. */ .type name,@function; \ .L__libc_##name##end: .size __libc_##name,.L__libc_##name##end - __libc_##name -#endif /* PTHREAD_KERNEL */ - -#else /* _POSIX_THREADS */ - -/* Use the regular ELF conventions about underscores, and provide the - weak symbol, as required */ -#define SYSCALL__(name,args) PSEUDO (__libc_##name, name, args) \ -.weak name; \ - __##name = __libc_##name; \ - name = __libc_##name; \ -.type __libc_##name,@function; \ -.type name,@function; \ -.type __##name,@function; \ -.L__libc_##name##end: .size __libc_##name,.L__libc_##name##end - __libc_##name - -#define SYSCALL(name,args) PSEUDO (__libc_##name, name, args) \ - name = __libc_##name; \ -.type __libc_##name,@function; \ -.type name,@function; \ -.L__libc_##name##end: .size __libc_##name,.L__libc_##name##end - __libc_##name - -#endif /* _POSIX_THREADS */ - -#else /* __ELF__ */ - -#define SYSCALL_WEAK_ALIAS(alias,orig) - -/* Regular a.out definition */ -#define SYSCALL__(name,args) PSEUDO (__##name, name, args) -#define SYSCALL(name,args) PSEUDO (name, name, args) - -#endif /* __ELF__ */ - #else /* __STDC__ */ #define SYSCALL__(name,args) PSEUDO (__/**/name, name, args) @@ -114,22 +53,267 @@ Cambridge, MA 02139, USA. */ #endif /* __STDC__ */ -/* Machine-dependent sysdep.h files are expected to define the macro - PSEUDO (function_name, syscall_name) to emit assembly code to define the - C-callable function FUNCTION_NAME to do system call SYSCALL_NAME. - r0 and r1 are the system call outputs. movl should be defined as - an instruction such that "movl r1, r0" works. ret should be defined - as the return instruction. */ - - -#if !defined(HAVE_GNU_LD) && !defined (__ELF__) -#define ___errno _errno +#ifndef __ASSEMBLER__ +/* Define a macro which expands into the inline wrapper code for a system + call. */ +#undef INLINE_SYSCALL +#if 0 +#define INLINE_SYSCALL(name, nr, args...) \ + ({ INTERNAL_SYSCALL_DECL(err); \ + long result_var = INTERNAL_SYSCALL (name, err, nr, args); \ + if ( INTERNAL_SYSCALL_ERROR_P (result_var, err) ) \ + { \ + __set_errno (INTERNAL_SYSCALL_ERRNO (result_var, err)); \ + result_var = -1L; \ + } \ + result_var; }) +#else +#define INLINE_SYSCALL(name, nr, args...) \ + ({ INTERNAL_SYSCALL_DECL(err); \ + long result_var = INTERNAL_SYSCALL (name, err, nr, args); \ + if ( INTERNAL_SYSCALL_ERROR_P (result_var, err) ) \ + { \ + result_var = __syscall_error((int) result_var); \ + } \ + result_var; }) #endif -#define HAVE_SYSCALLS - -#ifdef __PTHREADS_NATIVE__ -#include <sysdep-nptl.h> +#undef INTERNAL_SYSCALL_DECL +#define INTERNAL_SYSCALL_DECL(err) long err + +#undef INTERNAL_SYSCALL_ERROR_P +#define INTERNAL_SYSCALL_ERROR_P(val, err) ((long) (err)) + +#undef INTERNAL_SYSCALL_ERRNO +#define INTERNAL_SYSCALL_ERRNO(val, err) (val) + +#undef INTERNAL_SYSCALL +#define INTERNAL_SYSCALL(name, err, nr, args...) \ + internal_syscall##nr (, "li\t$2, %2\t\t\t# " #name "\n\t", \ + "i" (SYS_ify (name)), err, args) + +#undef INTERNAL_SYSCALL_NCS +#define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \ + internal_syscall##nr (= number, , "r" (__v0), err, args) + +#define internal_syscall0(ncs_init, cs_init, input, err, dummy...) \ +({ \ + long _sys_result; \ + \ + { \ + register long __v0 asm("$2") ncs_init; \ + register long __a3 asm("$7"); \ + __asm__ volatile ( \ + ".set\tnoreorder\n\t" \ + cs_init \ + "syscall\n\t" \ + ".set reorder" \ + : "=r" (__v0), "=r" (__a3) \ + : input \ + : __SYSCALL_CLOBBERS); \ + err = __a3; \ + _sys_result = __v0; \ + } \ + _sys_result; \ +}) + +#define internal_syscall1(ncs_init, cs_init, input, err, arg1) \ +({ \ + long _sys_result; \ + \ + { \ + register long __v0 asm("$2") ncs_init; \ + register long __a0 asm("$4") = (long) arg1; \ + register long __a3 asm("$7"); \ + __asm__ volatile ( \ + ".set\tnoreorder\n\t" \ + cs_init \ + "syscall\n\t" \ + ".set reorder" \ + : "=r" (__v0), "=r" (__a3) \ + : input, "r" (__a0) \ + : __SYSCALL_CLOBBERS); \ + err = __a3; \ + _sys_result = __v0; \ + } \ + _sys_result; \ +}) + +#define internal_syscall2(ncs_init, cs_init, input, err, arg1, arg2) \ +({ \ + long _sys_result; \ + \ + { \ + register long __v0 asm("$2") ncs_init; \ + register long __a0 asm("$4") = (long) arg1; \ + register long __a1 asm("$5") = (long) arg2; \ + register long __a3 asm("$7"); \ + __asm__ volatile ( \ + ".set\tnoreorder\n\t" \ + cs_init \ + "syscall\n\t" \ + ".set\treorder" \ + : "=r" (__v0), "=r" (__a3) \ + : input, "r" (__a0), "r" (__a1) \ + : __SYSCALL_CLOBBERS); \ + err = __a3; \ + _sys_result = __v0; \ + } \ + _sys_result; \ +}) + +#define internal_syscall3(ncs_init, cs_init, input, err, arg1, arg2, arg3)\ +({ \ + long _sys_result; \ + \ + { \ + register long __v0 asm("$2") ncs_init; \ + register long __a0 asm("$4") = (long) arg1; \ + register long __a1 asm("$5") = (long) arg2; \ + register long __a2 asm("$6") = (long) arg3; \ + register long __a3 asm("$7"); \ + __asm__ volatile ( \ + ".set\tnoreorder\n\t" \ + cs_init \ + "syscall\n\t" \ + ".set\treorder" \ + : "=r" (__v0), "=r" (__a3) \ + : input, "r" (__a0), "r" (__a1), "r" (__a2) \ + : __SYSCALL_CLOBBERS); \ + err = __a3; \ + _sys_result = __v0; \ + } \ + _sys_result; \ +}) + +#define internal_syscall4(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4)\ +({ \ + long _sys_result; \ + \ + { \ + register long __v0 asm("$2") ncs_init; \ + register long __a0 asm("$4") = (long) arg1; \ + register long __a1 asm("$5") = (long) arg2; \ + register long __a2 asm("$6") = (long) arg3; \ + register long __a3 asm("$7") = (long) arg4; \ + __asm__ volatile ( \ + ".set\tnoreorder\n\t" \ + cs_init \ + "syscall\n\t" \ + ".set\treorder" \ + : "=r" (__v0), "+r" (__a3) \ + : input, "r" (__a0), "r" (__a1), "r" (__a2) \ + : __SYSCALL_CLOBBERS); \ + err = __a3; \ + _sys_result = __v0; \ + } \ + _sys_result; \ +}) + +/* We need to use a frame pointer for the functions in which we + adjust $sp around the syscall, or debug information and unwind + information will be $sp relative and thus wrong during the syscall. As + of GCC 3.4.3, this is sufficient. */ +#define FORCE_FRAME_POINTER alloca (4) + +#define internal_syscall5(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4, arg5)\ +({ \ + long _sys_result; \ + \ + FORCE_FRAME_POINTER; \ + { \ + register long __v0 asm("$2") ncs_init; \ + register long __a0 asm("$4") = (long) arg1; \ + register long __a1 asm("$5") = (long) arg2; \ + register long __a2 asm("$6") = (long) arg3; \ + register long __a3 asm("$7") = (long) arg4; \ + __asm__ volatile ( \ + ".set\tnoreorder\n\t" \ + "subu\t$29, 32\n\t" \ + "sw\t%6, 16($29)\n\t" \ + cs_init \ + "syscall\n\t" \ + "addiu\t$29, 32\n\t" \ + ".set\treorder" \ + : "=r" (__v0), "+r" (__a3) \ + : input, "r" (__a0), "r" (__a1), "r" (__a2), \ + "r" ((long)arg5) \ + : __SYSCALL_CLOBBERS); \ + err = __a3; \ + _sys_result = __v0; \ + } \ + _sys_result; \ +}) + +#define internal_syscall6(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4, arg5, arg6)\ +({ \ + long _sys_result; \ + \ + FORCE_FRAME_POINTER; \ + { \ + register long __v0 asm("$2") ncs_init; \ + register long __a0 asm("$4") = (long) arg1; \ + register long __a1 asm("$5") = (long) arg2; \ + register long __a2 asm("$6") = (long) arg3; \ + register long __a3 asm("$7") = (long) arg4; \ + __asm__ volatile ( \ + ".set\tnoreorder\n\t" \ + "subu\t$29, 32\n\t" \ + "sw\t%6, 16($29)\n\t" \ + "sw\t%7, 20($29)\n\t" \ + cs_init \ + "syscall\n\t" \ + "addiu\t$29, 32\n\t" \ + ".set\treorder" \ + : "=r" (__v0), "+r" (__a3) \ + : input, "r" (__a0), "r" (__a1), "r" (__a2), \ + "r" ((long)arg5), "r" ((long)arg6) \ + : __SYSCALL_CLOBBERS); \ + err = __a3; \ + _sys_result = __v0; \ + } \ + _sys_result; \ +}) + +#define internal_syscall7(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4, arg5, arg6, arg7)\ +({ \ + long _sys_result; \ + \ + FORCE_FRAME_POINTER; \ + { \ + register long __v0 asm("$2") ncs_init; \ + register long __a0 asm("$4") = (long) arg1; \ + register long __a1 asm("$5") = (long) arg2; \ + register long __a2 asm("$6") = (long) arg3; \ + register long __a3 asm("$7") = (long) arg4; \ + __asm__ volatile ( \ + ".set\tnoreorder\n\t" \ + "subu\t$29, 32\n\t" \ + "sw\t%6, 16($29)\n\t" \ + "sw\t%7, 20($29)\n\t" \ + "sw\t%8, 24($29)\n\t" \ + cs_init \ + "syscall\n\t" \ + "addiu\t$29, 32\n\t" \ + ".set\treorder" \ + : "=r" (__v0), "+r" (__a3) \ + : input, "r" (__a0), "r" (__a1), "r" (__a2), \ + "r" ((long)arg5), "r" ((long)arg6), "r" ((long)arg7) \ + : __SYSCALL_CLOBBERS); \ + err = __a3; \ + _sys_result = __v0; \ + } \ + _sys_result; \ +}) + +#define __SYSCALL_CLOBBERS "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", \ + "$14", "$15", "$24", "$25", "memory" +#else +#define ENTRY(name) \ + .globl name; \ + .align 2; \ + .ent name,0; \ + name##: #endif #if _MIPS_SIM == _ABIO32 |