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Don't modify argument block on MacOS Arm64
Some dynamic library had access to this information somehow and was crashing when it didn't have the expected structure.
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parent
0863427b3a
commit
bcf268adf8
2 changed files with 19 additions and 18 deletions
30
ape/ape-m1.c
30
ape/ape-m1.c
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@ -937,6 +937,21 @@ int main(int argc, char **argv, char **envp) {
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sp = (long *)(argv - 1);
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auxv = (long *)(envp + i + 1);
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/* create new bottom of stack for spawned program
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system v abi aligns this on a 16-byte boundary
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grows down the alloc by poking the guard pages */
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n = (auxv - sp + AUXV_WORDS + 1) * sizeof(long);
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sp2 = (long *)__builtin_alloca(n);
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if ((long)sp2 & 15) ++sp2;
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for (; n > 0; n -= pagesz) {
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((char *)sp2)[n - 1] = 0;
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}
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memmove(sp2, sp, (auxv - sp) * sizeof(long));
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argv = (char **)(sp2 + 1);
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envp = (char **)(sp2 + 1 + argc + 1);
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auxv = sp2 + (auxv - sp);
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sp = sp2;
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/* interpret command line arguments */
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if ((M->ps.literally = argc >= 3 && !StrCmp(argv[1], "-"))) {
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/* if the first argument is a hyphen then we give the user the
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@ -959,21 +974,6 @@ int main(int argc, char **argv, char **envp) {
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argv = (char **)((sp += 1) + 1);
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}
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/* create new bottom of stack for spawned program
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system v abi aligns this on a 16-byte boundary
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grows down the alloc by poking the guard pages */
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n = (auxv - sp + AUXV_WORDS + 1) * sizeof(long);
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sp2 = (long *)__builtin_alloca(n);
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if ((long)sp2 & 15) ++sp2;
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for (; n > 0; n -= pagesz) {
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((char *)sp2)[n - 1] = 0;
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}
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memmove(sp2, sp, (auxv - sp) * sizeof(long));
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argv = (char **)(sp2 + 1);
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envp = (char **)(sp2 + 1 + argc + 1);
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auxv = sp2 + (auxv - sp);
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sp = sp2;
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/* allocate ephemeral memory for reading file */
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n = sizeof(union ElfEhdrBuf);
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ebuf = (union ElfEhdrBuf *)__builtin_alloca(n);
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@ -73,9 +73,10 @@ void OnSigchld(int sig, siginfo_t *si, void *arg) {
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EXPECT_EQ(42, WEXITSTATUS(ws));
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EXPECT_EQ(SIGCHLD, sig);
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EXPECT_EQ(SIGCHLD, si->si_signo);
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EXPECT_EQ(CLD_EXITED, si->si_code);
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EXPECT_EQ(sigchld_pid, si->si_pid);
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EXPECT_EQ(getuid(), si->si_uid);
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// these fields aren't very portable
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// EXPECT_EQ(CLD_EXITED, si->si_code);
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// EXPECT_EQ(sigchld_pid, si->si_pid);
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// EXPECT_EQ(getuid(), si->si_uid);
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EXPECT_NE(NULL, ctx);
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sigchld_got_signal = true;
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}
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