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| author | Richard Henderson | 2022-01-04 20:00:35 +0100 |
|---|---|---|
| committer | Richard Henderson | 2022-01-05 00:41:03 +0100 |
| commit | d7478d4229f0a2b2817a55487e6b17081099fae4 (patch) | |
| tree | ca20b264e8da395cfec86b0b37ea329c656e252f | |
| parent | sysemu: Cleanup qemu_run_machine_init_done_notifiers() (diff) | |
| download | qemu-d7478d4229f0a2b2817a55487e6b17081099fae4.tar.gz qemu-d7478d4229f0a2b2817a55487e6b17081099fae4.tar.xz qemu-d7478d4229f0a2b2817a55487e6b17081099fae4.zip | |
common-user: Fix tail calls to safe_syscall_set_errno_tail
For the ABIs in which the syscall return register is not
also the first function argument register, move the errno
value into the correct place.
Fixes: a3310c0397e2 ("linux-user: Move syscall error detection into safe_syscall_base")
Reported-by: Laurent Vivier <laurent@vivier.eu>
Tested-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220104190454.542225-1-richard.henderson@linaro.org>
| -rw-r--r-- | common-user/host/i386/safe-syscall.inc.S | 1 | ||||
| -rw-r--r-- | common-user/host/mips/safe-syscall.inc.S | 1 | ||||
| -rw-r--r-- | common-user/host/x86_64/safe-syscall.inc.S | 1 |
3 files changed, 3 insertions, 0 deletions
diff --git a/common-user/host/i386/safe-syscall.inc.S b/common-user/host/i386/safe-syscall.inc.S index baf5400a29..9c45e56e48 100644 --- a/common-user/host/i386/safe-syscall.inc.S +++ b/common-user/host/i386/safe-syscall.inc.S @@ -120,6 +120,7 @@ safe_syscall_end: pop %ebp .cfi_adjust_cfa_offset -4 .cfi_restore ebp + mov %eax, (%esp) jmp safe_syscall_set_errno_tail .cfi_endproc diff --git a/common-user/host/mips/safe-syscall.inc.S b/common-user/host/mips/safe-syscall.inc.S index fc75a337d1..6a44614970 100644 --- a/common-user/host/mips/safe-syscall.inc.S +++ b/common-user/host/mips/safe-syscall.inc.S @@ -141,6 +141,7 @@ safe_syscall_end: 1: USE_ALT_CP(t0) SETUP_GPX(t1) SETUP_GPX64(t0, t1) + move a0, v0 PTR_LA t9, safe_syscall_set_errno_tail jr t9 diff --git a/common-user/host/x86_64/safe-syscall.inc.S b/common-user/host/x86_64/safe-syscall.inc.S index a20927a783..d1a67a303a 100644 --- a/common-user/host/x86_64/safe-syscall.inc.S +++ b/common-user/host/x86_64/safe-syscall.inc.S @@ -99,6 +99,7 @@ safe_syscall_end: 1: pop %rbp .cfi_def_cfa_offset 8 .cfi_restore rbp + mov %eax, %edi jmp safe_syscall_set_errno_tail .cfi_endproc |