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power: Add the AT_RANDOM aux vector to the initial stack.

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This is blindly used by at least modern glibc-s

Change-Id: I8ee7872c8072ee8aa1b3718e988679968ac172d0
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/26829
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
This commit is contained in:
Gabe Black
2020-03-17 23:57:18 -07:00
parent 695583709b
commit 101c859676
1 changed files with 8 additions and 1 deletions
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9
src/arch/power/process.cc
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@@ -131,6 +131,8 @@ PowerProcess::argsInit(int intSize, int pageSize)
auxv.emplace_back(M5_AT_EGID, egid());
//Whether to enable "secure mode" in the executable
auxv.emplace_back(M5_AT_SECURE, 0);
//The address of 16 "random" bytes
auxv.emplace_back(M5_AT_RANDOM, 0);
//The filename of the program
auxv.emplace_back(M5_AT_EXECFN, 0);
//The string "v51" with unknown meaning
@@ -151,6 +153,9 @@ PowerProcess::argsInit(int intSize, int pageSize)
// string.
int aux_data_size = filename.size() + 1;
const int numRandomBytes = 16;
aux_data_size += numRandomBytes;
int env_data_size = 0;
for (int i = 0; i < envp.size(); ++i) {
env_data_size += envp[i].size() + 1;
@@ -235,8 +240,10 @@ PowerProcess::argsInit(int intSize, int pageSize)
auxv[i].val = platform_base;
initVirtMem->writeString(platform_base, platform.c_str());
} else if (auxv[i].type == M5_AT_EXECFN) {
auxv[i].val = aux_data_base;
auxv[i].val = aux_data_base + numRandomBytes;
initVirtMem->writeString(aux_data_base, filename.c_str());
} else if (auxv[i].type == M5_AT_RANDOM) {
auxv[i].val = aux_data_base;
}
}