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The INLINE_SYSCALL, INTERNAL_SYSCALL*, and internal_syscall* macros
are defined for MIPS in both libc/sysdeps/linux/mips/sysdep.h and
libc/sysdeps/linux/mips/bits/syscalls.h. The macros are the same
in both cases except that syscalls.h defines internal_syscalls[567]
the same for N32 and N64 ABIs and has a different definition for O32.
I believe that is correct. The sysdep.h header uses the O32 versions
for N32 and has different definitions for N64. I think that is wrong
and that N32 and N64 should share the same definition (modulo the
type 'long' vs. 'long long' for the arguments. This setup (from
sysdep.h) now agrees with what glibc has.
I am not positive about which header (sysdep.h vs syscalls.h) is
really the right one to have these definitions in but using sysdep.h
seems to work for all my builds.
Signed-off-by: Steve Ellcey <sellcey@mips.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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This patch uses 'attribute_unused' to clean up a number of warnings
messages that are generated when doing a MIPS build. All of the
changes are in MIPS specific files and there are no code changes
other then adding the unused attribute where needed.
Signed-off-by: Steve Ellcey <sellcey@mips.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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fork() is broken for MIPS64 N64 ABI. You can check it with a simple
C program statically linked with qemu-mips64 user emulation.
Internally fork() is using the clone system call (at least with NPTL)
with 5 arguments. See ./libpthread/nptl/sysdeps/unix/sysv/linux/i386/fork.c.
The calling conventions for MIPS N32 and N64 allow to use up to 8 registers
for that. See http://en.wikipedia.org/wiki/Calling_convention#MIPS
This is correctly implemented in libc/sysdeps/linux/mips/bits/syscalls.h,
but not in libc/sysdeps/linux/mips/sysdep.h. fork.c uses the later one.
It seems that fork() works fine for MIPS64 N32 with just using the stack like
with the O32 case. There is a user of INLINE_SYSCALL with 7 arguments in
libc/sysdeps/linux/common/sync_file_range.c for MIPS64 N32, so I decided to
only use the macros for the MIPS64 N64 case. With this patch my uClibc based
Linux system boots up fine in qemu-system-mips64.
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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* Add a common ret_ERRVAL definition
* Remove ret_ERRVAL from architectures using the common 'ret'
* Add 'undef' to architectures that need a different return instruction
* Add '#include <common/sysdep.h>' to cris and ia64 that were missing it
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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This matches a similar change made to glibc.
No functional changes here.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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If there was an error during syscall then after it's completion a3
register holds a non-zero value and v0 holds an actual error code which
should be saved in errno. This can be achieved by calling
__syscall_error with the value from v0 as a parameter. So this value
should be stored in a0, but the appropriate assembly instructions are
missing. Fixed this now by adding "move a0, v0".
I think it was once fixed by 58c5f8ba4cdf62342d05a546d15404cbbb3c4e07
but then something went wrong. Again...
Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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This patch avoid the following build error:
AS libc/sysdeps/linux/mips/vfork.os
In file included from libc/sysdeps/linux/mips/vfork.S:22:
./libc/sysdeps/linux/mips/sysdep.h:41:20: error: regdef.h: No such file
or directory
libc/sysdeps/linux/mips/vfork.S: Assembler messages:
libc/sysdeps/linux/mips/vfork.S:40: Warning: Unrecognized register name `sp'
libc/sysdeps/linux/mips/vfork.S:40: Warning: Bad .frame directive
libc/sysdeps/linux/mips/vfork.S:40: Error: junk at end of line, first
unrecognized character is `s'
libc/sysdeps/linux/mips/vfork.S:44: Error: illegal operands `dsubu
sp,FRAMESZ'
libc/sysdeps/linux/mips/vfork.S:45: Error: bad or irreducible absolute
expression
libc/sysdeps/linux/mips/vfork.S:65: Error: illegal operands `daddu
sp,FRAMESZ'
libc/sysdeps/linux/mips/vfork.S:69: Error: illegal operands `li a0,0x4112'
libc/sysdeps/linux/mips/vfork.S:70: Error: illegal operands `move a1,sp'
libc/sysdeps/linux/mips/vfork.S:73: Error: illegal operands `li
v0,(5000+55)'
libc/sysdeps/linux/mips/vfork.S:78: Error: illegal operands `bnez
a3,.Lerror'
libc/sysdeps/linux/mips/vfork.S:88: Error: illegal operands `dla
t9,__syscall_error'
libc/sysdeps/linux/mips/vfork.S:90: Error: illegal operands `jr t9'
Signed-off-by: Abdoulaye Walsimou Gaye <awg@embtoolkit.org>
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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* vfork impl with support for SAVE_PID, RESTORE_PID
* sysdep.h assembly macros
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
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