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| author | Helge Deller <deller@gmx.de> | 2022-09-24 13:44:57 +0200 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2022-09-27 09:33:19 +0200 |
| commit | 47393189ce9e23b560865e361f4ab8fb93a904d0 (patch) | |
| tree | 563e725de347a268c20d2f1eaf0c94827dccb993 /linux-user/hppa/target_signal.h | |
| parent | 785783bab1ae879817a26f6757a997ebdc5e89c5 (diff) | |
| download | qemu-47393189ce9e23b560865e361f4ab8fb93a904d0.zip qemu-47393189ce9e23b560865e361f4ab8fb93a904d0.tar.gz qemu-47393189ce9e23b560865e361f4ab8fb93a904d0.tar.bz2 | |
linux-user/hppa: Add signal trampoline for hppa target
In Linux kernel v5.18 the vDSO for signal trampoline was added.
This code mimiks the bare minimum of this vDSO and thus avoids that the
parisc emulation needs executable stacks.
Signed-off-by: Helge Deller <deller@gmx.de>
Message-Id: <20220924114501.21767-4-deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'linux-user/hppa/target_signal.h')
| -rw-r--r-- | linux-user/hppa/target_signal.h | 14 |
1 files changed, 1 insertions, 13 deletions
diff --git a/linux-user/hppa/target_signal.h b/linux-user/hppa/target_signal.h index af6c2fc..190bb3d 100644 --- a/linux-user/hppa/target_signal.h +++ b/linux-user/hppa/target_signal.h @@ -70,18 +70,6 @@ typedef struct target_sigaltstack { /* mask for all SS_xxx flags */ #define TARGET_SS_FLAG_BITS TARGET_SS_AUTODISARM -/* - * We cannot use a bare sigtramp page for hppa-linux. - * - * Unlike other guests where we use the instructions at PC to validate - * an offset from SP, the hppa libgcc signal frame fallback unwinding uses - * the PC address itself to find the frame. This is due to the fact that - * the hppa grows the stack upward, and the frame is of unknown size. - * - * TODO: We should be able to use a VDSO to address this, by providing - * proper unwind info for the sigtramp code, at which point the fallback - * unwinder will not be used. - */ -#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 0 +#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 1 #endif /* HPPA_TARGET_SIGNAL_H */ |