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72 lines
2.2 KiB
Diff
72 lines
2.2 KiB
Diff
From 7cc3a28eed7e3b72a1ce4568fb55154bb0540726 Mon Sep 17 00:00:00 2001
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From: Rich Felker <dalias@aerifal.cx>
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Date: Thu, 11 Aug 2016 18:36:46 -0400
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Subject: fix pread/pwrite syscall calling convention on sh
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despite sh not generally using register-pair alignment for 64-bit
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syscall arguments, there are arch-specific versions of the syscall
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entry points for pread and pwrite which include a dummy argument for
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alignment before the 64-bit offset argument.
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---
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arch/sh/syscall_arch.h | 1 +
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src/internal/syscall.h | 4 ++++
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src/unistd/pread.c | 2 +-
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src/unistd/pwrite.c | 2 +-
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4 files changed, 7 insertions(+), 2 deletions(-)
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diff --git a/arch/sh/syscall_arch.h b/arch/sh/syscall_arch.h
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index f63675a..84758fe 100644
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--- a/arch/sh/syscall_arch.h
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+++ b/arch/sh/syscall_arch.h
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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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diff --git a/src/internal/syscall.h b/src/internal/syscall.h
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index ff3cf53..6d378a8 100644
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--- a/src/internal/syscall.h
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+++ b/src/internal/syscall.h
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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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+
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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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diff --git a/src/unistd/pread.c b/src/unistd/pread.c
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index 3d2799f..5483eb9 100644
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--- a/src/unistd/pread.c
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+++ b/src/unistd/pread.c
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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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diff --git a/src/unistd/pwrite.c b/src/unistd/pwrite.c
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index bbe4c34..4bf3d7d 100644
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--- a/src/unistd/pwrite.c
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+++ b/src/unistd/pwrite.c
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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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--
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cgit v0.11.2
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