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Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/arm/eabi/sysdep.h')
-rw-r--r--ports/sysdeps/unix/sysv/linux/arm/eabi/sysdep.h199
1 files changed, 0 insertions, 199 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/arm/eabi/sysdep.h b/ports/sysdeps/unix/sysv/linux/arm/eabi/sysdep.h
deleted file mode 100644
index 408142c1a..000000000
--- a/ports/sysdeps/unix/sysv/linux/arm/eabi/sysdep.h
+++ /dev/null
@@ -1,199 +0,0 @@
-/* Copyright (C) 2005, 2006, 2007, 2009
- Free Software Foundation, Inc.
-
- This file is part of the GNU C Library.
-
- Contributed by Daniel Jacobowitz <dan@codesourcery.com>, Oct 2005.
-
- 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, see
- <http://www.gnu.org/licenses/>. */
-
-#ifndef _LINUX_ARM_EABI_SYSDEP_H
-#define _LINUX_ARM_EABI_SYSDEP_H 1
-
-#include <arm/sysdep.h>
-
-#include <tls.h>
-
-#if __NR_SYSCALL_BASE != 0
-# error Kernel headers are too old
-#endif
-
-/* Don't use stime, even if the kernel headers define it. We have
- settimeofday, and some EABI kernels have removed stime. Similarly
- use setitimer to implement alarm. */
-#undef __NR_stime
-#undef __NR_alarm
-
-/* The ARM EABI user interface passes the syscall number in r7, instead
- of in the swi. This is more efficient, because the kernel does not need
- to fetch the swi from memory to find out the number; which can be painful
- with separate I-cache and D-cache. Make sure to use 0 for the SWI
- argument; otherwise the (optional) compatibility code for APCS binaries
- may be invoked. */
-
-#if defined(__thumb__)
-/* We can not expose the use of r7 to the compiler. GCC (as
- of 4.5) uses r7 as the hard frame pointer for Thumb - although
- for Thumb-2 it isn't obviously a better choice than r11.
- And GCC does not support asms that conflict with the frame
- pointer.
-
- This would be easier if syscall numbers never exceeded 255,
- but they do. For the moment the LOAD_ARGS_7 is sacrificed.
- We can't use push/pop inside the asm because that breaks
- unwinding (i.e. thread cancellation) for this frame. We can't
- locally save and restore r7, because we do not know if this
- function uses r7 or if it is our caller's r7; if it is our caller's,
- then unwinding will fail higher up the stack. So we move the
- syscall out of line and provide its own unwind information. */
-#undef LOAD_ARGS_7
-#undef INTERNAL_SYSCALL_RAW
-#define INTERNAL_SYSCALL_RAW(name, err, nr, args...) \
- ({ \
- register int _a1 asm ("a1"); \
- int _nametmp = name; \
- LOAD_ARGS_##nr (args) \
- register int _name asm ("ip") = _nametmp; \
- asm volatile ("bl __libc_do_syscall" \
- : "=r" (_a1) \
- : "r" (_name) ASM_ARGS_##nr \
- : "memory", "lr"); \
- _a1; })
-#else /* ARM */
-#undef INTERNAL_SYSCALL_RAW
-#define INTERNAL_SYSCALL_RAW(name, err, nr, args...) \
- ({ \
- register int _a1 asm ("r0"), _nr asm ("r7"); \
- LOAD_ARGS_##nr (args) \
- _nr = name; \
- asm volatile ("swi 0x0 @ syscall " #name \
- : "=r" (_a1) \
- : "r" (_nr) ASM_ARGS_##nr \
- : "memory"); \
- _a1; })
-#endif
-
-/* For EABI, non-constant syscalls are actually pretty easy... */
-#undef INTERNAL_SYSCALL_NCS
-#define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \
- INTERNAL_SYSCALL_RAW (number, err, nr, args)
-
-/* We must save and restore r7 (call-saved) for the syscall number.
- We never make function calls from inside here (only potentially
- signal handlers), so we do not bother with doubleword alignment.
-
- Just like the APCS syscall convention, the EABI syscall convention uses
- r0 through r6 for up to seven syscall arguments. None are ever passed to
- the kernel on the stack, although incoming arguments are on the stack for
- syscalls with five or more arguments.
-
- The assembler will convert the literal pool load to a move for most
- syscalls. */
-
-#undef DO_CALL
-#define DO_CALL(syscall_name, args) \
- DOARGS_##args; \
- ldr r7, =SYS_ify (syscall_name); \
- swi 0x0; \
- UNDOARGS_##args
-
-#undef DOARGS_0
-#define DOARGS_0 \
- .fnstart; \
- str r7, [sp, #-4]!; \
- cfi_adjust_cfa_offset (4); \
- cfi_rel_offset (r7, 0); \
- .save { r7 }
-#undef DOARGS_1
-#define DOARGS_1 DOARGS_0
-#undef DOARGS_2
-#define DOARGS_2 DOARGS_0
-#undef DOARGS_3
-#define DOARGS_3 DOARGS_0
-#undef DOARGS_4
-#define DOARGS_4 DOARGS_0
-#undef DOARGS_5
-#define DOARGS_5 \
- .fnstart; \
- stmfd sp!, {r4, r7}; \
- cfi_adjust_cfa_offset (8); \
- cfi_rel_offset (r4, 0); \
- cfi_rel_offset (r7, 4); \
- .save { r4, r7 }; \
- ldr r4, [sp, #8]
-#undef DOARGS_6
-#define DOARGS_6 \
- .fnstart; \
- mov ip, sp; \
- stmfd sp!, {r4, r5, r7}; \
- cfi_adjust_cfa_offset (12); \
- cfi_rel_offset (r4, 0); \
- cfi_rel_offset (r5, 4); \
- cfi_rel_offset (r7, 8); \
- .save { r4, r5, r7 }; \
- ldmia ip, {r4, r5}
-#undef DOARGS_7
-#define DOARGS_7 \
- .fnstart; \
- mov ip, sp; \
- stmfd sp!, {r4, r5, r6, r7}; \
- cfi_adjust_cfa_offset (16); \
- cfi_rel_offset (r4, 0); \
- cfi_rel_offset (r5, 4); \
- cfi_rel_offset (r6, 8); \
- cfi_rel_offset (r7, 12); \
- .save { r4, r5, r6, r7 }; \
- ldmia ip, {r4, r5, r6}
-
-#undef UNDOARGS_0
-#define UNDOARGS_0 \
- ldr r7, [sp], #4; \
- cfi_adjust_cfa_offset (-4); \
- cfi_restore (r7); \
- .fnend
-#undef UNDOARGS_1
-#define UNDOARGS_1 UNDOARGS_0
-#undef UNDOARGS_2
-#define UNDOARGS_2 UNDOARGS_0
-#undef UNDOARGS_3
-#define UNDOARGS_3 UNDOARGS_0
-#undef UNDOARGS_4
-#define UNDOARGS_4 UNDOARGS_0
-#undef UNDOARGS_5
-#define UNDOARGS_5 \
- ldmfd sp!, {r4, r7}; \
- cfi_adjust_cfa_offset (-8); \
- cfi_restore (r4); \
- cfi_restore (r7); \
- .fnend
-#undef UNDOARGS_6
-#define UNDOARGS_6 \
- ldmfd sp!, {r4, r5, r7}; \
- cfi_adjust_cfa_offset (-12); \
- cfi_restore (r4); \
- cfi_restore (r5); \
- cfi_restore (r7); \
- .fnend
-#undef UNDOARGS_7
-#define UNDOARGS_7 \
- ldmfd sp!, {r4, r5, r6, r7}; \
- cfi_adjust_cfa_offset (-16); \
- cfi_restore (r4); \
- cfi_restore (r5); \
- cfi_restore (r6); \
- cfi_restore (r7); \
- .fnend
-
-#endif /* _LINUX_ARM_EABI_SYSDEP_H */
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