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linux-sg2042
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score: add old syscall support

This commit is contained in:
Chen Liqin 2009-08-30 12:33:30 +08:00
parent 324f40fbb0
commit cf52c46835
3 changed files with 40 additions and 2 deletions
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5
arch/score/include/asm/unistd.h
View File

@ -3,6 +3,11 @@
#define __ARCH_HAVE_MMU
#define __ARCH_WANT_SYSCALL_NO_AT
#define __ARCH_WANT_SYSCALL_NO_FLAGS
#define __ARCH_WANT_SYSCALL_OFF_T
#define __ARCH_WANT_SYSCALL_DEPRECATED
#include <asm-generic/unistd.h>
#endif /* _ASM_SCORE_UNISTD_H */

13
arch/score/kernel/entry.S
View File

@ -499,3 +499,16 @@ ENTRY(sys_sigaltstack)
mv r4, r0
la r8, score_sigaltstack
br r8
#ifdef __ARCH_WANT_SYSCALL_DEPRECATED
ENTRY(sys_fork)
mv r4, r0
la r8, score_fork
br r8
ENTRY(sys_vfork)
mv r4, r0
la r8, score_vfork
br r8
#endif /* __ARCH_WANT_SYSCALL_DEPRECATED */

24
arch/score/kernel/sys_score.c
View File

@ -25,6 +25,7 @@
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/mman.h>
#include <linux/module.h>
#include <linux/unistd.h>
@ -49,8 +50,7 @@ sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
}
down_write(&current->mm->mmap_sem);
error = do_mmap_pgoff(file, addr, len, prot, flags,
pgoff >> (PAGE_SHIFT - 12));
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
up_write(&current->mm->mmap_sem);
if (file)
@ -59,6 +59,19 @@ sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
return error;
}
asmlinkage long
sys_mmap(unsigned long addr, unsigned long len, unsigned long prot,
unsigned long flags, unsigned long fd, off_t pgoff)
{
return sys_mmap2(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT);
}
asmlinkage long
score_fork(struct pt_regs *regs)
{
return do_fork(SIGCHLD, regs->regs[0], regs, 0, NULL, NULL);
}
/*
* Clone a task - this clones the calling program thread.
* This is called indirectly via a small wrapper
@ -81,6 +94,13 @@ score_clone(struct pt_regs *regs)
parent_tidptr, child_tidptr);
}
asmlinkage long
score_vfork(struct pt_regs *regs)
{
return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
regs->regs[0], regs, 0, NULL, NULL);
}
/*
* sys_execve() executes a new program.
* This is called indirectly via a small wrapper