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| author | Brian Gerst <brgerst@gmail.com> | 2020-03-13 20:51:41 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-03-21 16:03:24 +0100 |
| commit | 121b32a58a3af89a780cf194ce3769fc4120e574 (patch) | |
| tree | 17d48338ad3f310e8893d3f06603e21b64e683b0 /arch/x86/include | |
| parent | x86/entry/32: Rename 32-bit specific syscalls (diff) | |
| download | linux-121b32a58a3af89a780cf194ce3769fc4120e574.tar.xz linux-121b32a58a3af89a780cf194ce3769fc4120e574.zip | |
x86/entry/32: Use IA32-specific wrappers for syscalls taking 64-bit arguments
For the 32-bit syscall interface, 64-bit arguments (loff_t) are passed via
a pair of 32-bit registers. These register pairs end up in consecutive stack
slots, which matches the C ABI for 64-bit arguments. But when accessing the
registers directly from pt_regs, the wrapper needs to manually reassemble the
64-bit value. These wrappers already exist for 32-bit compat, so make them
available to 32-bit native in preparation for enabling pt_regs-based syscalls.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
Link: https://lkml.kernel.org/r/20200313195144.164260-16-brgerst@gmail.com
Diffstat (limited to 'arch/x86/include')
0 files changed, 0 insertions, 0 deletions