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| author | Tom Musta <tommusta@gmail.com> | 2014-08-12 13:53:40 -0500 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2014-08-22 15:06:35 +0300 |
| commit | 0903c8be9ee7925863c6c50a2096b6e919be861c (patch) | |
| tree | 74f989ee6f0b7f18b8179911d7a41a06a76b748e /linux-user/signal.c | |
| parent | 67d6d829cdc4e76f64162e6ba8861ee527987bd5 (diff) | |
| download | qemu-0903c8be9ee7925863c6c50a2096b6e919be861c.tar.gz | |
linux-user: Minimum Sig Handler Stack Size for PPC64 ELF V2
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>
Diffstat (limited to 'linux-user/signal.c')
| -rw-r--r-- | linux-user/signal.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/linux-user/signal.c b/linux-user/signal.c index 1141054be2..26929c59de 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -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; |