Messages in this thread Patch in this message | | | Subject | [patch 5/8] uml: fix "cond. expr. as lvalues" warning | From | blaisorblade@yahoo ... | Date | Wed, 30 Mar 2005 19:33:55 +0200 |
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From: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Gcc 3.4.3 (and probably any 3.4) emits some "deprecation" warnings currently about usages of CHOOSE_MODE, since the below syntax has been deprecated:
(a ? foo: bar) = foobar; which often results from expansion of: CHOOSE_MODE(foo, bar) = foobar;
So add an additional __CHOOSE_MODE syntax for users which need to get a lvalue, which uses (a ? &foo : &bar) inside a function, casts the result to the correct type and dereference the pointer, and use it where needed (i.e. in <sysdep/ptrace.h>)
The patch builds and runs correctly (this has been tested on i386 only, not on x86_64), and removes all the warnings.
Updated from last sent version to work also when only one mode (TT or SKAS) is enabled.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> ---
linux-2.6.11-paolo/arch/um/include/choose-mode.h | 12 ++ linux-2.6.11-paolo/arch/um/include/sysdep-i386/ptrace.h | 36 ++++---- linux-2.6.11-paolo/arch/um/include/sysdep-x86_64/ptrace.h | 58 +++++++------- 3 files changed, 59 insertions(+), 47 deletions(-)
diff -puN arch/um/include/choose-mode.h~uml-fix-cond-expr-as-lvalues arch/um/include/choose-mode.h --- linux-2.6.11/arch/um/include/choose-mode.h~uml-fix-cond-expr-as-lvalues 2005-03-27 20:55:12.000000000 +0200 +++ linux-2.6.11-paolo/arch/um/include/choose-mode.h 2005-03-27 20:55:45.000000000 +0200 @@ -11,6 +11,14 @@ #if defined(UML_CONFIG_MODE_TT) && defined(UML_CONFIG_MODE_SKAS) #define CHOOSE_MODE(tt, skas) (mode_tt ? (tt) : (skas)) +extern int mode_tt; + +static inline void *__choose_mode(void *tt, void *skas) { + return mode_tt ? tt : skas; +} + +#define __CHOOSE_MODE(tt, skas) (*( (typeof(tt) *) __choose_mode(&(tt), &(skas)))) + #elif defined(UML_CONFIG_MODE_SKAS) #define CHOOSE_MODE(tt, skas) (skas) @@ -21,6 +29,10 @@ #define CHOOSE_MODE_PROC(tt, skas, args...) \ CHOOSE_MODE(tt(args), skas(args)) +#ifndef __CHOOSE_MODE +#define __CHOOSE_MODE(tt, skas) CHOOSE_MODE(tt, skas) +#endif + #endif /* diff -puN arch/um/include/sysdep-i386/ptrace.h~uml-fix-cond-expr-as-lvalues arch/um/include/sysdep-i386/ptrace.h --- linux-2.6.11/arch/um/include/sysdep-i386/ptrace.h~uml-fix-cond-expr-as-lvalues 2005-03-27 20:55:12.000000000 +0200 +++ linux-2.6.11-paolo/arch/um/include/sysdep-i386/ptrace.h 2005-03-27 20:55:12.000000000 +0200 @@ -93,39 +93,39 @@ extern int mode_tt; #define UPT_SC(r) ((r)->tt.sc) #define UPT_IP(r) \ - CHOOSE_MODE(SC_IP(UPT_SC(r)), REGS_IP((r)->skas.regs)) + __CHOOSE_MODE(SC_IP(UPT_SC(r)), REGS_IP((r)->skas.regs)) #define UPT_SP(r) \ - CHOOSE_MODE(SC_SP(UPT_SC(r)), REGS_SP((r)->skas.regs)) + __CHOOSE_MODE(SC_SP(UPT_SC(r)), REGS_SP((r)->skas.regs)) #define UPT_EFLAGS(r) \ - CHOOSE_MODE(SC_EFLAGS(UPT_SC(r)), REGS_EFLAGS((r)->skas.regs)) + __CHOOSE_MODE(SC_EFLAGS(UPT_SC(r)), REGS_EFLAGS((r)->skas.regs)) #define UPT_EAX(r) \ - CHOOSE_MODE(SC_EAX(UPT_SC(r)), REGS_EAX((r)->skas.regs)) + __CHOOSE_MODE(SC_EAX(UPT_SC(r)), REGS_EAX((r)->skas.regs)) #define UPT_EBX(r) \ - CHOOSE_MODE(SC_EBX(UPT_SC(r)), REGS_EBX((r)->skas.regs)) + __CHOOSE_MODE(SC_EBX(UPT_SC(r)), REGS_EBX((r)->skas.regs)) #define UPT_ECX(r) \ - CHOOSE_MODE(SC_ECX(UPT_SC(r)), REGS_ECX((r)->skas.regs)) + __CHOOSE_MODE(SC_ECX(UPT_SC(r)), REGS_ECX((r)->skas.regs)) #define UPT_EDX(r) \ - CHOOSE_MODE(SC_EDX(UPT_SC(r)), REGS_EDX((r)->skas.regs)) + __CHOOSE_MODE(SC_EDX(UPT_SC(r)), REGS_EDX((r)->skas.regs)) #define UPT_ESI(r) \ - CHOOSE_MODE(SC_ESI(UPT_SC(r)), REGS_ESI((r)->skas.regs)) + __CHOOSE_MODE(SC_ESI(UPT_SC(r)), REGS_ESI((r)->skas.regs)) #define UPT_EDI(r) \ - CHOOSE_MODE(SC_EDI(UPT_SC(r)), REGS_EDI((r)->skas.regs)) + __CHOOSE_MODE(SC_EDI(UPT_SC(r)), REGS_EDI((r)->skas.regs)) #define UPT_EBP(r) \ - CHOOSE_MODE(SC_EBP(UPT_SC(r)), REGS_EBP((r)->skas.regs)) + __CHOOSE_MODE(SC_EBP(UPT_SC(r)), REGS_EBP((r)->skas.regs)) #define UPT_ORIG_EAX(r) \ - CHOOSE_MODE((r)->tt.syscall, (r)->skas.syscall) + __CHOOSE_MODE((r)->tt.syscall, (r)->skas.syscall) #define UPT_CS(r) \ - CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs)) + __CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs)) #define UPT_SS(r) \ - CHOOSE_MODE(SC_SS(UPT_SC(r)), REGS_SS((r)->skas.regs)) + __CHOOSE_MODE(SC_SS(UPT_SC(r)), REGS_SS((r)->skas.regs)) #define UPT_DS(r) \ - CHOOSE_MODE(SC_DS(UPT_SC(r)), REGS_DS((r)->skas.regs)) + __CHOOSE_MODE(SC_DS(UPT_SC(r)), REGS_DS((r)->skas.regs)) #define UPT_ES(r) \ - CHOOSE_MODE(SC_ES(UPT_SC(r)), REGS_ES((r)->skas.regs)) + __CHOOSE_MODE(SC_ES(UPT_SC(r)), REGS_ES((r)->skas.regs)) #define UPT_FS(r) \ - CHOOSE_MODE(SC_FS(UPT_SC(r)), REGS_FS((r)->skas.regs)) + __CHOOSE_MODE(SC_FS(UPT_SC(r)), REGS_FS((r)->skas.regs)) #define UPT_GS(r) \ - CHOOSE_MODE(SC_GS(UPT_SC(r)), REGS_GS((r)->skas.regs)) + __CHOOSE_MODE(SC_GS(UPT_SC(r)), REGS_GS((r)->skas.regs)) #define UPT_SYSCALL_ARG1(r) UPT_EBX(r) #define UPT_SYSCALL_ARG2(r) UPT_ECX(r) @@ -222,7 +222,7 @@ struct syscall_args { REGS_SEGV_IS_FIXABLE(&r->skas)) #define UPT_FAULT_ADDR(r) \ - CHOOSE_MODE(SC_FAULT_ADDR(UPT_SC(r)), REGS_FAULT_ADDR(&r->skas)) + __CHOOSE_MODE(SC_FAULT_ADDR(UPT_SC(r)), REGS_FAULT_ADDR(&r->skas)) #define UPT_FAULT_WRITE(r) \ CHOOSE_MODE(SC_FAULT_WRITE(UPT_SC(r)), REGS_FAULT_WRITE(&r->skas)) diff -puN arch/um/include/sysdep-x86_64/ptrace.h~uml-fix-cond-expr-as-lvalues arch/um/include/sysdep-x86_64/ptrace.h --- linux-2.6.11/arch/um/include/sysdep-x86_64/ptrace.h~uml-fix-cond-expr-as-lvalues 2005-03-27 20:55:12.000000000 +0200 +++ linux-2.6.11-paolo/arch/um/include/sysdep-x86_64/ptrace.h 2005-03-27 20:55:12.000000000 +0200 @@ -104,37 +104,37 @@ union uml_pt_regs { /* XXX */ extern int mode_tt; -#define UPT_RBX(r) CHOOSE_MODE(SC_RBX(UPT_SC(r)), REGS_RBX((r)->skas.regs)) -#define UPT_RCX(r) CHOOSE_MODE(SC_RCX(UPT_SC(r)), REGS_RCX((r)->skas.regs)) -#define UPT_RDX(r) CHOOSE_MODE(SC_RDX(UPT_SC(r)), REGS_RDX((r)->skas.regs)) -#define UPT_RSI(r) CHOOSE_MODE(SC_RSI(UPT_SC(r)), REGS_RSI((r)->skas.regs)) -#define UPT_RDI(r) CHOOSE_MODE(SC_RDI(UPT_SC(r)), REGS_RDI((r)->skas.regs)) -#define UPT_RBP(r) CHOOSE_MODE(SC_RBP(UPT_SC(r)), REGS_RBP((r)->skas.regs)) -#define UPT_RAX(r) CHOOSE_MODE(SC_RAX(UPT_SC(r)), REGS_RAX((r)->skas.regs)) -#define UPT_R8(r) CHOOSE_MODE(SC_R8(UPT_SC(r)), REGS_R8((r)->skas.regs)) -#define UPT_R9(r) CHOOSE_MODE(SC_R9(UPT_SC(r)), REGS_R9((r)->skas.regs)) -#define UPT_R10(r) CHOOSE_MODE(SC_R10(UPT_SC(r)), REGS_R10((r)->skas.regs)) -#define UPT_R11(r) CHOOSE_MODE(SC_R11(UPT_SC(r)), REGS_R11((r)->skas.regs)) -#define UPT_R12(r) CHOOSE_MODE(SC_R12(UPT_SC(r)), REGS_R12((r)->skas.regs)) -#define UPT_R13(r) CHOOSE_MODE(SC_R13(UPT_SC(r)), REGS_R13((r)->skas.regs)) -#define UPT_R14(r) CHOOSE_MODE(SC_R14(UPT_SC(r)), REGS_R14((r)->skas.regs)) -#define UPT_R15(r) CHOOSE_MODE(SC_R15(UPT_SC(r)), REGS_R15((r)->skas.regs)) -#define UPT_CS(r) CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs)) -#define UPT_FS(r) CHOOSE_MODE(SC_FS(UPT_SC(r)), REGS_FS((r)->skas.regs)) -#define UPT_GS(r) CHOOSE_MODE(SC_GS(UPT_SC(r)), REGS_GS((r)->skas.regs)) -#define UPT_DS(r) CHOOSE_MODE(SC_DS(UPT_SC(r)), REGS_DS((r)->skas.regs)) -#define UPT_ES(r) CHOOSE_MODE(SC_ES(UPT_SC(r)), REGS_ES((r)->skas.regs)) -#define UPT_CS(r) CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs)) +#define UPT_RBX(r) __CHOOSE_MODE(SC_RBX(UPT_SC(r)), REGS_RBX((r)->skas.regs)) +#define UPT_RCX(r) __CHOOSE_MODE(SC_RCX(UPT_SC(r)), REGS_RCX((r)->skas.regs)) +#define UPT_RDX(r) __CHOOSE_MODE(SC_RDX(UPT_SC(r)), REGS_RDX((r)->skas.regs)) +#define UPT_RSI(r) __CHOOSE_MODE(SC_RSI(UPT_SC(r)), REGS_RSI((r)->skas.regs)) +#define UPT_RDI(r) __CHOOSE_MODE(SC_RDI(UPT_SC(r)), REGS_RDI((r)->skas.regs)) +#define UPT_RBP(r) __CHOOSE_MODE(SC_RBP(UPT_SC(r)), REGS_RBP((r)->skas.regs)) +#define UPT_RAX(r) __CHOOSE_MODE(SC_RAX(UPT_SC(r)), REGS_RAX((r)->skas.regs)) +#define UPT_R8(r) __CHOOSE_MODE(SC_R8(UPT_SC(r)), REGS_R8((r)->skas.regs)) +#define UPT_R9(r) __CHOOSE_MODE(SC_R9(UPT_SC(r)), REGS_R9((r)->skas.regs)) +#define UPT_R10(r) __CHOOSE_MODE(SC_R10(UPT_SC(r)), REGS_R10((r)->skas.regs)) +#define UPT_R11(r) __CHOOSE_MODE(SC_R11(UPT_SC(r)), REGS_R11((r)->skas.regs)) +#define UPT_R12(r) __CHOOSE_MODE(SC_R12(UPT_SC(r)), REGS_R12((r)->skas.regs)) +#define UPT_R13(r) __CHOOSE_MODE(SC_R13(UPT_SC(r)), REGS_R13((r)->skas.regs)) +#define UPT_R14(r) __CHOOSE_MODE(SC_R14(UPT_SC(r)), REGS_R14((r)->skas.regs)) +#define UPT_R15(r) __CHOOSE_MODE(SC_R15(UPT_SC(r)), REGS_R15((r)->skas.regs)) +#define UPT_CS(r) __CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs)) +#define UPT_FS(r) __CHOOSE_MODE(SC_FS(UPT_SC(r)), REGS_FS((r)->skas.regs)) +#define UPT_GS(r) __CHOOSE_MODE(SC_GS(UPT_SC(r)), REGS_GS((r)->skas.regs)) +#define UPT_DS(r) __CHOOSE_MODE(SC_DS(UPT_SC(r)), REGS_DS((r)->skas.regs)) +#define UPT_ES(r) __CHOOSE_MODE(SC_ES(UPT_SC(r)), REGS_ES((r)->skas.regs)) +#define UPT_CS(r) __CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs)) #define UPT_ORIG_RAX(r) \ - CHOOSE_MODE((r)->tt.orig_rax, REGS_ORIG_RAX((r)->skas.regs)) + __CHOOSE_MODE((r)->tt.orig_rax, REGS_ORIG_RAX((r)->skas.regs)) -#define UPT_IP(r) CHOOSE_MODE(SC_IP(UPT_SC(r)), REGS_IP((r)->skas.regs)) -#define UPT_SP(r) CHOOSE_MODE(SC_SP(UPT_SC(r)), REGS_SP((r)->skas.regs)) +#define UPT_IP(r) __CHOOSE_MODE(SC_IP(UPT_SC(r)), REGS_IP((r)->skas.regs)) +#define UPT_SP(r) __CHOOSE_MODE(SC_SP(UPT_SC(r)), REGS_SP((r)->skas.regs)) #define UPT_EFLAGS(r) \ - CHOOSE_MODE(SC_EFLAGS(UPT_SC(r)), REGS_EFLAGS((r)->skas.regs)) + __CHOOSE_MODE(SC_EFLAGS(UPT_SC(r)), REGS_EFLAGS((r)->skas.regs)) #define UPT_SC(r) ((r)->tt.sc) -#define UPT_SYSCALL_NR(r) CHOOSE_MODE((r)->tt.syscall, (r)->skas.syscall) +#define UPT_SYSCALL_NR(r) __CHOOSE_MODE((r)->tt.syscall, (r)->skas.syscall) extern int user_context(unsigned long sp); @@ -242,13 +242,13 @@ struct syscall_args { REGS_SEGV_IS_FIXABLE(&r->skas)) #define UPT_FAULT_ADDR(r) \ - CHOOSE_MODE(SC_FAULT_ADDR(UPT_SC(r)), REGS_FAULT_ADDR(&r->skas)) + __CHOOSE_MODE(SC_FAULT_ADDR(UPT_SC(r)), REGS_FAULT_ADDR(&r->skas)) #define UPT_FAULT_WRITE(r) \ CHOOSE_MODE(SC_FAULT_WRITE(UPT_SC(r)), REGS_FAULT_WRITE(&r->skas)) -#define UPT_TRAP(r) CHOOSE_MODE(SC_TRAP_TYPE(UPT_SC(r)), REGS_TRAP(&r->skas)) -#define UPT_ERR(r) CHOOSE_MODE(SC_FAULT_TYPE(UPT_SC(r)), REGS_ERR(&r->skas)) +#define UPT_TRAP(r) __CHOOSE_MODE(SC_TRAP_TYPE(UPT_SC(r)), REGS_TRAP(&r->skas)) +#define UPT_ERR(r) __CHOOSE_MODE(SC_FAULT_TYPE(UPT_SC(r)), REGS_ERR(&r->skas)) #endif _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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