mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 08:21:14 +00:00
100 lines
2.8 KiB
Diff
100 lines
2.8 KiB
Diff
commit 70a04a287a2875c82e6822c36e071afba5b63a62
|
|
Author: Waldemar Brodkorb <wbx@openadk.org>
|
|
Date: Wed Jan 29 18:58:56 2014 +0100
|
|
|
|
libc: mips: Fix setjmp/longjmp for MIPS64 N64 ABI
|
|
|
|
When booting a Linux system with qemu-system-mips64 the execution
|
|
of $(pwd) in the ash shell triggers a segmentation fault. Ash uses
|
|
setjmp/longjmp for exception handling.
|
|
|
|
After looking at the glibc implementation,
|
|
I found some differences, with this patch tries to resolve.
|
|
Now the system boots up fine and no segmentation faults occur.
|
|
|
|
The global pointer should be restored and the types for the
|
|
register values should be wide enough.
|
|
|
|
See:
|
|
http://www.cygwin.com/ml/libc-alpha/2003-03/msg00363.html
|
|
|
|
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
|
|
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
|
|
|
|
--- a/libc/sysdeps/linux/mips/bits/setjmp.h
|
|
+++ b/libc/sysdeps/linux/mips/bits/setjmp.h
|
|
@@ -26,13 +26,19 @@
|
|
|
|
#include <sgidefs.h>
|
|
|
|
+#if _MIPS_SIM == _MIPS_SIM_ABI32
|
|
+#define ptrsize void *
|
|
+#else
|
|
+#define ptrsize long long
|
|
+#endif
|
|
+
|
|
typedef struct
|
|
{
|
|
/* Program counter. */
|
|
- void * __pc;
|
|
+ ptrsize __pc;
|
|
|
|
/* Stack pointer. */
|
|
- void * __sp;
|
|
+ ptrsize __sp;
|
|
|
|
/* Callee-saved registers s0 through s7. */
|
|
#if _MIPS_SIM == _MIPS_SIM_ABI32
|
|
@@ -42,10 +48,10 @@ typedef struct
|
|
#endif
|
|
|
|
/* The frame pointer. */
|
|
- void * __fp;
|
|
+ ptrsize __fp;
|
|
|
|
/* The global pointer. */
|
|
- void * __gp;
|
|
+ ptrsize __gp;
|
|
|
|
/* Floating point status register. */
|
|
int __fpc_csr;
|
|
--- a/libc/sysdeps/linux/mips/setjmp.S
|
|
+++ b/libc/sysdeps/linux/mips/setjmp.S
|
|
@@ -53,6 +53,7 @@ __sigsetjmp:
|
|
PTR_LA t9, __sigsetjmp_aux
|
|
#if _MIPS_SIM != _MIPS_SIM_ABI32
|
|
.cpreturn
|
|
+ move a4, gp
|
|
#endif
|
|
jr t9
|
|
#else
|
|
--- a/libc/sysdeps/linux/mips/setjmp_aux.c
|
|
+++ b/libc/sysdeps/linux/mips/setjmp_aux.c
|
|
@@ -31,7 +31,7 @@ extern int __sigjmp_save (sigjmp_buf, in
|
|
|
|
int
|
|
#if _MIPS_SIM == _MIPS_SIM_ABI64
|
|
-__sigsetjmp_aux (jmp_buf env, int savemask, long sp, long fp)
|
|
+__sigsetjmp_aux (jmp_buf env, int savemask, long long sp, long long fp, long long gp)
|
|
#else /* O32 || N32 */
|
|
__sigsetjmp_aux (jmp_buf env, int savemask, int sp, int fp)
|
|
#endif /* O32 || N32 */
|
|
@@ -65,14 +65,14 @@ __sigsetjmp_aux (jmp_buf env, int savema
|
|
#endif
|
|
|
|
/* .. and the stack pointer; */
|
|
- env[0].__jmpbuf[0].__sp = (void *) sp;
|
|
+ env[0].__jmpbuf[0].__sp = (ptrsize) sp;
|
|
|
|
/* .. and the FP; it'll be in s8. */
|
|
- env[0].__jmpbuf[0].__fp = (void *) fp;
|
|
+ env[0].__jmpbuf[0].__fp = (ptrsize) fp;
|
|
|
|
/* .. and the GP; */
|
|
#if _MIPS_SIM == _MIPS_SIM_ABI64
|
|
- __asm__ __volatile__ ("sd $gp, %0" : : "m" (env[0].__jmpbuf[0].__gp));
|
|
+ env[0].__jmpbuf[0].__gp = (ptrsize) gp;
|
|
#else
|
|
__asm__ __volatile__ ("sw $gp, %0" : : "m" (env[0].__jmpbuf[0].__gp));
|
|
#endif
|