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linux-user: Minimum Sig Handler Stack Size for PPC64 ELF V2

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The ELF V2 ABI for PPC64 defines MINSIGSTKSZ as 4096 bytes whereas it was
2048 previously.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Tom Musta 2014-08-12 13:53:40 -05:00 • committed by Riku Voipio
parent 67d6d829cd
commit 0903c8be9e
18 changed files with 34 additions and 1 deletions
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12
linux-user/signal.c
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@ -617,6 +617,15 @@ abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
{
struct target_sigaltstack *uss;
struct target_sigaltstack ss;
size_t minstacksize = TARGET_MINSIGSTKSZ;
#if defined(TARGET_PPC64)
/* ELF V2 for PPC64 has a 4K minimum stack size for signal handlers */
struct image_info *image = ((TaskState *)thread_cpu->opaque)->info;
if (get_ppc64_abi(image) > 1) {
minstacksize = 4096;
}
#endif
ret = -TARGET_EFAULT;
if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)) {
@ -642,8 +651,9 @@ abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
ss.ss_sp = 0;
} else {
ret = -TARGET_ENOMEM;
if (ss.ss_size < MINSIGSTKSZ)
if (ss.ss_size < minstacksize) {
goto out;
}
}
target_sigaltstack_used.ss_sp = ss.ss_sp;