Hello All,
the appended patch fixes the case where a ELF Linux binary has a
zero-sized .bss, or none at all.
Thiemo
Index: qemu-work/linux-user/elfload.c
===================================================================
--- qemu-work.orig/linux-user/elfload.c 2006-12-12 18:25:00.000000000 +0000
+++ qemu-work/linux-user/elfload.c 2006-12-12 18:33:08.000000000 +0000
@@ -553,10 +553,13 @@
/* We need to explicitly zero any fractional pages after the data
section (i.e. bss). This would contain the junk from the file that
should not be in memory. */
-static void padzero(unsigned long elf_bss)
+static void padzero(unsigned long elf_bss, unsigned long last_bss)
{
unsigned long nbyte;
+ if (elf_bss >= last_bss)
+ return;
+
/* XXX: this is really a hack : if the real host page size is
smaller than the target page size, some pages after the end
of the file may not be mapped. A better fix would be to
@@ -798,7 +801,7 @@
* that there are zeromapped pages up to and including the last
* bss page.
*/
- padzero(elf_bss);
+ padzero(elf_bss, last_bss);
elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /*
What we have mapped so far */
/* Map the last of the bss segment */
@@ -1227,7 +1230,7 @@
sections */
set_brk(elf_bss, elf_brk);
- padzero(elf_bss);
+ padzero(elf_bss, elf_brk);
#if 0
printf("(start_brk) %x\n" , info->start_brk);
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