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axeld + bonefish:

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After exec() we re-entered the userland without removing the syscall
iframe from the iframe stack, thus leaking one stack slot.
Fixes bug #1304.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21783 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2007-08-02 02:37:35 +00:00
parent 62db84dc99
commit e786c1d6a9
1 changed files with 4 additions and 0 deletions
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4
src/system/kernel/arch/x86/arch_thread.c
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@ -334,6 +334,10 @@ arch_thread_enter_userspace(struct thread *t, addr_t entry, void *args1, void *a
disable_interrupts();
// When entering the userspace, the iframe stack needs to be empty. After
// an exec() it'll still contain the iframe from the syscall, though.
t->arch_info.iframes.index = 0;
i386_set_tss_and_kstack(t->kernel_stack_base + KERNEL_STACK_SIZE);
// set the CPU dependent GDT entry for TLS