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author | Filip Bozuta <Filip.Bozuta@syrmia.com> | 2020-08-11 18:45:52 +0200 |
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committer | Laurent Vivier <laurent@vivier.eu> | 2020-08-27 12:29:50 +0200 |
commit | 45f567994c2f0272cede9956ed0ea0d8a6294495 (patch) | |
tree | 4c12cb546ff797124a364ad69c5f0d5698298d4b /linux-user | |
parent | 02e5d7d78e423bf8b3ebb66ab36bdaa7e962312a (diff) | |
download | qemu-45f567994c2f0272cede9956ed0ea0d8a6294495.zip qemu-45f567994c2f0272cede9956ed0ea0d8a6294495.tar.gz qemu-45f567994c2f0272cede9956ed0ea0d8a6294495.tar.bz2 |
linux-user: Add an api to print enumareted argument values with strace
This patch introduces a type 'struct enums' and function 'print_enums()'
that can be used to print enumerated argument values of some syscalls
in strace. This can be used in future strace implementations.
Also, macros 'ENUM_GENERIC()', 'ENUM_TARGET()' and 'ENUM_END', are
introduced to enable automatic generation of aproppriate enumarated
values and their repsective string representations (these macros are
exactly the same as 'FLAG_GENERIC()', 'FLAG_TARGET()' and 'FLAG_END').
Future patches are planned to modify all existing print functions in
'strace.c' that print arguments of syscalls with enumerated values to
use this new api.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200811164553.27713-5-Filip.Bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'linux-user')
-rw-r--r-- | linux-user/strace.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/linux-user/strace.c b/linux-user/strace.c index 4ac54ec..d0731b8 100644 --- a/linux-user/strace.c +++ b/linux-user/strace.c @@ -52,9 +52,23 @@ struct flags { /* end of flags array */ #define FLAG_END { 0, NULL } +/* Structure used to translate enumerated values into strings */ +struct enums { + abi_long e_value; /* enum value */ + const char *e_string; /* stringified enum */ +}; + +/* common enums for all architectures */ +#define ENUM_GENERIC(name) { name, #name } +/* target specific enums */ +#define ENUM_TARGET(name) { TARGET_ ## name, #name } +/* end of enums array */ +#define ENUM_END { 0, NULL } + UNUSED static const char *get_comma(int); UNUSED static void print_pointer(abi_long, int); UNUSED static void print_flags(const struct flags *, abi_long, int); +UNUSED static void print_enums(const struct enums *, abi_long, int); UNUSED static void print_at_dirfd(abi_long, int); UNUSED static void print_file_mode(abi_long, int); UNUSED static void print_open_flags(abi_long, int); @@ -1253,6 +1267,23 @@ print_flags(const struct flags *f, abi_long flags, int last) } static void +print_enums(const struct enums *e, abi_long enum_arg, int last) +{ + for (; e->e_string != NULL; e++) { + if (e->e_value == enum_arg) { + qemu_log("%s", e->e_string); + break; + } + } + + if (e->e_string == NULL) { + qemu_log("%#x", (unsigned int)enum_arg); + } + + qemu_log("%s", get_comma(last)); +} + +static void print_at_dirfd(abi_long dirfd, int last) { #ifdef AT_FDCWD |