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Handle NULL argp/envp in execve syscall.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4627 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2008-05-30 18:24:00 +00:00
parent f0cbb61333
commit da94d26390
1 changed files with 4 additions and 4 deletions
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8
linux-user/syscall.c
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@ -3248,7 +3248,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
argc = 0;
guest_argp = arg2;
for (gp = guest_argp; ; gp += sizeof(abi_ulong)) {
for (gp = guest_argp; gp; gp += sizeof(abi_ulong)) {
if (get_user_ual(addr, gp))
goto efault;
if (!addr)
@ -3257,7 +3257,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
}
envc = 0;
guest_envp = arg3;
for (gp = guest_envp; ; gp += sizeof(abi_ulong)) {
for (gp = guest_envp; gp; gp += sizeof(abi_ulong)) {
if (get_user_ual(addr, gp))
goto efault;
if (!addr)
@ -3268,7 +3268,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
argp = alloca((argc + 1) * sizeof(void *));
envp = alloca((envc + 1) * sizeof(void *));
for (gp = guest_argp, q = argp; ;
for (gp = guest_argp, q = argp; gp;
gp += sizeof(abi_ulong), q++) {
if (get_user_ual(addr, gp))
goto execve_efault;
@ -3279,7 +3279,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
}
*q = NULL;
for (gp = guest_envp, q = envp; ;
for (gp = guest_envp, q = envp; gp;
gp += sizeof(abi_ulong), q++) {
if (get_user_ual(addr, gp))
goto execve_efault;