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synced 2025-03-15 15:12:58 +03:00
fix pread/pwrite syscall calling convention on sh
despite sh not generally using register-pair alignment for 64-bit syscall arguments, there are arch-specific versions of the syscall entry points for pread and pwrite which include a dummy argument for alignment before the 64-bit offset argument.
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@ -2,6 +2,7 @@
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((union { long long ll; long l[2]; }){ .ll = x }).l[0], \
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((union { long long ll; long l[2]; }){ .ll = x }).l[1]
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#define __SYSCALL_LL_O(x) __SYSCALL_LL_E((x))
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#define __SYSCALL_LL_PRW(x) 0, __SYSCALL_LL_E((x))
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/* The extra OR instructions are to work around a hardware bug:
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* http://documentation.renesas.com/doc/products/mpumcu/tu/tnsh7456ae.pdf
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@ -12,6 +12,10 @@
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#define SYSCALL_MMAP2_UNIT 4096ULL
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#endif
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#ifndef __SYSCALL_LL_PRW
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#define __SYSCALL_LL_PRW(x) __SYSCALL_LL_O(x)
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#endif
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#ifndef __scc
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#define __scc(X) ((long) (X))
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typedef long syscall_arg_t;
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@ -4,7 +4,7 @@
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ssize_t pread(int fd, void *buf, size_t size, off_t ofs)
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{
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return syscall_cp(SYS_pread, fd, buf, size, __SYSCALL_LL_O(ofs));
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return syscall_cp(SYS_pread, fd, buf, size, __SYSCALL_LL_PRW(ofs));
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}
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LFS64(pread);
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@ -4,7 +4,7 @@
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ssize_t pwrite(int fd, const void *buf, size_t size, off_t ofs)
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{
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return syscall_cp(SYS_pwrite, fd, buf, size, __SYSCALL_LL_O(ofs));
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return syscall_cp(SYS_pwrite, fd, buf, size, __SYSCALL_LL_PRW(ofs));
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}
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LFS64(pwrite);
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