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common-user/host/sparc64: Fix safe_syscall_base

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Use the "retl" instead of "ret" instruction alias, since we
do not allocate a register window in this function.

Fix the offset to the first stacked parameter, which lies
beyond the register window save area.

Fixes: 95c021dac8 ("linux-user/host/sparc64: Add safe-syscall.inc.S")
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-02-08 05:54:29 +03:00
parent 0a301624c2
commit 620d0b49a4
1 changed files with 3 additions and 2 deletions
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5
common-user/host/sparc64/safe-syscall.inc.S
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@ -24,7 +24,8 @@
.type safe_syscall_end, @function .type safe_syscall_end, @function
#define STACK_BIAS 2047 #define STACK_BIAS 2047
#define PARAM(N) STACK_BIAS + N*8 #define WINDOW_SIZE 16 * 8
#define PARAM(N) STACK_BIAS + WINDOW_SIZE + N * 8
/* /*
* This is the entry point for making a system call. The calling * This is the entry point for making a system call. The calling
@ -74,7 +75,7 @@ safe_syscall_end:
/* code path for having successfully executed the syscall */ /* code path for having successfully executed the syscall */
bcs,pn %xcc, 1f bcs,pn %xcc, 1f
nop nop
ret retl
nop nop
/* code path when we didn't execute the syscall */ /* code path when we didn't execute the syscall */