git: 754cb545b68b - main - ddb: de-duplicate decode_syscall()
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Date: Mon, 03 Oct 2022 16:56:44 UTC
The branch main has been updated by mhorne: URL: https://cgit.FreeBSD.org/src/commit/?id=754cb545b68ba0a1643792763d000018ffe2afec commit 754cb545b68ba0a1643792763d000018ffe2afec Author: Mitchell Horne <mhorne@FreeBSD.org> AuthorDate: 2022-10-02 22:46:00 +0000 Commit: Mitchell Horne <mhorne@FreeBSD.org> CommitDate: 2022-10-03 16:49:54 +0000 ddb: de-duplicate decode_syscall() Only i386 and amd64 print the decoded syscall name in the backtrace. This de-duplication facilitates further changes and adoption by other platforms. Reviewed by: jrtc27, markj, jhb MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D36565 --- sys/amd64/amd64/db_trace.c | 25 +------------------------ sys/ddb/db_sym.c | 24 +++++++++++++++++++++++- sys/ddb/db_sym.h | 2 ++ sys/i386/i386/db_trace.c | 26 +------------------------- 4 files changed, 27 insertions(+), 50 deletions(-) diff --git a/sys/amd64/amd64/db_trace.c b/sys/amd64/amd64/db_trace.c index 90fcce5732d1..414202ef1008 100644 --- a/sys/amd64/amd64/db_trace.c +++ b/sys/amd64/amd64/db_trace.c @@ -34,7 +34,6 @@ __FBSDID("$FreeBSD$"); #include <sys/reg.h> #include <sys/smp.h> #include <sys/stack.h> -#include <sys/sysent.h> #include <machine/cpu.h> #include <machine/md_var.h> @@ -139,28 +138,6 @@ db_print_stack_entry(const char *name, db_addr_t callpc, void *frame) db_printf("\n"); } -static void -decode_syscall(int number, struct thread *td) -{ - struct proc *p; - c_db_sym_t sym; - db_expr_t diff; - sy_call_t *f; - const char *symname; - - db_printf(" (%d", number); - p = (td != NULL) ? td->td_proc : NULL; - if (p != NULL && 0 <= number && number < p->p_sysent->sv_size) { - f = p->p_sysent->sv_table[number].sy_call; - sym = db_search_symbol((db_addr_t)f, DB_STGY_ANY, &diff); - if (sym != DB_SYM_NULL && diff == 0) { - db_symbol_values(sym, &symname, NULL); - db_printf(", %s, %s", p->p_sysent->sv_name, symname); - } - } - db_printf(")"); -} - /* * Figure out the next frame up in the call stack. */ @@ -242,7 +219,7 @@ db_nextframe(struct amd64_frame **fp, db_addr_t *ip, struct thread *td) break; case SYSCALL: db_printf("--- syscall"); - decode_syscall(tf->tf_rax, td); + db_decode_syscall(tf->tf_rax, td); break; case INTERRUPT: db_printf("--- interrupt"); diff --git a/sys/ddb/db_sym.c b/sys/ddb/db_sym.c index 0c3a8963baae..3fdf80a76ae6 100644 --- a/sys/ddb/db_sym.c +++ b/sys/ddb/db_sym.c @@ -38,7 +38,7 @@ __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/pcpu.h> #include <sys/smp.h> -#include <sys/systm.h> +#include <sys/sysent.h> #include <net/vnet.h> @@ -481,3 +481,25 @@ db_sym_numargs(c_db_sym_t sym, int *nargp, char **argnames) { return (X_db_sym_numargs(db_last_symtab, sym, nargp, argnames)); } + +void +db_decode_syscall(int number, struct thread *td) +{ + struct proc *p; + c_db_sym_t sym; + db_expr_t diff; + sy_call_t *f; + const char *symname; + + db_printf(" (%d", number); + p = (td != NULL) ? td->td_proc : NULL; + if (p != NULL && 0 <= number && number < p->p_sysent->sv_size) { + f = p->p_sysent->sv_table[number].sy_call; + sym = db_search_symbol((db_addr_t)f, DB_STGY_ANY, &diff); + if (sym != DB_SYM_NULL && diff == 0) { + db_symbol_values(sym, &symname, NULL); + db_printf(", %s, %s", p->p_sysent->sv_name, symname); + } + } + db_printf(")"); +} diff --git a/sys/ddb/db_sym.h b/sys/ddb/db_sym.h index 1ad35e2b0c85..7ad7fb71f970 100644 --- a/sys/ddb/db_sym.h +++ b/sys/ddb/db_sym.h @@ -105,4 +105,6 @@ bool X_db_sym_numargs(db_symtab_t *, c_db_sym_t, int *, char **); void X_db_symbol_values(db_symtab_t *symtab, c_db_sym_t sym, const char **namep, db_expr_t *valuep); +void db_decode_syscall(int number, struct thread *td); + #endif /* !_DDB_DB_SYM_H_ */ diff --git a/sys/i386/i386/db_trace.c b/sys/i386/i386/db_trace.c index 529b94b76cc4..aee90ee058de 100644 --- a/sys/i386/i386/db_trace.c +++ b/sys/i386/i386/db_trace.c @@ -32,7 +32,6 @@ __FBSDID("$FreeBSD$"); #include <sys/kdb.h> #include <sys/proc.h> #include <sys/reg.h> -#include <sys/sysent.h> #include <machine/cpu.h> #include <machine/frame.h> @@ -196,7 +195,6 @@ static void db_nextframe(struct i386_frame **, db_addr_t *, struct thread *); static int db_numargs(struct i386_frame *); static void db_print_stack_entry(const char *, int, char **, int *, db_addr_t, void *); -static void decode_syscall(int, struct thread *); /* * Figure out how many arguments were passed into the frame at "fp". @@ -262,28 +260,6 @@ db_print_stack_entry(name, narg, argnp, argp, callpc, frame) db_printf("\n"); } -static void -decode_syscall(int number, struct thread *td) -{ - struct proc *p; - c_db_sym_t sym; - db_expr_t diff; - sy_call_t *f; - const char *symname; - - db_printf(" (%d", number); - p = (td != NULL) ? td->td_proc : NULL; - if (p != NULL && 0 <= number && number < p->p_sysent->sv_size) { - f = p->p_sysent->sv_table[number].sy_call; - sym = db_search_symbol((db_addr_t)f, DB_STGY_ANY, &diff); - if (sym != DB_SYM_NULL && diff == 0) { - db_symbol_values(sym, &symname, NULL); - db_printf(", %s, %s", p->p_sysent->sv_name, symname); - } - } - db_printf(")"); -} - /* * Figure out the next frame up in the call stack. */ @@ -396,7 +372,7 @@ db_nextframe(struct i386_frame **fp, db_addr_t *ip, struct thread *td) break; case SYSCALL: db_printf("--- syscall"); - decode_syscall(tf->tf_eax, td); + db_decode_syscall(tf->tf_eax, td); break; case INTERRUPT: db_printf("--- interrupt");