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Kernel: due to performance and real hardware testing reasons, put syscall logging and e9 behind compile time options

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Matheus
2023-07-05 19:48:32 -03:00
parent b75d634339
commit e662d52a73
3 changed files with 14 additions and 1 deletions
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kernel-src/Makefile
+2 -1
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@@ -10,7 +10,8 @@ LDFLAGS=-ffreestanding -nostdlib -lgcc -Wl,-T,"$(ARCHDIR)/kernel.ld" -g
PRINTFOPTS=-DPRINTF_DISABLE_SUPPORT_FLOAT
# flanterm includes break if the headers are moved into the include dir in the tree
FLANTERMINCDIR=$(shell pwd)/flanterm
CFLAGS=-g -ffreestanding -mcmodel=kernel -O2 -mno-red-zone -mgeneral-regs-only -mno-mmx -mno-sse -mno-sse2 -nostdlib -Wall -I "${INCDIR}" -I "$(ARCHINCDIR)" -I "$(FLANTERMINCDIR)" $(PRINTFOPTS)
KERNELCONFIG=#-DX86_64_ENABLE_E9 -DSYSCALL_LOGGING
CFLAGS=-g -ffreestanding -mcmodel=kernel -O2 -mno-red-zone -mgeneral-regs-only -mno-mmx -mno-sse -mno-sse2 -nostdlib -Wall -I "${INCDIR}" -I "$(ARCHINCDIR)" -I "$(FLANTERMINCDIR)" $(PRINTFOPTS) $(KERNELCONFIG)
ASFLAGS=-felf64
astral: $(OBJS)
kernel-src/arch/x86-64/e9.c
+4
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@@ -3,11 +3,15 @@
// TODO compile time options for disabling output to port e9h
void arch_e9_putc(char c) {
#ifdef X86_64_ENABLE_E9
outb(0xe9, c);
#endif
}
void arch_e9_puts(char *c) {
#ifdef X86_64_ENABLE_E9
while (*c) {
outb(0xe9, *c++);
}
#endif
}
kernel-src/arch/x86-64/syscalllog.c
+8
View File
@@ -2,6 +2,8 @@
#include <arch/e9.h>
#include <arch/cpu.h>
#ifdef SYSCALL_LOGGING
#define SYSCALL_COUNT 25
#define LOGSTR(x) arch_e9_puts(x)
@@ -63,7 +65,10 @@ static char *args[] = {
"dirfd %d pathname %d flags %d" // unlinkat
};
#endif
__attribute__((no_caller_saved_registers)) void arch_syscall_log(int syscall, uint64_t a1, uint64_t a2, uint64_t a3, uint64_t a4, uint64_t a5, uint64_t a6) {
#ifdef SYSCALL_LOGGING
char argbuff[768];
char printbuff[1024];
@@ -74,9 +79,11 @@ __attribute__((no_caller_saved_registers)) void arch_syscall_log(int syscall, ui
snprintf(printbuff, 1024, "\e[92msyscall: pid %d tid %d: %s: %s\n\e[0m", proc->pid, thread->tid, syscall < SYSCALL_COUNT ? name[syscall] : "invalid syscall", argbuff);
LOGSTR(printbuff);
#endif
}
__attribute__((no_caller_saved_registers)) void arch_syscall_log_return(uint64_t ret, uint64_t errno) {
#ifdef SYSCALL_LOGGING
char printbuff[1024];
thread_t *thread = _cpu()->thread;
@@ -84,4 +91,5 @@ __attribute__((no_caller_saved_registers)) void arch_syscall_log_return(uint64_t
snprintf(printbuff, 1024, "\e[94msyscall return: pid %d tid %d: %lu %lu\n\e[0m", proc->pid, thread->tid, ret, errno);
LOGSTR(printbuff);
#endif
}