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gdbstub: Implement gdb_do_syscallv() 

Implement a variant of the existing gdb_do_syscall() which
takes a va_list.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Christopher Covington <cov@codeaurora.org>
Message-id: 1439483745-28752-4-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2015-09-07 10:39:27 +01:00
parent 205ace55ff
commit 19239b39e7
2 changed files with 37 additions and 4 deletions
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14
gdbstub.c
View File

@ -1301,9 +1301,8 @@ send_packet:
%x - target_ulong argument printed in hex. %x - target_ulong argument printed in hex.
%lx - 64-bit argument printed in hex. %lx - 64-bit argument printed in hex.
%s - string pointer (target_ulong) and length (int) pair. */ %s - string pointer (target_ulong) and length (int) pair. */
void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...) void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va)
{ {
va_list va;
char *p; char *p;
char *p_end; char *p_end;
target_ulong addr; target_ulong addr;
@ -1317,7 +1316,6 @@ void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...)
#ifndef CONFIG_USER_ONLY #ifndef CONFIG_USER_ONLY
vm_stop(RUN_STATE_DEBUG); vm_stop(RUN_STATE_DEBUG);
#endif #endif
va_start(va, fmt);
p = s->syscall_buf; p = s->syscall_buf;
p_end = &s->syscall_buf[sizeof(s->syscall_buf)]; p_end = &s->syscall_buf[sizeof(s->syscall_buf)];
*(p++) = 'F'; *(p++) = 'F';
@ -1351,7 +1349,6 @@ void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...)
} }
} }
*p = 0; *p = 0;
va_end(va);
#ifdef CONFIG_USER_ONLY #ifdef CONFIG_USER_ONLY
put_packet(s, s->syscall_buf); put_packet(s, s->syscall_buf);
gdb_handlesig(s->c_cpu, 0); gdb_handlesig(s->c_cpu, 0);
@ -1366,6 +1363,15 @@ void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...)
#endif #endif
} }
void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...)
{
va_list va;
va_start(va, fmt);
gdb_do_syscallv(cb, fmt, va);
va_end(va);
}
static void gdb_read_byte(GDBState *s, int ch) static void gdb_read_byte(GDBState *s, int ch)
{ {
int i, csum; int i, csum;

27
include/exec/gdbstub.h
View File

@ -14,7 +14,34 @@
typedef void (*gdb_syscall_complete_cb)(CPUState *cpu, typedef void (*gdb_syscall_complete_cb)(CPUState *cpu,
target_ulong ret, target_ulong err); target_ulong ret, target_ulong err);
/**
* gdb_do_syscall:
* @cb: function to call when the system call has completed
* @fmt: gdb syscall format string
* ...: list of arguments to interpolate into @fmt
*
* Send a GDB syscall request. This function will return immediately;
* the callback function will be called later when the remote system
* call has completed.
*
* @fmt should be in the 'call-id,parameter,parameter...' format documented
* for the F request packet in the GDB remote protocol. A limited set of
* printf-style format specifiers is supported:
* %x - target_ulong argument printed in hex
* %lx - 64-bit argument printed in hex
* %s - string pointer (target_ulong) and length (int) pair
*/
void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...); void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...);
/**
* gdb_do_syscallv:
* @cb: function to call when the system call has completed
* @fmt: gdb syscall format string
* @va: arguments to interpolate into @fmt
*
* As gdb_do_syscall, but taking a va_list rather than a variable
* argument list.
*/
void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va);
int use_gdb_syscalls(void); int use_gdb_syscalls(void);
void gdb_set_stop_cpu(CPUState *cpu); void gdb_set_stop_cpu(CPUState *cpu);
void gdb_exit(CPUArchState *, int); void gdb_exit(CPUArchState *, int);