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Zero out to three stack dwords to fix boot errors

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This commit is contained in:
Erik van der Kouwe 2010-08-24 12:51:11 +00:00
parent 6fb1789ba4
commit 50ca7f7f8f
1 changed files with 7 additions and 1 deletions
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8
kernel/main.c
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@ -38,6 +38,7 @@ PUBLIC int main(void)
vir_clicks text_clicks, data_clicks, st_clicks; vir_clicks text_clicks, data_clicks, st_clicks;
reg_t ktsb; /* kernel task stack base */ reg_t ktsb; /* kernel task stack base */
struct exec e_hdr; /* for a copy of an a.out header */ struct exec e_hdr; /* for a copy of an a.out header */
size_t argsz; /* size of arguments passed to crtso on stack */
/* Global value to test segment sanity. */ /* Global value to test segment sanity. */
magictest = MAGICTEST; magictest = MAGICTEST;
@ -189,7 +190,12 @@ PUBLIC int main(void)
if (isusern(proc_nr)) { /* user-space process? */ if (isusern(proc_nr)) { /* user-space process? */
rp->p_reg.sp = (rp->p_memmap[S].mem_vir + rp->p_reg.sp = (rp->p_memmap[S].mem_vir +
rp->p_memmap[S].mem_len) << CLICK_SHIFT; rp->p_memmap[S].mem_len) << CLICK_SHIFT;
rp->p_reg.sp -= 3 * sizeof(reg_t); argsz = 3 * sizeof(reg_t);
rp->p_reg.sp -= argsz;
phys_memset(rp->p_reg.sp -
(rp->p_memmap[S].mem_vir << CLICK_SHIFT) +
(rp->p_memmap[S].mem_phys << CLICK_SHIFT),
0, argsz);
} }
/* scheduling functions depend on proc_ptr pointing somewhere. */ /* scheduling functions depend on proc_ptr pointing somewhere. */