From: Bodo Stroesser <[EMAIL PROTECTED]> It's wrong to pop a fixed number of words from stack before calling sigreturn, as the number depends on what code is generated by the compiler for the start of stub_segv_handler(). What we need is esp containing the address of sigcontext. So we explicitly load that pointer into esp.
Signed-off-by: Bodo Stroesser <[EMAIL PROTECTED]> Signed-off-by: Jeff Dike <[EMAIL PROTECTED]> Index: linux-2.6.12-rc3-mm2/arch/um/sys-i386/stub_segv.c =================================================================== --- linux-2.6.12-rc3-mm2.orig/arch/um/sys-i386/stub_segv.c 2005-07-27 17:22:18.000000000 -0400 +++ linux-2.6.12-rc3-mm2/arch/um/sys-i386/stub_segv.c 2005-07-28 10:35:18.000000000 -0400 @@ -21,10 +21,10 @@ __asm__("movl %0, %%eax ; int $0x80": : "g" (__NR_getpid)); __asm__("movl %%eax, %%ebx ; movl %0, %%eax ; movl %1, %%ecx ;" "int $0x80": : "g" (__NR_kill), "g" (SIGUSR1)); - /* Pop the frame pointer and return address since we need to leave + /* Load pointer to sigcontext into esp, since we need to leave * the stack in its original form when we do the sigreturn here, by * hand. */ - __asm__("popl %%eax ; popl %%eax ; popl %%eax ; movl %0, %%eax ; " - "int $0x80" : : "g" (__NR_sigreturn)); + __asm__("mov %0,%%esp ; movl %1, %%eax ; " + "int $0x80" : : "a" (sc), "g" (__NR_sigreturn)); } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/