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2003-10-10 Elena Zannoni <ezannoni@redhat.com>
* sh-tdep.c (sh_use_struct_convention): Clarify one case in comment.
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2003-10-10 Elena Zannoni <ezannoni@redhat.com>
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* sh-tdep.c (sh_use_struct_convention): Clarify one case in
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comment.
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2003-10-10 Corinna Vinschen <vinschen@redhat.com>
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2003-10-10 Corinna Vinschen <vinschen@redhat.com>
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* sh-tdep.c (sh_use_struct_convention): Clean up to have a
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* sh-tdep.c (sh_use_struct_convention): Clean up to have a
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@ -568,7 +568,7 @@ sh_skip_prologue (CORE_ADDR start_pc)
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All other aggregate types are returned by address. The caller
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All other aggregate types are returned by address. The caller
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function passes the address of an area large enough to hold the
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function passes the address of an area large enough to hold the
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aggregate value in R2. The called function stores the result in
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aggregate value in R2. The called function stores the result in
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this location."
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this location.
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To reiterate, structs smaller than 8 bytes could also be returned
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To reiterate, structs smaller than 8 bytes could also be returned
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in memory, if they don't pass the "same size and alignment as an
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in memory, if they don't pass the "same size and alignment as an
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@ -582,6 +582,16 @@ sh_skip_prologue (CORE_ADDR start_pc)
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the return value from foo() will be in memory, not
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the return value from foo() will be in memory, not
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in R0, because there is no 3-byte integer type.
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in R0, because there is no 3-byte integer type.
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Similarly, in
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struct s { char c[2]; } wibble;
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struct s foo(void) { return wibble; }
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because a struct containing two chars has alignment 1, that matches
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type char, but size 2, that matches type short. There's no integer
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type that has alignment 1 and size 2, so the struct is returned in
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memory.
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*/
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*/
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static int
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static int
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