[Ltrace-devel] [PATCH] On ppc64, argument are pointed by register r3. On ppc64Le, Aggregates or unions of any length, and character strings of length longer than 8 bytes, are returned in a storage buffer passed as a hidden first arg in r3, causing the first explicit argument to be passed in r4.

Tue, 05 Apr 2016 00:26:56 -0700 

From: Thierry Fauck <[email protected]>

Signed-off-by: Thierry Fauck <[email protected]>

        modified:   sysdeps/linux-gnu/ppc/fetch.c
---
 sysdeps/linux-gnu/ppc/fetch.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sysdeps/linux-gnu/ppc/fetch.c b/sysdeps/linux-gnu/ppc/fetch.c
index 860cb86..133f953 100644
--- a/sysdeps/linux-gnu/ppc/fetch.c
+++ b/sysdeps/linux-gnu/ppc/fetch.c
@@ -610,7 +610,7 @@ arch_fetch_retval(struct fetch_context *ctx, enum tof type,
                assert(info->type == ARGTYPE_STRUCT);
 
                uint64_t addr;
-               if ( ctx->regs.r32[1] == 0 )
+               if ( ppc64_call_elf_abi != 2 || ctx->regs.r32[1] == 0 )
                         addr = read_gpr(ctx, proc, 3);
                 else
                         addr = read_gpr(ctx, proc, 4);
-- 
1.8.3.1


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