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* [PATCH RESEND 0/2] RISC-V: Handle the siginfo_t offset problem
@ 2019-07-03  0:52 Alistair Francis
  2019-07-03  0:52 ` [PATCH RESEND 1/2] uapi/asm-generic: Allow defining a custom __SIGINFO struct Alistair Francis
                   ` (2 more replies)
  0 siblings, 3 replies; 8+ messages in thread
From: Alistair Francis @ 2019-07-03  0:52 UTC (permalink / raw)
  To: linux-riscv, arnd; +Cc: linux-kernel, alistair23, Alistair Francis

Resending the the correct linux-riscv address.

In the RISC-V 32-bit glibc port [1] the siginfo_t struct in the kernel
doesn't line up with the struct in glibc. In glibc world the _sifields
union is 8 byte alligned (although I can't figure out why) while in the
kernel wordl the _sifields union is 4 bytes alligned. This results in
information being lost in the waitid syscall.

This doesn't seem to be a great fix, but it is somewhat similar to what
x32 does (which has 64-bit time_t like RV32) and I can't figure out why
the two allignments are different.

1: https://github.com/alistair23/glibc/commits/alistair/rv32.next

Alistair Francis (2):
  uapi/asm-generic: Allow defining a custom __SIGINFO struct
  riscv/include/uapi: Define a custom __SIGINFO struct for RV32

 arch/riscv/include/uapi/asm/siginfo.h | 32 +++++++++++++++++++++++++++
 include/uapi/asm-generic/siginfo.h    | 32 ++++++++++++++-------------
 2 files changed, 49 insertions(+), 15 deletions(-)
 create mode 100644 arch/riscv/include/uapi/asm/siginfo.h

-- 
2.22.0


^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2019-07-17  0:06 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-07-03  0:52 [PATCH RESEND 0/2] RISC-V: Handle the siginfo_t offset problem Alistair Francis
2019-07-03  0:52 ` [PATCH RESEND 1/2] uapi/asm-generic: Allow defining a custom __SIGINFO struct Alistair Francis
2019-07-03  0:52 ` [PATCH RESEND 2/2] riscv/include/uapi: Define a custom __SIGINFO struct for RV32 Alistair Francis
2019-07-03  7:08 ` [PATCH RESEND 0/2] RISC-V: Handle the siginfo_t offset problem Andreas Schwab
2019-07-03 18:40   ` Alistair Francis
2019-07-04  7:20     ` Andreas Schwab
2019-07-04  9:19       ` Arnd Bergmann
2019-07-17  0:02         ` Alistair Francis

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