--- /dev/null
+/* system call stubs with cancellation handling. Linux/MIPS version.
+ Copyright (C) 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Chris Demetriou of Broadcom Corporation,
+ based on work by Guido Guenther <agx@sigxcpu.org>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+#ifndef __ASSEMBLER__
+# include <linuxthreads/internals.h>
+#endif
+#include <sys/asm.h>
+
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
+
+#ifdef __PIC__
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args) \
+ .align 2; \
+ 99: \
+ PTR_LA t9,__syscall_error; \
+ /* manual cpreturn. */ \
+ REG_L gp, STKOFF_GP(sp); \
+ RESTORESTK ; \
+ jr t9; \
+ ENTRY (name) \
+ SAVESTK ; \
+ .cpsetup t9, STKOFF_GP, name ; \
+ .set reorder; \
+ SINGLE_THREAD_P(t0); \
+ bne zero, t0, L(pseudo_cancel); \
+ .set noreorder; \
+ li v0, SYS_ify(syscall_name); \
+ syscall; \
+ .set reorder; \
+ bne a3, zero, SYSCALL_ERROR_LABEL; \
+ /* manual cpreturn. */ \
+ REG_L gp, STKOFF_GP(sp); \
+ RESTORESTK ; \
+ ret; \
+ L(pseudo_cancel): \
+ REG_S ra, STKOFF_RA(sp); \
+ PUSHARGS_##args; /* save syscall args */ \
+ CENABLE; \
+ REG_S v0, STKOFF_SVMSK(sp); /* save mask */ \
+ POPARGS_##args; /* restore syscall args */ \
+ .set noreorder; \
+ li v0, SYS_ify (syscall_name); \
+ syscall; \
+ .set reorder; \
+ REG_S v0, STKOFF_SC_V0(sp); /* save syscall result */ \
+ REG_S a3, STKOFF_SC_ERR(sp); /* save syscall error flag */ \
+ REG_L a0, STKOFF_SVMSK(sp); /* pass mask as arg1 */ \
+ CDISABLE; \
+ REG_L a3, STKOFF_SC_ERR(sp); /* restore syscall error flag */ \
+ REG_L ra, STKOFF_RA(sp); /* restore return address */ \
+ REG_L v0, STKOFF_SC_V0(sp); /* restore syscall result */ \
+ bne a3, zero, SYSCALL_ERROR_LABEL; \
+ /* manual cpreturn. */ \
+ REG_L gp, STKOFF_GP(sp); \
+ RESTORESTK ; \
+ L(pseudo_end):
+#endif
+
+# define PUSHARGS_0 /* nothing to do */
+# define PUSHARGS_1 PUSHARGS_0 REG_S a0, STKOFF_A0(sp);
+# define PUSHARGS_2 PUSHARGS_1 REG_S a1, STKOFF_A1(sp);
+# define PUSHARGS_3 PUSHARGS_2 REG_S a2, STKOFF_A2(sp);
+# define PUSHARGS_4 PUSHARGS_3 REG_S a3, STKOFF_A3(sp);
+# define PUSHARGS_5 PUSHARGS_4 REG_S a4, STKOFF_A4(sp);
+# define PUSHARGS_6 PUSHARGS_5 REG_S a5, STKOFF_A5(sp);
+
+# define POPARGS_0 /* nothing to do */
+# define POPARGS_1 POPARGS_0 REG_L a0, STKOFF_A0(sp);
+# define POPARGS_2 POPARGS_1 REG_L a1, STKOFF_A1(sp);
+# define POPARGS_3 POPARGS_2 REG_L a2, STKOFF_A2(sp);
+# define POPARGS_4 POPARGS_3 REG_L a3, STKOFF_A3(sp);
+# define POPARGS_5 POPARGS_4 REG_L a4, STKOFF_A4(sp);
+# define POPARGS_6 POPARGS_5 REG_L a5, STKOFF_A5(sp);
+
+/* Save an even number of slots. Should be 0 if an even number of slots
+ are used below, or SZREG if an odd number are used. */
+# define STK_PAD SZREG
+
+/* Place values that we are more likely to use later in this sequence, i.e.
+ closer to the SP at function entry. If you do that, the are more
+ likely to already be in your d-cache. */
+# define STKOFF_A5 (STK_PAD)
+# define STKOFF_A4 (STKOFF_A5 + SZREG)
+# define STKOFF_A3 (STKOFF_A4 + SZREG)
+# define STKOFF_A2 (STKOFF_A3 + SZREG) /* MT and more args. */
+# define STKOFF_A1 (STKOFF_A2 + SZREG) /* MT and 2 args. */
+# define STKOFF_A0 (STKOFF_A1 + SZREG) /* MT and 1 arg. */
+# define STKOFF_RA (STKOFF_A0 + SZREG) /* Used if MT. */
+# define STKOFF_SC_V0 (STKOFF_RA + SZREG) /* Used if MT. */
+# define STKOFF_SC_ERR (STKOFF_SC_V0 + SZREG) /* Used if MT. */
+# define STKOFF_SVMSK (STKOFF_SC_ERR + SZREG) /* Used if MT. */
+# define STKOFF_GP (STKOFF_SVMSK + SZREG) /* Always used. */
+
+# define STKSPACE (STKOFF_GP + SZREG)
+# define SAVESTK PTR_SUBU sp, STKSPACE
+# define RESTORESTK PTR_ADDU sp, STKSPACE
+
+# ifdef IS_IN_libpthread
+# define CENABLE PTR_LA t9, __pthread_enable_asynccancel; jalr t9;
+# define CDISABLE PTR_LA t9, __pthread_disable_asynccancel; jalr t9;
+# define __local_multiple_threads __pthread_multiple_threads
+# else
+# define CENABLE PTR_LA t9, __libc_enable_asynccancel; jalr t9;
+# define CDISABLE PTR_LA t9, __libc_disable_asynccancel; jalr t9;
+# define __local_multiple_threads __libc_multiple_threads
+# endif
+
+# if !defined NOT_IN_libc
+# define __local_multiple_threads __libc_multiple_threads
+# else
+# define __local_multiple_threads __pthread_multiple_threads
+# endif
+
+# ifndef __ASSEMBLER__
+extern int __local_multiple_threads attribute_hidden;
+# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
+# else
+# define SINGLE_THREAD_P(reg) lw reg, __local_multiple_threads
+#endif
+
+#elif !defined __ASSEMBLER__
+
+/* This code should never be used but we define it anyhow. */
+# define SINGLE_THREAD_P (1)
+
+#endif
# define SYS_ify(syscall_name) __NR_N32_/**/syscall_name
#endif
+#ifdef __ASSEMBLER__
+
+/* We don't want the label for the error handler to be visible in the symbol
+ table when we define it here. */
+#ifdef __PIC__
+# define SYSCALL_ERROR_LABEL 99b
+#endif
+
+#else /* ! __ASSEMBLER__ */
-#ifndef __ASSEMBLER__
-#if 0 /* untested */
/* Define a macro which expands into the inline wrapper code for a system
call. */
#undef INLINE_SYSCALL
_sys_result; \
})
-#define internal_syscall7(name, err, arg1, arg2, arg3, arg4, arg5, arg6, arg7)\
-({ \
- long _sys_result; \
- \
- { \
- register long long __v0 asm("$2"); \
- register long long __a0 asm("$4") = (long long) arg1; \
- register long long __a1 asm("$5") = (long long) arg2; \
- register long long __a2 asm("$6") = (long long) arg3; \
- register long long __a3 asm("$7") = (long long) arg4; \
- register long long __a4 asm("$8") = (long long) arg5; \
- register long long __a5 asm("$9") = (long long) arg6; \
- register long long __a6 asm("$10") = (long long) arg7; \
- __asm__ volatile ( \
- ".set\tnoreorder\n\t" \
- "li\t$2, %5\t\t\t# " #name "\n\t" \
- "syscall\n\t" \
- ".set\treorder" \
- : "=r" (__v0), "+r" (__a3) \
- : "r" (__a0), "r" (__a1), "r" (__a2), "i" (SYS_ify(name)), \
- "r" (__a4), "r" (__a5), "r" (__a6) \
- : __SYSCALL_CLOBBERS); \
- err = __a3; \
- _sys_result = __v0; \
- } \
- _sys_result; \
-})
-
-#define __SYSCALL_CLOBBERS "$1", "$3", "$11", "$12", "$13", "$14", "$15", "$24", "$25"
-#endif /* untested */
+#define __SYSCALL_CLOBBERS "$1", "$3", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25"
#endif /* __ASSEMBLER__ */
#endif /* linux/mips/sysdep.h */
# define SYS_ify(syscall_name) __NR_N64_/**/syscall_name
#endif
+#ifdef __ASSEMBLER__
+
+/* We don't want the label for the error handler to be visible in the symbol
+ table when we define it here. */
+#ifdef __PIC__
+# define SYSCALL_ERROR_LABEL 99b
+#endif
+
+#else /* ! __ASSEMBLER__ */
-#ifndef __ASSEMBLER__
-#if 0 /* untested */
/* Define a macro which expands into the inline wrapper code for a system
call. */
#undef INLINE_SYSCALL
_sys_result; \
})
-#define internal_syscall7(name, err, arg1, arg2, arg3, arg4, arg5, arg6, arg7)\
-({ \
- long _sys_result; \
- \
- { \
- register long __v0 asm("$2"); \
- 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; \
- register long __a4 asm("$8") = (long) arg5; \
- register long __a5 asm("$9") = (long) arg6; \
- register long __a6 asm("$10") = (long) arg7; \
- __asm__ volatile ( \
- ".set\tnoreorder\n\t" \
- "li\t$2, %5\t\t\t# " #name "\n\t" \
- "syscall\n\t" \
- ".set\treorder" \
- : "=r" (__v0), "+r" (__a3) \
- : "r" (__a0), "r" (__a1), "r" (__a2), "i" (SYS_ify(name)), \
- "r" (__a4), "r" (__a5), "r" (__a6) \
- : __SYSCALL_CLOBBERS); \
- err = __a3; \
- _sys_result = __v0; \
- } \
- _sys_result; \
-})
-
-#define __SYSCALL_CLOBBERS "$1", "$3", "$11", "$12", "$13", "$14", "$15", "$24", "$25"
-#endif /* untested */
+#define __SYSCALL_CLOBBERS "$1", "$3", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25"
#endif /* __ASSEMBLER__ */
#endif /* linux/mips/sysdep.h */
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