72 lines
1.8 KiB
Diff
72 lines
1.8 KiB
Diff
From: Thorsten Glaser <tg@mirbsd.org>
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Date: Tue, 8 Nov 2011 22:33:12 +0000
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Subject: [PATCH] fix mmap syscall on ARM
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several issues found while debugging on the Debian armhf porterbox
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on #debian-arm with pbrook (Paul Brook) and lindi- (Timo Juhani Lindfors)
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- the comment only applies to the non-EABI part of the function
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- "This is ARM code. But you've not maked mmap as a function symbol."
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=> use the arm-features.h macros
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Index: pkg-dietlibc/arm/mmap.S
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===================================================================
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--- pkg-dietlibc.orig/arm/mmap.S 2012-03-25 15:07:28.000000000 +0000
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+++ pkg-dietlibc/arm/mmap.S 2012-03-25 15:14:00.000000000 +0000
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@@ -1,22 +1,13 @@
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#include <errno.h>
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#include "syscalls.h"
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+#include "dietfeatures.h"
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+#include "arm-features.h"
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.text
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-@
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-@ mmap takes 6 parameters - ie more than can be passed in registers via the
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-@ regular syscall interface. Instead, parameters are passed on the stack.
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-@
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-@ On entry, the compiler will have already placed the fifth and sixth
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-@ parameters on the stack - all we need do here is push the first four and
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-@ call the syscall.
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-@
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-
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-.global mmap
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+FUNC_START mmap
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#ifdef __ARM_EABI__
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-
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-mmap:
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str r5, [sp, #-4]!
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ldr r5, [sp, #8]
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str r4, [sp, #-4]!
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@@ -28,11 +19,19 @@
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ldr r4, [sp], #4
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ldr r5, [sp], #4
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cmn r0, #4096
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- mov pc, lr @ return
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+ RET
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+
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+#else
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+
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+@
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+@ mmap takes 6 parameters - ie more than can be passed in registers via the
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+@ regular syscall interface. Instead, parameters are passed on the stack.
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+@
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+@ On entry, the compiler will have already placed the fifth and sixth
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+@ parameters on the stack - all we need do here is push the first four and
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+@ call the syscall.
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+@
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-#else
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-
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-mmap:
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stmdb sp!, {r0, r1, r2, r3}
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mov r0, sp
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swi __NR_mmap
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@@ -40,3 +39,5 @@
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b __unified_syscall
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#endif
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+
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+FUNC_END mmap
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